KR20070003257A - Wireless communication terminal for improving data rate of reverse channel - Google Patents

Abstract

A wireless communication terminal for improving a reverse data rate is provided to be additionally embedded with a transmission end to use the embedded transmission end for data transmission only, thereby improving a reverse data rate. The second transmission end comprises as follows. An RF(Radio Frequency) conversion frequency up converter(210) converts a baseband signal into an analog signal, and frequency-up-converts the analog signal into an RF signal. The first BPF(Band Pass Filter)(212) filters the frequency-up-converted analog RF signal. An amplifier(213) amplifies the filtered RF signal. The second BPF(214) filters the amplified RF signal. A VCO(Voltage Controlled Oscillator)(211) provides a local signal for driving the converter(210) to the converter(210).

Description

Wireless communication terminal for improving data rate of reverse channel

1 is a configuration diagram of a general wireless communication terminal,

2 is a configuration diagram of a wireless communication terminal devised by Qualcomm,

3 is a configuration diagram of an embodiment of a wireless communication terminal according to the present invention.

* Explanation of symbols for the main parts of the drawings

210: second RF conversion frequency up-converter 211: voltage controlled oscillator

212, 214: bandpass filter 213: amplifier

The present invention relates to a wireless communication terminal for improving the reverse data transmission speed, and more particularly, to a wireless communication terminal for improving the reverse data transmission speed by adding a transmitting terminal and using only for data transmission.

Currently, a representative method of wirelessly transmitting and receiving data is an infrared communication method and a wireless Internet network using a wireless application protocol based on a mobile communication network.

Infrared communication method is advantageous for a lot of data transmission and high speed transmission by using broadband, but due to the characteristic of using light, it is vulnerable to interference and refraction of light and thus has to be used only at close range.

There are IS-95A, 95B, 1X-EVDO, and IMT-2000 methods for transmitting and receiving data using a wireless application protocol. In terms of data rates, the IS-95B communication protocol supports 64Kbps for circuit data services and 115.2Kbps for packet data services, compared to IS-95A. In addition, CDMA2000 1xEV-DO (CDMA2000 1x Evolution Data Only) is a high-speed wireless data communication technology based on the synchronous 3rd generation mobile communication service method. Faster than 2Mbps of WCDMA. In addition, IMT-2000 defines a service that provides multimedia at a rate of 10Mbps while moving. However, the current IMT-2000 service is inadequate in network facilities, the actual data transmission rate is 384Kbps, and there is a limit to providing personalized multimedia service that 2Mbps should be guaranteed in the stationary state.

Meanwhile, 1xEV-DV (Data & Video) improved in the future can be up to 3.1Mbps, and High Speed Downlink Packet Access (HSDPA) supports a transmission rate of 10Mbps.

However, all of the data services described above are based on the transmission speed of the receiving end, and there is no problem in that the user uses the contents with his or her wireless communication terminal, but when transmitting data in remote data exchange between different users. Supporting speeds up to 153.6 Kbps, there is a problem in transmitting data with a large amount of video and information in addition to voice.

1 is a configuration diagram of a general wireless communication terminal, and is a configuration diagram of a wireless communication terminal currently commercially available. The operation is described as follows.

First, referring to the receiver, the analog RF signal received through the antenna 101 is input to the low noise amplifier 103 through the duplexer 102 and amplified and then filtered by a band pass filter (BPF) 104. Input to RFR6000 (Radio Frequency receiver, 105). The analog signal input to the RFR6000 105 is converted into a digital signal by the analog-to-digital converter inside the RFR6000 105, and then converted into I / Q data of impedance real and imaginary number, and the converted data is input to the MSM 106. do.

In addition, referring to the transmitter, the digital signal output from the MSM 106 is input to a RFT6100 (Radio Frequency Transfer, 107), and the input digital signal is converted into an analog signal by a digital-to-analog converter in the RFT6100 (107). The converted analog signal is filtered by the bandpass filter 108 and then amplified by the amplifier 109, and the amplified signal is transmitted through the antenna 101 through the duplexer 102.

At this time, the local signal output from the voltage controlled oscillator (VCO: Voltage Controlled Oscillator, 110) is input to the RFT6100 (107) via the RFR6000 (105), the RFT6100 (107) is the signal back to the voltage controlled oscillator (110) Return to.

The currently commercialized wireless communication terminal shown in FIG. 1 is not capable of data transmission at the same time after a voice call is connected, and there is a limitation in transmission speed in various multimedia data transmission as described above.

2 is a configuration diagram of a wireless communication terminal devised by Qualcomm, and unlike FIG. 1, one more receiving end is added. At this time, the phase locked loops (PLL) 203 are used to generate a local frequency in the voltage controlled oscillator 202. That is, since the RFR6000 201 used for the second receiver has no RX phase locked loop, the phase locked loop 203 is further used.

The wireless communication terminal shown in FIG. 2 enables the GPS function during a call, and also improves the data reception speed and sensitivity, but the transmission speed is limited in transmitting various multimedia data such as the wireless communication terminal shown in FIG. There is a problem.

The present invention has been proposed to solve the above problems, and an object thereof is to provide a wireless communication terminal for improving a reverse data transmission speed by additionally embedding a transmitter and using only data transmission.

