Available Technology

AR4JA LDPC Coded Modulation in C and Matlab

The software supports the modulations of binary phase-shift keying (BPSK), quadrature PSK (QPSK), 8-PSK, 16 amplitude PSK (16-APSK), and 32-APSK. For each modulation type, the software modulator support for various bit-to-modulation-symbol mappings, including the natural order, the Gray code, the anti-Gray code, and the ordering specified by the Digital Video Broadcast Satellite Second Generation standard for 16-APSK and 32-APSK. The software supports hard and soft demodulation, and when soft, it supports both an exact log likelihood computation and an approximate log likelihood computation based on nearest neighbors.
Internal Laboratory Ref #: 
NPO-47171-1
Patent Status: 
U.S. Government Purpose Release
Agency
NASA
Region
Far West
State: 
California
Lab Representatives
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