一种抑制NC-OFDM带外干扰的新方法

摘要

In order to reduce the radiation of the NC-OFDM sidelobe,we use the frequency domain partial response coding (PRC) suppression method combined with dynamic deactivation of subcarriers lying adjacently to allocated license users to suppress the radiation.The impact of the spectrum position and spectrum occupancy rate on the proposes method is analyzed.Simulation results show that the joint method can reduce the NC-OFDM out-of-band interference significantly,at the same time the error performance of the cognitive users can be improved.%为了减小非连续OFDM(NC-OFDM)旁瓣泄露带来的带外辐射,采用频域部分响应(PR)的抑制方法并联合动态关闭授权用户附近子载波的方法来抑制带外辐射.研究了授权用户的频谱位置和频谱占用率对所提出方法抑制带外干扰性能的影响.通过仿真表明,该联合抑制方法可以显著减小NC-OFDM的带外干扰,同时改善认知用户的误码性能.