TWI403023B - Asymmetric gain communication device and communication method thereof - Google Patents

Description

Communication device with asymmetric gain antenna and communication method thereof

The present invention relates to a communication device and a communication method thereof, and more particularly to a communication device having an antenna antenna having a larger antenna gain than a transmitting antenna and selecting a receiving antenna according to the received communication quality, and a communication method thereof.

In recent years, with the popularity and booming of wireless communication, various wireless communication devices have sprung up. However, in order to effectively utilize and control the wireless spectrum, countries will limit the transmission power of specific frequencies to provide different The wireless protocol is used, however, this also limits the transmission distance of the signal.

In general, a wireless communication device has an antenna for transmitting and receiving, and its transmission power is regulated by the local law, which means that if the antenna transmission distance is increased by increasing the antenna gain, the transmission power will be relatively increased by increasing the antenna gain. Increase, and even cause laws and regulations beyond the location. Therefore, how to effectively improve the signal transmission distance of the wireless communication device has become one of the problems that various manufacturers are eager to solve when the transmission power conforms to the laws and regulations.

In view of this, some manufacturers have proposed to increase the antenna gain of the antenna, and to detect whether the transmission power exceeds the legal specifications. If it exceeds, the power is automatically adjusted and then transmitted, otherwise, the power is not adjusted. However, since increasing the antenna gain causes the radiation angle of the antenna to be narrow, it is susceptible to environmental fluctuations and the communication is unstable.

In summary, it can be known that the prior art has long existed in the case where the transmission power conforms to the law and the communication is stable, and the problem of the signal transmission distance cannot be effectively extended. Therefore, it is necessary to propose an improved technical means to solve this problem. problem.

In view of the problems of the prior art, the present invention discloses a communication device with an asymmetric gain antenna and a communication method thereof.

The communication device with the asymmetric gain antenna disclosed in the present invention comprises: a transmitting antenna, a receiving antenna, a transceiver unit, a recording unit, an arithmetic unit and a control unit. The transmitting antenna is configured to transmit the transmitting signal; the receiving antenna respectively receives the communication signal sent by the other communication device, wherein the antenna gain of the receiving antenna is greater than the antenna gain of the transmitting antenna; the transceiver unit is coupled to the transmitting antenna and coupled to the receiving through the selector An antenna, the transceiver unit is configured to generate a transmission signal and transmit through the transmitting antenna, and initially receive a communication signal from each receiving antenna; the recording unit is coupled to the transceiver unit for detecting the communication signal received by each receiving antenna. Recorded as a corresponding communication quality; the arithmetic unit is coupled to the recording unit for comparing the recorded communication qualities to select a receiving antenna having excellent communication quality, and further selecting a receiving antenna having the smallest antenna gain from the selected receiving antennas; The unit is configured to switch the selector according to the selected receiving antenna to maintain the selector electrically connected to the selected receiving antenna, so that the transceiver unit continuously receives the communication signal from the selected receiving antenna.

The communication method of the communication device with the asymmetric gain antenna of the present invention is applied to communication with another communication device, the steps comprising: providing a transmitting antenna for transmitting a transmission signal; providing a receiving antenna to respectively receive another a communication signal sent by the communication device, wherein the antenna gain of the receiving antenna is greater than the antenna gain of the transmitting antenna; initially receiving a communication signal from each receiving antenna; detecting the communication signal received by each receiving antenna to record the corresponding communication Quality; compare the recorded communication qualities to select a receiving antenna with excellent communication quality, and select the receiving antenna with the smallest antenna gain from the selected receiving antennas; and select and maintain the selector according to the selected receiving antenna switching selector The receiving antennas are electrically connected to each other to continue The selected receiving antenna receives the communication signal.

The apparatus and method disclosed by the present invention are as above, and the difference from the prior art is that the present invention is configured by configuring a transmitting antenna having different antenna gains and at least one receiving antenna, wherein at least one receiving antenna has an antenna gain greater than that of the transmitting antenna, respectively. The antennas are different from each other. During operation, the communication signals from the receiving antennas are detected to record the communication quality, and then the appropriate receiving antennas are instantly switched according to the communication quality at the time of reception.

