本文關鍵詞： 擴頻通信 長短碼直擴信號 三階相關理論 擬合優(yōu)度檢驗 偽碼盲估計　出處：《電子與信息學報》2017年03期 　論文類型：期刊論文

【摘要】：針對非周期短碼擴頻長碼加擾直擴(NPLSC-DSSS)信號的偽碼估計問題,該文首先給出了m序列三階相關函數(TCF)共同峰理論和NPLSC-DSSS信號TCF估計量的概率函數。其次,利用TCF峰的共軛系特性構建了TCF峰值序列,提出了TCF共同峰檢測的二元假設模型和利用擬合優(yōu)度檢驗的TCF共同峰精檢測算法。同時,為提高偽碼估計性能,該文利用正反向TCF三階相關峰性質和共軛系TCF峰值點累加和遞增性質排除大量偽峰。最后通過矩陣斜消法實現(xiàn)長短偽碼的盲估計。仿真結果表明,該文方法在低信噪比條件下能夠有效估計NPLSC-DSSS信號的偽隨機碼。
[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).
【作者單位】： 杭州電子科技大學通信工程學院;
【基金】：國家自然科學基金(61571172)~~
【分類號】：TN911.23;TN914.42
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本文編號：1504850