摘要
多调频斜率chirp信号在双正交Fourier变换(biorthogonal Fourier transform,BFT)域内具有良好的正交性,以此特性能够显著提高chirp调制效率。文中分析了多进制chirp-rate信号的BFT检测性能,并证明BFT正交性在实际的宽带多径信道下会遭到破坏,导致检测输出同时存在码间串扰和码内互扰,通过对多径下的BFT输出信号建模,提出一种抗干扰检测算法。仿真和分析表明,BFT在检测多进制chirp-rate调制信号时具有出众的检测性能,以及在多径环境下改进算法能够有效克服其缺陷,改善了误码率性能。
The multiple-chirp-rate signal has a good orthogonal feature in biorthogonal Fourier transform （BFT） domain to improve the chirpmodulation efficiency.This paper analyzes the BFT performances of the multiple-chirp-rate signal detection,and proves that the BFT orthogonality can be damaged in the practical broadband multipath channels,which arises ISI and intra-rate interference during the BFT detection procedure.To solve this problem,an anti-interference detection algorithm is proposed by modeling the BFT outputs.Simulation and analysis results show that BFT in multiple-chirp-rate signal detection has the outstanding performance.Furthermore,the proposed algorithm can effectively reduce the interference for BFT in multipath environment.
出处
《南京邮电大学学报（自然科学版）》
北大核心
2014年第3期52-57,共6页
Journal of Nanjing University of Posts and Telecommunications：Natural Science Edition
基金
国家自然科学基金(61362006
61371107)
省部共建教育部重点实验室认知无线电基金(2013ZR08)
中电54所通信网信息传输与分发技术重点实验室基金(KX132600010/ITD-U13003)资助项目
