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In this paper, a multi-level orthogonal sequences design method is proposed based on the solution of optimization problem using genetic algorithm. The orthogonality performance of the orthogonal sequences designed here is good, which can effectively reduce multiple access interference (MAI). Compared with the traditional Gold sequences, this design approach can achieve better system performance in...
A model of phase disturbance of base band direct sequence spread spectrum (DSSS) signal by additive white Gaussian noise (AWGN) is established, then the receiver based on maximum likelihood probability criteria for DSSS signal in phase domain is proposed. The phase domain receiver can despread base band DSSS signal on the condition that only degraded phase information is known. The simulation results...
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