摘要
遥测速变信号属于非平稳信号,因此采用小波变换的方法对其进行实时压缩,而在对信号进行小波变换时,小波基的选取是至关重要的,它会直接影响到运算速度和处理效果。从小波基的基本性质和小波基的评价标准两个方面加以分析比较,并结合遥测速变信号的特点和压缩要求,选择了几种典型的小波基进行实验比较。实验结果表明最适合于遥测速变信号实时压缩的最佳小波基为bior2.2。
The telemetry rapidly-varied signal belongs to the unstable signal, so the compression method based on wavelet transform to compress the signal is adopted. When wavelet transform is applied to signal compression, the choice of wavelet base is so important, that it affects the transform＇s speed and the quality of the reconstructed signal. The characteristics of wavelet base and the evaluation criteria are analyzed, and several typical wavelet bases are selected to compare by means of the evaluation criteria. Through extensive experiments, the biorthogonal wavelet base bior2.2 is chosen for real-time compression of the telemetry rapidly-varied signal.
出处
《科学技术与工程》
2010年第6期1531-1534,1539,共5页
Science Technology and Engineering
关键词
小波变换
小波基函数
遥测速变信号
实时压缩
wavelet transform wavelet base telemetry rapidly-varied signal real-time compression
