CN103117768B - Wireless transceiver - Google Patents

Abstract

The invention discloses a wireless transceiver device, comprising: a transceiver antenna whose working frequency band covers at least 5725-5850MHZ frequency band and a transceiver selection switch, the transceiver antenna is connected with the transceiver selection switch; A receiving module for radio frequency signals in the 5850MHZ frequency band; a digital signal processing module whose input terminal is connected to the output terminal of the receiving module; an input terminal connected to the output terminal of the digital signal processing module and used to convert the signal output by the digital signal processing module into A transmitting module for radio frequency signals in the 5725-5850MHZ frequency band; a frequency synthesizer that is connected to the receiving module and the outgoing end of the transmitting module and provides local oscillator signals for the receiving module and the transmitting module. The wireless transceiver device can realize signal reception and propagation in the 5725-5850MHZ frequency band, and improves the data transmission rate of the wireless communication.

Description

A wireless transceiver device

technical field

The present invention relates to the technical field of broadband wireless access, and more specifically relates to a wireless transceiver device.

Background technique

With the development of wireless communication technology, the application range of Broadband Wireless Access (BWA, Broadband Wireless Access) technology is also becoming wider and wider. Broadband wireless access technology is a combination of broadband network and wireless mobile communication technology. It applies efficient wireless technology to broadband access network and provides users with broadband access technology wirelessly.

According to the coverage of wireless communication, broadband wireless access technology can be divided into wireless personal area network WPAN, wireless local area network WLAN, wireless metropolitan area network WMAN and wireless wide area network WWAN. Among them, WPAN and WLAN are only suitable for short-distance data transmission, and cannot meet the needs of large-capacity data transmission, such as ZigBee technology based on WPAN technology, the effective transmission distance of short-distance wireless communication technology based on ZigBee technology is generally 10-75 meters between, and its transmission rate is relatively low. However, although the wireless communication technology applied to WMAN and WLAN can realize long-distance data transmission, the transmission rate is relatively low, which cannot meet high-speed data transmission.

Therefore, a technical problem urgently needed to be solved by those skilled in the art is how to increase the transmission rate of large-capacity data on the premise of ensuring the transmission distance.

Contents of the invention

In view of this, the present invention provides a wireless transceiver device, which can improve the transmission rate of large-capacity input by using the wireless transceiver device for wireless communication.

In order to achieve the above object, the present invention provides the following technical solutions: a wireless transceiver, comprising: a transceiver antenna and a transceiver selection switch whose working frequency band covers at least the 5725-5850MHZ frequency band, and the transceiver antenna is connected to the transceiver selection switch;

A receiving module for receiving radio frequency signals in the 5725-5850MHZ frequency band received by the transceiver antenna through the transceiver selector switch, the input end of the receiver module is connected to the transceiver selector switch;

a digital signal processing module whose input terminal is connected to the output terminal of the receiving module;

The input terminal is connected to the output terminal of the digital signal processing module, and is used to convert the signal output by the digital signal processing module into a transmitting module of a radio frequency signal in the 5725-5850MHZ frequency band, and the output terminal of the transmitting module is connected to the said transmitting module. The transceiver selection switch is connected;

A frequency synthesizer that is connected to the outlets of the receiving module and the transmitting module and provides local oscillator signals for the receiving module and the transmitting module.

Preferably, the receiving module includes:

A radio frequency signal preprocessing module whose input terminal is connected to the transceiver selection switch;

A quadrature down-conversion mixer whose RF signal input terminal is connected to the output terminal of the radio frequency signal preprocessing module, the local oscillator signal input terminal of the quadrature down-conversion mixer serves as the lead-out terminal of the receiving module and The frequency synthesizer is connected, and the quadrature down-conversion mixer performs quadrature down-conversion mixing on the radio frequency signal of the 5725-5850MHZ frequency band and the local oscillator signal provided by the frequency synthesizer, and from the two The output terminal outputs an analog baseband signal with a frequency band of 0-62.5MHZ;

Two analog-to-digital processing branches respectively connected to the two output terminals of the quadrature down-conversion mixer, the analog-to-digital processing branches filter the analog baseband signal of 0-62.5MHZ, and filter The analog baseband signal is then converted into a digital signal and output to the digital signal processing module.

