CN201465562U

CN201465562U - Two-channel digital radiofrequency storage board

Info

Publication number: CN201465562U
Application number: CN2009201090211U
Authority: CN
Inventors: 李云杰; 史宏飞; 孙国营; 江海清
Original assignee: Beijing Institute of Technology BIT
Current assignee: Beijing Institute of Technology BIT
Priority date: 2009-06-29
Filing date: 2009-06-29
Publication date: 2010-05-12
Anticipated expiration: 2019-06-29

Abstract

The utility model relates to a two-channel digital radiofrequency storage board, belonging to the technical field of data storage and comprising a power module, an ADC data collection module, a DAC data playback module, a DDR2 storage module, an FPGA collection control module, an FPGA playback control module, a DSP communication control module, an analog signal input interface module, an analog signal output interface module, a PCI interface module, a Rapid IO interface module and a self-defined bus interface module. The two-channel digital radiofrequency storage board is provided with two signal collection, treatment and playback branches, and each branch has the sampling rate of 1.2GSPS and the playback velocity of 1.2GSPS, also has a plurality of signal collection, treatment and playback modes and a plurality of data transmission modes and can fulfill functions of storage and transmission of signals with higher frequency, therefore, the utility model is suitable for the fields of radar and electronic warfare confrontation.

Description

Two-channel digital radio-frequency memory board

Technical field

The utility model relates to a kind of two-channel digital radio-frequency memory board, belongs to technical field of data storage.

Background technology

The digital RF memory technology has storage and reproduction to the frequency higher signal based on high-speed sampling technology and digital storage technique, is widely used in radar and electronic warfare antagonism field.

Existing digital radio-frequency memory board sampling and playback rate below 500MSPS, can not satisfy the requirement of the collection stores processor playback of present hundred MHz even GHz broadband signal mostly.And can be operated in the digital radio-frequency memory board of GSPS speed, majority has only a data collection, processing, playback channels, can't adapt to the application scenario of multichannel broadband signal.

Summary of the invention

The purpose of this utility model is to use hardware modules such as ADC, DAC, FPGA, DSP, DDR2 to make up a kind of two-channel digital radio-frequency memory board with ultra-high-speed data acquisition, processing, playback capability, can realize functions such as various acquisition controlling, data storage, data processing, data transmission, data readback neatly, and flexible configuration is applied to single channel/two-way/four circuit-switched data collections, stores processor and single channel/two-way data readback according to the actual requirements.

A kind of two-channel digital radio-frequency memory board that the utility model is related, comprise power module, analog input interface module, adc data acquisition module, FPGA acquisition control module, FPGA playback controls module, DAC data readback module, analog signal output interface module, DDR2 memory module, DSP communication control module, pci interface module, RapidIO interface module, self-defined bus interface module, the annexation of each functional module as shown in Figure 1, wherein:

Power module is used for that each functional module provides operating voltage on plate;

The analog input interface module links to each other with the adc data acquisition module, is responsible for receiving the simulating signal of outside input and exporting to the adc data acquisition module;

The adc data acquisition module comprises two adc datas collection submodules, is responsible for the simulating signal that the transmission of analog input interface module comes is converted to digital signal at high speed and exports to the FPGA acquisition control module;

The FPGA acquisition control module comprises two FPGA acquisition controlling submodules, be responsible for finishing buffer memory and processing to the data of adc data acquisition module input, data after the FPGA acquisition control module is handled can be exported to FPGA playback controls module and be used for data readback, also can export to the DSP communication control module and then offer host computer, can also be stored in the DDR2 memory module;

FPGA playback controls module links to each other with DSP communication control module, FPGA acquisition control module and DAC data readback module respectively, be responsible for the data processing that DSP communication control module or FPGA acquisition control module are provided and be transferred to DAC data readback module, thereby realize the playback of data;

DAC data readback module comprises two DAC data readback submodules, and the digital signal that being responsible for receiving FPGA playback controls module provides also is converted to simulating signal at high speed and exports to the analog signal output interface module;

The analog signal output interface module is responsible for receiving the two-way simulating signal of DAC data readback module output and exporting to the integrated circuit board outside;

The DDR2 memory module comprises two DDR2 sub module stored, links to each other with the DSP communication control module with the FPGA acquisition control module respectively, is used for the data of storage of collected and playback;

The DSP communication control module is responsible for controlling the work of whole integrated circuit board, this module except with the FPGA acquisition control module with FPGA playback controls module links to each other, also realize and outside high-speed data channel by pci interface module and RapidIO interface module;

The pci interface module links to each other with the DSP communication control module, is responsible for the PCI passage between realization memory board and the host computer;

The RapidIO interface module links to each other with the DSP communication control module, is responsible for realizing memory board and outside high logarithmic data passage;

The self-defined bus interface module links to each other with the FPGA acquisition control module, can give outside integrated circuit board with the direct high-speed transfer of data of FPGA acquisition control module output.

For finishing the sampling rate of GSPS, the adc data acquisition module comprises two binary channels 1GSPS ADC chips (sampling that interweaves can reach the sampling rate of 1.2GSPS), the high-speed data of gathering is through adc data acquisition module self shunting reduction of speed, enters the FPGA acquisition control module and finishes buffer-stored to high-speed data.The data that buffer memory gets off can deposit the DDR2 memory module in, also can send into FPGA playback controls module after treatment, are used for the playback of DAC data readback module.The DSP communication control module is responsible for communicating by letter with host computer by the pci interface module, and the command information and the data of host computer are mail to FPGA acquisition control module and FPGA playback controls module, and perhaps data that integrated circuit board is gathered and status information transmission are to host computer.

Beneficial effect:

Based on above technical scheme, this two-channel digital radio-frequency memory board has two bars acquisition process playback branch roads.Every branch road has the sampling rate of 1.2GSPS, 1.2GSPS playback rate, and have multiple signal acquisition process playback mode and data transfer mode, can realize the storage and the forwarding capability of frequency higher signal, be widely used in radar and electronic warfare antagonism field.

Description of drawings

Fig. 1 is a two-channel digital radio-frequency memory board functional block diagram of the present utility model;

Fig. 2 is the functional block diagram of a kind of embodiment of the present utility model.

Embodiment

Below in conjunction with accompanying drawing and embodiment the utility model is done and to be described in further detail:

A kind of two-channel digital radio-frequency memory board comprises two relatively independent data acquisition process playback branch roads, becomes a left side and handles branch road and the right branch road of handling.As shown in Figure 2, processing branch road in a left side comprises: a slice is as the ADC-L chip of adc data acquisition module, and model is AT84AD001BITD; A slice is as the V4-L chip of FPGA acquisition control module, and model is XC4VSX55; A slice is as the DAC-L chip of DAC data readback module, and model is AD9736BBC.The right branch road of handling comprises: a slice is as the ADC-R chip of adc data acquisition module, and model is AT84AD001BITD; A slice is as the V4-R chip of FPGA acquisition control module, and model is XC4VSX55; A slice is as the DAC-R chip of DAC data readback module, and model is AD9736BBC.These two the relatively independent shared a slice V5 chips of data acquisition process playback branch road are as FPGA playback controls module, and model is XC5VLX30.

CLK chip among Fig. 2 is a slice 6 channel clock chips, the outside 10MHz sinusoidal signal that CLK_IN provides is carried out phase-locked frequency demultiplication, or the external high frequency sinusoidal signal that CLK_IN provides carried out direct frequency division, produce the high-speed-differential clock, offering ADC-L and ADC-R chip and DAC-L and DAC-R chip use .TRIG_IN is the trigger collection signal that the outside offers V4-L and V4-R.

The input signal of each branch road ADC chip is imported by two passages, and it is AD_L_I and AD_L_Q that branch road is handled on a left side, and right processing branch road is AD_R_I, AD_R_Q, directly gives the I path and the Q channel of ADC chip separately.8 bit data after ADC also shunts analog to digital conversion are exported to the fpga chip that model is XC4VSX55, and left branch road is the V4_L chip, and right branch road is the V4_R chip, by fpga chip data after A is carried out buffer-stored.

V4_L among Fig. 2 and V4_R chip carry out the beginning and the finishing control of data acquisition as acquisition control module, and finish the buffer-stored and the processing of data.Article two, can communicate by 28 pairs of differential data bus between the V4_L of branch road and the V4_R chip, the data of gathering are carried out associated treatment.

V5 chip among Fig. 2 is as the playback controls module, DAC data readback module in two branch roads is controlled, wherein processing branch road in a left side is DAC_L, right processing branch road is DAC_R, and be responsible for two DAC the playback of data of data transfer rate up to 1.2GSPS be provided, about the playback channels of two branch roads be respectively DA_L and DA_R.The V5 chip all has 28 pairs of differential data bus with the XC4VSX55FPGA chip of every branch road, can receive the data of two branch road caching process simultaneously, and be transmitted to corresponding D AC chip and carry out playback output, wherein left branch road is transferred to DAC_L, and right branch road is transferred to DAC_R.

The model of Fig. 2 is that the DSP of TMS320C6455 is the communication control module of digital radio-frequency memory board, and it links to each other with host computer by pci interface, can carry out exchanges data and command communication with main frame.DSP links to each other with the FPGA of integrated circuit board inside by the EMIF interface, can be transferred to integrated circuit board inside to control command, also can return the data of gathering to main frame.

Memory board is right handle branch road acquisition control module V4_R chip carry 4 total volumies reach the DDR2 storer of 512MB, DSP is also plug-in 2 DDR2 storeies that total volume is 256MB, this just provides enough storage spaces for system.

V4_L on the memory board and V4_R chip can be realized data transmission by the self-defined IO of J4, the J5 connector of CPCI, and DSP can be connected with outside by the RapidIO interface of J3 connector, and this just provides enough data paths for the communication between integrated circuit board.

POWER module among Fig. 2 is used for providing operating voltage to each functional module on the memory board.

Claims

1. two-channel digital radio-frequency memory board, it is characterized in that comprising: power module, adc data acquisition module, DAC data readback module, DDR2 memory module, FPGA acquisition control module, FPGA playback controls module, DSP communication control module, analog input interface module, analog signal output interface module, pci interface module, RapidIO interface module, self-defined bus interface module, wherein:

The analog input interface module links to each other with the adc data acquisition module, is responsible for receiving the two-way simulating signal of outside input, and this two paths of signals is exported to the adc data acquisition module;

The adc data acquisition module comprises two adc datas collection submodules, each submodule comprises a slice binary channels 1GSPS ADC chip, is responsible for the simulating signal that the transmission of analog input interface module comes is converted to digital signal at high speed and exports to the FPGA acquisition control module;

The FPGA acquisition control module comprises two FPGA acquisition controlling submodules, be responsible for finishing buffer memory and processing to the data of adc data acquisition module input, the data that buffer memory gets off both can deposit the DDR2 memory module in, also can send into FPGA playback controls module after treatment, be used for the playback of DAC data readback module, can also export to host computer by the DSP communication control module;

DAC data readback module comprises two DAC data readback submodules, each submodule comprises a slice single channel 1.2GSPS DAC chip, and the digital signal that being responsible for receiving FPGA playback controls module provides also is converted to simulating signal at high speed and exports to the analog signal output interface module;

2. a kind of two-channel digital radio-frequency memory board according to claim 1, it is characterized in that: use CPCI 6U standard template, be operated on the industrial control computer platform, the adc data acquisition module uses the AT84AD001BITD chip of Atmel company, and DAC data readback module is used the AD9736BBC chip of Analog company, the DDR2 memory module is used the MT47H64M16 chip of Micron company, the FPGA acquisition control module is used the XC4VSX55 type fpga chip of Xilinx company, FPGA playback controls module is used the XC5VLX30 type fpga chip of Xilinx company, the DSP communication control module uses the TMS320C6455 type DSP of TI company.