CN103973605B - A kind of multi tate burst adaptive communication device for being suitable for microwave communication - Google Patents
A kind of multi tate burst adaptive communication device for being suitable for microwave communication Download PDFInfo
- Publication number
- CN103973605B CN103973605B CN201410213932.4A CN201410213932A CN103973605B CN 103973605 B CN103973605 B CN 103973605B CN 201410213932 A CN201410213932 A CN 201410213932A CN 103973605 B CN103973605 B CN 103973605B
- Authority
- CN
- China
- Prior art keywords
- signal
- frequency
- demodulation
- low
- selector
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The invention discloses a kind of multi tate burst adaptive communication device for being suitable for microwave communication, the device includes auxiliary multiplexer-demultiplexer, spread spectrum modulator, single carrier modulators, mode selector, upconverter, intermediate frequency ring frequency converter, frequency conversion selector, D/A converters, AGC, bandpass filter, A/D converters, low-converter, extended frequency demodulator, single carrier demodulation device, Rate selector and channel estimation controller.It is selection spread spectrum or single-carrier wave frequency domain equalization technology under different stream rates that the present invention is selected by channel estimation controller, and estimated to obtain the current state parameter of channel according to real-time signal, ensure that channel realizes Lossless transport, while setting intermediate frequency ring frequency converter can realize that intermediate frequency ring is tested oneself debugging in modulated process.The present invention has communication lossless switching, the characteristics of accurate, while requiring the communication system of burst and rate adaptation.
Description
Technical field
The present invention relates to channel knowledge in microwave relay communication system and burst Adaptive Transmission device, it is particularly suitable for
QoS requirement is high, and speed conversion is complicated, while requiring the communication system of burst and rate adaptation.
Background technology
In traditional microwave radio relay communication technology, generally using the TDMA technologies of point-to-multipoint, traffic rate is more solid
Fixed, the change typically according to communication distance and communication environment sets fixed traffic rate and realizes real-time Communication for Power, this communication
Mode is more stable but changing capability of with environment is poor, and traffic rate is fixed, it is impossible to meet communication quality higher, and speed becomes
Complexity is changed, while requiring the microwave relay communication system of burst and rate adaptation.
The content of the invention
It is an object of the invention to make full use of channel knowledge and burst Adaptive Transmission communicator, communication nothing is realized
Damage switching.Because channel quality changes with time, this is accomplished by making the parameters of transmitting terminal corresponding adjustment, favorably
Channel condition just obtained in good time utilization it is final to improve communication effect so that channel capacity is more fully utilized
Rate.Various burst mechanism modem communication technologies are devised simultaneously complicated with adaptive channel environment, required communication rate conversion
More complicated communication environment.
The object of the present invention is achieved like this：
A kind of multi tate burst adaptive communication device for being suitable for microwave communication, including auxiliary multiplexer-demultiplexer 1, spread spectrum are adjusted
Device processed 2, single carrier modulators 3, mode selector 4, upconverter 5, intermediate frequency ring frequency converter 6, frequency conversion selector 7, D/A converters
8, AGC9, bandpass filter 10, A/D converters 11, low-converter 12, single carrier demodulation device 14, Rate selector 15 and power supply
17, also including extended frequency demodulator 13 and channel estimation controller 16；
Auxiliary multiplexer-demultiplexer 1 carries out framing to the data and clock signal of outside input and adds auxiliary expense to form industry
Business information, the auxiliary outgoing traffic information of multiplexer-demultiplexer 1 to spread spectrum modulator 2 and single carrier modulators 3, auxiliary double decomposition device 1 will
Channel-estimation information is exported to mode selector 4；Spread spectrum modulator 2 is modulated to business information and exports two-way bandwidth phase
Together, business information is carried out TPC coded modulations output two-way by the different modulated spread spectrum signal of spread spectrum multiple, single carrier modulators 3
