M 시퀀스 데시메이션 특성을 이용한 DSSS 신호의 블라인드 동기화

초록

Since despreading must be performed to restore data from Direct Sequence Spread Spectrum(DSSS) signals, it is necessary to find the correct starting position of the spreading code and synchronize the signals. However, in a non-cooperative context, there is no information for synchronization. Therefore, a method that enables synchronization using only the received DSSS signal itself is required. In this paper, we propose an algorithm that synchronizes the scrambled DSSS signal in a non-cooperative context. To synchronize the received signal, we first extract the output of Linear Feedback Shift Register(LFSR), m-sequence, by using a repetitive pattern of the spreading code. Then, we use the decimation property of the extracted m-sequence. Through computer simulations, we analyze the synchronization performance of the proposed algorithm in a noisy environment.

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