基于平方谱的符号率估计方法研究  

Research on Square Spectrum Based Symbol Rate Estimation

作　　者：沈永健 王鹏 肖军鹏 

机构地区：[1]北京遥测技术研究所,北京100076

出　　处：《遥测遥控》2010年第1期55-60,共6页Journal of Telemetry,Tracking and Command

摘　　要：研究基于信号平方谱的符号率估计方法,从理论上分析BPSK、QPSK和OQPSK信号平方谱中符号率谱线出现的原因和规律,为了提高符号率谱线的可识别性,利用修正的抑制色噪声的非线性滤波方法对平方谱的估计进行滤波,并从运算复杂度、抗噪性能和对信号升余弦滚降因子变化的鲁棒性等方面分析比较文中算法与文献中类似算法的性能,证明文中算法可以在较小的运算复杂度下取得较强的抗噪性能和较好的鲁棒性。This paper studies the symbol rate estimation algorithm based on the square spectrum of signals.Firstly,the characteristics of spectral lines in the square spectrum of BPSK,QPSK and OQPSK signals are analyzed.In order to improve the resolution of spectral lines,a modified anti-noise nonlinear method is adopted to filter the square spectrum.Furthermore,this paper compares this algorithm and other similar algorithms in published documents by Monte Carlo tests.The algorithm complexity,anti-noise ability and robustness show that the algorithm in this paper exhibits better anti-noise performance and robustness with less computation complexity.

关 键 词：符号率估计 平方谱 非线性滤波器 

分 类 号：TN911.6[电子电信—通信与信息系统]