摘要
短波宽带系统广泛应用于军事领域,但其峰均功率比较大。针对该系统特点,选用子载波预留法降低峰均功率比。提出一种低复杂度算法,显著减小原算法运算量,并在子载波预留后加入限幅进一步提高峰均功率比降低效果。短波宽带信道下的蒙特卡罗仿真结果表明,该方法可以有效降低短波宽带系统峰均功率比,且对系统其余性能影响较小。
HF broadband system is widely used in the military field,but it has high Peak- to- Average Power Ratio（PAPR） which impedes its application. For the characteristics of broadband HF system,Tone Reservation （TR） technique is used to reduce system＇s high PAPR. But TR has large amount of computation. A low complied method is proposed to reduce the amount of computation. Further more, clipping is added after TR for lower PAPR. On ITS model＇s broadband HF channel, Monte Carlo simulation results show that the novel method can effectively reduce the PAPR of MCCDMA system and can＇t influence the other performance of system.
出处
《现代电子技术》
2008年第23期4-6,共3页
Modern Electronics Technique
基金
船舶工业预研基金资助(06J3.4.1)
关键词
短波宽带通信
多载波码分多址
峰均功率比
子载波预留
限幅
broadband HF communication MC - CDMA
peak - to - average power ratio tone reservation
clipping
