正交正弦基拟合的SNCK谐波线谱去除方法  

SNCK harmonic spectral lines removal scheme based on orthogonal sinusoidal basis fitting

作　　者：周彬[1] 孙志国[1,2] 晏慧强[1] 郭黎利[1] 

机构地区：[1]哈尔滨工程大学信息与通信工程学院,黑龙江哈尔滨150001 [2]北京交通大学轨道交通控制与安全国家重点实验室,北京100044

出　　处：《中南大学学报（自然科学版）》2013年第11期4527-4533,共7页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(61101141);轨道交通控制与安全国家重点实验室开放课题基金项目(RCS2011K009)

摘　　要：针对正弦型非线性切普键控(sine non-linear chirp keying,SNCK)信号频域谐波线谱成分严重影响其边带抑制能力的问题,提出一种采用正交正弦基拟合去除其谐波线谱的波形优化方法。实验结果表明:SNCK信号经过波形优化后,可有效去除其各次谐波线谱,频域能量集中度得到提高,波形样本互相关系数与原始信号相比有所降低,从而增强了其抗干扰能力。Because of the harmonic spectral lines of the sine non-linear chirp keying （SNCK） seriously affect the sideband inhibition ability, a new waveform optimization scheme was proposed by using the orthogonal sinusoidal basis fitting method to remove the harmonic spectral lines. The results show that the optimized SNCK waveform successfully removes harmonic spectral lines by the proposed scheme. The high frequency domain energy concentration can be 3btained, and the cross correlation coefficient of the waveform simples is lower than the original signal, which enhances ：he anti-interference ability.

关 键 词：通信技术 正弦型非线性切普键控 正交正弦基拟合 波形优化 

分 类 号：TN911[电子电信—通信与信息系统]