MSK扩频调制的带限滤波技术分析  

Analysis on Band-limiting Filtering of MSK Spectrum-spread Modulation

作　　者：赵建功[1] 刘香玲[2] 朱行信 王洪琳[1] 朱良彬[1] 

机构地区：[1]中国电子科技集团公司第五十四研究所,河北石家庄050081 [2]石家庄铁道大学电气与电子工程学院,河北石家庄050043

出　　处：《无线电工程》2016年第1期65-68,71,共5页Radio Engineering

基　　金：中国电子科技集团公司技术创新基金(MX141060003)

摘　　要：针对MSK扩频调制信号的带限滤波问题,对升余弦滚降滤波、等波纹奈奎斯特滤波和高斯滤波技术进行研究。采用了理论模型结合仿真验证的方式,对各种带限处理的带外抑制效果、占用资源和处理时延以及系统传输误码率等多方面的性能进行了分析。仿真表明,和升余弦滚降滤波相比,高斯滤波的运算资源很少但误码率性能差,而等波纹奈奎斯特滤波则可以相对较少地运算资源,实现与升余弦滚降滤波相接近的传输性能。因此,工程应用中应在传输性能和实现代价之间权衡取舍,以获得合适的处理效果。In view of band-limiting filtering of MSK spectrum-spread modulation signals,this paper studies such techniques as raised cosine filtering,equi-ripple Nyquist filtering and Gaussian filtering.The method of combining theoretical modeling with simulations is used to analyze such performances as stop-band attenuation,implement cost,processing latency and system bit error rate of these filters.The simulation results show that Gaussian filtering needs less resource occupancy but has poorer BER performance compared to raised cosine filtering,and the equi-ripple Nyquist filtering has a transmission performance close to raised cosine filtering with less resource occupancy.As a result,appropriate filtering operation should be carried out by tradeoff between filtering performance and implement cost in application.

关 键 词：MSK扩频调制 带限滤波 等波纹奈奎斯特滤波器 高斯滤波器 

分 类 号：TN911[电子电信—通信与信息系统]