Single-carrier modulated signal；Mode selector 4 enters according to current traffic rate to modulated spread spectrum signal and single-carrier modulated signal
Row selection simultaneously exports I, Q two-way baseband signals；I, Q two-way baseband signal carry out the Low Medium Frequency frequency spectrum of 21.4M by upconverter 5
Move, I, Q two-way baseband signal carries out the low intermediate frequency signal frequency spectrum shift of 40M by intermediate frequency ring frequency converter 6；The He of upconverter 5
Intermediate frequency ring frequency converter 6 respectively by the signal output after frequency spectrum shift to frequency conversion selector 7, after frequency conversion selector 7 is to frequency spectrum shift
Signal selected to export low intermediate frequency signal respectively low intermediate frequency signal is carried out to D/A converter 8 and AGC9, D/A converter 8
Exported after conversion；The low intermediate frequency signal and the 40M low intermediate frequency signals of outside input that be input into for frequency conversion selector 7 by AGC9 amplify
After be input to bandpass filter 10, the signals of 10 pairs of amplifications of bandpass filter are sent to A/D converters 11 after carrying out bandpass filtering,
Signal after bandpass filtering is carried out data sampling and is changed into data signal by A/D converters 11, and data signal is sent into lower change
Frequency device 12, low-converter 12 converts digital signals into two-way zero frequency signal and is respectively outputted to extended frequency demodulator 13 and single carrier solution
Device 14 is adjusted to be demodulated；Extended frequency demodulator 13 and single carrier demodulation device 14 by the signal output after demodulation to Rate selector 15,
The output of Rate selector 15 demodulation clock and demodulation code carry out tap and recover business information and clock to auxiliary multiplexer-demultiplexer 1；
Rate selector 15 will demodulate Soft Inform ation output to channel estimation controller 16, and channel estimation controller 16 carries out channel estimation and obtains
Go out channel information, reevaluate current optimal communication speed, and export to auxiliary multiplexer-demultiplexer 1, auxiliary multiplexer-demultiplexer 1 is according to letter
Estimate that the optimal communication speed that controller 16 draws carries out data multiplexing and the communication of subsequent time in road.
Wherein, described channel estimation controller 16 includes second order away from arithmetic unit 18, quadravalence away from arithmetic unit 19, complicated division
Device 20 and logarithm operation device 21；
Rate selector 15 is separately input to second order away from arithmetic unit 18 and quadravalence away from arithmetic unit 19, second order by Soft Inform ation is demodulated
Carry out second order away from computing away from 18 pairs, arithmetic unit demodulation Soft Inform ations and draw second order away from information output to complexity divider 20, quadravalence away from
19 pairs of demodulation Soft Inform ations of arithmetic unit carry out quadravalence and draw quadravalence away from information output to complicated divider 20 away from computing；Complicated divider
20 pairs of second orders obtain the signal to noise ratio ratio information of channel away from information and quadravalence after information processing, and logarithm operation device 21 is by signal to noise ratio
Ratio information draws signal to noise ratio logarithm information by logarithm operation.
Wherein, described extended frequency demodulator 13 includes that the first low pass filter 22-1, second low pass filter 22-2,4K are straight
Expand demodulator 23,80K linear frequency modulations demodulator 24 and 640K linear frequency modulations demodulator 25；
Q roads signal output is arrived low-converter 12 I roads signal output to the first low pass filter 22-1, low-converter 12
Second low pass filter 22-2, the first low pass filter 22-1 and the second low pass filter 22-2 is according to apread spectrum bandwidth to signal point
LPF is not carried out and obtains baseband signal, and baseband signal is respectively fed to the demodulation of 4K DSs demodulator 23,80K linear frequency modulations
Device 24 and 640K linear frequency modulations demodulator 25 are demodulated treatment, corresponding demodulation code, demodulation clock are obtained after demodulation and is demodulated soft
Information, 4K DSs demodulator 23,80K linear frequency modulations demodulator 24 and 640K linear frequency modulations demodulator 25 by demodulation code, demodulation clock
Selected with demodulation Soft Inform ation feeding Rate selector 15.