Preferably, the digital signal processing module converts the two input digital signals into digital baseband signals, and inputs the two digital baseband signals to the transmitting module through its two output terminals respectively;

The transmitting module includes:

Two digital-analog processing branches, the input ends of the digital-analog processing branches are connected to the output ends of the digital signal processing module;

The two baseband signal input terminals are respectively connected to the output terminals of the two digital-analog processing branches, and receive the quadrature up-conversion frequency mixing of the analog baseband signals with a frequency band of 0-62.5MHZ converted by the digital-analog processing branches The local oscillator signal input terminal of the quadrature up-conversion frequency mixer is connected to the frequency synthesizer as the lead-out terminal of the transmitting module, and the quadrature up-conversion frequency mixer connects the two frequency bands Provide the local oscillator signal for the analog baseband signal of 0-62.5MHZ and the frequency synthesizer to perform up-conversion mixing;

The input end is connected to the output end of the quadrature up-conversion mixer, and the radio frequency signal output processing module processes the mixed radio frequency signal output by the quadrature up-conversion mixer.

Preferably, the radio frequency signal preprocessing module includes:

The working frequency band covers at least the 5725-5850MHZ frequency band, and a low-noise amplifier for amplifying the radio frequency signal of the 5725-5850MHZ frequency band received by the transceiver antenna, the input end of the low-noise amplifier is connected to one end of the transceiver selection switch;

The input end is connected to the output end of the low noise amplifier, and the first radio frequency bandpass filter has a center frequency of 5787.5MHZ and a bandwidth of 125MHZ.

Preferably, the modulus processing branch includes:

a first low-pass filter whose input end is connected to an output end of the quadrature down-conversion mixer, and an output end of the first low-pass filter is connected to an input end of a first variable gain amplifier;

The output end of the first variable gain amplifier is connected to the input end of the analog-to-digital converter, and the output end of the analog-to-digital converter is connected to an input end of the digital signal processing module.

Preferably, the digital-analog processing branch includes:

a digital-to-analog converter whose input is connected to an output of said digital signal processing module;

a second variable gain amplifier whose input is connected to the output of said digital-to-analog converter;

A second low-pass filter whose input end is connected to the output end of the second variable gain amplifier, the output end of the second low-pass filter is connected to a baseband signal input end of the quadrature up-conversion mixer connected.

Preferably, the radio frequency signal output processing module includes:

The input terminal is connected to the output terminal of the quadrature up-conversion mixer, and a second radio frequency bandpass filter with a center frequency of 5787.5MHZ and a bandwidth of 125MHZ;

The input terminal is connected to the output terminal of the second radio frequency bandpass filter, and the working frequency band covers at least 5725-5850MHZ frequency band of the power amplifier, and the output terminal of the power amplifier is connected to the transceiver selection switch.

Preferably, the transceiver device further includes: a radio frequency synthesizer;

The radio frequency signal preprocessing module includes:

The working frequency band covers at least the 5725-5850MHZ frequency band, and a low-noise amplifier for amplifying the radio frequency signal of the 5725-5850MHZ frequency band received by the transceiver antenna, the input end of the low-noise amplifier is connected to one end of the transceiver selection switch;

The input terminal is connected to the output terminal of the low noise amplifier, and the center frequency is 5787.5MHZ, and the bandwidth is the first radio frequency bandpass filter of 125MHZ;

A radio frequency down-conversion mixer whose first input terminal is connected to the output terminal of the first radio frequency bandpass filter, and a second input terminal of the radio frequency down conversion mixer is connected to the output terminal of the radio frequency frequency synthesizer ;

a first intermediate frequency variable gain amplifier whose input end is connected to the output end of the radio frequency down-conversion mixer;

A first intermediate frequency bandpass filter whose input terminal is connected to the output terminal of the intermediate frequency variable gain amplifier, and whose output terminal is connected to the input terminal of the quadrature down-conversion mixer.

Preferably, the radio frequency signal output processing module includes:

A second intermediate frequency bandpass filter whose input terminal is connected to the output terminal of the quadrature up-conversion mixer;

a second intermediate frequency variable gain filter whose input end is connected to the second intermediate frequency bandpass filter;

A radio frequency up-conversion mixer whose first input terminal is connected to the second intermediate frequency variable gain filter, and a second input terminal of the radio frequency up-conversion mixer is connected to the output terminal of the radio frequency frequency synthesizer;

The input terminal is connected to the output terminal of the radio frequency up-conversion mixer, and the center frequency is 5787.5MHZ, and the bandwidth is a second radio frequency bandpass filter of 125MHZ;

The input terminal is connected to the output terminal of the second radio frequency bandpass filter, and the working frequency band covers at least 5725-5850MHZ frequency band of the power amplifier, and the output terminal of the power amplifier is connected to the transceiver selection switch.

Preferably, the frequency synthesizer provides local oscillator signals of 5787.5MHZ for the receiving module and the transmitting module.

