Blind Estimation of the PN Sequence in Lower SNR DS/SS Signals

Tianqi ZHANG  Xiaokang LIN  Zhengzhong ZHOU  

IEICE TRANSACTIONS on Communications   Vol.E88-B   No.7   pp.3087-3089
Publication Date: 2005/07/01
Online ISSN: 
DOI: 10.1093/ietcom/e88-b.7.3087
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
DS/SS signal,  PN sequence,  blind estimation,  principal eigenvector,  

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An approach based on signal subspace analysis is proposed to blind estimation of the PN (Pseudo Noise) sequence from lower SNR (Signal to Noise Ratios) DS/SS (Direct Sequence Spread Spectrum) signals. The received signal is divided into vectors according to a temporal window, from which an autocorrelation matrix is computed and accumulated. The PN sequence can be reconstructed from principal eigenvectors of the matrix.