CN107133014A - Broader frequency spectrum monitoring system and its method for producing high speed PRBS signal - Google Patents
Broader frequency spectrum monitoring system and its method for producing high speed PRBS signal Download PDFInfo
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- CN107133014A CN107133014A CN201710213321.3A CN201710213321A CN107133014A CN 107133014 A CN107133014 A CN 107133014A CN 201710213321 A CN201710213321 A CN 201710213321A CN 107133014 A CN107133014 A CN 107133014A
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Abstract
The invention discloses broader frequency spectrum monitoring system and the method for producing high speed PRBS signal, including signal pre-conditioner module, power splitter, frequency mixer, low pass filter, intermediate frequency amplifier, FPGA module, restructing algorithm device, the output end of the signal pre-conditioner module connects the input of power splitter, the signal of four tunnel output ends outputs of the FPGA module generation high speed PRBS signal and power splitter is all input to the input of frequency mixer, four tunnel output ends of the frequency mixer all connect the input of intermediate frequency amplifier by low pass filter, four tunnel output end connection FPGA modules of the intermediate frequency amplifier, the FPGA module connects restructing algorithm device, present invention reduces noise jamming, improve the stability of system, meet the requirement that modulation wide-band transducer system handles broadband sparse signal.
Description
Technical field
The present invention relates to a kind of broader frequency spectrum monitoring system and its method for producing high speed PRBS signal.
Background technology
Nyquist sampling theorem shows：Analog-digital converter Analog to Digital, ADC sample frequency must be big
In or equal to twice of signal highest frequency, original simulation letter could be reconstructed without distortions from discrete sampled value
Number.In face of the signal monitoring bandwidth increasingly increased, the broader frequency spectrum designed using traditional nyquist sampling method, which is monitored, is
System can greatly increase the hardware cost of sampling, meanwhile, sample produce mass data amount also can to data storage, transmission and
Computing brings immense pressure.Modulation wide-band transducer Modulated Wideband based on compressive sensing theory
Converter, MWC can carry out blind sampling with the sample rate far below Nyquist rate to broadband sparse signal, pass through reconstruct
Reconstruct primary signal algorithm high probability, had broad application prospects in the design of broader frequency spectrum monitoring system.
The theory diagram of wide-band transducer is modulated as shown in figure 1, being [0, f first by the frequency range receivednyq/ 2]
Broadband sparse signal x (t) is divided into m roads identical signal fnyqRepresent the Nyquist of bandwidth peak signal in the sparse signal of broadband
Sample rate, while into m parallel channel；Then respectively with the m roads cycle be TpPseudo-random sequence pi(t) Frequency mixing processing is carried out.
Wherein, the bit rate of pseudo-random sequence can not be less than fnyq；Then it is 1/ (2T each via a cut-off frequencys) it is preferable low
Bandpass filter h (t)；Finally with fs=1/TsSample rate filtered signal is sampled, obtain Sub-nyquist sampling sequence
Arrange yi[n], primary signal x (t) is recovered by restructing algorithm.
However, because modulation wide-band transducer theory has many restrictions to hardware, particularly in the processing sparse letter of ultra wide band
Number when, it is desirable to the bit rate of pseudo-random sequence be not less than signal nyquist sampling rate.And the generation of high speed PRBS
Inherently one problem, the design that greatly limit modulation wide-band transducer is realized.
The content of the invention
The purpose of the present invention be overcome the shortcomings of prior art exist there is provided a kind of broader frequency spectrum monitoring system and its generation
The method of high speed PRBS signal.
To achieve the above object, the present invention provides following technical scheme：
Broader frequency spectrum monitoring system, including the amplification of signal pre-conditioner module, power splitter, frequency mixer, low pass filter, intermediate frequency
Device, FPGA module, restructing algorithm device, the output end of the signal pre-conditioner module connect the input of power splitter, the FPGA
The signal of four tunnel output ends outputs of module generation high speed PRBS signal and power splitter is all input to the input of frequency mixer
End, four tunnel output ends of the frequency mixer all connect the input of intermediate frequency amplifier, the intermediate frequency amplification by low pass filter
The tunnel output end connection FPGA modules of Qi tetra-, the FPGA module connects restructing algorithm device.
