CN103152112A - Polarization MIMO channel measurement device with compact structure - Google Patents
Polarization MIMO channel measurement device with compact structure Download PDFInfo
- Publication number
- CN103152112A CN103152112A CN2013100352468A CN201310035246A CN103152112A CN 103152112 A CN103152112 A CN 103152112A CN 2013100352468 A CN2013100352468 A CN 2013100352468A CN 201310035246 A CN201310035246 A CN 201310035246A CN 103152112 A CN103152112 A CN 103152112A
- Authority
- CN
- China
- Prior art keywords
- module
- signal
- chain
- unit
- radio frequency
- 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.)
- Withdrawn
Links
Images
Abstract
The invention aims at providing a set of a channel measurement device which is compact in structure and of which the number of MIMO channels can be flexibly configured. The channel measurement device is used for an indoor or outdoor measurement test of a polarization MIMO channel. The device is mainly based on measurement of time-division duplex, and supports measurement based on a technology of radio frequency optical fiber transmission at the same time. The device comprises a transmitting end and a receiving end, wherein the transmitting end and the receiving end respectively comprises a power source unit, a baseband unit, a radio frequency unit, a control unit and an antenna unit. Each power source unit is used for supplying power for units in the transmitting end and the receiving unit. Each baseband unit is used for producing a baseband signal needed for transmitting and for sampling and storing the baseband signal and transmitting the sampling signal to an external upper computer. Each radio frequency unit is used for modulating the transmitted baseband signal to a frequency band of radio frequency and for demodulating a radio frequency signal to the baseband signal. Each control unit is used for arranging frequency points in the radio frequency unit and setting gains in a transmitting link and a receiving link. Each antenna unit is used for transmitting the radio frequency signal to the sky and receiving the radio frequency signal coming from the sky.
Description
Technical field
The present invention relates to a kind of polarization mimo channel measurement mechanism of cramped construction; Belong to wireless communication technology field.
Background technology
The basic demand of the 4th Generation Mobile Communication System is: the hardware circuit solution that is not less than 100Mbps is provided under the outdoor high-speed mobile environment, and provide the hardware circuit solution that is not less than 1Gbps under indoor or low speed mobile environment, and spectrum efficiency reaches 5～20bps/Hz.This just requires the 4th abundant digging utilization spacing wireless of Generation Mobile Communication System resource, improves the availability of frequency spectrum and power validity.
What future mobile communication system need to be faced simultaneously is higher transmission rate, limited frequency spectrum resource, abominable transmission environment, the lower problems such as transmitting power.The MIMO technology is one of adoptable method that addresses these problems.The channel capacity of mimo system depends mainly on the mimo channel characteristic, and mimo channel characteristic common channels model is described.The mimo channel model has important value to the realization of mimo system accurately, and mimo channel model accurately often needs acquisition is processed and added up to the test data of actual channel.
In recent years, the advantage such as multi-polarization antenna is low with its correlation, size is little has been subject to extensive concern and has probably applied in following mimo system.When analyzing a polarization mimo system, need the model of an accurate polarization mimo channel as the basis of research.At present done many theoretical researches for the analysis of polarization mimo channel capacity, but major part is to carry out under the hypothesis of propagation model when empty already present.Therefore, the channel measurement under true environment becomes particularly important for polarization mimo channel modeling and capacity analysis.
The mimo channel method of measurement can roughly be divided into two classes.A kind of is to utilize special-purpose measuring equipment directly channel to be measured.Antenna that drives with stepper motor of general employing moves and records channel data with certain step-length in certain space, form virtual mimo system, avoided the mutual coupling between antenna, the channel that records like this is more accurate, the channel data that obtains does not rely on antenna used, but equipment is complicated and expensive; Another kind method is directly to use channel estimation technique to obtain channel matrix, also can obtain accurate channel matrix data.But the channel matrix that obtains by channel estimating is relevant to antenna used, can not therefrom isolate the information of clear channel, but can be used for the calibration to existing channel model.
