A parameter selector of OFDM waveform based on GAMP algorithm

Orthogonal frequency division multiplexing (OFDM) signal has become one of the most promising technologies in satellite communication modulation due to its effective anti-frequency selective fading and high spectrum resource utilization. However, in power limitation of satellite communication, OFDM signal produces nonlinear distortion with clipping because of the high peak-to-average power ratio issue. It was recently shown that generalized approximate message passing (GAMP) algorithm has good effect in dealing with the problem of nonlinear distortion of the clipped OFDM signal, but it will also lead to the reduction of signal spectrum utilization. This puts forward higher requirements for the design of OFDM waveform parameters. In this paper, an improved waveform parameter selector based on GAMP algorithm is proposed, which for design the signal system of OFDM and optimize the parameters of OFDM signal with different clipping ratios requirements. The simulation results show that the spectral utilization of OFDM is significantly improved.