The GTX modules that the FPGA module is included in ADC, GTX modules, the FPGA module produce high speed pseudorandom
The signal of four tunnel output end outputs of sequence signal and power splitter is all input to the input of frequency mixer, the intermediate frequency amplifier
ADC in four road inputs connection FPGA modules, the GTX modules include data transmission bus, GTX module transmitting terminals
Go forward side by side and go here and there out module.
The signal pre-conditioner module includes low-noise amplifier, adjustable attenuator, amplifier module, and the low noise is put
Big device connects the output end connection of the amplifier module in amplifier module, the signal pre-conditioner module by adjustable attenuator
The input of power splitter.
The high speed PRBS signal is produced using RocketIO high-speed serial datas transmission technology.
The frequency mixer is designed using ADL5801 chips.
The intermediate frequency amplifier is designed using OPA847 chips.
The low-noise amplifier is designed using BGB707L7ESD chips.
The method for producing high speed PRBS signal, method comprises the following steps：
1st, with the MATLAB softwares matrix that 4 rows 127 of generation are arranged at random, by every a line random number one cycle of correspondence of matrix
Pseudo-random sequence；
2nd, -1 in matrix is changed into 0 formation pseudo noise code, be stored in FPGA RAM block；
3rd, GTX modules start, and are one group, data of the transmitted in parallel to GTX modules by every 16 pseudo noise codes in RAM block
Transfer bus, obtains parallel data, then by GTX module transmitting terminals go forward side by side go here and there out module parallel data with serial side
Formula is sent, and obtains high speed PRBS signal.
Compared with prior art, the beneficial effects of the invention are as follows：
First, signal pre-conditioner module, power splitter, frequency mixer, low pass filter, intermediate frequency amplifier, FPGA module are set
Meter reduces noise jamming, improves the stability of system on one piece of board；
Second, high speed PRBS generator is designed using the GTX modules in FPGA, modulation wide-band transducer is met
System handles the requirement of broadband sparse signal；
3rd, the four-way modulation wide-band transducer hardware of 50MHz-500MHz sparse multi-band signals can be handled by designing
System, can effectively reconstruct the frequency spectrum of primary signal.
Brief description of the drawings：
Fig. 1 is the theory diagram of modulation wide-band transducer；
Fig. 2 is system block diagram of the invention；
Fig. 3 is the circuit theory diagrams of low-noise amplifier；
Fig. 4 is the circuit theory diagrams of adjustable attenuator；
Fig. 5 is the circuit theory diagrams of amplifier module；
Fig. 6 is the circuit theory diagrams of power splitter；
Fig. 7 is the circuit theory diagrams of frequency mixer；
Fig. 8 is the circuit theory diagrams of low pass filter 6；
Fig. 9 is the frequency characteristic of low-pass filter circuit；
Figure 10 is the circuit theory diagrams of intermediate frequency amplifier；
Figure 11 is the Clock networks block diagram of high speed PRBS generator；
Figure 12 is high speed PRBS time domain beamformer；
Figure 13 is the spectrogram of high speed PRBS time domain；
Figure 14 be 100MHz sinusoidal signals be mixed through MWC, filtered measured waveform；
Figure 15 is frequency spectrum of the 100MHz sinusoidal signals through MWC lack sampling post-sampling sequences；
Figure 16 is frequency spectrum reconfiguration of the 100MHz sinusoidal signals after MWC lack samplings；
Figure 17 be QPSK signals be mixed through MWC, filtered measured waveform；
Figure 18 is frequency spectrum of the QPSK signals through MWC lack sampling post-sampling sequences；
Figure 19 is frequency spectrum reconfiguration of the QPSK signals after MWC lack samplings；
Figure 20 be single CF signal+QPSK signals be mixed through MWC, filtered measured waveform；
Figure 21 is single CF signal+QPSK signals through MWC lack sampling post-sampling sequence spectrums；
Figure 22 is single frequency spectrum reconfiguration of the CF signal+QPSK signals through MWC lack samplings.
Embodiment
As shown in Fig. 2 broader frequency spectrum monitoring system, including signal pre-conditioner module 1, power splitter 4, frequency mixer 5, low pass filtered
Ripple device 6, intermediate frequency amplifier 7, FPGA module 2, restructing algorithm device 3, the output end connection power splitter of the signal pre-conditioner module 1
4 input, the FPGA module 2 produces the signal of four tunnel output end outputs of high speed PRBS signal and power splitter 4
The input of frequency mixer 5 is all input to, four tunnel output ends of the frequency mixer 5 all connect intermediate frequency by low pass filter 6 and amplified
The input of device 7, four tunnel output end connection FPGA modules 2 of the intermediate frequency amplifier 7, the connection of FPGA module 2 reconstruct is calculated
Musical instruments used in a Buddhist or Taoist mass 3.
