×

System and method of data communication using turbo trellis coded modulation combined with constellation shaping with or without precoding

  • US 7,065,147 B2
  • Filed: 06/22/2001
  • Issued: 06/20/2006
  • Est. Priority Date: 07/12/2000
  • Status: Active Grant
First Claim
Patent Images

1. A method of binary coded data communication comprising:

  • providing a transmitter having a turbo trellis coded modulator (TTCM) encoder and constellation shaping elements;

    dividing a desired symbol sequence into a first part having K-bits, a second part having N*k-bits, and a third part having the remaining bits;

    processing the first part of the desired symbol sequence via a shell mapper to generate N shells;

    processing the second part of the desired symbol sequence via the TTCM encoder to generate N cosets;

    mapping the third part of the desired symbol sequence, the N shells, and the N cosets to generate N transmit symbols, wherein N, K, and k are integers;

    providing a receiver having a receiver turbo decoder and receiver constellation shaping elements; and

    using the receiver turbo decoder and the receiver constellation shaping elements to process the N transmit symbols to recover the desired symbol sequence wherein the step ofprocessing the N transmit symbols comprises the steps of;

    decoding the N transmit symbols via the turbo receiver decoder to generate N hard symbols,de-mapping the N hard symbols into the first part of the desired symbol sequence via a shell de-mapper,mapping the N hard symbols into the remaining part of the desired symbol sequence via a symbols to bits mapper, andcombining the first part of the desired symbol sequence recovered by the shell de-mapper with the remaining part of the desired symbol sequence recovered by the symbols to bits mapper to recover the desired symbol sequence at the receiver.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×