Bistable stochastic resonance enhancement method for QAM signal

Abstract

The invention relates to the technical field of wireless communication, in particular to a bistable stochastic resonance enhancement method of a QAM (Quadrature Amplitude Modulation) signal, and the specific method for improving the hard decision quality of the QAM signal comprises the following steps: S1, converting QAM into two stable states; s2, parallel multi-path bistable stochastic resonance is carried out; s3, adjusting a synchronization error; s4, demodulating and simulating the 16QAM; s5, using 32QAM to carry out bit error rate comparison on two conditions of adopting a bistable stochastic resonance enhancement method and direct hard decision output; s6, performing bit error rate comparison on the four algorithms; and S7, obtaining an optimal algorithm. In the invention, a parallel multi-path bistable stochastic resonance method is provided, the hard decision quality of the QAM signal can be effectively improved, and especially when the quality of the received signal is relatively poor and constellation points are relatively dense, a relatively low bit error rate can still be ensured.

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