As shown in Fig. 2 the FPGA module 2 includes the GTX moulds in ADC 22, GTX modules 21, the FPGA module
The signal that block 21 produces four tunnel output end outputs of high speed PRBS signal and power splitter 4 is all input to the defeated of frequency mixer 5
Enter the ADC 22 in end, four road input connection FPGA modules of the intermediate frequency amplifier 7, the GTX modules 21 include number
Module is gone here and there out according to transfer bus, going forward side by side for GTX module transmitting terminals.
As shown in Fig. 2 the signal pre-conditioner module 1 includes low-noise amplifier 11, adjustable attenuator 12, amplifier mould
Block 13, the low-noise amplifier 11 is connected in amplifier module 13, the signal pre-conditioner module by adjustable attenuator 12
Amplifier module 13 output end connect power splitter 4 input.
High speed PRBS signal is produced using RocketIO high-speed serial datas transmission technology.
The low-noise amplifier 11 is designed using BGB707L7ESD chips, as shown in figure 3, chip U1 models
BGB707L7ESD.LNA_1N is input, receives the broadband signal from antenna.LNA_OUT is output end, connection rear end
Adjustable attenuator 12.
As shown in figure 4, being the circuit theory diagrams of adjustable attenuator 12, chip U9-A models DAT-31R5-PP+.BE ends
For enable port, the output port of adjustable attenuator 12 is ATT_OUT.
As shown in figure 5, being the circuit theory diagrams of amplifier module 13, its chips U23 models GVA-63+.Amplification is defeated
It is GVA_OUT to go out end.
As shown in fig. 6, the circuit theory diagrams of power splitter 4, wherein U17, U24, U25 are three same model TCP-2-33W+
Chip.RF0 ports, RF1 ports, RF2 ports and RF3 ports are connected per frequency mixer all the way respectively.
As shown in fig. 7, the circuit theory diagrams of frequency mixer 5, the frequency mixer 5 is designed using ADL5801 chips.Its SMIS
Piece U10 models ADL5801.LO_TXN1 and LO_TXP1 are frequency mixer differential input ends, and input signal comes from FPGA GTX
The high speed PRBS of module generation.IFOP_1 and IFON_1 is mixer intermediate-frequency output end, connects the LPF of rear end
Device.
As shown in figure 8, the circuit theory diagrams of low pass filter 6, its cut-off frequency is 33MHz.Inductance value L1=L4=L3
=L6=606.82nH, L2=L5=648.34nH.Capacitance C1=C2=C3=C442pF.Fig. 9 is low-pass filter circuit
Frequency characteristic；
As shown in Figure 10, the circuit theory diagrams of intermediate frequency amplifier, the intermediate frequency amplifier 7 is set using OPA847 chips
Meter.Wherein IFAP_1 and IFAN_1 is the low frequency difference signal exported after low pass filter is filtered, and IF1_OUT is put port for intermediate frequency
The single-ended signal of big device amplification output.Differential gain is 9.06, with a width of 430MHz, can be effectively to the base band in 33MHz
Signal amplifies, and also reduces the common-mode noise of signal.
The method methods described for producing high speed PRBS signal comprises the following steps：
1st, with the MATLAB softwares matrix that 4 rows 127 of generation are arranged at random, by every a line random number one cycle of correspondence of matrix
Pseudo-random sequence；
2nd, -1 in matrix is changed into 0 formation pseudo noise code, be stored in FPGA RAM block；
3rd, GTX modules start, and are one group, data of the transmitted in parallel to GTX modules by every 16 pseudo noise codes in RAM block
Transfer bus, obtains parallel data, then by GTX module transmitting terminals go forward side by side go here and there out module parallel data with serial side
Formula is sent, and obtains high speed PRBS signal.
High speed PRBS is produced using RocketIO high-speed serial datas transmission technology.Xilinx FPGA height
Fast serial data transceiver GTX (Gigabit Transceiver X, GTX) has multi-channel data transmission passage, can meet modulation
The requirement of wide-band transducer multichannel mixing, and transmission rate is high.In XilinxVirtex5 Series FPGAs, string can be set
Row transmission rate 150Mb/s to 6.5Gb/s, the flank speed reached is significantly larger than the Nyquist rate of signal in the system.
