CN109257056A - A kind of digital if receiver - Google Patents
A kind of digital if receiver Download PDFInfo
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- CN109257056A CN109257056A CN201811281648.5A CN201811281648A CN109257056A CN 109257056 A CN109257056 A CN 109257056A CN 201811281648 A CN201811281648 A CN 201811281648A CN 109257056 A CN109257056 A CN 109257056A
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- signal
- processing module
- frequency
- module
- digital
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/16—Circuits
Abstract
The invention belongs to ultra-short wave receiver fields, disclose a kind of digital if receiver, comprising: radio frequency processing module, frequency mixer, IF process module, baseband processing module and frequency synthesizer module；Wherein, the input terminal of the radio frequency processing module is electrically connected with the output end of external antenna, the signal output end of the radio frequency processing module obtains rf inputs with the frequency mixer and is electrically connected, the signal output end of the frequency mixer is electrically connected with the signal input part of the IF process module, and the signal output end of the IF process module is electrically connected with the signal input part of the baseband processing module；The local oscillation signal output end of the frequency synthesizer module is electrically connected with the local oscillation signal input terminal of the frequency mixer.
Description
Technical field
The invention belongs to ultra-short wave receiver technical field more particularly to a kind of digital if receivers.
Background technique
Recently as the fast development of software and radio technique, the advantages that its opening, flexibility, increasingly causes
The attention of people, by software and radio technique be linked into various dual-use mobile radio communications obtained in foreign countries it is fast
The development of speed.
Currently, domestic ultra-short wave receiver is using the Super heterodyne principle being mixed twice, volume is big, and structure is complicated, is not easy
In the extension of addition new function and frequency.
Summary of the invention
In view of the above-mentioned problems of the prior art, being adopted the purpose of the present invention is to provide a kind of digital if receiver
With an analog frequency mixing, analog-to-digital conversion, Digital Down Convert and demodulation, extraction and filtering are carried out to obtained intermediate-freuqncy signal and counted
Word baseband signal, to have small in size, light-weight, frequency instead of the analog frequency mixing technology twice of conventional superheterodyne receiver
The advantages that rate easily extends.
In order to achieve the above objectives, the present invention is realised by adopting the following technical scheme.
A kind of digital if receiver, the digital if receiver include: radio frequency processing module, frequency mixer, at intermediate frequency
Manage module, baseband processing module and frequency synthesizer module；
Wherein, the input terminal of the radio frequency processing module is electrically connected with the output end of external antenna, the radio frequency processing mould
The signal output end of block obtains rf inputs with the frequency mixer and is electrically connected, the signal output end of the frequency mixer and it is described in
The signal input part of frequency processing module is electrically connected, signal output end and the baseband processing module of the IF process module
Signal input part electrical connection；
The local oscillation signal output end of the frequency synthesizer module is electrically connected with the local oscillation signal input terminal of the frequency mixer.
The characteristics of technical solution of the present invention and further improvement are as follows:
(1) radio frequency processing module is put for the received radiofrequency signal of external antenna to be amplified and filtered
Big and filtered radiofrequency signal；
The local oscillation signal for generating local oscillation signal, and is sent to the sheet of frequency mixer by the frequency synthesizer module
Shake signal input part；
The frequency mixer, amplification and filtered radiofrequency signal for sending the radio frequency processing module, Yi Jisuo
The local oscillation signal for stating frequency synthesizer module transmission is mixed, and intermediate-freuqncy signal is obtained；
The IF process module, the intermediate-freuqncy signal for obtaining the frequency mixer are amplified and are filtered, and will be obtained
Amplification and filtered intermediate-freuqncy signal be sent to baseband processing module；
The baseband processing module, for the amplification received and filtered intermediate-freuqncy signal carry out analog-to-digital conversion, under
Frequency-conversion processing, demodulation, extraction and filtering obtain digital baseband signal, and are sent to receiver external.
(2) radio frequency processing module includes sequentially connected broadband limiter, radio frequency amplifier and filter
The broadband limiter is used to the received radiofrequency signal of external antenna carrying out power limit, and is sent into radio frequency amplification
Device carries out power amplification, obtains amplified radiofrequency signal, and filter is used to filter out the interference of the amplified radiofrequency signal
Signal.
(3) the IF process module includes sequentially connected first bandpass filter, the first intermediate frequency amplifier, the second band
Bandpass filter and controllable gain amplifier；
First bandpass filter is used to filter out the local oscillation signal and radiofrequency signal of mixer leakage in intermediate-freuqncy signal, the
One intermediate frequency amplifier, which is used to send the signal of amplification output to the second bandpass filter, filters out harmonic wave and spuious, the controllable gain
Amplifier is used to export the intermediate-freuqncy signal after amplifying post filtering to baseband processing module.
The present invention obtains intermediate-freuqncy signal using an analog frequency mixing technology, carries out analog-to-digital conversion, down coversion to intermediate-freuqncy signal
Processing, demodulation are extracted and are filtered, and reduce the volume and weight of receiver, have flexibility and scalability.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is a kind of structural schematic diagram of digital if receiver provided in an embodiment of the present invention；
Fig. 2 is the structural schematic diagram of radio frequency processing module in a kind of digital if receiver provided in an embodiment of the present invention；
Fig. 3 is a kind of structural representation of digital if receiver frequency synthesizer module provided in an embodiment of the present invention
Figure；
Fig. 4 is the structural schematic diagram of IF process module in a kind of digital if receiver provided in an embodiment of the present invention；
Fig. 5 is the structural schematic diagram of baseband processing module in a kind of digital if receiver provided in an embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
It referring to Fig.1, is a kind of structural schematic diagram of digital if receiver provided in an embodiment of the present invention.The digital intermediate frequency
Receiver includes radio frequency processing module, frequency mixer, IF process module, baseband processing module, frequency synthesizer module, power supply mould
Block.
The received radiofrequency signal of antenna is carried out clipping, amplification, is filtered and is sent into penetrating for frequency mixer by radio frequency processing module
Frequency port, frequency synthesizer module generate the local oscillator port that local oscillation signal is sent into frequency mixer, and the two is mixed to obtain intermediate frequency letter
Number.IF process module amplifies intermediate-freuqncy signal, is filtered and send to baseband processing module.Baseband processing module completes mould
Number conversion, lower mixing, demodulation, extraction and filtering obtain baseband signal and are sent to recipient.
With reference to Fig. 2, the structural representation of radio frequency processing module in a kind of digital if receiver provided for inventive embodiments
Figure.Radio frequency processing module includes broadband limiter, radio frequency amplifier and filter, and broadband limiter believes the received radio frequency of antenna
Number power limit is sent into radio frequency amplifier and carries out power amplification.Amplified radiofrequency signal enters filter filtering interference signals.
Wherein, the advantages of broadband limiter used for low insertion loss, output and input intensity isolation, standing-wave ratio it is small.In order to improve
There is the radio frequency amplifier of the receiver linearity, use low noise coefficient, high gain and IIP3 (third order intermodulation index) value to compare
High low noise.The filter used filters out the received noise of antenna and interference for the stronger bounce frequency filter of Out-of-band rejection
Signal.
It is that a kind of structure of the frequency synthesizer module for digital if receiver that inventive embodiments provide is shown with reference to Fig. 3
It is intended to.Standard-frequency signal is sent to frequency divider and divided by crystal oscillator, and the signal after frequency dividing is sent to frequency discrimination mirror
Phase device；The signal of voltage controlled oscillator output is sent to phase frequency detector, phase frequency detector divided device is divided after signal,
The signal of voltage controlled oscillator output carries out phase bit comparison, generates local oscillator phase error signal, local oscillator phase error signal is through charge
It is changed into local oscillator voltage error signal after pump；Local oscillator voltage error signal forms voltage controlled oscillator after loop filter filters
Control voltage signal, the control voltage signal of voltage controlled oscillator change and lock voltage controlled oscillator output signal frequency, so
Afterwards, the output after radio frequency amplifier amplification, low-pass filtering treatment of the signal of voltage controlled oscillator output is required local oscillator letter
Number.
It is a kind of structural representation of the IF process module for digital if receiver that inventive embodiments provide with reference to Fig. 4
Figure.The intermediate-freuqncy signal exported from frequency mixer filters out the local oscillation signal and radiofrequency signal of mixer leakage by bandpass filter 1, send
Amplify to the first intermediate frequency amplifier, the signal of the first intermediate frequency amplifier amplification output, which is sent to bandpass filter 2 is further, to be filtered
Except harmonic wave and spuious, finally send to controllable gain operational amplifier and be output to baseband processing module.
Wherein, the bandpass filter 1 used is small in size for SAW filter, light-weight.First intermediate frequency amplifier is height
The low-noise amplifier of gain.In order to improve the selectivity of receiver, bandpass filter 2 uses the crystal filter of low insertion loss
Device.In order to meet the input dynamic range of rear class baseband processing module, IF process module uses controllable gain amplifier, passes through
The gain for detecting the size adjustment controllable gain amplifier of the signal power of intermediate-freuqncy signal, so that the intermediate-freuqncy signal of output be made to guarantee
In certain dynamic range.
It is a kind of structural representation of the baseband processing module for digital if receiver that inventive embodiments provide with reference to Fig. 5
Figure.From intermediate frequency processing module export intermediate-freuqncy signal carry out analog-to-digital conversion obtain digital medium-frequency signal, the digital medium-frequency signal with
Digital signal down variable frequency is completed in NC0 (digital oscillator) mixing that external devices generate, and is completed extraction, filtering and demodulation and is counted
Word baseband signal.
In the present invention, a kind of above-mentioned digital if receiver further includes power module, power module be radio frequency processing module,
IF process module, frequency synthesizer module, baseband processing module normal work provide power supply.
