论文部分内容阅读
物理层网络编码可以获得更高的频谱利用率,而用户间载波相位偏移易导致星座图扭曲,为了解决载波相位偏移问题,提出了基于预编码的用户间载波相位偏移纠正算法。首先将相位预失真向量引入到用户符号中,然后根据相位预失真向量对物理层网络编码信号进行相位均衡操作,并对置信传播算法进行相应改进,减少用户间载波相位偏移,最后采用仿真实验对算法的有效性进行了分析。实验结果表明,算法可以有效降低用户间载波相位偏移量,减少了无线通信系统的误码率,增强了无线通信系统的性能。
Physical layer network coding can achieve higher spectrum utilization rate, and carrier phase offset between users tends to cause constellation distortion. In order to solve the carrier phase shift problem, a pre-coding based inter-user carrier phase shift correction algorithm is proposed. First, the phase predistortion vector is introduced into the user symbols, and then the phase-predistortion vector is used to phase-encode the physical layer network coding signal. Correspondingly, the confidence propagation algorithm is improved to reduce the carrier phase shift between users. Finally, a simulation experiment The effectiveness of the algorithm is analyzed. The experimental results show that the algorithm can effectively reduce the carrier phase shift between users, reduce the bit error rate of wireless communication system and enhance the performance of wireless communication system.