CN208272959U

CN208272959U - A kind of ultra-high speed sampling processing broad-band receiver

Info

Publication number: CN208272959U
Application number: CN201820902385.4U
Authority: CN
Inventors: 张君
Original assignee: Yangzhou Jianxing Electronic Technology Co Ltd
Current assignee: Yangzhou Jianxing Electronic Technology Co Ltd
Priority date: 2018-06-12
Filing date: 2018-06-12
Publication date: 2018-12-21
Anticipated expiration: 2028-06-12

Abstract

The utility model discloses a kind of ultra-high speed samplings in microwave receiving field to handle broad-band receiver, including microwave front-end, the microwave front-end is connected with power splitter, power splitter is connected with SDLVA and casacade multi-amplifier respectively, and the SDLVA and casacade multi-amplifier are connected with ultra-high speed sampling processing board；The ultra-high speed sampling processing board includes low speed ADC and high-speed ADC, and the SDLVA is connected with low speed ADC, and the casacade multi-amplifier is connected with high-speed ADC, and low speed ADC and high-speed ADC are connected with fpga chip；The direct digitization to radiofrequency signal is realized at microwave end, directly digital signal is handled, this has just skipped radio frequency to the conversion process of intermediate frequency, and introducing harmonic wave is avoided to lead to the spuious increase of signal, the performance of receiver is improved, the utility model can be used for the reception of microwave signal.

Description

A kind of ultra-high speed sampling processing broad-band receiver

Technical field

The utility model relates to receiver, in particular to a kind of microwave receiver.

Background technique

Currently, being faced with complicated electromagnetic environment in modern microwave reception system, receiver is needed in wide band range Inside accurately measure the information such as carrier frequency, pulsewidth, the amplitude of radar signal, for complete to radar signal sorting identification and to thunder Up to effective interference in real time.In order to effectively transmit information in an air traffic channel full of noise, transmitter needs to carry Have in the signal modulation to radio-frequency carrier of information.The function of microwave receiver be demodulate the signal through ovennodulation, meanwhile, protect again Demonstrate,prove enough signal-to-noise ratio.Due to particularity of wireless transmission environments, such as multipath effect, path loss, time variation etc., cause to make an uproar Sound and interference are ubiquitous, and the performance of microwave receiver is just particularly important.Signal bandwidth and frequency spectrum directly affect radio frequency receipts The structure of module and the design of circuit module, the loss and decline of signal are sent out, so that signal amplitude rises and falls interior on a large scale, thus It is required that transmitter carries out power control and the good linearity of receiver, it is very faint due to receiving signal, it is also necessary to receiver There is higher sensitivity.But the analog-to-digital conversion of digital receiver is usually to complete in intermediate frequency in the prior art, intermediate-freuqncy signal phase Than the radiofrequency signal received in antenna, harmonic wave is introduced, causes signal miscellaneous by frequency conversion and the non-linear process filtered It dissipates and increases, influence performance.

Utility model content

The purpose of the utility model is to provide a kind of ultra-high speed samplings to handle broad-band receiver, realizes pair at microwave end The direct digitization of radiofrequency signal, is directly handled digital signal, this has just skipped radio frequency to the conversion process of intermediate frequency, is kept away Exempting from introducing harmonic wave leads to the spuious increase of signal, improves the performance of receiver.

To achieve the above object, the utility model provides a kind of ultra-high speed sampling processing broad-band receiver, including micro- Wavefront end, the microwave front-end are connected with power splitter, and power splitter is connected with SDLVA and casacade multi-amplifier respectively, the SDLVA And casacade multi-amplifier is connected with ultra-high speed sampling processing board；The ultra-high speed sampling processing board includes low speed ADC and high speed ADC, the SDLVA are connected with low speed ADC, and the casacade multi-amplifier is connected with high-speed ADC, low speed ADC and high-speed ADC with Fpga chip is connected.

Compared with prior art, the beneficial effects of the utility model are, the radio frequency of externally input 2~18GHz bandwidth Signal divides two-way after microwave front-end, through power splitter function, is directly fed to SDLVA all the way and guarantees that the linear video amplitude of Larger Dynamic is defeated Ultra-high speed sampling processing board is given out, and another way gives ultra-high speed sampling processing board quantification treatment by multistage amplification output, and by rear The fpga chip at end completes the instantaneous frequency measurement of continuous-flow type, provides the frequency, amplitude and temporal information of signal, synchronizes and is fitted digital ratio The amplitude of amplitude and SDLVA that special receiver calculates does amplitude-frequency correction simultaneously, it is ensured that the accuracy of amplitude measurement, in microwave end reality The direct digitization to radiofrequency signal is showed, directly digital signal has been handled, this has just skipped the transformation of radio frequency to intermediate frequency Process avoids introducing harmonic wave from leading to the spuious increase of signal, improves the performance of receiver, the utility model can be used for micro- The reception of wave signal.

