Abstract
In order to meet the requirement of high gain and rapid transmission for direct-sequence spread-spectrum communication, the M-ary bi-orthogonal keying modulation mechanism has emerged. However, its unique control-code bit and spread-spectrum code-bit-processing mechanism lead to the difficult problem of signal reception and decision. The traditional related decision method has the issues of a large decision error and low efficiency. Therefore, considering the non-correlation characteristic between pseudocodes, a decomposition-combination correlation decision mechanism is proposed based on the principle of pseudocode combination equivalent to the background noise. The test results show that the method can accurately estimate the control-code bit and the spread-spectrum code bit, and the estimation accuracy and computation are better than those of the traditional methods.
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