Through the above technical means, the present invention can achieve the technical effect of optimizing the signal transmission distance and communication stability.

The embodiments of the present invention will be described in detail below with reference to the drawings and embodiments, so that the application of the technical means to solve the technical problems and achieve the technical effects can be fully understood and implemented.

Before describing the communication device with the asymmetric gain antenna disclosed in the present invention and the communication method thereof, the environment architecture to which the present invention is applied is described. The communication device with the asymmetric gain antenna according to the present invention is applied to a communication. The device (for example, a hub, a router) transmits various signals through the transmitting antenna and the receiving antenna, wherein the antenna gain of the receiving antenna is larger than the transmitting antenna, so as to increase the receiving distance of the signal. Since the receiving antenna and the transmitting antenna in the communication device have different antenna gains, the receiving distance and the transmitting distance of the signal are also different. Therefore, other communication devices with the same antenna configuration are required to extend the signal transmission distance and extend the signal. In the case of the transmission distance, it is ensured that the signal transmission is normal. In other words, the antenna gains of the receiving antenna and the transmitting antenna of the first communication device need to be the same as those of the receiving antenna and the transmitting antenna of the second communication device, respectively. In this way, normal communication can be maintained even if the receiving distance of the communication device is different from the transmission distance of the signal. In particular, although the present invention needs to be matched with other communication devices having the same antenna configuration in the case of extending the signal transmission distance, the present invention can also have different antenna configurations with others without extending the signal transmission distance. The communication device performs signal transmission.

The communication device with the asymmetric gain antenna and the communication method thereof according to the present invention will be further described below with reference to the drawings. Please refer to FIG. 1 and FIG. 1 is a block diagram of a communication device with an asymmetric gain antenna according to the present invention. The transmission antenna 110, the receiving antenna (111, 112), the transceiver unit 120, the selector 121, the recording unit 130, the operation unit 140, and the control unit 150 are included. The transmitting antenna 110 is configured to transmit the transmitting signal, the receiving antennas (111, 112) respectively receive the communication signals sent by the other communication device, and the antenna gain of the receiving antennas (111, 112) is greater than the transmitting antenna 110. In practical implementation, multiple receiving antennas (111, 112) and one transmitting antenna 110 may be simultaneously provided, wherein each receiving antenna (111, 112) may have various antenna gains larger than the transmitting antenna 110, respectively. For example, assuming that the antenna gain of the transmitting antenna 110 is "3dbi", the antenna gains of the respective receiving antennas (111, 112) may be "5dbi", "7dbi", and "10dbi", respectively, etc. . In particular, the present invention does not limit the antenna gain of the transmitting antenna 110 and the receiving antennas (111, 112). The antenna gain of the transmitting antenna 110 is determined by the transmission power of the transmitting antenna according to the local telecommunications specification. The antenna gain of the receiving antennas (111, 112) is greater than the antenna gain of the transmitting antenna 110. In addition, in the actual antenna configuration, only one receiving antenna 111 and one transmitting antenna 110 may be provided for receiving the communication signal and transmitting the transmitting signal respectively, and similarly, the antenna gain of the receiving antenna 111. Still greater than the antenna gain of the transmit antenna 110 is required.

The transceiver unit 120 is coupled to the transmitting antenna 110 and coupled to the receiving antenna (111, 112) through the selector 121. The transceiver unit 120 is configured to generate a transmitting signal and transmit the same through the transmitting antenna 110, and initially from each receiving antenna (111). And 112) receiving the communication signal, and continuously receiving the communication signal from one of the receiving antennas after the initial completion. In practical implementation, the transceiver unit 120 can perform digital and analog conversion, for example, converting the communication signal received by the receiving antenna (111, 112) into digital form data, and converting the digital form data into an analog form. The transmitted signal is transmitted through the transmitting antenna 110. In particular, the selector 121 is a switch that can be electrically connected to be electrically connected (ie, shorted) to one of the receiving antennas to continue to use the receiving unit 120 after initial completion. The antenna receives the communication signal, and the circuit connection mode of the transceiver unit 120 with the transmitting antenna and the receiving antenna will be described later with reference to the drawings.

