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An experimental digital multifrequency receiver was designed and implemented to verify the hypothesis that aliasing techniques can be used to improve the performance-cost ratio of these systems. The receiver employs specific spectral analysis and digit decoding algorithms to take advantage of the aliasing fold-over in order to reject voice-simulated digits. An approximate 2:1 reduction in computational requirement is obtained. Rigorous tests were carried out to verify that computational benefits are not obtained at the expense of degraded performance.
Acoustics, Speech, and Signal Processing, IEEE International Conference on ICASSP '85. (Volume:10 )
Date of Conference: Apr 1985