基于联合降低PAPR和干扰的小波包结构优选

The Research on Structures of Wavelet Packet Modulation Based on PAPR and Interference Reduction

该文从小波包调制系统的结构出发,从联合降低峰均比和干扰的角度,探讨小波包调制系统结构的优选方法,首先从调制端对发送信号峰均比的影响,优选出含出现频率高的节点的树结构,然后从码间干扰和载波间干扰的影响,优选出具有最小干扰的树结构,实现小波包多载波调制系统的优化。仿真结果表明,所选择的小波包树结构降低了调制信号的峰均功率比,同时提高了小波包调制系统的抗干扰性能。

In this paper,the optimal wavelet packet tree（WPT） structure is searched to reduce the joint of peak-to-average power ratio（PAPR） and interference powers（integrated power of ISI and ICI） based on the structure of wavelet packet modulation system.Firstly,better WPT with a high frequency of the node is obtained based on the effect of PAPR at modulation side,then,calculating the sum of ISI and ICI powers（integrated power） by the lower PAPR structures,the optimal wavelet packet tree could be decided.The simulation results show that this optimum wavelet packet tree has lower PAPR and good bit error rate performance.