At present, the device major part of surveying the mimo channel experiment is to build with commercial tester, frequency spectrograph+signal source for example, the method is simple and convenient, the mimo channel less for scale can also be suitable for, if MIMO is larger, the method for building measurement mechanism with many instruments will become not and reality.
Summary of the invention
The object of the invention is to, but the means for channel measurement of design one nested structure compactness and MIMO number of active lanes flexible configuration is used for indoor or outdoors polarization mimo channel experiments of measuring.This device mainly based on the measurement of time division duplex (Time Division Duplex, TDD), is also supported the measurement based on radio frequency optical fiber (Radio over fiber, RoF) transmission technology simultaneously.
For solving the problems of the technologies described above, the invention provides a kind of inside with the polarization mimo channel measurement mechanism of the cramped construction of rollback amount.
technical scheme of the present invention is a kind of polarization mimo channel measurement mechanism of cramped construction, comprises transmitting terminal and receiving terminal, described transmitting terminal and receiving terminal include for the power subsystem to the power supply of the unit in transmitting terminal and receiving terminal, for the production of the needed baseband signal of emission and sampling, the storage baseband signal is also transmitted sampled signal to the Base Band Unit of outside host computer, the radio frequency unit of the baseband signal that is used for modulate emission to radio frequency band and demodulation radiofrequency signal to baseband signal, be used for the control unit of the setting of radio frequency unit intermediate-frequeney point and transmitting chain and receiver gain setting and be used for to air-launched radiofrequency signal and the reception antenna element from aerial radiofrequency signal.
Further improvement of the present invention, described antenna element comprises antenna.
further improvement of the present invention, described Base Band Unit comprises the receiving low pass filter that prevents signal aliasing for the interference signal of adulterating in filtering reception signal, be used for filtering the transmit interference signal of interior doping and the transmitting terminal low pass filter of the outer harmonic wave of band, be used for collection signal, the programmable logic device of storage signal and signal transmission, the synchronous DRAM that is used for the digital signal that storage of collected arrives, for receiving terminal analog to digital converter and the transmitting terminal analog to digital converter being responsible for changing between digital signal and analog signal, be used for digital to analog converter the initialization register operation and and host computer between transfer of data with the single-chip microcomputer of USB interface and be used for the host computer of Channel Modeling and performance evaluation, also comprise the phase-locked loop module that is arranged between transmitting terminal analog to digital converter and receiving terminal analog to digital converter.
Further improvement of the present invention, described radio frequency unit comprise emission chain element and receive chain unit; Described emission chain element comprises that successively the emission chain active low-pass filter module, emission chain quadrature demodulator module, emission chain band pass filter, the emission chain that are connected can compile gain amplifier module, emission chain frequency mixer, emission chain band pass filter, emission chain radio-frequency power amplifier, switching over module and be used for signal to air-launched antenna; Described receive chain unit comprises switching over module, receive chain low noise amplifier, receive chain band pass filter, receive chain radio frequency amplifier module, receive chain frequency mixer, receive chain band pass filter, receive chain automatic gain adjusting module, receive chain band pass filter, receive chain quadrature demodulator module and the receive chain low pass filter that is connected successively; Also comprise and be arranged on the radio-frequency (RF) local oscillator module between emission chain frequency mixer and receive chain frequency mixer and be arranged on the intermediate frequency local oscillator module of launching between chain quadrature demodulator module and receive chain quadrature demodulator module.
further improvement of the present invention, described control unit comprises that receiving the host computer instruction is used for arranging the radio-frequency (RF) local oscillator module of radio frequency unit and shaking a little of intermediate frequency local oscillator module, control the gain that the emission chain in transmitting chain can be compiled the gain amplifier module, control the second programmable logic device of the gain of the receive chain automatic gain adjusting module in receiver, what be connected with the second programmable logic device be used for to be responsible for digital signal, the D/A converter module of changing between analog signal provides the constant-temperature crystal oscillator module of reference clock to Base Band Unit and radio frequency unit with being used for of being connected with D/A converter module.