The present invention has the following advantages that compared to background technology：
(1) the problems such as complex operation low for existing microwave communication efficiency of transmission under complicated geographical environment of the invention,
Present invention adds channel knowledge function, by carrying out the different transmission rates of cognitive determination in real time to different channel status,
And then it is entirely autonomous to realize communication process, communicate lossless switching, the characteristics of accurate, the channel estimation controller that the present invention is used
16 without overhead, uses blind estimate technology.
(2) present invention has various burst communication speed, while the spread spectrum in employing field of microwave communication, single to carry
Wave frequency domain equalizing technology, can realize the burst communication rate requirement conversion of 4K to 10M, same to be particularly suitable for QoS requirement
Height, speed conversion is complicated, while requiring burst communication system.
(3) circuit block of the present invention is made using extensive field programmable device, therefore can be by configuring different journeys
Sequence neatly realizes the modification to running parameter, it is possible to achieve base band from ring, intermediate frequency from ring, radio frequency from ring, online and off line
The functions such as error code testing, this greatly simplifies the structure of equipment, the significant reduction of cost.
Brief description of the drawings：
Fig. 1 is block diagram of the invention；
Fig. 2 is the block diagram of channel estimation controller of the invention；
Fig. 3 is the block diagram of extended frequency demodulator of the present invention.
Specific embodiment：
Referring to figs. 1 to Fig. 3, the present invention includes auxiliary multiplexer-demultiplexer 1, spread spectrum modulator 2, single carrier modulators 3, waveform choosing
Device 4 is selected, upconverter 5, intermediate frequency ring frequency converter 6, frequency conversion selector 7, D/A converters 8, AGC9, bandpass filter 10, A/D becomes
Parallel operation 11, low-converter 12, single carrier demodulation device 14, Rate selector 15 and power supply 17, also including extended frequency demodulator 13 and letter
Estimate controller 16 in road；
Auxiliary multiplexer-demultiplexer 1 carries out framing and adds auxiliary expense to the data and clock signal of outside input, aids in
The outgoing traffic information of multiplexer-demultiplexer 1 is to spread spectrum modulator 2 and single carrier modulators 3；Spread spectrum modulator 2 is adjusted to business information
Make and export two-way bandwidth is identical, the different modulated spread spectrum signal of spread spectrum multiple, single carrier modulators 3 carry out business information
TPC coded modulations export two-way single-carrier modulated signal；Mode selector 4 is according to current traffic rate to modulated spread spectrum signal
I, Q two-way baseband signals are selected and exported with single-carrier modulated signal；I, Q two-way baseband signal are entered by upconverter 5
The Low Medium Frequency frequency spectrum shift of row 21.4M, the low intermediate frequency signal that I, Q two-way baseband signal carry out 40M by intermediate frequency ring frequency converter 6 is frequently
Spectrum is moved；Signal after two-way spectrum offset exports low intermediate frequency signal to D/A converters respectively by the selection of frequency conversion selector 7
8 and AGC9, D/A converter 8 enter after line translation output to radio frequency unit to low intermediate frequency signal；Be input into for frequency conversion selector 7 by AGC9
Low intermediate frequency signal and radio frequency unit input 40M low intermediate frequency signals amplify after be input to bandpass filter 10, bandpass filter
The signal of 10 pairs of amplifications is sent to A/D converters 11 after carrying out bandpass filtering, and A/D converters 11 enter the signal after bandpass filtering
Row data sampling is changed into data signal, and data signal is sent into low-converter 12, and low-converter 12 changes data signal
For two-way zero frequency signal is respectively outputted to extended frequency demodulator 13 and single carrier demodulation device 14 is demodulated；Extended frequency demodulator 13 and list
Carrier demodulator 14 arrives the signal output after demodulation to Rate selector 15, the output of Rate selector 15 demodulation clock and demodulation code
Auxiliary multiplexer-demultiplexer 1 carries out tap and recovers business information and clock；Rate selector 15 will demodulate Soft Inform ation output to letter
Controller 16 is estimated in road, and channel estimation controller 16 carries out channel estimation and draws channel information, reevaluates current optimal communication
Speed, and export the optimal communication speed drawn according to channel estimation controller 16 to auxiliary multiplexer-demultiplexer 1, auxiliary multiplexer-demultiplexer 1
Rate carries out data multiplexing and the communication of subsequent time；
Embodiment spread spectrum modulator 2, single carrier modulators 3, mode selector 4, upconverter 5, intermediate frequency ring frequency converter 6,
Frequency conversion selector 7 produces the Series FPGA chip manufacturings of Cyclone III using altera corp of the U.S..D/A converters 8 are using beautiful
The AD9763 chip manufacturings of AD companies of state, bandpass filter 10 is made up of 6SBP/70M combine analog circuits, and A/D converters 11 are adopted
With the AD9432 chip manufacturings of AD companies of the U.S..
