JP2593020B2 - Wireless communication device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio communication device,
In particular, the present invention relates to an apparatus for performing communication in a band lower than the UHF band.

[0002]

2. Description of the Related Art FIG. 5 is a block diagram of a conventional radio communication apparatus. In FIG. 5, reference numeral 1 denotes a radio communication apparatus main body below the UHF band, 2 denotes an antenna thereof, and 3 denotes radio wave propagation. 4 is input data and 5 is output data. Note that the subscript a in the figure number
Indicates the transmission side, and b indicates the reception side.

Next, the operation will be described. The input data (arbitrary or digital) 4 is transmitted to the wireless communication device 1a.
Thus, the signal is modulated into FM (or PM, AM, etc.), converted into a transmission frequency, and transmitted as the radio wave propagation 3 through the antenna 2a. The radio wave propagation 3 is received by the antenna 2b on the receiving side, received and demodulated by the wireless communication device 1b, and output as output data 5.

[0004]

Since the conventional radio communication apparatus is configured as described above, it is necessary to develop a new communication system in order to up-convert the frequency, which is easy. It was difficult to convert to higher frequencies. For this reason, when using a wireless communication device in the UHF band or lower as a base, there is a problem that a great deal of cost and time are required for improving the wireless communication device and newly developing a wireless communication device using the millimeter wave band.

[0005] As a device for up-converting a signal in the UHF band to a signal in the EHF band, see, for example, Japanese Patent Application Laid-Open No. 2-8 / 1990.
As shown in Japanese Patent Publication No. 2703, a carrier is divided into two by a 90 ° divider, and an E signal generated from a local oscillator is added to an original signal.
After mixing an HF signal with a mixer and mixing it with a signal distributed at 90 ° to remove spurious components, a signal in an EHF band having a desired frequency is obtained. -It is necessary to accurately perform phase matching between synthesizers, and it is difficult to perform phase matching.
There is a risk that spurious components may be generated due to the mismatch, and there is a problem that a configuration for up-converting the modulated signal as it is is necessary.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and a radio communication system capable of easily up-converting a frequency to perform communication without improving a base communication device itself. The aim is to obtain a device.

[0007]

SUMMARY OF THE INVENTION A radio communication apparatus according to the present invention provides a radio communication apparatus for performing radio communication in a band lower than a UHF band.
A millimeter-wave transmission device including a transmission device, a wideband modulator that modulates a millimeter-wave band carrier with a communication signal from the UHF transmission device, and a transmitter that outputs the modulated output to a transmission antenna; A receiver for receiving the millimeter-wave band transmission signal via an antenna, a wideband demodulator for demodulating the UHF transmission output from the reception signal, and a UH for receiving the demodulation output
A millimeter wave band receiving device is constituted by the F band receiving device.

Further, a UHF transmission / reception device is connected to a wideband
Second antennas are respectively provided between the demodulators and the frequency bands for transmission and reception are switched using a switch.

Also, a plurality of UHF transmitters are provided, and an adder for adding the outputs of the plurality of UHF transmitters and outputting the sum to the wideband modulator is provided. The wireless communication is performed in accordance with a desired frequency of the plurality of UHF transmission devices.

[0010]

According to the present invention, a millimeter-wave band carrier is directly modulated and demodulated at the output of a conventional UHF transmitter, and demodulated,
Since the data is input to the HF receiver to perform wireless communication, communication can be easily performed using the millimeter wave band without any improvement of the base wireless device.

[0011] Further, the UHF transmission / reception device and the wide band variable
Since the second antennas are provided between the demodulators and the frequency bands at the time of transmission and reception are switched using the switching device, communication can be performed even in a band lower than the UHF band.

Also, a plurality of UHF transmitters are provided, and an adder for adding the outputs of the plurality of UHF transmitters and outputting the sum to the wideband modulator is provided. By performing wireless communication in accordance with a desired frequency among the plurality of UHF transmission devices, a communication device having a transmission side as a base station can be configured.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. 1, the same reference numerals as those in FIG. 5 denote the same or corresponding parts, 6 denotes a broadband modem, 7 denotes a millimeter wave transceiver, and 8 denotes a millimeter wave antenna. Reference numeral 20 denotes a millimeter-wave band transmission device of the wireless communication device, and reference numeral 21 denotes a millimeter-wave band reception device.

Next, the operation will be described. In FIG. 1, input data 4 is input to a conventional radio 1a, and a millimeter-wave carrier is modulated by a UHF transmission wave by a wideband modulator 6a.
After up-conversion to the millimeter wave band, the modulated signal is transmitted by the millimeter wave transceiver 7a through the antenna 8a.

On the other hand, on the receiving side, the transmitted signal 3 is received by the millimeter wave receiver 7b from the receiving antenna 8b, then down-converted by the wideband demodulator 6b and
The signal is demodulated into an HF signal, and the signal is input to the conventional communication device 1b, where the data is reproduced and output to the terminal 5.

As described above, according to the present embodiment, the millimeter wave carrier is modulated by the UHF transmission wave of the communication device 1a by the wideband modulator 6a and up-converted to the millimeter wave band, and this is converted to the millimeter wave transmitter 7a. From the millimeter wave antenna 8a via
The millimeter wave antenna 8b receives the millimeter wave band transmission signal at the millimeter wave receiver 7b, down-converts it at the wide band demodulator 6b, demodulates the UHF transmission wave, and reproduces the data at the communication device 1b. , Conventional UHF band communication device 1
Using a and 1b as they are, the frequency can be easily up-converted to perform communication in the millimeter wave band.