Other objects and advantages of the present invention can be understood by the following description, and will be more clearly understood by the embodiments of the present invention. Also, it will be readily appreciated that the objects and advantages of the present invention may be realized by the means and combinations thereof indicated in the claims.

The present invention for achieving the above object is a wireless communication terminal comprising a second transmitter for use only for data transmission, the second transmitter is a baseband signal output from the control unit to convert an analog signal into an RF signal An RF converting frequency upconverter for frequency upconverting; A first bandpass filter for filtering the frequency upconverted analog RF signal; An amplifier for amplifying the filtered RF signal; A second bandpass filter for filtering the amplified RF signal; And a voltage controlled oscillator for providing a local signal for driving the RF converted frequency upconverter to the RF converted frequency upconverter.

The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, whereby those skilled in the art may easily implement the technical idea of the present invention. There will be. In addition, in describing the present invention, when it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Currently, the maximum transmission rate that can be supported in the 1x-EVDO network reverse channel (the channel transmitted from the wireless communication terminal to the base station) is 153.6 Kbps and theoretically can be up to 614.4 Kbps. Packet configuration of wireless data communication is implemented with a data rate and a reverse rate indicator (RRI) symbol in the reverse channel. Binary 101 can be used as an RRI symbol at 153.6 Kbps transmission rate, and binary 111 can be used as an RRI symbol at 614.4 Kbps transmission rate.

3 is a configuration diagram of an embodiment of a wireless communication terminal according to the present invention. As shown in FIG. 3, the wireless communication terminal according to the present invention further includes a second transmitter.

The second transmitting end receives a digital signal from the MSM 205 and converts the second RF conversion frequency up-converter (RFT6100, hereinafter referred to as “second RFT6100”, 210) to convert the digital signal into an analog RF signal. A band pass filter (BPF) 212 for band filtering, an amplifier 213 for amplifying the filtered analog RF signal, and a second band pass filter for filtering ambient noise in the amplified analog RF signal 214, and a voltage controlled oscillator 211 for providing an oscillation frequency to the second RFT6100 210.

Referring to the operation of the wireless communication terminal according to the present invention shown in Figure 3 in detail as follows.

First, when the receiver is described, the analog RF signal received through the antenna is input to the low noise amplifier 202 through the duplexer 201, amplified, and then filtered by the bandpass filter 203 to convert the baseband converted frequency down converter 204). &Quot; RFR6000 " The analog RF signal input to the RFR6000 204 is converted into a digital signal by an analog-to-digital converter inside the RFR6000 204, and then converted into I / Q data of impedance real and imaginary number, and the converted data is transferred to the MSM 205. Is entered. At this time, the RFR6000 204 mixes the filtered analog RF signal and a local signal input from the voltage controlled oscillator 209 to convert the RF signal into a baseband signal through an IF band. The MSM 205 then processes the baseband signal into data and stores it.

Meanwhile, referring to the transmitter (second transmitter) according to the present invention, the digital signal output from the MSM 205 is input to the second TFT6100 210, and the input digital signal is digital-analog inside the second TFT6100 210. The converter converts an analog signal. The converted analog signal is filtered by the bandpass filter 212 and then amplified by the amplifier 213, and the amplified signal is once again filtered by the bandpass filter 214 and transmitted through the antenna.

The receiving end and the first transmitting end share one voltage controlled oscillator 209. That is, the local signal output from the voltage controlled oscillator 209 is input to the first RFT6100 206 via the RFR6000 204 of the receiver, and the first RFT6100 206 feeds the signal back to the voltage controlled oscillator 209. .

However, the transmitter (second transmitter) according to the present invention includes a separate voltage controlled oscillator 211, and the second TFT 6100 (210) receives the baseband signal received from the MSM (205) from the voltage controlled oscillator (211) Mix with the input local signal and convert to RF signal.

The wireless communication terminal according to the present invention shown in FIG. 3 can transmit data using the second transmitter even during a call through the first transmitter. The analog data transmission method using the second transmitter can efficiently transmit data using the IMT-2000 frequency band and additional bands (1710-1885 MHz, 2500-2690 MHz).

The present invention described above is capable of various substitutions, modifications, and changes without departing from the technical spirit of the present invention for those skilled in the art to which the present invention pertains. It is not limited by the drawings.

The present invention as described above has the effect of providing data quality improvement in the weak field and transmission rate improvement in the same field when transmitting the same data in the reverse channel at the same rate.

In addition, the present invention has the effect of enabling data transmission even after the call is connected.

Claims (2)

A wireless communication terminal including a second transmitter for use for data transmission only, The second transmitter is, An RF conversion frequency upconverter for converting the baseband signal output from the control unit into an analog signal and upconverting the frequency into an RF signal; A first bandpass filter for filtering the frequency upconverted analog RF signal; An amplifier for amplifying the filtered RF signal; A second bandpass filter for filtering the amplified RF signal; And Voltage controlled oscillator for providing a local signal for driving the RF conversion frequency upconverter to the RF conversion frequency upconverter Wireless communication terminal comprising a. The method of claim 1, The RF conversion frequency up converter, The baseband signal output from the control unit is converted into an analog signal through a digital-to-analog converter, and the converted analog signal is mixed with a local signal input from the voltage controlled oscillator and converted into an RF signal. .

Images