摘要
讨论并分析了采用数字相关器的MSK扩频系统发射和接收基本原理。在PN码元的捕获系统中使用了一种改进的附加数字相关器。分析及实验结果表明,对于MSK扩频系统,低信噪比情况下能够正确解码,处理信号的形式灵活,免除了—般扩频系统中最难解决的PN码同步,并为位同步的提取带来了极大的方便;与数字相关器相比,能够简化捕获运算,且有效改善干扰。
The paper discusses and analyzes the basic transmitting and receiving principle of MSK spread spectrum system that uses the digital correlator, and introduces an improved additional correlator used in PN code acquisition system. The analysis and experiment results show that the correlator can decode correctly under the low RSN condition, provide flexible signal processing modes and avoid the synchronization of PN code,which is hardly possible to deal with in the general spread spectrum system, and make it easy to pick up the bit synchronization; compared with the digital correlator, the application of additional correlator can simplify the acquisition operation and mitigate interference.
出处
《无线电工程》
2006年第9期46-48,共3页
Radio Engineering
关键词
扩频
MSK
数字相关
附加相关器
spread spectrum
MSK
digital correlator
additional correlator
