针对宽带卫星通信中信道降雨衰落的非线性特性,研究了多进制幅度移相键控MAPSK调制方法,该方法通过对调制信号星座采取非对称的优化设计方法,有效抵抗了降雨衰落的非线性影响,提高了卫星通信的可靠性,并对该方法进行了仿真验证；仿真结果表明:在基于Mie散射理论建立的雨衰信道模型下,当信噪比大于20dB时,16APSK的误码率明显低于16QAM的误码率,因此在受雨衰影响的卫星通信信道中,16 APSK调制方法与16QAM调制方法相比可以有效地抵抗降雨衰落的影响.%Broadband satellite communications for the decline of Channel rainfall nonlinearity of the multi —band amplitude modulated phase shift keying MAPSK method by asymmetric modulation signal constellation design optimization, effective against a decline of non — rainfall linear effect, improve the reliability of satellite communications, and simulation. Simulation results show that: in the theory of scattering of rain attenuation based on channel conditions, when the signal to noise ratio greater than 20dB when, 16APSK 16QAM bit error rate was significantly lower than the error rate, and therefore affected by rain attenuation of satellite communication channel, 16APSK coded modulation with 16QAM modulation can effectively resist the rain compared to the impact of the decline.
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