Apparatus of the present invention beneficial effect compared with prior art is:
1) the MIMO number of channels can flexible configuration, and convenient expansion can support that under the highest configuration condition 6 * 6 mimo channel is measured.Poliarizing antenna can arbitrarily be changed, and the hardware unit highly versatile can be for the characteristic of analyzing under different polarization mimo channels;
2) after channel measurement finishes, the data importing host computer carries out data processing and Channel Modeling, has reduced the design complexities of hardware unit;
3) measurement mechanism is take the 3U machine frame as framework, and compact conformation can be arranged on the server machine of standard cashier's office in a shop, the measurement under convenient indoor and outdoor varying environment.
Description of drawings
Fig. 1 is structural representation of the present invention.
Fig. 2 is the theory diagram of Base Band Unit.
Fig. 3 is the theory diagram of radio frequency unit.
Fig. 4 is the theory diagram of control unit.
wherein: 101, power subsystem, 102, Base Band Unit, 201, the first programmable logic device, 202, the transmitting terminal analog to digital converter, 203, the transmitting terminal low pass filter, 205, phase-locked loop module, 206, receiving low pass filter, 207, the receiving terminal analog to digital converter, 208, synchronous DRAM, 209, single-chip microcomputer, 210, host computer, 103, radio frequency unit, 301, emission chain active low-pass filter module, 302, emission chain quadrature demodulator module, 303, emission chain band pass filter, 304, the emission chain can be compiled gain amplifier module, 305, emission chain frequency mixer, 306, emission chain band pass filter, 307, emission chain radio-frequency power amplifier, 308, the switching over module, 309, antenna, 310, the receive chain low noise amplifier, 311, the receive chain band pass filter, 312, receive chain radio frequency amplifier module, 313, the receive chain frequency mixer, 314, the receive chain band pass filter, 315, receive chain automatic gain adjusting module, 316, the receive chain band pass filter, 317, receive chain quadrature demodulator module, 318, the receive chain low pass filter, 319, the intermediate frequency local oscillator module, 320, the radio-frequency (RF) local oscillator module, 104, control unit, 401, the second programmable logic device, 402, the constant-temperature crystal oscillator module, 403, D/A converter module, 105, antenna element.
Embodiment
The present invention is further described for 1-Fig. 4 by reference to the accompanying drawings:
The polarization mimo channel measurement mechanism of cramped construction of the present invention comprises transmitting terminal and receiving terminal.
Transmitting terminal and receiving terminal include power subsystem 101, Base Band Unit 102, radio frequency unit 103, control unit 104 and antenna element 105.As shown in Figure 1
The emission chain element comprises that emission chain active low-pass filter module 301, emission chain quadrature demodulator module 302, emission chain band pass filter 303, emission chain can compile gain amplifier module 304, emission chain frequency mixer 305, emission chain band pass filter 306, emission chain radio-frequency power amplifier 307, switching over module 308 and antenna 309.
The receive chain unit comprises switching over module 308, receive chain low noise amplifier 310, receive chain band pass filter 311, receive chain radio frequency amplifier module 312, receive chain frequency mixer 313, receive chain band pass filter 314, receive chain automatic gain adjusting module 315, receive chain band pass filter 316, receive chain quadrature demodulator module 317, receive chain low pass filter 318, radio-frequency (RF) local oscillator module 320 and the intermediate frequency local oscillator module 319 that is connected successively.
Antenna element 105 of the present invention comprises antenna 309.
Receiving low pass filter 206 of the present invention, transmitting terminal low pass filter 203, the first programmable logic device 201, synchronous DRAM 208, receiving terminal analog to digital converter 207, transmitting terminal analog to digital converter 202, single-chip microcomputer 209, host computer 210 and phase-locked loop module 205 are module of the prior art, the composition that it is concrete, the present invention does not do detailed description.
The first programmable logic device 201 of the present invention is Field-Programmable GateArray of the prior art, and module is referred to as the FPGA module.