The multi-path pseudorandom sequence that multigroup GTX inside FPGA is produced also easy being consistent property.
In the hardware of modulation wide-band transducer is realized, it is desirable to ADC sampling clock and the reference for producing pseudo-random sequence
Clock will keep synchronous or homologous, sampled data and pseudo noise code could be strictly mapped, and realize to primary signal
Accurate Reconstruction.Therefore, 1.6Gb/s pseudo-random sequence is produced with GTX, it is necessary to provide 100MHz ginseng to GTX outside FPGA
Examine clock.ADC clock module is produced into 20MHz clock signals and gives frequency synthesizer 844003-01.Frequency synthesizer is produced
100MHz Low Voltage Differential Signal as GTX external reference clock.The Clock networks block diagram of high speed PRBS generator
As shown in figure 11.
With the MATLAB softwares matrix that 4 rows 127 of generation are arranged at random, equiprobability random value ± 1.Every a line of matrix is random
Pseudo-random sequence in number one cycle of correspondence.- 1 in matrix is changed into 0, is loaded in FPGA RAM block.After GTX starts, with
Every 16 pseudo noise codes in RAM block are one group, and then data transmission bus TXDATA of the transmitted in parallel to GTX sent out by GTX
The going forward side by side of sending end goes here and there out module (Parallel In to Serial Out, PISO) module, based on the good height of frequency multiplication inside GTX
Fast serial clock in a serial fashion sends parallel data, obtains high-speed-differential pseudo-random sequence.
High speed PRBS time domain waveform and frequency spectrum are observed with oscillograph as shown in Figure 12 and Figure 13, and bit rate is
1.6Gb/s。
It is utilized respectively single CF signal and QPSK signals to test the broader frequency spectrum monitoring system of the present invention, recycles
Single CF signal and QPSK signals are synthesized sparse dual band signal to verify modulation wide-band transducer hardware system by power combiner
The perception united to broader frequency spectrum.
First, single CF signal test.100MHz tone signal is produced with signal source, is divided into four tunnels through power splitter 4, with
After the mixing of cycle pseudo-random sequence, low pass filter, four tunnel intermediate-freuqncy signals are obtained, the time domain ripple of four road signals is observed with oscillograph
Shape is as shown in figure 14.Four road sample sequence frequency spectrums are analyzed as shown in figure 15,100MHz frequencies are repeatedly moved, if occurring in base band
Dry single-tone frequency.The frequency spectrum for recovering input signal by restructing algorithm is as shown in figure 16.It can be seen that from the result in Figure 16
100MHz single CF signal frequency spectrum is successfully detected.
Second, QPSK signal testing.It is 400MHz to produce a carrier frequency using signal source, the QPSK letters with a width of 2MHz
Number, filtered intermediate-freuqncy signal is obtained by the system low pass filter, the four road signals that oscillograph is observed are as shown in figure 17.
Obtain after four road sample sequences, analyze its frequency spectrum as shown in figure 18, after QPSK signals are mixed with cycle pseudo-random sequence, signal
Frequency spectrum is shifted to whole frequency band, is made up of per the frequency spectrum of road sequence several frequency bands.Figure 19, can be with to reconstruct signal spectrum
Find out that carrier frequency is successfully detected out for 400MHz, the QPSK signals with a width of 2MHz.
3rd, single CF signal+QPSK signal testings.The single CF signal for being tested above-mentioned two using power combiner
Sparse dual band signal is synthesized as the input signal of system with QPSK signals.Four tunnel intermediate-freuqncy signals, actual measurement are exported through the system
Waveform is as shown in figure 20.The frequency spectrum of four road signals is as shown in figure 21 after ADC 22 is sampled, except containing several band signals
Outside, also multiple single frequency point signals.Illustrate that sample sequence contains the mixed signal of tone signal and QPSK signals.Finally reconstruct
Signal spectrum as shown in figure 22, successfully recover the frequency spectrum of mixed signal.
