摘要
导频的重现性导致了OFMD信号自相关函数副峰的出现,这对利用基于OFDM信号的雷达探测十分不利。对规则导频与自相关函数之间的关系进行了系统分析,确定了副峰位置与导频参数之间的关系,论证了循环前缀长度、导频功率变化、信噪比对副峰高度的影响,提出了通过改变导频值以降低副峰的办法,分析结论与所提方法对利用OFDM信号的探测系统设计具有重要参考价值。
Pilot reproducibility has led to the side peaks of the autocorrelation function of OFDM （Orthogonal Frequency Division Multiplexing） signal and it is quite infaust for radar detection based on OFDM signals. The relationship is analyzed between autocorrelation function and OFDM signals with regular pilot systematically and confirmed the relationship between peak position and the pilot parameters. These the process of the length of the cyclic prefix, pilot power and signal to noise ratio are demanstrated how to influence peak height and a new method is proposed to suppress side peaks. The obtained results are of great importance for the design of radar system based on OFDM signals.
作者
梁龙
许博
邵启红
LIANG Long XU Bo SHAO Qi-hong(Science and Technology on Electronic Information Control Laboratory, Chengdu 610036, China Wuhan Zhongyuan Electronics Group Co Ltd, Wuhan 430205 ,China)
出处
《电子信息对抗技术》
2017年第5期21-27,共7页
Electronic Information Warfare Technology
关键词
正交频分复用
导频
自相关函数
功率谱
OFDM
reference pilot
autoeorrelation function
power spectrum
