Motorola Corporation

Gordon W Chiu

Chin Pan Wong

David R Heeschen

Daniel Jose Landron

Vincent Vigna

A voice channel data processorand corresponding methodoperable in a wireless communications unit'sreceiver and transmitter to facilitate data transmission on a voice channel includes an encoderfor encoding data traffic as a transmit voice frame having a predetermined vocoder parameter and inserting the transmit voice frame into a stream of transmit voice frames with voice traffic and further includes a decoderfor parsing a stream of received voice frames to obtain a vocoder parameter for each, comparing the vocoder parameter for each received frame to the predetermined vocoder parameter, routing the received voice frame for processing as data traffic when the comparison is favorable, and otherwise routing the received voice frame for processing as voice traffic.

Method and apparatus for transferring data over a voice channel

A receiver for receiving and decoding a carrier signal is described. The carrier signal is modulated with a digital signal. The receiver includes a receiver section (162) for demodulating the received carrier signal. The demodulated signal is then sent through an A/D converter (164) for converting the demodulated signal into a digital format. A digital signal processor (166) receives the digital format and calculates the autocorrelation function of the digital format. The digital signal processor (166) then computes the ratio of the autocorrelation at two different reference points and compares this value to a plurality of values stored in its memory locations. The plurality of stored values representing different signal quality measurements.

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Coral Springs, FL, United States of America

Gordon W Chiu