摘要
针对低载噪比下突发直扩信号扩频码相位估计问题,通过分析扩频码自相关函数Hilbert变换后特性,基于现有前馈估计方法,采用删余的思想改进得出了一种性能更优的前馈估计算法。仿真表明,与现有的几种前馈估计方法相比,本文算法码相差估计误差低于现有几种算法,可以有效提高低载噪比下码相差估计性能。
Considering the chip synchronization of impulse direct spread spectrum signal(IDSSS) under low C/N0 circumstances,by analyzing the character of chip auto-correlated function,an improved algorithm based on the former feedforward chip synchronization algorithms is proposed that adopting the idea of puncturing.Comparing with the several existing feedforward chip synchronization algorithms,simulation results show the outstanding feature of this improved algorithm.The improvement can upgrade the chip synchronization performance effectively under low C/N0 circumstances.
出处
《山西电子技术》
2012年第3期48-49,87,共3页
Shanxi Electronic Technology
关键词
扩频码同步
前馈估计
HILBERT变换
多项式拟合
删余
chip synchronization
feedforward estimation
Hilbert transformation
polynomial fitting
puncturing