基于相位平滑改善信号频谱特性技术研究  

Improvement of Signal Spectrum Properties Based on Phase Smoothing

作　　者：赵彦惠[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

出　　处：《无线电工程》2013年第4期24-27,共4页Radio Engineering

摘　　要：提出了一种基于相位平滑改善信号频谱特性的新方法。为了加快连续相位调制信号的频谱滚降速度,引入了一种多项式函数来控制调制信号的相位变化轨迹。分析了该函数模型建立条件,根据相位平滑边界条件对函数进行了求解,设计了调制方案,仿真了基带信号的归一化功率谱,结果表明:相对于传统模式,该方法所得信号的相位变化轨迹更加平滑,带外能量辐射小。A method to improve signal spectrum properties based on phase smoothing is proposed. In order to speed up the spec- trum roll-off rate of continuous phase modulation signals, a polynomial function is introduced to control trajectory change of the phase modulated signal. Conditions of the function model are analyzed. Solutions of the function are provided according to phase smoothing border conditions. Modulation scheme is designed. Normalized power spectrum of baseband signal is simulated. Results show that this approach,compared with traditional approaches,provides a smoother signal phase trajectory and low outband energy radiation.

关 键 词：连续相位 平滑相位 功率谱 多项式 

分 类 号：TN92[电子电信—通信与信息系统]