It can be seen from the above technical solutions that, compared with the prior art, the present invention discloses a wireless transceiver device, which can receive radio frequency signals in the 5725MHZ-5850MHZ frequency band, and process the radio frequency signals in the frequency band Submitted to the digital signal processing module for processing, and the generated radio frequency signal can be transmitted through the antenna in the 5725MHZ ~ 5850MHZ frequency band, so that data transmission can be performed in this frequency band, which can ensure the data transmission distance and achieve a higher transmission rate, thus It realizes a higher transmission rate under the premise of ensuring the transmission distance.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only It is an embodiment of the present invention, and those skilled in the art can also obtain other drawings according to the provided drawings without creative work.

Fig. 1 shows a schematic structural diagram of an embodiment of a wireless transceiver device of the present invention;

Fig. 2 shows a schematic structural diagram of another embodiment of a wireless transceiver device according to the present invention.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

The embodiment of the present invention discloses a wireless transceiver. The wireless transceiver includes: a transceiver antenna and a transceiver selection switch whose working frequency band covers at least 5725MHZ-5850MHZ. The transceiver antenna is connected to the transceiver selection switch; through the transceiver selection switch The receiving module that receives the radio frequency signal of the 5725-5850MHZ frequency band received by the transceiver antenna, the input terminal of the receiving module is connected to the transceiver selection switch; the digital signal processing module whose input terminal is connected to the output terminal of the receiving module; the input terminal Connected with the output terminal of the digital signal processing module, and used to convert the signal output by the digital signal processing module into a transmitting module of a radio frequency signal in the 5725-5850MHZ frequency band, the output terminal of the transmitting module is connected with the transceiver selection switch; A frequency synthesizer connected to the outlets of the receiving module and the transmitting module, the frequency synthesizer provides local oscillator signals for the receiving module and the transmitting module. The wireless transceiver device of the present invention can receive radio frequency signals in the 5725MHZ～5850MHZ frequency band, and submit the radio frequency signals in the frequency band to the digital signal processing module for processing after processing, and the generated radio frequency signals can pass through the antenna in the 5725MHZ～5850MHZ frequency band According to the data transmission index in the 5725MHZ ~ 5850MHZ frequency band stipulated by the state, it can be known that when data transmission is performed in this frequency band, a higher transmission rate can be achieved under the premise of ensuring the transmission distance.

The wireless transceiver device of the present invention will be described in detail below with reference to the accompanying drawings.

Referring to Fig. 1 , it shows a schematic structural diagram of an embodiment of this wireless transceiver device of the present invention. In this embodiment, the wireless transceiver device includes: a transceiver antenna 1, a transceiver selection switch 2, a receiving module 3, and a transmitting module 4 , a frequency synthesizer 5 and a digital signal processing module 6.

Wherein, the working frequency band of the transceiver antenna 1 at least covers the frequency band of 5725MHZ-5850MHZ.

The transceiver antenna is connected to one end of the transceiver selection switch 2 , and the other end of the transceiver selection switch 2 is connected to the output terminal of the receiving module 3 and the input terminal of the transmitting module 4 . The transceiver selection switch is used to switch between the receiving module and the transmitting module. By setting the switching between the selection switch and the circuit between the receiving module and the transmitting module, the receiving module can be controlled to receive radio frequency signals, or the transmitting module can be controlled to transmit externally. RF signal.

Both the outgoing end of the receiving module 3 and the outgoing end of the transmitting module are connected to a frequency synthesizer 5, and the frequency synthesizer provides local oscillator signals for the receiving module and the transmitting module.

Among them, the receiving module receives radio frequency signals in the frequency range of 5725MHZ to 5850MHZ through the transceiver antenna, and processes the radio frequency signals in the frequency range of 5725MHZ to 5850MHZ to generate analog baseband signals, and converts the analog baseband signals into digital signals and sends them to digital signal handlers.

The transmitting module converts the digital signal output by the digital signal processing module into a radio frequency signal suitable for propagation in the 5725-5850MHZ frequency band.

The wireless transceiver device of the present invention is based on the 5.8GHZ frequency band, adopts the open frequency band of 5725MHZ～5850MHZ to receive and transmit radio frequency signals, and has a communication bandwidth of 125MHZ. It can reach 1000m, and the transmission rate can reach 250mbps, which realizes the improvement of the transmission rate under the premise of meeting a certain transmission distance.

In the present invention, the receiving module 3 may include: a radio frequency signal preprocessing module 310, a quadrature down-conversion mixer 320, and two analog-to-digital processing branches 330 respectively connected to two output ends of the mixer.

