摘要
为了模拟复杂回波信号,设计一种程控阵列信号源;下位机采用数字信号处理芯片TMS320VC5502作为信号源的硬件平台核心,结合DDS技术采用软件编程的方法实现信号源的输出;通过设计通信接口以及定义通行协议,上位机通过操作PXI-6508模块,实现对阵列信号源的程控输出;实验表明,该阵列信号源能同步触发输出96路阵列信号,也能单独输出一路或几路信号,样点率达400kSa/s,输出信号种类有正弦波、方波、三正弦叠加波和调频波等波形。
In order to simulate the complex echo signal, a programmable array signal source is designed. The lower unit adopted digital signal process chip TMS320VC5502 as the core of signal source hardware, combined with the technology of DDS by use of software programming method to achieve the output of a source. Through the design of communication interface as well as the definition of access protocol, the upper PC implemented programmable output of array signal source through manipulating the PXI--6508 module. Experimental results show that, the array signal source can trigger output 96 channel array signals, also can output one or several signals separately. The sample rate reach 400kSa/s and the type of output wave include sine--wave, square--wave, three-- overlap--sine--wave, FM etc.
出处
《计算机测量与控制》
CSCD
北大核心
2012年第6期1723-1724,1728,共3页
Computer Measurement &Control
基金
广西教育厅科研立项项目(201010LX135)
