多通道数字接收机采集测试系统设计与实现

Design and Implement of Acquisition AndTest System for Multi-Channel Digital Receiver

为了对某雷达接收机的采样信号进行指标测试,设计并实现了一种光接口数据采集测试系统。该系统硬件部分以FPGA为核心完成光接口对8路中频采样模块16位数据的接收,并配备大容量DDR2对数据进行实时存储,以cPCI芯片CY7C09449PV作为数据采集板与上位机的接口,由计算机应用程序进行控制,将采集到的数据传回计算机中进行时域、频域波形显示,以及ADC动态参数、通道参数的计算。经过测试,系统成功实现同时对8通道数据进行接收并且对其中任意4通道数据进行频谱的绘制以及进行指标计算。

An optical-interface-based data acquisition and testing system is designed to meet the require- ments of a radar experiment platform. FPGA is the core to receive 16-bit data in 8-channel IF sampling module with optical interface, and the system is equipped with large-capacity DDR2 data real-time storage. The cPCI chip CY7C09449PV is the interface of data acquisition board and the host computer, controlled by a computer application pass collected data back to the computer to achieve time domain, frequency domain wavefonn display, the calculation of ADC dynamic parameters and the channel parame- ters. Experimental results demonstrate that the system can receive the 8-channel data simultaneously and can finish spectrum drawing parameter calculation for 4-channel data.