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A Detection Method of WCDMA Signal Based on the Quadratic Fourth-Order Moment Chip at Lower SNR

Wideband code division multiple access signal is non-periodic signal, which always floods in the background noise, bringing difficulties to the signal's reconnaissance. In order to detecting this signal, the detection method based on the quadratic fourth-order moment chip of WCDMA is proposed, and the amount of calculation is reduced by using fast calculation method about fourth-order moment chip. Experimental results show that the detection performance of the method is better than that of the double frequency method, spectrum-reprocessing method. When the false alarm probability is 1%, the detection probability of presented methods reaches above 90% at SNR -21dB.