半带脉冲成形滤波器设计及性能分析  

Design and performance analysis of half-band pulse shaping filter

作　　者：郄志鹏[1] 翟海涛[1] 付永明[1] 朱江[1] 

机构地区：[1]国防科技大学电子科学与工程学院,湖南长沙410073

出　　处：《国防科技大学学报》2015年第4期106-110,共5页Journal of National University of Defense Technology

基　　金：青年科学基金资助项目(61201166);国家自然科学基金资助项目(61101097)

摘　　要：为了减少调制带宽、抑制带外杂散,通信系统中通常在发射端设置脉冲成形滤波器,而为了获得最大信噪比,在接收端通常使用匹配滤波器。以半带滤波器为基础,利用多级级联方法,设计了一种新型的脉冲成形滤波器,通过最小、最大相位分解方法,使得滤波器便于在实际通信系统中的使用。仿真结果表明,设计的成形滤波器与升余弦滚降滤波器相比,通带起伏小,硬件资源耗费少,在低信噪比时对不同调制方式均有额外的功率增益。A pulse shaping fiher at the transmitter was set up to reduce the modulation bandwidth and inhibit the out-of-band spurious, and made use of a matched filter at the receiver to obtain the maximum signal noise ratio. A cascaded multistage half-band shaping filter was designed and the minimum phase and maximum phase decomposition method was used, which facilitated the filter available in the practical communication system. Simulation result indicates that distinguished from the raised cosine finite impulse response filter, the designed filter has many advantages： the pass-band with lower ups and downs, less cost on the hardware resource, and extra power gain at low SNR for different modulation.

关 键 词：脉冲成形 匹配滤波 半带滤波器 最小相位 

分 类 号：TN911.6[电子电信—通信与信息系统]