HYBRID PROJECTION CODING FOR THE CCSDS STANDARD

THIS PROPOSAL IS TO OPTIMIZE THE DESIGN OF AND PERFORM A SOFTWARE IMPLEMENTATION OF A NEW ERROR CORRECTION CODING TECHNIQUE BASED ON AN EXTENSION OF MAJORITY LOGIC CODING. THE CODE HAS AN ALGEBRAIC STRUCTURE THAT PERMITS A HYBRID CODE DESIGN THAT EMPLOYS CYCLIC CODING IN A NATURAL FASHION WITHIN THE BASIC CODE. THE RESULTING HYBRID CODE HAS INCREASED RANDOM ERROR CORRECTION CAPABILITY WHILE RETAININGTHE BURST ERROR CORRECTION CAPABILITY. DECODING IS ACCOMPLISHED BY A SIMPLE ITERATIVE SCHEME, WHEREIN THE NUMBER OF ERRORS IS REDUCED SIGNIFICANTLY WITH EACH ITERATION. THE PROPOSED DECODING ALGORITHM WILL BE CAPABLE OF CORRECTING MANY ERROR PATTERNS OF WEIGHT IN EXCESS OF THEGUARANTEED MINIMUM CORRECTION CAPABILITY, CONTRIBUTING TO THE CODES EXCELLENT PERFORMANCE IN ARQ SYSTEMS. THE RESEARCH WE PROPOSE WILL EXTEND THE BINARY PROJECTION CODE THEORY PIONEERED BY SCS TELECOM, INC. TO A HYBRID CODE HAVING A CODE RATE EXCEEDING 0.9, A BLOCK SIZE OF 10,000 BITS AND WHICH CAN REDUCE AN INPUT BIT ERROR RATE OF 10-(5) TO AN OUTPUT BIT ERROR RATE OF LESS THAN 10-(15). THE CODE WILL BE DESIGNED SO THAT IT CAN BE BUILT TO OPERATE AT 300 MB/S USING COMMERCIALLY AVAILABLE LOGIC CELL ARRAY (LCA) CHIPS.