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.
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)
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
MSK spectrum-spread modulation
band-limiting filtering
equi-ripple Nyquist filter
Gaussian filter
