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Low complexity method for spreading sequence estimation of DSSS signal in non-cooperative communication systems
Authors:Chang Liang  Wang Fuping  Wang Zanji
Institution:Dept. of Electrical Engineering, Tsinghua Univ., Beijing 100084, P. R. China
Abstract:It is a necessary step to estimate the spreading sequence of direct sequence spread spectrum (DSSS) signal for blind despreading and demodulation in non-cooperative communications. Two innovative and effective detection statistics axe proposed to implement the synchronization and spreading sequence estimation procedure. The proposed algorithm also has a low computational complexity with only linear additions and modifications. Theoretical analysis and simulation results show that the algorithm performs quite well in low SNR environment, and is much better than all the existing typical algorithms with a comprehensive consideration both in performance and computational complexity.
Keywords:direct sequence spread spectrum  detection statistic  low complexity  
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