【摘要】 详述了小波理论产生的实际背景和发展状况，对小波变换的定义、时频局部性及处理突变信号的能力作了分析．最后，讨论了小波变换在信号处理中的应用，并展望了其应用前景更多还原

【Abstract】 Practical background and the state of wavelet theory is reviewed. Definition, time-frequency locations and ability to process singularity signal of wavelet transform are analy\ sed and researched. Finally, the application to the signal processing are discussed. and its prospects are looked into.更多还原