Wherein, described channel estimation controller 16 is removed away from arithmetic unit 18, quadravalence including second order away from arithmetic unit .19, complexity
Musical instruments used in a Buddhist or Taoist mass 20 and logarithm operation device 21；
Rate selector 15 is separately input to second order away from arithmetic unit 18 and quadravalence away from arithmetic unit 19, second order by Soft Inform ation is demodulated
Second order is carried out away from computing away from 18 pairs of demodulation Soft Inform ations of arithmetic unit and draws input of the second order away from information output to complicated divider 20
Port 1, quadravalence carries out quadravalence and draws quadravalence away from information output to complicated divider away from computing away from 19 pairs of demodulation Soft Inform ations of arithmetic unit
20；Complicated divider 20 obtains the signal to noise ratio ratio information of channel, logarithm fortune to second order away from information and quadravalence after information processing
Calculate device 21 and signal to noise ratio ratio information is drawn into signal to noise ratio logarithm information by logarithm operation；
The effect of channel estimation controller 16 is in the case where that need not add overhead, to the real time status of channel
Estimated the transmission rate so that it is determined that different, so that channel capacity is more fully utilized, it is final to improve communication
Efficiency.Fig. 2 is the block diagram of channel estimation controller of the present invention 16.Second order is away from arithmetic unit 18, quadravalence away from arithmetic unit 19, multiple
Miscellaneous divider 20 and logarithm operation device 21 use the Series FPGA chip manufacturings of Cyclone III.
Wherein, described extended frequency demodulator 13 includes that the first low pass filter 22-1, second low pass filter 22-2,4K are straight
Expand demodulator 23,80K linear frequency modulations demodulator 24 and 640K linear frequency modulations demodulator 25；
Low-converter 12 is by I roads signal output to the first low pass filter 22-1, low-converter 12Q road signal outputs to
Two low pass filter 22-2, the first low pass filter 22-1 and the second low pass filter 22-2 are according to apread spectrum bandwidth to I, Q two-way
Signal carries out LPF and obtains I respectively, Q two-way baseband signals, by I, Q two-way baseband signal feeding 4K DSs demodulator 23,
80K linear frequency modulations demodulator 24 and 640K linear frequency modulations demodulator 25 are demodulated treatment and obtain corresponding demodulation code, demodulation clock
With demodulation Soft Inform ation, and by demodulation code, demodulation clock and demodulation Soft Inform ation feeding Rate selector 15 selected.
The effect of extended frequency demodulator of the present invention 13 is that various spread spectrum solution speed are focused on the purpose for reaching and economizing on resources；
Fig. 3 is the block diagram of new extended frequency demodulator 13 of the invention.First low pass filter 22-1 and the second low pass filter 22-
2nd, 4K DSs demodulator 23,80K linear frequency modulations demodulator 24 and 640K linear frequency modulations demodulator 25 are using the series of Cyclone III
Fpga chip makes.
Power supply of the present invention 17 provides the direct-current working volts of whole modem and the voltage of transformation of interlock circuit, implements
Example uses commercially available general integrated constant voltage dc source module making.