The recording unit 130 is coupled to the transceiver unit 120 for detecting the communication signals received by each of the receiving antennas (111, 112) for recording as corresponding communication qualities. In actual implementation, the detection method can detect the power level of the communication signal received by each receiving antenna (111, 112) and the bit error rate (BER) or two of the detection signals at intervals. Any one of the signals, and the source of the signal for detecting the communication signal, for recording the communication quality of the corresponding receiving antenna, the recording unit 130 may be, for example, a cache memory or a flash memory. ...Volatile or non-volatile memory devices. Since the detection power size and the analysis bit error rate are well-known techniques, no further details are provided herein.

The operation unit 140 is coupled to the recording unit 130 for comparing the quality of each communication recorded by the recording unit 130 to determine the quality and disadvantage, and selecting one of the receiving antennas according to the quality of each communication quality and the antenna gain of the receiving antenna. The quality of the communication antenna can be considered first, and then the antenna gain of the receiving antenna can be considered. For example, the receiving antenna with good communication quality is selected first, and then one receiving antenna with the smallest antenna gain is selected from these receiving antennas. For example, it is assumed that the operation unit 140 learns that the communication quality of the first receiving antenna 111 is higher than that of the second receiving antenna 112, and the antenna gain of the first receiving antenna 111 is smaller than that of the second receiving antenna 112. Gain, then the arithmetic unit 140 will select the first receiving antenna 111 as the antenna used to receive the communication signal. In practical implementation, the operation unit 140 pre-stores the antenna gain of each of the receiving antennas (111, 112), so that the receiving antenna with the lowest antenna gain is selected to increase the radiation range (ie, the communication is improved). Offset). In addition, the operation unit 140 may further filter the communication quality recorded by the recording unit 130 in advance. For example, under the condition of the same time and the same receiving antenna, the records of a few different communication qualities are filtered out in advance. Compare.

The control unit 150 is configured to switch the selector 121 in the transceiver unit 120 according to the receiving antenna selected by the computing unit 140, so that the selector 121 maintains electrical connection with the selected receiving antenna for continuous selection by the transceiver unit 120. The receiving antenna receives the communication signal. In other words, when the selector 121 is electrically connected to the selected receiving antenna, the transceiver unit 120 completes initialization and continuously receives the communication signal through the selected receiving antenna. In particular, when the communication quality of the communication signal or the communication signal is inferior, the transceiver unit 120 is reset to the initial state, and the communication signal is received again from each of the receiving antennas (111, 112). For the computing unit 140 to reselect one of the receiving antennas to receive the communication signal.

In addition, the communication device with the asymmetric gain antenna of the present invention may further comprise a low noise amplifier, the low noise amplifier is connected in series with the selector 121 at one end, and the other end is connected in series to the transceiver unit 120 so as to be selected from the The communication signal of the receiving antenna is amplified by the signal. In an actual implementation, the present invention can also replace the low noise amplifier with a low noise gain unit, and includes an adjustment unit 160 coupled to the operation unit 140 and the low noise gain unit, so that the adjustment unit 160 is selected according to the operation unit 140. The communication quality of the receiving antenna is used to adjust (ie, amplify or attenuate) the gain of the low noise gain unit to maintain the communication quality in an optimal state. The low noise gain unit can be an automatic gain control type, which will be coordinated with the drawing later. Detailed description.

