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利用擬合優(yōu)度檢驗的NPLSC-DSSS信號偽碼盲估計

趙知勁,  強(qiáng)芳芳,  李淼,  沈雷,  王海泉

趙知勁, 強(qiáng)芳芳, 李淼, 沈雷, 王海泉. 利用擬合優(yōu)度檢驗的NPLSC-DSSS信號偽碼盲估計[J]. 電子與信息學(xué)報, 2017, 39(3): 749-753. doi: 10.11999/JEIT160541
引用本文: 趙知勁, 強(qiáng)芳芳, 李淼, 沈雷, 王海泉. 利用擬合優(yōu)度檢驗的NPLSC-DSSS信號偽碼盲估計[J]. 電子與信息學(xué)報, 2017, 39(3): 749-753. doi: 10.11999/JEIT160541
ZHAO Zhijin, QIANG Fangfang, LI Miao, SHEN Lei, WANG Haiquan . Blind Estimation of Pseudo-random Noise Codes in NPLSC-DSSS Signals Based on Goodness of Fit Test[J]. Journal of Electronics & Information Technology, 2017, 39(3): 749-753. doi: 10.11999/JEIT160541
Citation: ZHAO Zhijin, QIANG Fangfang, LI Miao, SHEN Lei, WANG Haiquan . Blind Estimation of Pseudo-random Noise Codes in NPLSC-DSSS Signals Based on Goodness of Fit Test[J]. Journal of Electronics & Information Technology, 2017, 39(3): 749-753. doi: 10.11999/JEIT160541

利用擬合優(yōu)度檢驗的NPLSC-DSSS信號偽碼盲估計

doi: 10.11999/JEIT160541 cstr: 32379.14.JEIT160541
基金項目: 

國家自然科學(xué)基金(61571172)

Blind Estimation of Pseudo-random Noise Codes in NPLSC-DSSS Signals Based on Goodness of Fit Test

Funds: 

The National Natural Science Foundation of China (61571172)

  • 摘要: 針對非周期短碼擴(kuò)頻長碼加擾直擴(kuò)(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(guān)函數(shù)(TCF)共同峰理論和NPLSC-DSSS信號TCF估計量的概率函數(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共同峰檢測的二元假設(shè)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(guān)峰性質(zhì)和共軛系TCF峰值點累加和遞增性質(zhì)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(jié)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(jī)碼。
    Abstract: For blind estimation of Pseudo-random Noise (PN) codes in Non-Periodic Long and Short Codes Direct Sequence Spread Spectrum (NPLSC-DSSS) signals, the Triple Correlation Function (TCF) common peak theory of m-sequence and probability function of NPLSC-DSSS signals TCF estimate are given firstly. Then sequences of TCF peaks are built with their conjugate sets features, binary hypothesis test model and accurate detection algorithm of TCF common peaks using goodness of fit test are proposed. Meanwhile, many false peaks are eliminated to improve the estimation performance using the property of forward and backward TCF peaks and cumulative-sums increasing trend of TCF peaks in conjugate sets. Lastly, the primitive polynomials of long and short pseudo-random codes can be estimated with the matrixs oblique elementary method. Simulations show that the proposed method can effectively estimate the PN codes of NPLSC-DSSS signal at low Signal-to-Noise Ratio (SNR).
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出版歷程
  • 收稿日期:  2016-05-06
  • 修回日期:  2016-10-31
  • 刊出日期:  2017-03-19

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