Wherein, the input end of the RF signal preprocessing module 310 is connected to the transceiver selection switch 2 , and its output end is connected to the RF signal input end of the quadrature down-conversion mixer 320 . After the radio frequency signal preprocessing module preprocesses the received radio frequency signal in the 5725MHZ～5850MHZ frequency band, it outputs the preprocessed radio frequency signal in the 5725MHZ～5850MHZ frequency band to the quadrature down-conversion mixer.

The quadrature down-conversion mixer 320 includes a radio frequency signal input terminal, a local oscillator signal input terminal and two output terminals, and the local oscillator signal input terminal of the quadrature down-conversion mixer serves as the lead-out terminal of the receiving module and The frequency synthesizer 5 is connected. The local oscillator signal output by the frequency synthesizer 5 is input into the quadrature down-conversion mixer. The quadrature down-conversion mixer performs quadrature down-conversion mixing on the RF signal of the 5725-5850MHZ frequency band processed by the RF signal preprocessing module and the local oscillator signal provided by the frequency synthesizer to obtain two frequency bands of 0-62.5MHZ (ie, DC to 62.5MHZ) analog baseband signals, and output the obtained two analog baseband signals to the two analog-to-digital processing branches 330 from their two output terminals respectively.

The two analog-to-digital processing branches 330 are respectively connected to the two output terminals of the quadrature up-conversion mixer. Each analog-to-digital processing branch performs filtering and other processing on the 0-62.5MHZ analog baseband signal output by the quadrature up-conversion mixer, and converts the filtered analog baseband signal into a digital signal and outputs it to the digital signal processing module.

Correspondingly, after receiving the analog baseband signals input by the two analog-to-digital processing branches, the digital signal processing module 6 processes and converts the two analog baseband signals into digital baseband signals, and separates the two digital baseband signals into digital baseband signals. It is input into the transmitter module through its two output terminals.

Wherein, the transmitting module has two input terminals, and the two input terminals of the transmitting module are respectively connected with the two output terminals of the digital processing module.

Specifically, the transmitting module may include: two digital-to-analog processing branches 410 , a quadrature up-conversion mixer 420 and a radio frequency signal output processing module 430 .

Wherein, the input terminals of the two digital-analog processing branches 410 are respectively connected to the two output terminals of the digital signal processing module. The digital-analog processing branch is used to receive the digital baseband signal output from the digital signal processing module, convert the digital baseband signal into an analog baseband signal with a frequency range of 0-62.5MHZ, and input the converted analog baseband signal to the quadrature in the upconversion mixer. Specifically, the digital-to-analog processing branch converts the digital baseband signal into an analog baseband signal, and performs operations such as gain amplification and filtering on the analog baseband signal.

The quadrature up-conversion mixer 420 has two baseband signal input terminals, a local oscillator signal input terminal and an output terminal. The two baseband signal input terminals of the quadrature up-conversion mixer are respectively connected to the output terminals of the two digital-analog processing branches, and receive the analog baseband signals converted by the digital-analog processing branches with a frequency band of 0-62.5MHZ . The local oscillator signal input terminal of the quadrature up-conversion frequency mixer is connected to the frequency synthesizer as the lead-out terminal of the transmitting module, and the local oscillator signal generated by the frequency synthesizer is input to the quadrature through the local oscillator signal input terminal. in the upconversion mixer. The quadrature up-conversion mixer performs up-conversion and mixing of the analog baseband signal with a frequency range of 0-62.5MHZ input from the two baseband signal input terminals and the local oscillator signal input from the local oscillator signal input terminal to generate 5725-5850MHZ frequency band The radio frequency signal is output to the radio frequency signal output processing module.

The input end of the RF signal output processing module 430 is connected to the output end of the quadrature up-conversion mixer, and the RF signal output processing module outputs the RF signal in the 5725-5850MHZ frequency band output by the quadrature up-conversion mixer. deal with. For example, the radio frequency signal output processing module can perform power amplification, filtering and other operations on the radio frequency signal in the 5725-5850 MHZ frequency band output by the quadrature up-conversion mixer.

In practical applications, according to different application scenarios, the specific composition of the receiving module and the transmitting module in the wireless transceiver device may also be different.

The wireless transceiver device in the embodiment shown in Fig. 1 can satisfy the condition that there is no DC offset or reduce the DC offset, in this case, the local oscillator signal provided by the frequency synthesizer for the receiving module and the transmitting module in this embodiment is: 5787.5MHZ local oscillator signal.

In this embodiment, the receiving module 3 includes: a radio frequency signal preprocessing module 310 , a quadrature up-conversion mixer 320 and two analog-to-digital processing branches 330 .

