摘要
文章提出了一种基于扩频码和选择性映射联合的方法来降低MC-CDMA系统的峰均比(PAPR)。首先对MC-CDMA系统的峰均比进行了理论推导,然后对选择性映射方法中的相位序列进行改进并选择了合适的扩频码,二者相结合来降低系统的峰均比。最后,在充分考虑系统的硬件资源消耗情况下,合理选取了相位序列的个数。通过性能仿真证明,该方法可以有效的降低系统的峰均比。
In this paper, a joint method based on spreading code and selected mapping is proposed to reduce the peak-to-average power ratio of MC-CDMA system. First, the PAPR of MC-CDMA system is analyzed, then, the phase sequence in the SLM Finally, the number is improved, and the appropriate spreading code is selected to reduce the PAPR of the system. of the phase sequence is selected by fully considering the system hardware resource. Simulation results show that PAPR can effectively be reduced.
出处
《通信技术》
2009年第2期207-209,共3页
Communications Technology
