Constellation map optimization for highly spectrally efficient communications

摘要

A method and system for optimizing symbol mapping in partial response based communications that are based on use of pulse-shaping that incorporates a predetermined amount of inter-symbol interference (ISI). Optimizing symbol mapping symbol mapping may comprise configuring optimized constellation mapping for use in mapping and/or de-mapping data communicated using the partial response pulse-shaping. In this regard, the optimized constellation mapping may be based on a reference constellation mapping that is utilized for reference modulation scheme, and the configuring comprises applying adjustments to one or more constellation points in the reference constellation mapping. The optimized constellation mapping may be configured to optimize an applicable minimum distance for one or more selected error patterns for a given spectral compression applied during partial response based communications. The configuring of the optimized constellation mapping may be based on feedback information provided during communication of data.

主权项

1. A system comprising:
circuitry of a transmitter, said circuitry being operable to:
receive a bitstream to be transmitted;map, using a symbol constellation, each of a plurality of groups of one or more bits of said bitstream to a corresponding one of a plurality of symbols;transmit said plurality of symbols; andadjust, during said mapping of said plurality of groups of one or more bits of said bitstream, a configuration of said symbol constellation based on one or more error patterns determined to be associated with one or more of said plurality of symbols.