摘要
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。
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.
出处
《南京邮电大学学报（自然科学版）》
北大核心
2013年第3期80-84,共5页
Journal of Nanjing University of Posts and Telecommunications：Natural Science Edition
基金
国家重点基础研究发展计划(973计划)(2013CB329005)
国家科技重大专项(2012ZX03001008-003
2011ZX03005-004-03)
江苏省973计划(BK2011027)资助项目
关键词
NC-OFDM
认知
频域部分响应
关闭子载波
干扰
NC-OFDM
cognitive
frequency domain partial response coding
deactivation of subcarriers
interference