Mounting structure of the present invention is as follows：
All circuit devcies in Fig. 1, Fig. 2, Fig. 3 be arranged on 1 block size size it is long × printing of a width of 210 × 180mm
On plate, interlock circuit is then laid out wiring and is arranged in shielding box plug-in unit, shielding box plug-in unit is arranged on modem
In cabinet, shielding box plug-in unit front panel install service port A, B, C, D flex cable socket and signal input end of intermediate frequency mouthful F, in
Frequency signal output port E cable sockets, are installed on rear board, assembly cost invention.
Claims (3)
1. a kind of multi tate burst adaptive communication device for being suitable for microwave communication, including auxiliary multiplexer-demultiplexer（1）, spread spectrum adjust
Device processed（2）, single carrier modulators（3）, mode selector（4）, upconverter（5）, intermediate frequency ring frequency converter（6）, frequency conversion selector
（7）, D/A converters（8）、AGC（9）, bandpass filter（10）, A/D converters（11）, low-converter（12）, single carrier demodulation
Device（14）, Rate selector（15）And power supply（17）, it is characterised in that：Also include extended frequency demodulator（13）With channel estimation control
Device（16）；
Auxiliary multiplexer-demultiplexer（1）Framing is carried out to the data and clock signal of outside input and adds auxiliary expense to form business
Information, aids in multiplexer-demultiplexer（1）Outgoing traffic information is to spread spectrum modulator（2）And single carrier modulators（3）, aid in double decomposition device
（1）Channel-estimation information is exported to mode selector（4）；Spread spectrum modulator（2）Two are modulated and exported to business information
Road bandwidth is identical, the different modulated spread spectrum signal of spread spectrum multiple, single carrier modulators（3）Business information is carried out into TPC codings to adjust
System output two-way single-carrier modulated signal；Mode selector（4）According to current traffic rate to modulated spread spectrum signal and single load
Ripple modulated signal is selected and is exported I, Q two-way baseband signals；I, Q two-way baseband signal pass through upconverter（5）Carry out
The Low Medium Frequency frequency spectrum shift of 21.4M, I, Q two-way baseband signal are by intermediate frequency ring frequency converter（6）Carry out the low intermediate frequency signal of 40M frequently
Spectrum is moved；Upconverter（5）With intermediate frequency ring frequency converter（6）Respectively by the signal output after frequency spectrum shift to frequency conversion selector（7）,
Frequency conversion selector（7）Signal after frequency spectrum shift is selected to export low intermediate frequency signal to D/A converters respectively（8）And AGC
（9）, D/A converters（8）Exported after entering line translation to low intermediate frequency signal；AGC（9）By frequency conversion selector（7）What is be input into is low
The 40M low intermediate frequency signals of intermediate-freuqncy signal and outside input are input to bandpass filter after amplifying（10）, bandpass filter（10）It is right
The signal of amplification is sent to A/D converters after carrying out bandpass filtering（11）, A/D converters（11）Signal after bandpass filtering is entered
Row data sampling is changed into data signal, and data signal is sent into low-converter（12）, low-converter（12）By data signal
Be converted to two-way zero frequency signal and be respectively outputted to extended frequency demodulator（13）With single carrier demodulation device（14）It is demodulated；Spread spectrum demodulation
Device（13）With single carrier demodulation device（14）By the signal output after demodulation to Rate selector（15）, Rate selector（15）Output
Demodulate clock and demodulation code to auxiliary multiplexer-demultiplexer（1）Carry out tap and recover business information and clock；Rate selector（15）
Channel estimation controller is arrived into demodulation Soft Inform ation output（16）, channel estimation controller（16）Carry out channel estimation and show that channel is believed
Breath, reevaluates current optimal communication speed, and export to auxiliary multiplexer-demultiplexer（1）, aid in multiplexer-demultiplexer（1）Estimated according to channel
Meter controller（16）The optimal communication speed for drawing carries out data multiplexing and the communication of subsequent time.