Next, please refer to FIG. 2, and FIG. 2 is a flowchart of a method for communicating a communication device with an asymmetric gain antenna according to the present invention, which is applied to communication with another communication device, and the steps thereof include: Providing a transmitting antenna for transmitting a transmitting signal (step 210); providing a receiving antenna to respectively receive a communication signal sent by another communication device, wherein an antenna gain of the receiving antenna is greater than an antenna gain of the transmitting antenna (step 220); Receiving a communication signal from each receiving antenna (step 230); detecting a communication signal received by each receiving antenna to record as a corresponding communication quality (step 240); comparing the quality of each communication recorded to determine the merits and demerits, and according to each The quality of the communication quality and the antenna gain of the receiving antenna are selected as one of the receiving antennas (step 250); the selector is switched according to the selected receiving antenna to maintain the selector electrically connected to the selected receiving antenna for continuous self-selected reception. The antenna receives the communication signal (step 260). Through the above steps, a transmitting antenna with different antenna gains and at least one receiving antenna can be configured, wherein at least one receiving antenna has an antenna gain greater than the transmitting antenna and different from each other, and detects communication from the receiving antenna during operation. The signal is used to record the communication quality, and then the appropriate receiving antenna is selected and switched according to the communication quality at the time of reception. In particular, after step 260, the communication signal received by the selected receiving antenna can be amplified or attenuated by the low noise gain unit (step 270); and can be adjusted according to the communication quality of the selected receiving antenna. The gain value of the low noise gain unit (step 280).

The following description will be made by way of example with reference to "FIG. 3" and "FIG. 4". Please refer to "FIG. 3" first, and "FIG. 3" is a circuit diagram of the control unit switching selector of the present invention. The transmitting antenna 110 is configured to transmit the transmitting signal, and the receiving antennas (111, 112) respectively receive the communication signals sent by the other communication device, and the antenna gain of the receiving antennas (111, 112) is greater than the antenna gain of the transmitting antenna 110. The transceiver unit 120 can couple the low noise amplifier 122, and a selector 121 is connected in series between the low noise amplifier 122 and the receiving antennas (111, 112). In this example, the transceiver unit 120 is coupled to the two receiving antennas (111, 112) through the serial low noise amplifier 122 and the pair of two switching switches (ie, the selector 121) to receive the communication signal, and is permeable. A power amplifier 123 is coupled to a transmit antenna 110 for transmitting transmit signals.

Next, the recording unit 130 is coupled to the transceiver unit 120 to detect the communication signals received by each of the receiving antennas (111, 112) for recording the communication quality of the respective receiving antennas (111, 112), for example, recording the receiving antenna. The communication quality of 111 is "-70dbm; excellent", and the communication quality of the recording receiving antenna 112 is "-80dbm; inferior", wherein "-70dbm" and "-80dbm" represent the receiving power of the receiving antenna 111 and the receiving antenna 112, " The "good" and "inferior" are determined by the recording unit 130 based on the bit error rate (BER) of the receiving antenna 111 and the receiving antenna 112.

As described above, the arithmetic unit 140 compares the communication qualities recorded by the recording unit 130, and selects one of the receiving antennas according to the quality of each communication quality and the antenna gain of the receiving antenna. In the above example, the assumption is assumed. The antenna gain of the first receiving antenna 111 is smaller than that of the second receiving antenna 112. Since the communication quality of the receiving antenna 111 is better and the antenna gain of the first receiving antenna 111 is smaller, the arithmetic unit 140 is at two receiving antennas ( The receiving antenna 111 is selected in 111, 112). At this time, the control unit 150 controls the selector 121 to switch the switch according to the receiving antenna 111 selected by the computing unit 140, so that the selector 121 and the receiving antenna 111 are electrically connected to each other (ie, short-circuited), and the selector 121 and the receiving antenna 112 are Open circuit. In this way, the transceiver unit 120 can receive the communication signal via the receiving antenna 111, and amplify the communication signal through the low noise amplifier 122 for subsequent signal processing. In particular, in actual implementation, if the computing unit 140 compares and knows that the communication qualities of the two receiving antennas (111, 112) are the same, the computing unit 140 compares the two receiving antennas (111, 112) Antenna gain to select a receiving antenna with a smaller antenna gain. In addition, assuming that there are three or more receiving antennas (not shown), the arithmetic unit 140 can calculate the average antenna gain of the receiving antenna with the best communication quality and the antenna gain of the receiving antenna with the worst communication quality to calculate the average. Value, and select the receive antenna whose antenna gain is closest to this average.

