We propose a new turbo encoding scheme for high spectral efficiency with performance close to the Gaussian channel capacity. The scheme combines nonuniform signaling on a Gaussian channel, and pragmatic turbo coded modulation for simple and flexible implementation. A table is used to map equiprobable input symbols into nonequiprobable points in the QAM constellation. It is shown that the new scheme provides shaping gains of 0.6 dB and 0.93 dB, at rates 2 and 3 bits/dim respectively compared to the equiprobable pragmatic turbo coded modulation, and reach about 1 dB from the Gaussian channel capacity.
|Number of pages||5|
|Journal||Conference Record - International Conference on Communications|
|State||Published - 2003|
|Event||2003 International Conference on Communications (ICC 2003) - Anchorage, AK, United States|
Duration: 11 May 2003 → 15 May 2003