Emission chain active low-pass filter module 301 of the present invention, emission chain quadrature demodulator module 302, emission chain band pass filter 303, emission chain can be compiled gain amplifier module 304, emission chain frequency mixer 305, emission chain band pass filter 306, emission chain radio-frequency power amplifier 307, switching over module 308 and antenna 309 and be module of the prior art, the composition that it is concrete, the present invention does not do detailed description.
Receive chain low noise amplifier 310 of the present invention, receive chain band pass filter 311, receive chain radio frequency amplifier module 312, receive chain frequency mixer 313, receive chain band pass filter 314, receive chain automatic gain adjusting module 315, receive chain band pass filter 316, receive chain quadrature demodulator module 317, receive chain low pass filter 318, radio-frequency (RF) local oscillator module 320 and intermediate frequency local oscillator module 319 are module of the prior art, the composition that it is concrete, the present invention does not do detailed description.
The second programmable logic device 401 of the present invention, D/A converter module 403 and constant-temperature crystal oscillator module 402 are module of the prior art, the composition that it is concrete, and the present invention does not do detailed description.
The second programmable logic device 401 of the present invention is Complex Programmable LogicDevice module of the prior art, is called for short the CPLD module.
the polarization mimo channel measurement mechanism of a kind of cramped construction of the present invention comprises transmitting terminal and receiving terminal, described transmitting terminal and receiving terminal include for a power subsystem 101 of powering to a unit of giving in transmitting terminal and receiving terminal, for the production of the needed baseband signal of emission and sampling, the storage baseband signal is also transmitted sampled signal to the Base Band Unit 102 of outside host computer, the radio frequency unit 103 of the baseband signal that is used for modulate emission to radio frequency band and demodulation radiofrequency signal to baseband signal, be used for the control unit 104 of the setting of radio frequency unit intermediate-frequeney point and transmitting chain and receiver gain setting and be used for to air-launched radiofrequency signal and the reception antenna element 105 from aerial radiofrequency signal.
Embodiment:
The polarization mimo channel measurement mechanism of a kind of cramped construction of the present invention is based on the TDD art designs, supports simultaneously the measurement of RoF transmission, and the MIMO number of channels can flexible configuration, measurement mechanism compact conformation, indoor and outdoor wireless channel convenient test.
For making the purpose, technical solutions and advantages of the present invention clearer, at first the structure of polarization mimo channel measurement mechanism of the present invention is done an explanation in detail below in conjunction with accompanying drawing 1-4, and then the receiving-transmitting chain signal flow of measurement mechanism is described in further detail.
The concrete package assembly of the polarization mimo channel measurement mechanism of a kind of cramped construction of the present invention:
Polarization mimo channel measurement mechanism of the present invention is assembled in a 3U machine frame, comprise transmitting terminal Tx and receiving terminal Rx two sub-systems, all comprise power subsystem 101, Base Band Unit 102, radio frequency unit 103, control unit 104 and antenna element 105 in every sub-systems, one of them Base Band Unit 102 and a radio frequency unit 103 consist of a transceiver link, according to the difference of MIMO transceiver channel number, can flexible configuration Base Band Unit 102 and the quantity of radio frequency unit 103.
The present invention is except antenna element 105, and the equal side of other all subelements is inserted on a backboard electronic circuit and realizes electrical interconnection.Antenna element 105 is connected with radio frequency unit by the radio-frequency (RF) coaxial line.
Receiving-transmitting chain signal flow of the present invention is as described below:
Transmitting chain:
Base band electronic circuit: after resetting, the chu sequence symbol waveform of the ROM cell stores in FPGA module 201 begins to play, digital signal enters transmitting terminal digital to analog converter 202 and generates base-band analog signals, analog signal enter the outer harmonic wave of transmitting terminal low pass filter 203 filtering bands produce needed Analog Baseband in the same way/quadrature (I/Q) signal.Clock phase-locked loop module 205 offers the needed sampling clock of transmitting terminal D/A converter module 202.
The signal creating method of other passage base band electronic circuits is similar with it, and different is that the chu sequence waveform of storing in the FPGA module of back passage is different, is the cyclic shift of last passage successively, to guarantee the orthogonality between each passage.
