Simultaneous analog and digital communication

Details Simultaneous analog and digital communication Simultaneous analog and digital communication

H - Electricity

04

L

H04L 27/34 (2006.01) A63F 13/12 (2006.01) H04J 7/00 (2006.01) H04L 27/18 (2006.01) H04M 11/06 (2006.01) H04N 7/08 (2006.01) H04N 7/24 (2006.01) H04N 7/52 (2006.01)

Patent

CA 2124377

27 SIMULTANEOUS ANALOG AND DIGITAL COMMUNICATION Abstract A method and apparatus for concurrent communication of analog information and digital information. In general terms, when the communication channel is viewed as a multi-dimensional space, the digital information signal is divided into symbols, and the symbols are mapped onto the signal space with a preset distance between them. The analog signal, generally limited in magnitude to less than the distance separating the symbols, is converted to component signals and added (i.e., vector addition) to the symbols. The sum signal is then transmitted to the receiver where the symbols are detected and subtracted from the received signal to yield the analog signal components. The transmitted analog signal is recreated from those components. Both half-duplex and full-duplex operation is available in accordance with the disclosure.

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