摘要
为了提高功率谱的下降速率,通过对输出调制波形的改进,提出一种新的通信调制方法(C-W Quadrature Phase-Shift Keying,C-WQPSK)。方法在不考虑基带脉冲信号的直接载波QPSK基础上,对调制波形进行重新设计,将扩展为相位跳变角及跳变持续时间均可改变。进行数值仿真的结果验证了提出方法的正确性和有效性,能够保持误码率性能基本不变的同时,功率谱的下降速率、已调波的能量、抗干扰能力均有改善和提高,具有较高的理论意义和工程应用价值。
In order to improve the declining rate of power spectrum,by modifying the modulated waveform,a new communication modulation method,called C-WQPSK,was proposed in this paper.This method based on direct carrier QPSK,did not consider baseband pulse signal and redesigned the modulating waveform,moreovrer,its phase jump angle and the duration time of jumpping can all be changed.Results of the numerical tests indicate that,the method is correct and effective.Compared with direct carrier QPSK,the method can keep the BER performance,meanwhile,the power spectrum decline rate,the energy of modulated carrier wave,and the anti-interference ability are improved and enhanced,so it has high theory significance and engineering application value.
出处
《计算机仿真》
CSCD
北大核心
2012年第10期169-172,共4页
Computer Simulation
基金
国家自然科学基金(61164015)
江西省自然科学基金(CA201004007)