Please refer to "Fig. 4", which is a circuit diagram of the adjustment unit adjusting the gain of the low noise gain unit. The adjustment unit 160 can adjust the gain of the low noise gain unit 124 according to the communication quality of the receiving antenna selected by the operation unit 140 to maintain the communication quality in an optimal state. In this example, the low noise gain unit 124 can be an automatic gain control type and electrically connected to the adjustment unit 160 to receive the electrical signal transmitted by the adjustment unit 160 to adjust the gain. For example, it is assumed that the control unit 150 controls The selector unit 121 electrically connects the transceiver unit 120 and the receiving antenna 111 to each other. If the communication signals received by the receiving antenna 111 have different receiving powers, such as “-70dbm” and “-80dbm”, the operation unit 140 can perform communication according to the communication. The quality filters out unnecessary communication signals (for example, filtering a communication signal with a lower received power or filtering according to the signal source of the communication signal), and then adjusting the low frequency according to the received power of the filtered communication signal through the adjustment unit 160. The gain of the gain unit 124, for example, the automatic gain is three times when the received power is below "-100dbm"; the automatic attenuation is doubled when the received power is above "0dbm"... and so on. Although the present invention exemplifies the received power and the adjustment gain as described above, the present invention is not limited thereto, in other words, as long as it can be adjusted according to the received power or signal quality (which can be judged by the bit error rate) (for example). The amplification or attenuation of the gain of the low noise gain unit 124 does not depart from the scope of application of the present invention.

In summary, it can be seen that the difference between the present invention and the prior art is that by configuring the transmitting antenna 110 having different antenna gains and at least one receiving antenna, at least one of the receiving antennas has antenna gains greater than the transmitting antennas and different from each other. In operation, the communication signal from the receiving antenna is detected to record the communication quality, and then the appropriate receiving antenna is selected and switched according to the communication quality at the time of receiving, thereby solving the problems of the prior art by using a technical means. In turn, the technical effect of improving the signal transmission distance and communication stability is achieved.

While the present invention has been described above in the foregoing embodiments, it is not intended to limit the invention, and the invention may be modified and modified without departing from the spirit and scope of the invention. The scope of patent protection shall be subject to the definition of the scope of the patent application attached to this specification.

110. . . Transmitting antenna

111, 112. . . Receive antenna

120. . . Transceiver unit

121. . . Selector

122. . . Low noise amplifier

123. . . Power amplifier

124. . . Low noise gain unit

130. . . Recording unit

140. . . Arithmetic unit

150. . . control unit

160. . . Adjustment unit

Step 210 provides a transmit antenna for transmitting a transmit signal

Step 220: providing at least one receiving antenna to respectively receive a communication signal sent by another communication device, where an antenna gain of the at least one receiving antenna is greater than an antenna gain of the transmitting antenna

Step 230: Initially receive a communication signal from each receiving antenna.

Step 240: Detecting the communication signal received by each receiving antenna to record the corresponding communication quality.

Step 250 compares the quality of each of the recorded communications to determine the quality and disadvantage, and select one of the at least one receiving antenna according to the quality of the communication quality and the antenna gain of the receiving antenna.

Step 260 ‧ ‧ </ RTI> switching a selector according to the selected receiving antenna, so that the selector maintains electrical connection with the selected receiving antenna to continuously receive the communication signal from the selected receiving antenna

Step 270‧‧ ‧ amplifying or attenuating the communication signal received by the selected receiving antenna through a low noise gain unit

Step 280‧‧‧ Adjust the gain value of the low noise gain unit according to the communication quality of the selected receiving antenna

1 is a block diagram of a device for a communication device having an asymmetric gain antenna according to the present invention.

2 is a flow chart of a method for communicating a communication device with an asymmetric gain antenna according to the present invention.

Figure 3 is a circuit diagram of the control unit switching selector of the present invention.

FIG. 4 is a schematic diagram of a circuit for adjusting the gain of the low noise gain unit by the adjusting unit of the present invention.

