A Blind Despreading and Demodulation Method for QPSK-DSSS Signal With Unknown Carrier Offset Based on Matrix Subspace Analysis

Direct sequence spread spectrum (DSSS) signals are widely used in various military and civilian communication systems. It adopts the pseudorandom (PN) sequence to modulate baseband signal before transmission, leading to some unique and useful properties such as lower working signal to noise ratio (S...

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Veröffentlicht in:	IEEE access 2019, Vol.7, p.125700-125710
Hauptverfasser:	Qiu, Zhaoyang, Peng, Hua, Li, Tianyun
Format:	Artikel
Sprache:	eng
Schlagworte:	Algorithms Band-pass filters Baseband blind despreading and demodulation Cognitive radio Communications systems Covariance matrix Demodulation Eigenvalues and eigenfunctions Eigenvectors Estimation hermit matrix Jamming Matrix decomposition matrix subspace analysis Military communications Pseudorandom Pseudorandom sequences QPSK-DSSS Signal processing Signal to noise ratio Spread spectrum Spread spectrum communication Spread spectrum transmission Subspaces Waveforms
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