TDCS基于权系数的基函数设计方法  

TDCS Base Function Design Method Based on Weight Coefficient

作　　者：郭非[1] 郭建新[1] 郭尧[1] 

机构地区：[1]空军工程大学信息与导航学院,西安710077

出　　处：《科学技术与工程》2015年第25期139-142,共4页Science Technology and Engineering

基　　金：国家自然科学基金(61202490)资助

摘　　要：为了充分利用背景干扰频谱分布信息以提高变换域通信系统(transform domain communication system,TDCS)抗干扰性能,提出了一种TDCS基于权系数的基函数幅度谱设计方法。在背景干扰存在的情况下,通过给采样后每个干扰频点幅值乘以一个权系数生成基函数各个频点的幅度谱值,并对系统传输误码性能进行理论分析,推导出系统最优误码性能时权系数的表达式。仿真结果表明,与传统二元判决系统相比,基于权系数系统具有更好的抗干扰性能,在干信比为29 d B、误码率为10-4时,信噪比增益为1.5 d B;在干信比为35 d B、信噪比为0 d B时,仍可以有效的建立通信。In order to make full use of the distributing information of spectrum of background signal to improve transform domain communication system anti-jamming ability. A method that Basis Function is designed based on weights is proposed. With the coexistence of jamming, the jamming amplitude plus weights generates amplitude spectrum, then theoretically analysis the system transmission bit error rate （ BER）, the analytical expression of weights is derived obtained. Simulation results show that compare to the system with binary judgment, TDCS based on weights has the better anti-jamming performance, when the interference-to-signal is 29 dB and the BER is 10 -4, the signal-to-noise ratio gains 1.5 dB, when the interference-to-signal is 35 dB, and the signal-to-noise ratio is 0 dB, the system based on weights can still establish communication.

关 键 词：变换域通信系统 基函数 权系数 幅度谱 抗干扰 

分 类 号：TN92[电子电信—通信与信息系统]