Specifically, the radio frequency signal preprocessing module 310 may include: the working frequency band covers at least the 5725-5850MHZ frequency band, and a low-noise amplifier 311 for amplifying the radio frequency signal received by the transceiver antenna in the 5725-5850MHZ frequency band and a center frequency of 5787.5MHZ, A first radio frequency bandpass filter 312 with a bandwidth of 125 MHz.

Wherein, the input terminal of the low noise amplifier 311 is connected with one end of the transceiver selection switch, when the transceiver selection switch is in the conducting state, the low noise amplifier can receive the radio frequency signal of the 5725-5850MHZ frequency band received by the transceiver antenna, and The RF signal is amplified and the introduced noise is reduced to improve the signal-to-noise ratio of the signal.

The output end of this low noise amplifier 311 is connected with the input end of this first radio frequency bandpass filter 312. And then this low noise amplifier 311 inputs the radio frequency signal in the 5725～5850MHZ frequency band after amplifying to this first radio frequency bandpass filter device 312. The center frequency of the first radio frequency bandpass filter 312 is 5787.5MHZ and the bandwidth is 125MHZ, so the input radio frequency signal can be filtered to filter out the interference signals outside the frequency band of 5725-5850MHZ.

The output end of the first RF bandpass filter 312 is connected to the RF signal input end of the quadrature up-conversion mixer 32 . The quadrature down-conversion mixer 320 performs quadrature down-conversion mixing on the radio frequency signal input from the radio frequency signal input terminal and the 5787.5 MHZ local oscillator signal provided by the frequency synthesizer to generate two low-frequency analog baseband signals. The frequency band of the analog baseband signal is 0 ~ 62.5MHZ, that is, DC ~ 62.5MHZ. Wherein, after the quadrature down-conversion mixer receives the local oscillator signal input from the frequency synthesizer, the local oscillator signal is divided into two channels, and one channel is subjected to 90-degree phase-shift processing and then down-converts and mixes with the input radio frequency signal. The other local oscillator signal is directly down-converted and mixed with the radio frequency signal to generate two analog baseband signals of in-phase and quadrature, that is, two analog baseband signals of I and Q.

The I and Q analog baseband signals generated by the quadrature up-conversion mixer are respectively input into the two analog-to-digital processing branches 330 . In this embodiment, each analog-to-digital processing branch 330 may include: a first low-pass filter 331 , a first variable gain amplifier 332 and an analog-to-digital converter 333 .

An input end of the first low-pass filter 331 is connected to an output end of the quadrature down-conversion mixer for receiving one analog baseband signal output by the quadrature down-conversion mixer 320 .

The output terminal of the first low-pass filter 331 is connected with the input terminal of the first variable gain amplifier 332, and the output terminal of the first variable gain amplifier 332 is connected with the input terminal of the analog-to-digital converter 333, the An output terminal of the analog-to-digital converter is connected to an input terminal of the digital signal processing module 6 .

Wherein, the passband of the first low-pass filter is 0-62.5MHZ, and is used for filtering the mixed analog baseband signal to filter out out-of-band signals.

The bandwidth of the first variable gain amplifier at least covers the 0-62.5MHZ frequency band, and is used to amplify the filtered analog baseband signal to meet the requirement of the input level of the analog-to-digital converter. The first variable gain amplifier can adjust the amplification gain according to the strength of the received signal.

The analog-to-digital converter converts the filtered and amplified analog baseband signal into a digital signal, so as to provide the digital signal processing module for digital signal processing.

Correspondingly, in order to realize transmission and propagation of radio frequency signals by utilizing the 5725-5850 MHz frequency band, the digital signal processing module inputs the digital baseband signal output by it to the receiving module. In this embodiment, the digital processing module simultaneously outputs two digital baseband signals, ie I and Q digital baseband signals, and these two digital baseband signals are respectively input into two digital-analog processing branches of the receiving module. Specifically, the transmitting module 4 includes: two digital-to-analog processing branches 410 , a quadrature up-conversion mixer 420 and a radio frequency signal output processing module 430 . In this embodiment, each digital-to-analog processing branch 410 includes: a digital-to-analog converter 411 , a second variable gain amplifier 412 and a second low-pass filter 413 .

The input end of this digital-analog converter 411 is connected with an output end of this digital signal processor 6, and the output end of this digital-analog converter 411 is connected with the input end of this second variable gain amplifier 412; The output terminal of the variable gain amplifier 412 is connected to the input terminal of the second low-pass filter 413, and the output terminal of the second low-pass filter is connected to an input terminal of the quadrature up-conversion mixer.