Radio frequency unit: the baseband I/Q signal of generation is by emission chain active low-pass filter module 301, enter emission chain quadrature demodulator module 302 and be modulated to intermediate frequency, emission chain active low-pass filter module 301 is comprised of the difference amplifier, provide the I/Q differential signal of a suitable DC common mode to output, to satisfy the requirement of emission chain quadrature demodulator module 302.Common-mode voltage and i/q signal amplitude, phase place are carried out carrier leak and the suppress sideband that suitable adjustment can improve output signal.The high price frequency spectrum that intermediate-freuqncy signal produces by emission chain band pass filter 303 filtering modulators subsequently then enters the emission chain and can compile gain amplifier module 304, and the emission chain can be compiled gain amplifier module 304 and be comprised of fixed gain amplifier and step attenuator.Enter afterwards emission chain frequency mixer 305 and be mixed to for the second time radio frequency band, radiofrequency signal is through 306 filtering of emission chain band pass filter module, enter emission chain radio-frequency power amplifier module 307 and amplify, by switching over module 308 at last by antenna 309 to the air-launched radiofrequency signal.Radio-frequency (RF) local oscillator module 320 and intermediate frequency local oscillator module 319 are completed respectively the configuration to radio-frequency (RF) local oscillator and intermediate frequency local oscillator frequency.
Receiver:
Radio frequency unit: received by antenna 309 from aerial radiofrequency signal, enter receive chain low noise amplifier module 310 by switching over module 308, then select frequency range by receive chain band pass filter 311, then suitably amplify through receive chain radio frequency amplifier module 312, enter receive chain mixer module 313 and carry out mixing, then by receive chain band pass filter 314 selector channels, and then enter receive chain automatic gain adjusting module 315, according to the size of the power adjustment of input signal gain.Then be demodulated to baseband I/Q signal by entering receive chain quadrature demodulator module 317 after receive chain band pass filter 316, enter the base band electronic circuit finally by mistake receive chain low pass filter 318 and sample, prevent signal aliasing.System works is under tdd mode, so receiver is identical with IF spot with RF spot in transmitting chain.
Base Band Unit: baseband I/Q signal enters receiving terminal analog-to-digital conversion module 207 through receiving low pass filter 206 and samples, the digital signal of sampling enters first-in first-out memory cell (the Fist In First Out in FPGA module 201, FIFO) in, FIFO writes completely and writes immediately in SDRAM memory module 208 after half.The SDRAM that the SDRAM memory module is 512Mbit by 2 memory capacity forms.FIFO reads and the speed of write memory module will write higher than D/A converter module the speed of FIFO, thereby guarantees that FIFO can not overflow in whole process.After SDRAM was filled with, data changed in one-chip computer module 209 through the another one FIFO in FPGA, pass in host computer 210 by usb bus at last, complete in Channel Modeling and the performance estimation Matlab software in host computer 210.Clock phase-locked loop module 205 offers the needed sampling clock of analog-to-digital conversion module 202.
Control electronic circuit: constant-temperature crystal oscillator module 402 provides high performance 10MHz reference clock for Base Band Unit and radio frequency unit, the FREQUENCY CONTROL that CPLD module 401 can realize the constant-temperature crystal oscillator module by D/A converter module 403 after receiving from the frequency trim instruction of host computer 210.In addition, the CPLD module can also receive other dependent instructions of host computer 210, complete the frequency point setting of radio-frequency (RF) local oscillator module 320 and intermediate frequency local oscillator module 319 in the radio frequency electronic circuit, and the emission chain in transmitting chain can be compiled the setting of step attenuator in receive chain automatic gain adjusting module 315 in gain amplifier module 304 and receiver.