The present invention can complete the reconstruct to sparse multi-band signals, with good frequency spectrum perception performance, signal is pre-
Conditioning module, power splitter, frequency mixer, low pass filter, intermediate frequency amplifier, FPGA module design are reduced on one piece of board
Noise jamming, improves the stability of system；High speed PRBS generator is designed using the GTX modules in FPGA, it is full
Foot modulation wide-band transducer system handles the requirement of broadband sparse signal；50MHz-500MHz sparse multi-bands can be handled by designing
The four-way modulation wide-band transducer hardware system of signal, can effectively reconstruct the frequency spectrum of primary signal.
It should be noted that listed above is only a kind of specific embodiment of the invention.It is clear that the invention is not restricted to
Upper embodiment, can also there is many deformations.In a word, one of ordinary skill in the art can directly lead from present disclosure
Go out or associate its have deformation, be considered as protection scope of the present invention.
Claims (8)
1. broader frequency spectrum monitoring system, it is characterised in that including signal pre-conditioner module (1), power splitter (4), frequency mixer (5),
Low pass filter (6), intermediate frequency amplifier (7), FPGA module (2), restructing algorithm device (3), the signal pre-conditioner module (1)
The input of output end connection power splitter (4), the FPGA module (2) produces high speed PRBS signal and power splitter (4)
The signals of four tunnel output ends outputs be all input to the inputs of frequency mixer (5), four tunnel output ends of the frequency mixer (5) are all led to
Cross the input of low pass filter (6) connection intermediate frequency amplifier (7), four tunnel output end connections of the intermediate frequency amplifier (7)
FPGA module (2), FPGA module (2) the connection restructing algorithm device (3).
2. broader frequency spectrum monitoring system according to claim 1, it is characterised in that the FPGA module (2) includes ADC
(22) the GTX modules (21) in, GTX modules (21), the FPGA module produce high speed PRBS signal and power splitter (4)
The signals of four tunnel output ends outputs be all input to the inputs of frequency mixer (5), four road inputs of the intermediate frequency amplifier (7)
Connect FPGA module in ADC (22), the GTX modules (21) include data transmission bus, GTX module transmitting terminals and
Enter to go here and there out module.
3. broader frequency spectrum monitoring system according to claim 1, it is characterised in that the signal pre-conditioner module (1) includes
Low-noise amplifier (11), adjustable attenuator (12), amplifier module (13), the low-noise amplifier (11) are declined by adjustable
Subtract the output end connection work(of the amplifier module (13) in device (12) connection amplifier module (13), the signal pre-conditioner module
Divide the input of device (4).
4. broader frequency spectrum monitoring system according to claim 2, it is characterised in that the high speed PRBS signal is used
RocketIO high-speed serial datas transmission technologys is produced.
5. broader frequency spectrum monitoring system according to claim 1, it is characterised in that the frequency mixer (5) uses ADL5801 cores
Piece is designed.
6. broader frequency spectrum monitoring system according to claim 1, it is characterised in that the intermediate frequency amplifier (7) uses
OPA847 chips are designed.
7. broader frequency spectrum monitoring system according to claim 3, it is characterised in that the low-noise amplifier (11) uses
BGB707L7ESD chips are designed.
8. the method for high speed PRBS signal is produced, based on broader frequency spectrum monitoring system described in claim 2, methods described
Comprise the following steps：
(1), with the MATLAB softwares matrix that 4 rows 127 of generation are arranged at random, by every a line random number one cycle of correspondence of matrix
Pseudo-random sequence；
(2) -1 in matrix, is changed into 0 formation pseudo noise code, is stored in FPGA RAM block；
(3), GTX modules start, and are one group by every 16 pseudo noise codes in RAM block, and transmitted in parallel is passed to the data of GTX modules
Defeated bus, obtains parallel data, then by GTX module transmitting terminals go forward side by side go here and there out module parallel data in a serial fashion
Send, obtain high speed PRBS signal.