Wherein, the digital-to-analog converter 411 is used to convert the digital baseband signal output by the digital signal processing module into an analog baseband signal.

The working bandwidth of the second variable gain amplifier covers at least 0-62.5MHZ, and it amplifies the power of the input analog baseband signal, and adjusts the amplification gain of the analog baseband signal to meet the requirements of the transmitting module for transmitting power.

The passband of the second low-pass filter is 0-62.5MHZ, and it is used to filter the input amplified analog baseband signal to filter out out-of-band signals.

In this embodiment, the two digital baseband signals output by the digital signal processing module are input to the quadrature up-conversion mixer after being processed by various components in the digital-to-analog processing branch.

The quadrature up-conversion mixer 420 performs quadrature up-conversion mixing on the input I and Q two-way analog baseband signals and the 5787.5MHZ local oscillator signal provided by the frequency synthesizer 5 to generate radio frequency signals in the 5725MHZ～5850MHZ frequency band, and output to the radio frequency signal output processing module 430.

In this embodiment, the radio frequency signal output processing module 430 specifically includes: a second radio frequency bandpass filter 431 and a power amplifier 432 .

The input end of the second radio frequency bandpass filter is connected with the output end of the quadrature up-conversion mixer, the output end is connected with the input end of the power amplifier, and the output end of the power amplifier is connected with the transceiver selection switch.

Wherein, the center frequency of the second radio frequency bandpass filter is 5787.5MHZ, and the bandwidth is 125MHZ, which is used for filtering the radio frequency signal in the 5725MHZ～5850MHZ frequency band output by the quadrature up-conversion mixer to filter out the Interference signals outside the 5850MHZ frequency band.

The working frequency band of the power amplifier covers at least the 5725-5850MHZ frequency band, and is used for power amplifying the filtered radio frequency signal of the 5725-5850MHZ frequency band, so as to meet the requirement of transmission power.

In order to reduce the problem of image suppression, the present invention also provides a wireless transceiver device. Referring to FIG. 2, a schematic structural diagram of another embodiment of a wireless transceiver device of the present invention is shown. This embodiment is the same as that of the embodiment shown in FIG. 1 The difference is:

In this embodiment, the wireless transceiver device further includes a radio frequency synthesizer 7, and the radio frequency synthesizer provides radio frequency local oscillator signals for the receiving module and the transmitting module.

Correspondingly, in this embodiment, the frequency synthesizer 5 may be an intermediate frequency frequency synthesizer, which provides intermediate frequency local oscillator signals for the receiving module and the transmitting module. Among them, the frequency band of the intermediate frequency local oscillator signal provided by the frequency synthesizer can be set according to the needs, but it must be ensured that the frequency band of the analog baseband signal converted by the receiving module is 0 ~ 62.5MHZ, and the frequency band of the radio frequency signal converted by the transmitting module must be ensured. The frequency band is 5725-5850MHZ.

Correspondingly, in this embodiment, the radio frequency signal preprocessing module 310 connected to the receiving module 3 includes the working frequency band at least covering the 5725～5850MHZ frequency band, and amplifies the radio frequency signal received by the transceiver antenna in the 5725～5850MHZ frequency band In addition to the low noise amplifier 311 of the low noise amplifier 311, and the center frequency is 5787.5MHZ, the bandwidth is the first radio frequency bandpass filter 312 of 125MHZ, it also includes: a radio frequency down-conversion mixer 313, the first intermediate frequency variable gain amplifier 314 and the intermediate frequency band Pass filter 315.

Wherein, the functions of the low noise amplifier 311 and the first radio frequency band-pass filter and their connections are the same as those of the embodiment shown in Figure 2, except that in this embodiment the output of the first radio frequency band-pass filter is connected to the The first input terminal of the down-conversion mixer 313 is connected.

The RF down-conversion mixer 313 has two input terminals, the first input terminal of which is connected to the output terminal of the first RF bandpass filter, and the second input terminal of which is connected to the output terminal of the RF frequency synthesizer. The radio frequency down-conversion mixer is used for down-conversion mixing the amplified and filtered radio frequency signal input to the first input terminal and the radio frequency local oscillator signal input by the radio frequency frequency synthesizer to generate a signal with an intermediate frequency bandwidth of 125MHZ.

The output end of the RF down-conversion mixer 313 is connected to the input end of the first intermediate frequency variable gain amplifier 314, and the output end of the first intermediate frequency variable gain amplifier 314 is connected to the input end of the intermediate frequency bandpass filter 315. The output end of the IF bandpass filter 315 is connected to the input end of the quadrature down-conversion mixer 320 .

