电讯技术2017，Vol.57Issue(2)：127-131,5.DOI:10.3969/j.issn.1001-893x.2017.02.001
认知OFDM系统旁瓣抑制新方法
A Novel Sidelobe Suppression Method for Cognitive OFDM Systems
摘要
Abstract
In view of the severe out-of-band radiation( OBR) problem in cognitive orthogonal frequency division multiplexing( OFDM) systems,the model of power spectral density based active interference can―cellation( PSD-AIC) algorithm is analyzed and a technique of dynamic PSD-AIC is proposed. By calculat―ing the OBR of each subcarrier,the minimum is chosen as optimal. The new method considerably improves the suppression of OBR of about 10 dB. The computational cost is compared and analyzed. Meanwhile,the influence of design parameters on OBR is studied. Simulation results and theoretical analysis show that the technique of dynamic PSD-AIC can significantly reduce out-of-band influence. In comparison with tradi―tional AIC,there is no dramatical increase in complexity.关键词
认知OFDM/干扰抑制/带外辐射/对消子载波/功率谱密度/主动干扰消除Key words
cognitive OFDM/interference suppression/out-of-band radiation( OBR)/cancellation subcar―riers/power spectral density/active interference cancellation分类
信息技术与安全科学引用本文复制引用
孙月明,李景春,方箭,郑娜..认知OFDM系统旁瓣抑制新方法[J].电讯技术,2017,57(2):127-131,5.基金项目
国家高技术研究发展计划(863计划)项目(2014AA01A707) （863计划）
