数字化接收机中静噪算法分析及DSP实现  

Analyse and using DSP for algorithms of noise squelch in digital receiver

作　　者：郑炜 

机构地区：[1]广州海格通信集团股份有限公司,广州510663

出　　处：《信息技术》2010年第6期87-89,94,共4页Information Technology

摘　　要：数字化接收机通常采用SSB、AM、FM等解调方式。在FM解调方式下,良好的静噪性能通常是衡量接收机性能的重要指标。比较了几种常用的静噪算法,重点提出了一种改进的基于音频频谱特性的静噪算法,并完成了算法的DSP实现和性能分析。通过仿真和实际试验数据分析表明,该算法计算简单,便于DSP实现,可靠性高,适合数字化接收机使用。A digital receiver usually uses mult-ways of demodulation such as SSB,AM,FM etc.In FM demodulation way,a wonderful noise squelch is an important index of receiver＇s performance.In this paper,the ways usually used for noise squelch are analysed and compared firstly,then,an improved noise squelch algorithm by audio spectrum＇s characteristic is presented extrusively,and is implemented in DSP.The simulation and actual experimentation results show that the algorithm which is prone to implementing in DSP and is fit for digital receiver,has high performance,high reliability and low complexity.

关 键 词：数字化接收机 静噪 调频(FM) 数字信号处理器(DSP) 

分 类 号：TN850.8[电子电信—信息与通信工程]