基于短时比较分布的信号识别方法  

Recognition Approach of Signals Based on Short-Time Comparison Distribution

作　　者：甘泉[1] 廖成[1] 胡来招[2] 

机构地区：[1]西南交通大学电磁所,四川成都610031 [2]中国西南电子设备研究所,四川成都610036

出　　处：《西南交通大学学报》2006年第2期159-162,共4页Journal of Southwest Jiaotong University

摘　　要：为了在时频域内快速而有效地对信号进行识别,在对相关域内短时信号模糊函数进行分析的基础上,针对短时信号提出了短时比较分布(SCD)的概念并给出了其核函数,通过选取少量短时信号并比较它们的SCD,从而实现复杂信号的识别.实验结果表明,由于SCD具有较强的交叉项抑制能力,该识别方法在减少计算量的同时,也具有较好的抗噪声性能.To recognize signals rapidly and effectively in the time-frequency domain, the concept and core function of short-time comparison distribution （SCD） were proposed for short-time signals through analyzing the short-time signal＇s ambiguity function in the time-lag domain. As a result, a new approach of recognizing complex signals can be realized by selecting several short-time sections of a complex signal to be recognized and comparing their SCDs. Experimental results show that because the SCD of a short-time signal has a powerful ability in cross term suppression＇ the approach not only reduces the amount of calculation but also has a better anti-noise performance.

关 键 词：短时信号 时频分布 识别 

分 类 号：TN911.7[电子电信—通信与信息系统]