基于Rayleigh衰落信道，为保证信息传输的有效性和可靠性，对协作转发方案进行研究，提出了在多进制调制后的互信息转发方案，并将其与放大转发方案、检测转发方案、估计转发方案做误码率性能方面的比较。仿真实验结果表明：多进制相移键控调制后的互信息转发方案的误码率性能始终优于其他三种方案；当信噪比相同时，随着调制阶数的增加，数据率增大，可靠性降低，在需要一定传输速率的情况下，可牺牲一部分可靠性来换取传输的有效性。%In order to ensure the validity and reliability of information transmission,the cooperated forward scheme is ana-lyzed,and a scheme of mutual information forwarding executed after multi-system modulation is proposed based on Rayleigh fading channel,which is compared with amplify forwarding scheme,detect forwarding scheme and estimate forwarding scheme in bit the error rate performance. The simulation results show that the mutual information forwarding scheme based on MPSK modula-tion is always superior to the other schemes. When the signal-to-noise ratio is the same,with the increasing of the modulation or-der,the date rate increased,and the reliability of each scheme is reduced obviously. When the higher transmission rate is need,somereliability can be sacrificed to exchange for the validity of the transmission.
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