Multi-frequency receiver with arbitrary center frequencies

Details Multi-frequency receiver with arbitrary center frequencies Multi-frequency receiver with arbitrary center frequencies

1993-08-31

1995-12-19

Voeltz, Emanuel T.

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36472408, G01R 2300

Patent

active

054774659

ABSTRACT:
A multi-frequency receiver for detecting the presence of one or more of a plurality of m frequency tones in an incoming signal. A digital signal processor executes a fast algorithm for accurately calculating the spectral energies in a plurality of m frequency bands. Each frequency band is centered on one of the frequencies to be detected. The center frequencies of those bands are independent of the data length used. The calculated spectral energies are compared to a set of predefined thresholds. As a result, the presence of particular tones within the incoming signal are detected.

REFERENCES:
patent: 3932737 (1976-01-01), Delepine
patent: 4025730 (1977-05-01), Sawai
patent: 4066881 (1978-01-01), Houdard
patent: 4080661 (1978-03-01), Niwa
patent: 4211897 (1980-07-01), Ichikawa et al.
patent: 4223185 (1980-09-01), Picou
patent: 4435774 (1984-03-01), Claasen et al.
patent: 4460806 (1984-07-01), Canniff et al.
patent: 4567328 (1986-01-01), Carrasco et al.
patent: 4586174 (1986-04-01), Wong
patent: 4674111 (1987-06-01), Monet et al.
patent: 4833399 (1989-05-01), So
patent: 4839917 (1989-06-01), Oliver
patent: 4990848 (1991-02-01), So
patent: 5010399 (1991-04-01), Goodman et al.
patent: 5083312 (1992-01-01), Newton et al.
patent: 5109417 (1992-04-01), Fielder et al.
patent: 5119322 (1992-06-01), Stroobach
patent: 5163050 (1992-11-01), Cromack
patent: 5177785 (1993-01-01), Itani et al.
patent: 5261007 (1993-11-01), Hirsch
patent: 5272446 (1993-12-01), Chalmers et al.
"An Algorithm for the Evaluation of Finite Trigonometric Series," G. Goertzel, The American Math. Monthly, 1/58.
"Add DTMF Generation and Decoding to DSP-.mu.P Designs," P. Mock Digital Signal Processing Applications with the TMS320 Family vol. 1, Texas Instruments, 1989.
Analog Devices, Digital Signal Processing Applications Using the ADSP-2100 Family, Prentice Hall, 1990.
Documentation for MITEL CM7291 Receiver Test Tape, Copyright 1973, 1980, MITEL Corporation.

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