2. it is according to claim 1 it is a kind of be suitable for microwave communication multi tate burst adaptive communication device, its feature
It is：Described channel estimation controller（16）Including second order away from arithmetic unit（18）, quadravalence is away from arithmetic unit（19）, complicated divider
（20）And logarithm operation device（21）；
Rate selector（15）Demodulation Soft Inform ation is separately input to second order away from arithmetic unit（18）With quadravalence away from arithmetic unit（19）, two
Rank is away from arithmetic unit（18）Second order is carried out to demodulation Soft Inform ation away from computing and draws second order away from information output to complicated divider（20）,
Quadravalence is away from arithmetic unit（19）Quadravalence is carried out to demodulation Soft Inform ation draws quadravalence away from information output to complicated divider away from computing（20）；
Complicated divider（20）Obtain the signal to noise ratio ratio information of channel, logarithm operation after information processing away from information and quadravalence to second order
Device（21）Signal to noise ratio ratio information is drawn into signal to noise ratio logarithm information by logarithm operation.
3. it is according to claim 1 it is a kind of be suitable for microwave communication multi tate burst adaptive communication device, its feature
It is：Described extended frequency demodulator（13）Including the first low pass filter（22-1）, the second low pass filter（22-2）, 4K DSs
Demodulator（23）, 80K linear frequency modulation demodulators（24）With 640K linear frequency modulation demodulators（25）；
Low-converter（12）By I roads signal output to the first low pass filter（22-1）, low-converter（12）By Q roads signal output
To the second low pass filter（22-2）, the first low pass filter（22-1）With the second low pass filter（22-2）According to apread spectrum bandwidth
Carry out LPF respectively to signal and obtain baseband signal, and baseband signal is respectively fed to 4K DS demodulators（23）, 80K lines
Property FM demodulator（24）With 640K linear frequency modulation demodulators（25）Be demodulated treatment, obtained after demodulation corresponding demodulation code,
Demodulation clock and demodulation Soft Inform ation, 4K DS demodulators（23）, 80K linear frequency modulation demodulators（24）With 640K linear frequency modulation demodulators
（25）By demodulation code, demodulation clock and demodulation Soft Inform ation feeding Rate selector（15）Selected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410213932.4A CN103973605B (en) | 2013-12-18 | 2014-05-20 | A kind of multi tate burst adaptive communication device for being suitable for microwave communication |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320837297.8 | 2013-12-18 | ||
| CN2013208372978 | 2013-12-18 | ||
| CN201320837297 | 2013-12-18 | ||
| CN201410213932.4A CN103973605B (en) | 2013-12-18 | 2014-05-20 | A kind of multi tate burst adaptive communication device for being suitable for microwave communication |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103973605A CN103973605A (en) | 2014-08-06 |
| CN103973605B true CN103973605B (en) | 2017-06-27 |
Family
ID=51242662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410213932.4A Active CN103973605B (en) | 2013-12-18 | 2014-05-20 | A kind of multi tate burst adaptive communication device for being suitable for microwave communication |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103973605B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104469800A (en) * | 2014-10-22 | 2015-03-25 | 成都锐新科技有限公司 | Multi-rate adaptive communication device suitable for microwave communication |
| CN104660376B (en) * | 2015-03-17 | 2017-10-20 | 中国电子科技集团公司第五十四研究所 | A kind of radio communication device happened suddenly at random |
| CN104660375B (en) * | 2015-03-17 | 2018-01-30 | 中国电子科技集团公司第五十四研究所 | A kind of multi tate modem apparatus based on burst communication |
| CN105743612B (en) * | 2016-01-28 | 2019-01-08 | 中国电子科技集团公司第十研究所 | The method that Real-Time Blind solution tunes up frequency displacement short-term burst signal |
| CN106230759B (en) * | 2016-09-20 | 2023-03-31 | 中国电子科技集团公司第五十四研究所 | Point-to-multipoint high-speed burst modulator, demodulator and modulation-demodulation device |