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| CN201710213321.3A CN107133014B (en) | 2017-04-01 | 2017-04-01 | Broadband spectrum monitoring system and method for generating high-speed pseudo-random sequence signal |
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| CN201710213321.3A CN107133014B (en) | 2017-04-01 | 2017-04-01 | Broadband spectrum monitoring system and method for generating high-speed pseudo-random sequence signal |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107682011A (en) * | 2017-09-26 | 2018-02-09 | 天津光电通信技术有限公司 | A kind of adjustable signal generator of intermediate frequency of signal to noise ratio and implementation method |
| CN107979379A (en) * | 2017-11-20 | 2018-05-01 | 北京工业大学 | Modulation wide-band transducer AFE(analog front end) development board based on compressive sensing theory |
| CN110146842A (en) * | 2019-06-14 | 2019-08-20 | 哈尔滨工业大学 | Signal carrier frequency and two dimension DOA method for parameter estimation based on lack sampling |
| CN111490793A (en) * | 2020-04-10 | 2020-08-04 | 哈尔滨工业大学 | Mixing matrix generation method of modulating broadband converter based on step-type random sequence |
| US20210211335A1 (en) * | 2020-01-08 | 2021-07-08 | Mediatek Singapore Pte. Ltd. | Iq generator for mixer |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1054872A (en) * | 1990-01-09 | 1991-09-25 | Rca许可公司 | Digital interpolation circuitry |
| CN101594163A (en) * | 2008-05-28 | 2009-12-02 | 北京中电华大电子设计有限责任公司 | A kind of method and apparatus of realizing transmitting-receiving based on the zero-if architecture of WLAN |
| CN102109596A (en) * | 2010-12-20 | 2011-06-29 | 南京鹏力科技有限公司 | Wideband linear frequency modulated continuous wave (LFMCW) signal generating device |
| CN102427440A (en) * | 2011-08-25 | 2012-04-25 | 清华大学 | Photon-assisted multi-channel compression sampling (CS) system and method |
| CN103490783A (en) * | 2013-09-29 | 2014-01-01 | 哈尔滨工业大学 | Method for converting analog signals into digital information |
-
2017
- 2017-04-01 CN CN201710213321.3A patent/CN107133014B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1054872A (en) * | 1990-01-09 | 1991-09-25 | Rca许可公司 | Digital interpolation circuitry |
| CN101594163A (en) * | 2008-05-28 | 2009-12-02 | 北京中电华大电子设计有限责任公司 | A kind of method and apparatus of realizing transmitting-receiving based on the zero-if architecture of WLAN |
| CN102109596A (en) * | 2010-12-20 | 2011-06-29 | 南京鹏力科技有限公司 | Wideband linear frequency modulated continuous wave (LFMCW) signal generating device |
| CN102427440A (en) * | 2011-08-25 | 2012-04-25 | 清华大学 | Photon-assisted multi-channel compression sampling (CS) system and method |
| CN103490783A (en) * | 2013-09-29 | 2014-01-01 | 哈尔滨工业大学 | Method for converting analog signals into digital information |
Non-Patent Citations (3)
| Title |
|---|
| M.MISHALI;Y.C.ELDAR等: ""Xampling: Analog to digital at sub-Nyquist rates"", 《IET CIRCUITS,DEVICES&SYSTEMS》 * |
| 王婷: ""用于MWC欠采样系统的伪随机序列发生器研制"", 《中国优秀硕士学位论文全文数据库信息科技辑》 * |
| 黄振: ""稀疏多频带信号的亚奈奎斯特采样与重构算法研究"", 《中国优秀硕士学位论文全文数据库 信息科技辑》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107682011A (en) * | 2017-09-26 | 2018-02-09 | 天津光电通信技术有限公司 | A kind of adjustable signal generator of intermediate frequency of signal to noise ratio and implementation method |
| CN107682011B (en) * | 2017-09-26 | 2024-02-23 | 天津光电通信技术有限公司 | Implementation method of intermediate frequency signal generator with adjustable signal-to-noise ratio |
| CN107979379A (en) * | 2017-11-20 | 2018-05-01 | 北京工业大学 | Modulation wide-band transducer AFE(analog front end) development board based on compressive sensing theory |
| CN110146842A (en) * | 2019-06-14 | 2019-08-20 | 哈尔滨工业大学 | Signal carrier frequency and two dimension DOA method for parameter estimation based on lack sampling |
| US20210211335A1 (en) * | 2020-01-08 | 2021-07-08 | Mediatek Singapore Pte. Ltd. | Iq generator for mixer |
| US11646919B2 (en) * | 2020-01-08 | 2023-05-09 | Mediatek Singapore Pte. Ltd. | IQ generator for mixer |
| CN111490793A (en) * | 2020-04-10 | 2020-08-04 | 哈尔滨工业大学 | Mixing matrix generation method of modulating broadband converter based on step-type random sequence |
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| CN107133014B (en) | 2021-02-12 |
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