利用拟合优度检验的NPLSC-DSSS信号伪码盲估计

发布时间：2018-02-12 05:08

  本文关键词： 扩频通信 长短码直扩信号 三阶相关理论 拟合优度检验 伪码盲估计　出处：《电子与信息学报》2017年03期 　论文类型：期刊论文

【摘要】：针对非周期短码扩频长码加扰直扩(NPLSC-DSSS)信号的伪码估计问题,该文首先给出了m序列三阶相关函数(TCF)共同峰理论和NPLSC-DSSS信号TCF估计量的概率函数。其次,利用TCF峰的共轭系特性构建了TCF峰值序列,提出了TCF共同峰检测的二元假设模型和利用拟合优度检验的TCF共同峰精检测算法。同时,为提高伪码估计性能,该文利用正反向TCF三阶相关峰性质和共轭系TCF峰值点累加和递增性质排除大量伪峰。最后通过矩阵斜消法实现长短伪码的盲估计。仿真结果表明,该文方法在低信噪比条件下能够有效估计NPLSC-DSSS信号的伪随机码。
[Abstract]:In order to solve the pseudo code estimation problem of aperiodic short code spread spectrum code scrambling direct spread spectrum (NPLSC-DSSS) signals, the common peak theory of m sequence third order correlation function and the probability function of TCF estimator of NPLSC-DSSS signal are given in this paper. The TCF peak sequence is constructed by using the conjugate system characteristic of TCF peak, and the binary hypothesis model of TCF common peak detection and the TCF common peak precision detection algorithm based on goodness of fit test are proposed. At the same time, in order to improve the performance of pseudo code estimation, In this paper, a large number of pseudo-peaks are eliminated by using the properties of positive and inverse TCF third-order correlation peaks and the cumulative and incremental properties of TCF peaks in conjugate systems. Finally, the blind estimation of long and long pseudo-codes is realized by using the matrix skew elimination method. The simulation results show that, In this paper, pseudorandom codes of NPLSC-DSSS signals can be estimated effectively under low signal-to-noise ratio (SNR).
【作者单位】： 杭州电子科技大学通信工程学院;
【基金】：国家自然科学基金(61571172)~~
【分类号】：TN911.23;TN914.42
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本文编号：1504850