| CN109862005B (en) * | 2019-01-28 | 2021-06-01 | 中国电子科技集团公司第二十九研究所 | Efficient information compression characterization and decompression method and device for signal simulation |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101340410A (en) * | 2008-08-20 | 2009-01-07 | 中国电子科技集团公司第五十四研究所 | Millimeter wave modem |
| CN101359993A (en) * | 2008-08-20 | 2009-02-04 | 中国电子科技集团公司第五十四研究所 | High-speed burst modem |
| CN201252577Y (en) * | 2008-06-27 | 2009-06-03 | 麦华彬 | Mobile equipment attachment |
| CN201467131U (en) * | 2009-08-12 | 2010-05-12 | 中国电子科技集团公司第五十四研究所 | Two-dimensional self-adaptive communication device suitable for fading channel |
| CN201467138U (en) * | 2009-09-07 | 2010-05-12 | 中国电子科技集团公司第五十四研究所 | Dynamic channel estimation-based dual-mode communication controller |
| CN203193625U (en) * | 2012-12-28 | 2013-09-11 | 中国电子科技集团公司第五十四研究所 | Miniaturized zero intermediate frequency transceiver |
-
2014
- 2014-05-20 CN CN201410213932.4A patent/CN103973605B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201252577Y (en) * | 2008-06-27 | 2009-06-03 | 麦华彬 | Mobile equipment attachment |
| CN101340410A (en) * | 2008-08-20 | 2009-01-07 | 中国电子科技集团公司第五十四研究所 | Millimeter wave modem |
| CN101359993A (en) * | 2008-08-20 | 2009-02-04 | 中国电子科技集团公司第五十四研究所 | High-speed burst modem |
| CN201467131U (en) * | 2009-08-12 | 2010-05-12 | 中国电子科技集团公司第五十四研究所 | Two-dimensional self-adaptive communication device suitable for fading channel |
| CN201467138U (en) * | 2009-09-07 | 2010-05-12 | 中国电子科技集团公司第五十四研究所 | Dynamic channel estimation-based dual-mode communication controller |
| CN203193625U (en) * | 2012-12-28 | 2013-09-11 | 中国电子科技集团公司第五十四研究所 | Miniaturized zero intermediate frequency transceiver |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103973605A (en) | 2014-08-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103973605B (en) | A kind of multi tate burst adaptive communication device for being suitable for microwave communication | |
| CN101359993B (en) | High-speed burst modem | |
| CN101048960B (en) | Communication method and radio transmitter | |
| US20050238089A1 (en) | Communication apparatus and communication method using digital wavelet multi carrier transmission system | |
| CN101296214A (en) | Time orthogonal frequency division multiplexing modem | |
| CN100395958C (en) | Method and system for re-modulation using zero if | |
| CN101437006B (en) | Modem apparatus compatible with multiple systems | |
| CN106357325B (en) | High-order multidimensional spread spectrum modulator, high-order multidimensional despread-and-demodulation device and spread spectrum device | |
| CN201252555Y (en) | Speed self-adaptive scatter communication modem | |
| JP6002132B2 (en) | IQ mismatch correction method and RF transceiver | |
| CN203445873U (en) | Multiphase power line carrier communication apparatus | |
| CN113411131A (en) | Digital-analog signal hybrid transmission method | |
| CN103888166B (en) | Transmission modulation-demodulation device is composed in scatter communication altogether | |
| CN104579177A (en) | Digital down-conversion circuit suitable for filtering multi-tone modulation system | |
| CN104579555A (en) | Scatter communication link control device based on level detection | |
| CN204697106U (en) | A kind of OFDM power line carrier and GFSK wireless double mode communication chip | |
| CN204518093U (en) | A kind of OFDM carrier wave of low-power consumption and GFSK wireless double mode communication chip | |
| CN2792021Y (en) | Distortion adaptive high-capacity scatter communication modem | |
| CN202261507U (en) | IP scatter communication device | |
| CN1839546B (en) | Digital RF circuit and its signal processing method | |
| CN104821791B (en) | Modem device based on adaptive equalization and with calibrating frequency function | |
| CN201467161U (en) | Low-threshold modulator-demodulator based on time diversity | |
| CN104394115B (en) | Based on the radio communication device that OFDM and SC_FDE is applied jointly | |
| CN108306657A (en) | A kind of power-line carrier communication method | |
| CN201467124U (en) | Multi-mode compatible channel machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |