FPGA Design Multi-channel Signal Acquisition And Transmission System

The use of traditional ASIC technology to achieve radar signal processing has thedisadvantages of high cost, low reuse rate and poor versatility. While with the rapiddevelopment of signal processing technology, relying on the hardware platform oflarge-scale programmable logic devices as FPGA, achieving radar signal processingthrough flexible programming has a great advantage.Based on a specific project, the multi-channel pre-processing of array signal,high-speed gigabit transmission among boards and data storage are implemented inFPGA. The whole processing flow of multi-channel acquisition and transmissionsystem is described as follows. First, multi-channel signal acquisition and digital downconversion (DDC) processing are achieved on signal acquisition board. Data istransmitted among boards through optical fiber, and then stored into FLASH array onstorage board. Simultaneously, processings such as the digital beam forming(DBF),pulse compression are achieved on signal processing board. In this paper, firstly, theradar signal pre-processing algorithm is simulated in Matlab according to the systemrequirements. Secondly, the FPGA programming of several boards is completed withthe rational use of FPGA logic resources such as the DSP48E multiplier-adder, thestorage resources and the IP core of Rocket I/O. Finally, the debugging and datatransmission are completed on the multi-channel acquisition and transmission system.In the application, several circuit boards can run stably and the multi-channelacquisition and transmission system achieves the desired function.