Wherein, the operating bandwidth of the first intermediate frequency variable gain amplifier is at least 125MHZ, which is used to amplify the signal with an intermediate frequency bandwidth of 125MHZ output by the RF down-conversion mixer, so as to meet the requirements of the input level of the analog-to-digital converter .

The passband bandwidth of the intermediate frequency bandpass filter is 125MHZ, and is used to filter the signal with the intermediate frequency bandwidth of 125MHZ, so as to filter out out-of-band signals.

In this embodiment, the quadrature down-conversion mixer 320 can actually be understood as an intermediate frequency quadrature down-conversion mixer, which is used for signals with an intermediate frequency bandwidth of 125 MHz obtained after filtering, amplification, and intermediate frequency mixing. Perform quadrature down-conversion frequency mixing with the intermediate frequency local oscillator signal provided by the frequency synthesizer 5, and output I and Q analog baseband signals with frequency bands of 0-62.5MHZ.

Correspondingly, the difference between one end of the transmitting module and the embodiment shown in FIG. 2 is:

The quadrature up-conversion mixer in the transmitter module performs quadrature up-conversion mixing on the input I and Q analog baseband signals in the 0-62.5MHZ frequency band and the intermediate frequency local oscillator signal provided by the frequency synthesizer to generate the intermediate frequency A signal with a bandwidth of 125MHZ.

Further, the radio frequency signal output processing module 430 in the transmitting module includes a second radio frequency bandpass filter 431 with a center frequency of 5787.5MHZ and a bandwidth of 125MHZ and a power amplifier 432 whose working frequency covers at least the frequency band of 5725～5850MHZ. It includes: a second intermediate frequency bandpass filter 433 , a second intermediate frequency variable gain filter 434 and a radio frequency up-conversion mixer 435 .

In this embodiment, the input terminal of the second intermediate frequency bandpass filter 431 is connected to the output terminal of the quadrature up-conversion mixer, and is used for filtering the mixed signal output by the quadrature up-conversion mixer . The passband bandwidth of the second intermediate frequency bandpass filter is 125MHZ.

The input end of the second intermediate frequency variable gain filter 434 is connected to the output end of the second intermediate frequency bandpass filter 431, and the output end of the second intermediate frequency variable gain filter is connected to the radio frequency up-conversion mixer 435 connected to the first input. The working bandwidth of the second intermediate frequency variable gain filter is at least 125NHZ, and it adjusts the amplification gain of the input signal whose intermediate frequency bandwidth is 125MHZ according to the power of the transmitted signal.

The second input terminal of the RF up-conversion mixer is connected with the RF frequency synthesizer, and the RF frequency synthesizer combines the signal with the bandwidth of the intermediate frequency input by the first input terminal as 125MHZ with the RF local oscillator provided by the RF frequency synthesizer The signal is up-converted and mixed to generate a radio frequency signal in the 5725-5850MHZ frequency band.

The output end of the radio frequency up-conversion mixer is connected with the input end of the second radio frequency bandpass filter 431, and the output end of the second radio frequency bandpass filter 431 is connected with the input end of the power amplifier 432, the power The output terminal of the amplifier is connected with the transceiver selection switch 2 .

Each embodiment in this specification is described in a progressive manner, each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment can be referred to each other.

The above description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (5)

