| 摘要 |
<p>Apparatus and method for recognizing a signal, receives the signal and samples it at a plurality of sampling points to produce a plurality of signal values. A statistical moment of the signal is calculated using the signal values according to formula (I) where N = the number of sampling points; n = 1 < n < N; X = the signal value of the signal at the sampling point; ν = a mean of the signal values; σ = a standard deviation of the signal values; and k = an integer greater than 1. The calculated statistical moment is then compared with a plurality of stored signal identifications and the received signal is recognized as similar to one of the stored signal identifications. Preferably, the calculated statistical moment is used to create a feature vector which is quantized, and a weighted sum of the quantized feature vector is used to access a memory which stores the signal identifications.</p> |
