摘要
针对扩频通信系统的工程应用,介绍了一种通过直接序列扩频实现的方式,系统的硬件架构采用单片机+FPGA实现,在此基础上提出了采用64 bit M序列作为扩频序列与数据运算完成信号的频谱扩展,采用匹配滤波器的方式进行信号的检测。针对降低系统误捕获的概率,提出了门限与捕获间隔相结合的方式。最后通过仿真计算给出了扩频通信系统的性能曲线。
Aiming at the engineering application of spread spectrum communication system,this paper introduces an implementation scheme of direct sequence spread spectrum communication system. The hardware architecture of system is realized by using MCU ＋ FPGA. Based on it,this paper proposes a scheme that the 64-bit M-sequence is used as the spread spectrum sequence to complete signal spectrum spreading by sequence and data computation, and the matched filter is used to perform signal detection. It also proposes a scheme that the threshold and acquisition interval are combined to reduce the probability of false acquisition of system. Finally, the system performance curve is presented by simulation.
出处
《无线电通信技术》
2013年第3期17-19,49,共4页
Radio Communications Technology
关键词
序列
扩频
同步跟踪
解扩
sequence
spread spectrum
synchronous tracking
de-spreading