1. A wireless transceiving device, which is applied to a broadband access network, is characterized in that it comprises: a transceiving antenna and a transceiving selection switch whose working frequency band covers at least the 5725-5850MHZ frequency band, and the transceiving antenna is connected to the transceiving selection switch; A receiving module for receiving radio frequency signals in the 5725-5850MHZ frequency band received by the transceiver antenna through the transceiver selector switch, the input end of the receiver module is connected to the transceiver selector switch; a digital signal processing module whose input terminal is connected to the output terminal of the receiving module; The input terminal is connected to the output terminal of the digital signal processing module, and is used to convert the signal output by the digital signal processing module into a transmitting module of a radio frequency signal in the 5725-5850MHZ frequency band, and the output terminal of the transmitting module is connected to the said transmitting module. The transceiver selection switch is connected; A frequency synthesizer that is connected to the outlets of the receiving module and the transmitting module and provides local oscillator signals for the receiving module and the transmitting module; Wherein, the receiving module includes: A radio frequency signal preprocessing module whose input terminal is connected to the transceiver selection switch; A quadrature down-conversion mixer whose RF signal input terminal is connected to the output terminal of the radio frequency signal preprocessing module, the local oscillator signal input terminal of the quadrature down-conversion mixer serves as the lead-out terminal of the receiving module and The frequency synthesizer is connected, and the quadrature down-conversion mixer performs quadrature down-conversion mixing on the radio frequency signal of the 5725-5850MHZ frequency band and the local oscillator signal provided by the frequency synthesizer, and from the two The output terminal outputs an analog baseband signal with a frequency band of 0-62.5MHZ; Two analog-to-digital processing branches respectively connected to the two output terminals of the quadrature down-conversion mixer, the analog-to-digital processing branches filter the analog baseband signal of 0-62.5MHZ, and filter After the analog baseband signal is converted into a digital signal and output to the digital signal processing module; The transceiver device also includes: a radio frequency synthesizer; The radio frequency signal preprocessing module includes: The working frequency band covers at least the 5725-5850MHZ frequency band, and a low-noise amplifier for amplifying the radio frequency signal of the 5725-5850MHZ frequency band received by the transceiver antenna, the input end of the low-noise amplifier is connected to one end of the transceiver selection switch; The input terminal is connected to the output terminal of the low noise amplifier, and the center frequency is 5787.5MHZ, and the bandwidth is the first radio frequency bandpass filter of 125MHZ; A radio frequency down-conversion mixer whose first input terminal is connected to the output terminal of the first radio frequency bandpass filter, and a second input terminal of the radio frequency down conversion mixer is connected to the output terminal of the radio frequency frequency synthesizer ; a first intermediate frequency variable gain amplifier whose input end is connected to the output end of the radio frequency down-conversion mixer; A first intermediate frequency band-pass filter whose input end is connected to the output end of the intermediate frequency variable gain amplifier, and whose output end is connected to the input end of the quadrature down-conversion mixer; The radio frequency signal output processing module includes: A second intermediate frequency bandpass filter whose input terminal is connected to the output terminal of the quadrature up-conversion mixer; a second intermediate frequency variable gain filter whose input end is connected to the second intermediate frequency bandpass filter; A radio frequency up-conversion mixer whose first input terminal is connected to the second intermediate frequency variable gain filter, and a second input terminal of the radio frequency up-conversion mixer is connected to the output terminal of the radio frequency frequency synthesizer; The input terminal is connected to the output terminal of the radio frequency up-conversion mixer, and the center frequency is 5787.5MHZ, and the bandwidth is a second radio frequency bandpass filter of 125MHZ; The input terminal is connected to the output terminal of the second radio frequency bandpass filter, and the working frequency band covers at least 5725-5850MHZ frequency band of the power amplifier, and the output terminal of the power amplifier is connected to the transceiver selection switch. 2. The transceiver device according to claim 1, wherein the digital signal processing module converts the input two-way digital signal into a digital baseband signal, and passes the two-way digital baseband signal through its two output channels respectively. The terminal is input to the transmitting module; The transmitting module includes: Two digital-analog processing branches, the input ends of the digital-analog processing branches are connected to the output ends of the digital signal processing module; The two baseband signal input terminals are respectively connected to the output terminals of the two digital-analog processing branches, and receive the quadrature up-conversion frequency mixing of the analog baseband signals with a frequency band of 0-62.5MHZ converted by the digital-analog processing branches The local oscillator signal input terminal of the quadrature up-conversion frequency mixer is connected to the frequency synthesizer as the lead-out terminal of the transmitting module, and the quadrature up-conversion frequency mixer connects the two frequency bands Provide the local oscillator signal for the analog baseband signal of 0-62.5MHZ and the frequency synthesizer to perform up-conversion mixing; The input end is connected to the output end of the quadrature up-conversion mixer, and the radio frequency signal output processing module processes the mixed radio frequency signal output by the quadrature up-conversion mixer. 3. The transceiver device according to claim 1 or 2, wherein the analog-to-digital processing branch comprises: a first low-pass filter whose input end is connected to an output end of the quadrature down-conversion mixer, and an output end of the first low-pass filter is connected to an input end of a first variable gain amplifier; The output end of the first variable gain amplifier is connected to the input end of the analog-to-digital converter, and the output end of the analog-to-digital converter is connected to an input end of the digital signal processing module. 4. The transceiver device according to claim 2, wherein the digital-analog processing branch comprises: a digital-to-analog converter whose input is connected to an output of said digital signal processing module; a second variable gain amplifier whose input is connected to the output of said digital-to-analog converter; A second low-pass filter whose input end is connected to the output end of the second variable gain amplifier, the output end of the second low-pass filter is connected to a baseband signal input end of the quadrature up-conversion mixer connected. 5. The transceiver device according to claim 1, wherein the frequency synthesizer provides local oscillator signals of 5787.5MHZ for the receiving module and the transmitting module.