关于高效调制成形滤波器的中心频率  

Forming filter centre frequency of high-efficiency modulation

作　　者：陈志敏[1] 吴乐南[1] 

机构地区：[1]东南大学信息科学与工程学院,江苏南京210096

出　　处：《电波科学学报》2013年第3期529-534,共6页Chinese Journal of Radio Science

基　　金：国家自然科学基金(61174205)

摘　　要：根据高效调制中扩展的二元相位键控调制(Extended Binary Phase ShiftKeying,EBPSK)信号功率谱的理论表达式,分析了非载频处的功率谱分量,发现其能量最大处的频率偏离载频;在不同带宽范围下对信号发送功率的百分比进行仿真,验证了理论推导的结果;采用中心频率偏移载频的发送成形滤波器进行系统解调性能仿真,得到了中心频率偏调可带来系统增益的结论.理论推导和仿真结果均表明:EBPSK调制信号的能量并非以载频为中心对称分布;发送成形滤波器中心频率向低频偏调增益更高.Based on the theoretical expression of the high-efficiency modulation ex- tended binary phase shift keying（EBPSK） signal, the non-carrier frequency power spectrum component is analyzed, and the max power location was offset the carrier frequency is found. The transmitted power ratio of the modulated EBPSK signal under different band width is , simulated. The offset frequency is ser as the central frequency of the transmit forming filter and the system demodulation performance is simulated to reach a conclusion that the frequency departure could bring system performance gain. The theoretical derivation and simulation results show that the power of the EBPSK signal is not carrier-centered distribution, and the lower fre- quency offset as the centre frequency forming filter could perform better.

关 键 词：EBPSK调制 成形滤波 非中心对称 频率偏调 

分 类 号：TN911.25[电子电信—通信与信息系统]