摘要
针对散射远距离通信时传输损耗大的问题,将多进制正交扩频技术应用到散射通信中。阐述了多进制正交扩频的基本原理,给出了一种多进制正交扩频与分集技术相结合的设计及实现方法,重点介绍了扩频、相关解扩、定时同步、分集合并等关键部分的设计方法。使用硬件描述语言Verilog HDL对系统设计进行了实现,并在Modelsim中进行了仿真,验证了该设计的正确性。为多进制正交扩频技术结合分集技术应用到远距离散射通信的工程研制提供了参考。
The M-ary orthogonal spread spectrum technology is investigated for the huge transmission loss in remote troposeatter communication. The fundamental theory of M-ary orthogonal spread spectrum is firstly presented. Furthermore, this paper introduces an overall digital design scheme of M-ary orthogonal spread spectrum system combined with diversity. Finally the design method of such parts as spread spectrum, correlated dispreading spectrum, timing synchronization, combination and diversity is introduced in detail. The system design is implemented by using Verilog HDL and simulated in Modelsim. The simulation results show that the proposed design is correct, and can provide the reference for application of M-ary orthogonal spread spectrum combined with diversity in remote troposcatter communication.
出处
《无线电通信技术》
2015年第2期82-84,共3页
Radio Communications Technology
基金
国家部委基金资助项目
关键词
多进制
正交扩频
远距离散射通信
四重分集
M-ary
orthogonal spread spectrum
remote troposcatter communication
four-folded diversity
