Forward error correction (FEC) m-bit symbol modulation

摘要

Forward error correction (FEC) m-bit symbol modulation. Any desired FEC, error correction code (ECC), and/or combination thereof generates coded bits for combination with either uncoded bits, separately generated coded bits, and/or combination thereof to generate a number of symbols that undergo mapping to a constellation whose respective constellation points have a mapping characterized by a maximum minimum intra-Euclidean distance between the respective constellation points thereby generating a sequence of discrete-valued modulation symbols. The sequence of discrete-valued modulation symbols may then undergo modulation of any of a number of different operations (e.g., digital to analog conversion [e.g., digital to analog converter (DAC)], scaling, frequency shifting, filtering, etc.) to generate a continuous time signal for transmission via a communication channel. Such a device operative to perform including such functionality, circuitry, capability, etc., may be implemented to be operative within any desired communication system (e.g., satellite, wireless, wired, fiber-optic, and/or combination thereof, etc.).

主权项

1. An apparatus comprising:
a low density parity check (LDPC) encoder configured to encode at least one information bit, of a plurality of information bits, to generate a plurality of LDPC coded bits; a symbol mapper configured to map a plurality of symbols to a constellation having a mapping of a plurality of constellation points mapped based on a maximum minimum intra-Euclidean distance there between to generate a sequence of discrete-valued modulation symbols; and a modulator configured to process the sequence of discrete-valued modulation symbols to generate a continuous time signal for transmission via a communication channel, wherein: the constellation including a plurality of areas such that each of the plurality of areas including a respective, corresponding subset of the plurality of constellation points; a first of the plurality of symbols including a first at least one uncoded bit, selected from the plurality of information bits, and a first at least one of the plurality of LDPC coded bits cooperatively corresponding to a first of the plurality of constellation points; the first at least one uncoded bit corresponding to a first of the plurality of areas; the first at least one coded bit corresponding to a respective one constellation point within a first corresponding subset of the plurality of constellation points; a second of the plurality of symbols including a second at least one uncoded bit, selected from the plurality of information bits, and a second at least one of the plurality of LDPC coded bits cooperatively corresponding to a second of the plurality of constellation points; the second at least one uncoded bit corresponding to a second of the plurality of areas; and the second at least one coded bit corresponding to a respective one constellation point within a second corresponding subset of the plurality of constellation points.