Above demonstration and described basic principle of the present invention and principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; that describes in above-described embodiment and specification just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (5)
1. the polarization mimo channel measurement mechanism of a cramped construction, is characterized in that: comprise transmitting terminal and receiving terminal, described transmitting terminal and receiving terminal include for the power subsystem (101) to the power supply of the unit in transmitting terminal and receiving terminal, for the production of the needed baseband signal of emission and sampling, the storage baseband signal is also transmitted sampled signal to the Base Band Unit (102) of outside host computer, the radio frequency unit (103) of the baseband signal that is used for modulate emission to radio frequency band and demodulation radiofrequency signal to baseband signal, be used for the control unit (104) of the setting of radio frequency unit intermediate-frequeney point and transmitting chain and receiver gain setting and be used for to air-launched radiofrequency signal and the reception antenna element (105) from aerial radiofrequency signal.
2. the polarization mimo channel measurement mechanism of cramped construction according to claim 1, it is characterized in that: described antenna element (105) comprises antenna (309).
3. the polarization mimo channel measurement mechanism of cramped construction according to claim 1, it is characterized in that: described Base Band Unit (102) comprises the receiving low pass filter (206) that prevents signal aliasing for the interference signal of adulterating in filtering reception signal, be used for filtering the transmit interference signal of interior doping and the transmitting terminal low pass filter (203) of the outer harmonic wave of band, be used for collection signal, first programmable logic device (201) of storage signal and signal transmission, the synchronous DRAM (208) that is used for the digital signal that storage of collected arrives, for the receiving terminal analog to digital converter (207) and transmitting terminal analog to digital converter (202) being responsible for changing between digital signal and analog signal, be used for digital to analog converter the initialization register operation and and host computer between transfer of data the single-chip microcomputer with USB interface (209) and be used for the host computer (210) of Channel Modeling and performance evaluation, also comprise the phase-locked loop module (205) that is arranged between transmitting terminal analog to digital converter (202) and receiving terminal analog to digital converter (207).
4. the polarization mimo channel measurement mechanism of cramped construction according to claim 1 is characterized in that: described radio frequency unit (103) comprises emission chain element and receive chain unit; described emission chain element comprises the emission chain active low-pass filter module (301) that is connected successively, emission chain quadrature demodulator module (302), emission chain band pass filter (303), the emission chain can be compiled gain amplifier module (304), emission chain frequency mixer (305), emission chain band pass filter (306), emission chain radio-frequency power amplifier (307), switching over module (308) and being used for signal to air-launched antenna (309), described receive chain unit comprises the switching over module (308) that is connected successively, receive chain low noise amplifier (310), receive chain band pass filter (311), receive chain radio frequency amplifier module (312), receive chain frequency mixer (313), receive chain band pass filter (314), receive chain automatic gain adjusting module (315), receive chain band pass filter (316), receive chain quadrature demodulator module (317) and receive chain low pass filter (318), also comprise and be arranged on the radio-frequency (RF) local oscillator module (320) between emission chain frequency mixer (305) and receive chain frequency mixer (313) and be arranged on the intermediate frequency local oscillator module (319) of launching between chain quadrature demodulator module (302) and receive chain quadrature demodulator module (317).
