摘要
该文通过对影响变换域通信系统(TDCS)抗干扰性能的基函数相关参数的理论分析,提出基于RAT+ FRFT+IFRFT的环境干扰的逐次估计方法,避免强干扰对弱干扰的屏蔽,实现了TDCS环境干扰的准确估计;提出基于环境干扰参数的准确估计,产生与各干扰分量相正交的子基函数,通过子基函数级联产生系统基函数的方法,彻底剔除基函数中的干扰谱。采用该方法生成的基函数使TDCS系统具有良好的抗干扰性能及环境适应性。
In this paper, the relation between anti-interferences performances of Transform Domain Communication System（TDCS） and basis function＇s relational parameters are analyzed theoretically; a method of interferences mitigation one by one based on RAT＋FRFT＋IFRFT is proposed, it can avoid masking affection of strong jammer on weak jammer, and estimate the circumstance jams exactly; a method of system basis function generation based on sub-basis functions concatenation is proposed, these sub-basis functions are generated by the results of every jam estimation exactly and they are orthogonal with every corresponding jam, the circumstance jams＇ spectrums are mitigated completely from system basis function with the method. The advantage anti-interferences performance and adaptability to communication circumstances for TDCS can be produced with the proposed methods.
出处
《电子与信息学报》
EI
CSCD
北大核心
2008年第10期2439-2441,共3页
Journal of Electronics & Information Technology
基金
国家自然科学基金(60496313)
电子科技大学通信抗干扰技术国家重点实验室基金资助课题
关键词
变换域通信系统
非平稳
多干扰
分数傅里叶变换
基函数
TDCS（Transform Domain Communication System）
Non-stationary
Multi-interferences
FRFT
Basis function