110. . . Transmitting antenna

111, 112. . . Receive antenna

120. . . Transceiver unit

121. . . Selector

130. . . Recording unit

140. . . Arithmetic unit

150. . . control unit

160. . . Adjustment unit

Claims (14)

A communication device with an asymmetric gain antenna, comprising: a transmitting antenna for transmitting a transmitting signal; and at least one receiving antenna for respectively receiving a communication signal sent by another communication device, wherein the at least one receiving antenna An antenna gain is greater than an antenna gain of the transmit antenna; a transceiver unit coupled to the transmit antenna and coupled to the at least one receive antenna via a selector, the transceiver unit for generating the transmit signal and transmitting the transmit antenna, and Initially receiving the communication signal from each receiving antenna; a recording unit coupled to the transceiver unit for detecting the communication signal received by each receiving antenna for recording as a corresponding communication quality; an arithmetic unit, coupling Up to the recording unit, for comparing the recorded communication qualities to select a receiving antenna with excellent communication quality, and further selecting a receiving antenna having the smallest antenna gain from the selected receiving antennas; and a control unit for selecting according to the selection The receiving antenna switches the selector to maintain the selector with the selected receiving antenna Connected to the receiving antenna for the transceiver unit continuously receiving from the selected communication signal. The communication device with an asymmetric gain antenna according to claim 1, wherein the selector is a switch for electrically connecting the transceiver unit to one of the at least one receiving antenna. The communication device with an asymmetric gain antenna according to claim 1, wherein the device further comprises a low noise gain unit, wherein the low noise gain unit is connected in series with the selector, and the other end is connected in series with the transceiver. Unit for selecting The communication signal received by the receiving antenna is amplified or attenuated by the signal. The communication device with an asymmetric gain antenna according to claim 3, wherein the device further comprises an adjustment unit coupled to the operation unit and the low noise gain unit for selecting the received antenna The communication quality adjusts the gain value of the low noise gain unit. The communication device with an asymmetric gain antenna according to claim 1, wherein the communication quality includes at least a power level of the communication signal and a bit error rate or both of the signal sources. The communication device with an asymmetric gain antenna according to claim 1, wherein the arithmetic unit preferentially selects a receiving antenna having a small antenna gain when the communication quality is the same. The communication device with an asymmetric gain antenna according to claim 1, wherein the operation unit reads the antenna gain of the receiving antenna with the best communication quality and the antenna gain of the receiving antenna with the worst communication quality to calculate an average Value, and select the receive antenna whose antenna gain is closest to the average. A communication method for a communication device having an asymmetric gain antenna is applied to communication with another communication device, the method comprising: providing a transmitting antenna for transmitting a transmitting signal; providing at least one receiving antenna to respectively receive another a communication signal sent by a communication device, wherein an antenna gain of the at least one receiving antenna is greater than an antenna gain of the transmitting antenna; initially receiving a communication signal from each receiving antenna; detecting the received by each receiving antenna The communication signal is recorded as a corresponding communication quality; Aligning each of the communication qualities recorded to select a receiving antenna having excellent communication quality, and selecting a receiving antenna having the smallest antenna gain from the selected receiving antennas; and switching a selector according to the selected receiving antenna to make the selector The receiving antenna is maintained and electrically connected to receive the communication signal continuously from the selected receiving antenna. The communication method of the communication device with the asymmetric gain antenna according to the eighth aspect of the invention, wherein the selector is a switch for switching electrical connection to one of the at least one receiving antenna. The method for communicating a communication device with an asymmetric gain antenna according to claim 8 , wherein the method further comprises: amplifying the communication signal received by the selected receiving antenna by a low noise gain unit or attenuation. The communication method of the communication device with the asymmetric gain antenna according to claim 10, wherein the method further comprises adjusting the gain value of the low noise gain unit according to the communication quality of the selected receiving antenna. The communication method for a communication device with an asymmetric gain antenna according to claim 8, wherein the communication quality includes at least a power level of the communication signal and a bit error rate or both of the signal sources. The communication method of the communication device with the asymmetric gain antenna according to claim 8 , wherein in the step of selecting one of the at least one receiving antennas, the antenna gain is preferentially selected in the case where the communication quality is the same. Receiving antenna. Communication device with asymmetric gain antenna as described in claim 8 a communication method, wherein the step of selecting one of the at least one receiving antennas is to read an antenna gain of a receiving antenna having the best communication quality and an antenna gain of a receiving antenna having the worst communication quality to calculate an average value, and selecting The receiving antenna whose antenna gain is closest to the average.