The microwave front-end includes switch filter group, the switch filtering as a further improvement of the utility model, Device group is connected with low noise balanced device, and low noise balanced device is connected with power splitter, the fpga chip and switch filter group phase Even, in this way, can be filtered in this way to received microwave signal, low noise and equilibrium treatment, and sampling processing plate can To control signal to filtered switch device group, high power CW wave is filtered out, to enhance receiver in the adaptability of complex electromagnetic environment.

The fpga chip outputs and inputs LVDS through interface isolating chip one as a further improvement of the utility model, And fpga chip receives two luminous fibres with two through photoelectric conversion module and is connected, and for realizing PDW high-speed transfer, can pass through in this way Interface isolating chip protects device (or people) from the harm of high voltage, and guarantees PDW high-speed transfer, while demand connects it His board also can connect host computer by common module (such as optical fiber turns kilomega network module) and directly use.

The fpga chip is through interface isolating chip two and RS232 serial ports one as a further improvement of the utility model, And CAN interface is connected, and can calibrate, debug use by reserved 100,000,000 nets, serial ports, CAN interface in this way.

The fpga chip connect 100,000,000 with RS232 serial ports two through ARM chip as a further improvement of the utility model, Net, for controlling the powering on of ultra-high speed sampling processing board, self-test and monitoring process, and by ARM chip to fpga chip In core algorithm do on-line debugging, good monitoring and protection can be carried out to ultra-high speed sampling processing board, greatly reduced The failure rate of ultra-high speed sampling processing board, further improves the performance of ultra-high speed sampling processing board.

The fpga chip is connected through high-speed ADC with clock chip as a further improvement of the utility model, clock core Piece is connected with coherent clock, and the power supply and coherent clock of the microwave front-end walk same port, can in this way when multimode group battle array It is realized and is synchronized using input coherent clock, single module work uses onboard clock, realizes that the hot-swappable of homologous clock (has outer input Clock is synchronous mode, without then with the driving of onboard clock), and microwave front-end power supply and outer synchronised clock walk same port, Simplify hardware.

Pass through SMP between the microwave front-end and ultra-high speed sampling processing board as a further improvement of the utility model, Connector connection, it is more stable can to guarantee that microwave front-end is connected with ultra-high speed sampling processing board in this way.

Detailed description of the invention

Fig. 1 is the utility model attachment structure schematic diagram.

Fig. 2 is the connection figure of ultra-high speed sampling processing board in the utility model.

Fig. 3 is that synchronised clock, output front end power supply multiplex circuit figure are inputted in the utility model.

Specific embodiment

The present invention will be further described with reference to the accompanying drawing:

A kind of ultra-high speed sampling as shown in Figs. 1-3 handles broad-band receiver, including microwave front-end, microwave front-end and function Point device is connected, and power splitter is connected with SDLVA and casacade multi-amplifier respectively, SDLVA and casacade multi-amplifier and ultra-high speed sampling Processing board is connected；Ultra-high speed sampling processing board includes low speed ADC and high-speed ADC, and SDLVA is connected with low speed ADC, multistage amplification Device is connected with high-speed ADC, and low speed ADC and high-speed ADC are connected with fpga chip；

Microwave front-end includes switch filter group, and switch filter group is connected with low noise balanced device, low noise balanced device It is connected with power splitter, fpga chip is connected with switch filter group；Fpga chip is output and input through interface isolating chip one LVDS and fpga chip receive two luminous fibres with two through photoelectric conversion module and are connected, for realizing PDW high-speed transfer；Fpga chip It is connected through interface isolating chip two with RS232 serial ports one and CAN interface.

Fpga chip connect 100,000,000 nets with RS232 serial ports two through ARM chip, for controlling ultra-high speed sampling processing board Electricity, self-test and monitoring process, and on-line debugging is done to the core algorithm in fpga chip by ARM chip；Fpga chip It is connected through high-speed ADC with clock chip, clock chip is connected with coherent clock, and power supply and the coherent clock of microwave front-end are walked same Port；It is connected between microwave front-end and ultra-high speed sampling processing board by SMP connector.