5. the polarization mimo channel measurement mechanism of cramped construction according to claim 1, it is characterized in that: described control unit (104) comprises that receiving host computer (210) instruction is used for arranging the radio-frequency (RF) local oscillator module (320) of radio frequency unit (103) and shaking a little of intermediate frequency local oscillator module (319), emission chain in the control transmitting chain can be compiled the gain of gain amplifier module (304), control second programmable logic device (401) of the gain of the receive chain automatic gain adjusting module (315) in receiver, what be connected with the second programmable logic device (401) be used for to be responsible for digital signal, the D/A converter module of changing between analog signal (403) and the constant-temperature crystal oscillator module (402) that is used for providing reference clock to Base Band Unit (102) and radio frequency unit (103) that is connected with D/A converter module (403).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100352468A CN103152112A (en) | 2013-01-29 | 2013-01-29 | Polarization MIMO channel measurement device with compact structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100352468A CN103152112A (en) | 2013-01-29 | 2013-01-29 | Polarization MIMO channel measurement device with compact structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103152112A true CN103152112A (en) | 2013-06-12 |
Family
ID=48550004
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013100352468A Withdrawn CN103152112A (en) | 2013-01-29 | 2013-01-29 | Polarization MIMO channel measurement device with compact structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103152112A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106656253A (en) * | 2016-12-08 | 2017-05-10 | 南京信息工程大学 | Ka-band MIMO transceiving device for cloud target detection experiment |
| CN108141259A (en) * | 2015-09-30 | 2018-06-08 | 美国国家仪器有限公司 | Scalable extensive MIMO receiver |
| CN111817744A (en) * | 2020-07-17 | 2020-10-23 | 盐城工学院 | Distributed radio frequency electronic system and signal processing method |
| CN114814965A (en) * | 2022-07-01 | 2022-07-29 | 河北帝斯杰奥科技有限公司 | Method and device for measuring earth polarization excimer radiation |
-
2013
- 2013-01-29 CN CN2013100352468A patent/CN103152112A/en not_active Withdrawn
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108141259A (en) * | 2015-09-30 | 2018-06-08 | 美国国家仪器有限公司 | Scalable extensive MIMO receiver |
| CN108141259B (en) * | 2015-09-30 | 2021-05-18 | 美国国家仪器有限公司 | Scalable massive MIMO receiver |
| CN106656253A (en) * | 2016-12-08 | 2017-05-10 | 南京信息工程大学 | Ka-band MIMO transceiving device for cloud target detection experiment |
| CN111817744A (en) * | 2020-07-17 | 2020-10-23 | 盐城工学院 | Distributed radio frequency electronic system and signal processing method |
| CN114814965A (en) * | 2022-07-01 | 2022-07-29 | 河北帝斯杰奥科技有限公司 | Method and device for measuring earth polarization excimer radiation |
| CN114814965B (en) * | 2022-07-01 | 2022-09-27 | 河北帝斯杰奥科技有限公司 | Method and device for measuring earth polarization excimer radiation |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102624439B (en) | Integrated detection equipment for pico-satellite | |
| CN101252398B (en) | Spread-spectrum signal source with Doppler analogue function | |
| CN103248444B (en) | System integration method for test parameters based on unit combination | |
| CN110596657B (en) | Device for testing operation of distance measuring machine/Takang | |
| CN104754093A (en) | Test device, system and method | |
| CN103152112A (en) | Polarization MIMO channel measurement device with compact structure | |
| CN102751998A (en) | Data intermediate frequency module based on software radio receiver | |
| CN102217217B (en) | Method and apparatus for detecting pim position | |
| CN103873132A (en) | PXIe bus-based satellite communication system simulator | |
| CN107294627A (en) | A kind of system test, aging method and system for RRU | |
| CN110139209A (en) | A kind of vehicle module for 5G communication optimization | |
| CN206060731U (en) | Multichannel digital signal processing platform | |
| CN104459726A (en) | Interference signal generator | |
| CN110221261A (en) | A kind of radar waveform generation module method for testing and analyzing and device | |
| CN109783418A (en) | A kind of broadband signal high speed acquisition and Waveform storage analysis system | |
| CN203151504U (en) | Compact-structure polarized MIMO channel measuring device | |
| CN208172243U (en) | A kind of digital array module interactive mode detection device | |
| CN202488718U (en) | ZigBee wireless positioning system device with electronic label function | |
| CN107294630B (en) | Simulation test system of carrier wave-micropower dual-mode module | |
| CN206440829U (en) | One kind miniaturization satellite navigation signals generation board | |
| CN111404591B (en) | Satellite load ground test equipment and method | |
| CN105225455B (en) | A kind of turntable wireless proximity telemetry system | |
| CN204068988U (en) | A kind of number transmission transmitter semi-physical simulation demo plant | |
| CN207318720U (en) | Position time service satellite communication terminal | |
| CN102412914B (en) | PXI bus-based radio frequency real-time measurement vector analysis plug-in structural module |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C04 | Withdrawal of patent application after publication (patent law 2001) | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20130612 |