本文關(guān)鍵詞： 擴(kuò)頻通信 長(zhǎng)短碼直擴(kuò)信號(hào) 三階相關(guān)理論 擬合優(yōu)度檢驗(yàn) 偽碼盲估計(jì)　出處：《電子與信息學(xué)報(bào)》2017年03期 　論文類型：期刊論文

【摘要】：針對(duì)非周期短碼擴(kuò)頻長(zhǎng)碼加擾直擴(kuò)(NPLSC-DSSS)信號(hào)的偽碼估計(jì)問題,該文首先給出了m序列三階相關(guān)函數(shù)(TCF)共同峰理論和NPLSC-DSSS信號(hào)TCF估計(jì)量的概率函數(shù)。其次,利用TCF峰的共軛系特性構(gòu)建了TCF峰值序列,提出了TCF共同峰檢測(cè)的二元假設(shè)模型和利用擬合優(yōu)度檢驗(yàn)的TCF共同峰精檢測(cè)算法。同時(shí),為提高偽碼估計(jì)性能,該文利用正反向TCF三階相關(guān)峰性質(zhì)和共軛系TCF峰值點(diǎn)累加和遞增性質(zhì)排除大量偽峰。最后通過矩陣斜消法實(shí)現(xiàn)長(zhǎng)短偽碼的盲估計(jì)。仿真結(jié)果表明,該文方法在低信噪比條件下能夠有效估計(jì)NPLSC-DSSS信號(hào)的偽隨機(jī)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(xué)通信工程學(xué)院;
【基金】：國(guó)家自然科學(xué)基金(61571172)~~
【分類號(hào)】：TN911.23;TN914.42
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本文編號(hào)：1504850