CAJ | 학술논문

随着信息传递速度的提高,信号处理技术要求提高。从信号频域可以观测信号特点,但是对于自然中的非平稳信号,仅仅频域观测不能反映信号频率在时间轴上的变化,由此提出了时频分析技术,可以产生时间与频率的联合函数,方便观测信号频率在时间轴上的变化。在现有的时频分析技术中较为常见的算法有短时傅里叶变换、WVD、线性调频小波等。本文介绍WVD和线性调频小波两种算法,并通过实验仿真对两种算法进行分析。
수착신식전체속도적제고,신호처리기술요구제고。종신호빈역가이관측신호특점,단시대우자연중적비평은신호,부부빈역관측불능반영신호빈솔재시간축상적변화,유차제출료시빈분석기술,가이산생시간여빈솔적연합함수,방편관측신호빈솔재시간축상적변화。재현유적시빈분석기술중교위상견적산법유단시부리협변환、WVD、선성조빈소파등。본문개소WVD화선성조빈소파량충산법,병통과실험방진대량충산법진행분석。
With the observed from the not reflect signal observation signal Fourier transform, development of information, the signal processing requirements improvement. Characteristics of signal can be frequency domain, but for the natural term of non--stationary signals, Observation in the frequency domain does frequency changes in the time axis, Time-frequency analysis can produce a joint function to facilitate the frequency changes in the time axis. There are Several existing time-frequency analysis, such as short-time WVD, Chirplet and so on. This paper describes Chirplet and WVD,and analyze results of two algorithms .