Signal recognition system and method

Details Signal recognition system and method Signal recognition system and method

H - Electricity

04

H

H04H 60/35 (2008.01) H04H 60/37 (2008.01) H04H 60/38 (2008.01)

Patent

CA 2041754

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 the formula: Image where: N = the number of sampling points: n = 1 < n < N X = the signal value of the signal at the sampling point: µ = a mean of the signal values: .sigma. 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 assess a memory which stores the signal identifications.

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