Systems and Methods for Transmitting Data Using Parallel Decode Capacity Optimized Symbol Constellations

Barsoum, Maged F [Inventor]Jones, Christopher R [Inventor]

关键词: CHANNELS (DATA TRANSMISSION);    DECODING;    MODULATORS;    SATELLITE CONSTELLATIONS;    TELECOMMUNICATION;    SIGNAL TRANSMISSION;    TRANSMITTERS;    PATENTS;    BINARY DIGITS;    BITS;    DEMODULATION;    DIGITAL SYSTEMS;    NORMAL DENSITY FUNCTIONS;    QUADRATURE AMPLITUDE MODULATION;   

RP-ID  :  US-Patent-10,149,179, US-Patent-Appl-SN-15/682,475

学科分类：工程和技术（综合）

美国|英语

来源: NASA Technical Reports Server

【 摘 要 】

Transmitters are described that use non-uniformly spaced symbol constellations that have increased capacity compared to conventional constellations. In many embodiments, a transmitter includes a coder configured to receive bits and output encoded bits, a mapper configured to map said encoded bits to symbols in a non-uniform symbol constellation selected from a plurality of symbol constellations, and a modulator configured to generate a signal for transmission via the communication channel using symbols generated by the mapper. In a variety of embodiments, wherein the non-uniform symbol constellation comprises a set of non-uniformly spaced constellation points, and the location points in the non-uniform symbol constellation are chosen to optimize parallel decode capacity of the non-uniform symbol constellation subject to at least one optimization constraint. In many embodiments, the non-uniform symbol constellation is a quadrature amplitude modulation constellation or a phase shift keyed constellation.