论文部分内容阅读
提出了一种基于Mellin变换的快速算法 ,其特点是在给定的某一时刻得到不同尺度下的变换结果 ,算法的运算量与待分析的时延成正比 ,而在固定时刻下的运算量为两个 2M点的FFT和一次 2M点复数乘法(M为待分析的尺度的个数 ) .该算法的优点是实时性好 ,且适合于水声信号领域尺度跨度小、尺度分析较细的特点 ,并给出了与直接法、CZT法的比较结果 .
A fast algorithm based on Mellin transform is proposed, which is characterized by obtaining the transformation results at different scales at a given time, the computation amount of the algorithm is proportional to the delay to be analyzed, and the computation amount under the fixed moment For the two 2M point FFT and a 2M point complex multiplication (M is the number of the scale to be analyzed) .The advantage of the algorithm is good real-time, and is suitable for underwater acoustic signal field of small scale, small scale analysis Characteristics, and gives a comparison with the direct method, CZT method.