Those of ordinary skill in the art will appreciate that: realize that all or part of the steps of above method embodiment can pass through
Program instruction relevant hardware is completed.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (4)
1. a kind of digital if receiver, which is characterized in that the digital if receiver includes: radio frequency processing module, mixing
Device, IF process module, baseband processing module and frequency synthesizer module；
Wherein, the input terminal of the radio frequency processing module is electrically connected with the output end of external antenna, the radio frequency processing module
Signal output end obtains rf inputs with the frequency mixer and is electrically connected, at the signal output end of the frequency mixer and the intermediate frequency
Manage the signal input part electrical connection of module, the signal output end of the IF process module and the signal of the baseband processing module
Input terminal electrical connection；
The local oscillation signal output end of the frequency synthesizer module is electrically connected with the local oscillation signal input terminal of the frequency mixer.
2. a kind of digital if receiver according to claim 1, which is characterized in that
The radio frequency processing module is amplified and is filtered for the received radiofrequency signal of external antenna to be amplified and filtered
Radiofrequency signal after wave；
The frequency synthesizer module is believed for generating local oscillation signal, and by the local oscillator that the local oscillation signal is sent to frequency mixer
Number input terminal；
The frequency mixer, amplification and filtered radiofrequency signal and the frequency for sending the radio frequency processing module
The local oscillation signal that rate Senthesizer module is sent is mixed, and intermediate-freuqncy signal is obtained；
The IF process module, the intermediate-freuqncy signal for obtaining the frequency mixer are amplified and are filtered, and are put what is obtained
Big and filtered intermediate-freuqncy signal is sent to baseband processing module；
The baseband processing module, for carrying out analog-to-digital conversion, down coversion to the amplification received and filtered intermediate-freuqncy signal
Processing, demodulation are extracted and are filtered, and obtain digital baseband signal, and be sent to receiver external.
3. a kind of digital if receiver according to claim 1, which is characterized in that
The radio frequency processing module includes sequentially connected broadband limiter, radio frequency amplifier and filter,
The broadband limiter is used to the received radiofrequency signal of external antenna carrying out power limit, and be sent into radio frequency amplifier into
Row power amplification, obtains amplified radiofrequency signal, and filter is used to filter out the interference signal of the amplified radiofrequency signal.
4. a kind of digital if receiver according to claim 1, which is characterized in that
The IF process module includes sequentially connected first bandpass filter, the first intermediate frequency amplifier, the second bandpass filtering
Device and controllable gain amplifier；
First bandpass filter is used to filter out the local oscillation signal and radiofrequency signal of mixer leakage in intermediate-freuqncy signal, in first
Audio amplifier, which is used to send the signal of amplification output to the second bandpass filter, filters out harmonic wave and spuious, the controllable gain amplification
Device is used to export the intermediate-freuqncy signal after amplifying post filtering to baseband processing module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811281648.5A CN109257056A (en) | 2018-10-31 | 2018-10-31 | A kind of digital if receiver |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811281648.5A CN109257056A (en) | 2018-10-31 | 2018-10-31 | A kind of digital if receiver |
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| Publication Number | Publication Date |
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| CN109257056A true CN109257056A (en) | 2019-01-22 |
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| CN201811281648.5A Pending CN109257056A (en) | 2018-10-31 | 2018-10-31 | A kind of digital if receiver |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110082735A (en) * | 2019-05-15 | 2019-08-02 | 上海航天电子通讯设备研究所 | The general irradiation instruction testing system of one kind and test device |
| CN112383331A (en) * | 2020-11-30 | 2021-02-19 | 国网新疆电力有限公司电力科学研究院 | Electric power wireless sensor network communication device based on 5G-IoT technology |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102664684A (en) * | 2012-04-23 | 2012-09-12 | 电子科技大学 | Wireless terminal transceiver of 60GHz RoF (Radio over Fiber) access system |
| CN203522718U (en) * | 2013-09-24 | 2014-04-02 | 广州海格通信集团股份有限公司 | Short-wave wide-band receiver with large dynamic range |
| CN104104400A (en) * | 2014-07-16 | 2014-10-15 | 中国人民解放军国防科学技术大学 | High-sensitivity satellite-borne ADS-B signal receiver |
-
2018
- 2018-10-31 CN CN201811281648.5A patent/CN109257056A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102664684A (en) * | 2012-04-23 | 2012-09-12 | 电子科技大学 | Wireless terminal transceiver of 60GHz RoF (Radio over Fiber) access system |
| CN203522718U (en) * | 2013-09-24 | 2014-04-02 | 广州海格通信集团股份有限公司 | Short-wave wide-band receiver with large dynamic range |
| CN104104400A (en) * | 2014-07-16 | 2014-10-15 | 中国人民解放军国防科学技术大学 | High-sensitivity satellite-borne ADS-B signal receiver |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110082735A (en) * | 2019-05-15 | 2019-08-02 | 上海航天电子通讯设备研究所 | The general irradiation instruction testing system of one kind and test device |
| CN112383331A (en) * | 2020-11-30 | 2021-02-19 | 国网新疆电力有限公司电力科学研究院 | Electric power wireless sensor network communication device based on 5G-IoT technology |
| CN112383331B (en) * | 2020-11-30 | 2023-03-14 | 国网新疆电力有限公司电力科学研究院 | Electric power wireless sensor network communication device based on 5G-IoT technology |
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