Next, a second embodiment of the present invention will be described. In this embodiment, the configuration of the first embodiment is improved and the UH
Communication can be performed even in a band below the F band. That is, in FIG. 2, reference numeral 9a denotes a transmission-side switch provided at the subsequent stage of the communication device 1a, and switches the output of the communication device 1a to the wideband modulator 6a or the UHF band antenna 2a and outputs the same. Reference numeral 9b denotes a reception-side switch provided at a stage subsequent to the wideband demodulator 6b, and switches the output of the wideband demodulator 6b or the reception signal of the UHF band antenna 2a to the communication device 1b for output.

With this configuration, the conventional wireless devices 1a and 1b having good communication at a long distance can be used to transmit UHF signals.
Communication can be performed in a band, and communication can be performed in a millimeter wave band in which a large amount of information can be transmitted in a short distance, and effective use of radio waves can be achieved.

In the second embodiment, only one receiving and transmitting device is provided, but as shown in FIG.
N-to-N communication can be performed by using a plurality of receiving and transmitting devices so as to face each other and using several transmission / reception frequencies of each communication device 1a. In this case, the frequency in the millimeter wave band is one. Therefore, the use efficiency of the radio wave can be made very effective.

Next, a third embodiment of the present invention will be described with reference to FIG. This embodiment shows an example of application to a small-zone mobile telephone. A plurality of communication devices 1a are provided as shown in FIG. The signal is input to the transmitter 6a and output within the millimeter wave. The thus configured millimeter wave transmitter is used as a base station, and the signal is transmitted to each terminal 2.
1A to 21Z receive at the assigned frequency, while the terminals 21A to 21Z output the assigned transmission wave, and the base station receives this by one millimeter wave receiver and sends it to the adder 11. The received signals from the terminals 21A to 21Z are reproduced by the communication devices.

[0021]

As described above, according to the radio communication apparatus of the present invention, the millimeter-wave band carrier is directly modulated and demodulated at the output of the conventional UHF transmission apparatus, demodulated and input to the UHF reception apparatus for radio communication. Since the communication system is configured to perform communication, there is an effect that communication can be easily performed by converting to a new frequency band.

A second antenna is provided between the UHF transmission / reception device and the wideband modulator / demodulator, and the frequency band for transmission / reception is switched using a switch. Communication can be performed even in this band, and there is an effect that the use of radio waves can be improved by multiplexing channels.

Also, a plurality of UHF transmitters are provided, and an adder for adding the outputs of the plurality of UHF transmitters and outputting the sum to the wideband modulator is provided. By performing wireless communication in accordance with a desired frequency among the plurality of UHF transmission devices, it is possible to configure a communication device having a transmission side as a base station, thereby facilitating networking. is there.

[Brief description of the drawings]

FIG. 1 is a block diagram of a wireless communication device according to an embodiment of the present invention.

FIG. 2 is a block diagram of a wireless communication apparatus according to a second embodiment of the present invention.

FIG. 3 is a block diagram showing a modification of the wireless communication apparatus according to the second embodiment of the present invention.

FIG. 4 is a block diagram of a wireless communication apparatus according to a third embodiment of the present invention.

FIG. 5 is a block diagram showing a conventional wireless communication apparatus.

[Explanation of symbols]

 1 UHF band or lower radio communication device 2 UHF band antenna 3 Radio wave propagation 4 Input data terminal 5 Output data terminal 6a Broadband modulator 6b Broadband demodulator 7a Millimeter wave transmitter 7b Millimeter wave receiver 8 Millimeter wave antenna 9 Switch 11 Adder 20 Millimeter wave transmitter 21 Millimeter wave receiver

Claims (3)

(57) [Claims] 1. A radio communication apparatus having a function of performing radio communication by performing a frequency up conversion of a band of a transmission apparatus that performs radio communication in a band of UHF band or less to a millimeter wave band. -Wave transmission including a UHF transmission apparatus for performing wireless communication by using a UHF transmission apparatus, a wideband modulator that modulates a millimeter-wave band carrier with a communication signal from the UHF transmission apparatus, and a transmitter that outputs the modulated output to a transmission antenna. A receiver for receiving the millimeter-wave band transmission signal via a receiving antenna, a wideband demodulator for demodulating the UHF transmission output from the reception signal, and a UHF band reception device for receiving the demodulated output. A wireless communication device comprising a millimeter wave band receiving device. 2. The wireless communication device according to claim 1, wherein a second transmission antenna provided between the UHF transmission device and the wideband modulator and a communication signal of the UHF transmission device are transmitted to the second transmission antenna. A transmission-side switch for switching to and outputting an antenna, a second antenna for reception provided between the UHF band receiver and the wideband demodulator, an output of the wideband demodulator and the second reception. A wireless communication device comprising: a receiving-side switch for switching an output from a service antenna and transmitting the output to the UHF band receiving device. 3. The wireless communication apparatus according to claim 1, wherein a plurality of said UHF transmitters of said millimeter-wave band transmitter are provided, and outputs of said plurality of UHF transmitters are added and output to said wideband modulator. A wireless communication device comprising an adder, and performing wireless communication by adjusting a frequency of a receiver of the millimeter wave band receiving device to a desired frequency of the plurality of UHF transmitting devices.