In the utility model, the radiofrequency signal of externally input 2~18GHz bandwidth through microwave front-end (switch filter group, Low noise balanced device) after, function divides two-way, is directly fed to SDLVA all the way and guarantees that the linear video amplitude of Larger Dynamic is exported to digital ratio Special sampling processing plate, another way give single-bit sampling processing plate quantification treatment by multistage amplification output, and sampling processing plate can be given Switch filter group controls signal, high power CW wave is filtered out, to enhance the adaptability of complex electromagnetic environment；At ultra-high speed sampling It manages plate directly to quantify the radiofrequency signal of 2~18GHz bandwidth using the direct quantification technique of number, and is completed by the FPGA of rear end The instantaneous frequency measurement of continuous-flow type provides the frequency, amplitude and temporal information of signal, width that is synchronous and being fitted the calculating of single-bit receiver The amplitude of degree and SDLVA do amplitude-frequency correction simultaneously, it is ensured that the accuracy of amplitude measurement；When multimode group battle array, using input phase Ref clock, which is realized, to be synchronized, and single module work uses onboard clock；Board reserved two receives two hair optical fiber interface (wavelength 850nm, highests Compatible 10G) and LVDS input and output can be carried out according to demand customized to connect other plates for realizing PDW high-speed transfer Card also can connect host computer by common module (such as optical fiber turns kilomega network module) and directly use；Reserved 100,000,000 nets, serial ports, CAN Bus interface is for calibrating, debug use；Ultra-high speed sampling chip distance microwave end is as short as possible；Microwave single ended input switchs to difference Divide input, promotes anti-interference ability, while difference cabling Striking symmetry；Rogers RO4350B plate making sheet is chosen, guarantees high frequency Performance, while surface gold-plating is handled；Guarantee microwave front-end and sampling processing plate stable connection using high-quality SMP connector, it can be with Guarantee that microwave signal is directly entered circuit board bring signal integrity；Using the multichannel GTX of fpga chip to the original of acquisition Digital signal does reduction of speed, serioparallel exchange processing；High speed GTX signal routing does stringent equal length treatment, while guaranteeing terminal coupling； Because the processing of different boards is there are fine difference, alignment compensation need to be done to multichannel GTX using algorithm in fpga chip, it in this way can be with Guarantee high-rate digital transmission；2 light emitting modules are received using the high speed 2 of the compatible 10G of highest and use high speed LVDS differential signal, it can To guarantee the high-speed transfer of PDW；An onboard ferroelectric memory, can record ARM chip in real time in ultra-high speed sampling processing board Obtained in temperature, voltage, the information such as electric current, in case failure after look into use.

The utility model uses 40GHz ultra-high speed sampling processing circuit plate, has skipped the part that radio frequency turns intermediate frequency, directly right Radiofrequency signal carries out sampling processing, and structure is simplified, low in energy consumption and small in size, has wider array of application scenarios；The single module used time, Can be used as electromagnetic environment monitor, cooperate high speed PDW coffret, can be realized by the upper computer software at the end PC signal Waterfall plot, The real-time display of the results such as frequency spectrum, sorting updates, and since module board card is small in size, small power consumption is easily used as portable equipment；It is more The main battle array of module has both real-time microwave control ability in use, because its is small in size, small power consumption, rich interface, can flexibly be used in whole On machine.

The utility model is not limited to the above embodiment, on the basis of the technical solution of the disclosure, the technology of this field According to disclosed technology contents, some of which technical characteristic can be made personnel by not needing creative labor Replacement and deformation, these replacements and deformation are within the protection scope of the present utility model.

Claims

1. a kind of ultra-high speed sampling handles broad-band receiver, including microwave front-end, it is characterised in that: the microwave front-end and function Point device is connected, and power splitter is connected with SDLVA and casacade multi-amplifier respectively, the SDLVA and casacade multi-amplifier and ultrahigh speed Sampling processing plate is connected；

The ultra-high speed sampling processing board includes low speed ADC and high-speed ADC, and the SDLVA is connected with low speed ADC, described more Grade amplifier is connected with high-speed ADC, and low speed ADC and high-speed ADC are connected with fpga chip.

2. a kind of ultra-high speed sampling according to claim 1 handles broad-band receiver, it is characterised in that: before the microwave End includes switch filter group, and the switch filter group is connected with low noise balanced device, low noise balanced device and power splitter phase Even, the fpga chip is connected with switch filter group.

3. a kind of ultra-high speed sampling according to claim 2 handles broad-band receiver, it is characterised in that: the FPGA core Piece outputs and inputs LVDS through interface isolating chip one and fpga chip receives two luminous fibres with two through photoelectric conversion module and is connected, For realizing PDW high-speed transfer.

4. a kind of ultra-high speed sampling according to claim 3 handles broad-band receiver, it is characterised in that: the FPGA core Piece is connected through interface isolating chip two with RS232 serial ports one and CAN interface.

5. a kind of ultra-high speed sampling according to claim 4 handles broad-band receiver, it is characterised in that: the FPGA core Piece connect 100,000,000 nets with RS232 serial ports two through ARM chip, for controlling the powering on of ultra-high speed sampling processing board, self-test, Yi Jijian Flow control journey, and on-line debugging is done to the core algorithm in fpga chip by ARM chip.

6. a kind of ultra-high speed sampling processing broad-band receiver described in -5 any one according to claim 1, it is characterised in that: The fpga chip is connected through high-speed ADC with clock chip, and clock chip is connected with coherent clock, the power supply of the microwave front-end Same port is walked with coherent clock.

7. a kind of ultra-high speed sampling processing broad-band receiver described in -5 any one according to claim 1, it is characterised in that: It is connected between the microwave front-end and ultra-high speed sampling processing board by SMP connector.