METHOD FOR HIGH SPEED PROCESS OF CCSDS PN

摘要

A method for processing CCSDS(Consultative Committee for Space Data System) PN(Pseudo Noise) at a high speed is provided to process the CCSDS PN(Pseudo Noise) of artificial satellite image data quickly in a CCSDS pseudo-randomizer by arranging a random bit sequence repeated every 255 bits in 1-byte unit, and processing each 16-bit at once based on property repeated in every 255 bits and an Intel streaming SIMD(Single Instruction stream, Multi Data streams) Extensions 2 technique. A pseudo-random noise sequence repeated every 255 bits in 1-byte unit is arranged in 1-byte unit(S100). A CCSDS pseudo-random sequence repeated every 255 bytes when the pseudo-random noise sequence is repeated every 255 bits is processed at 24X higher speed than a case not applying an SSE2(Streaming SIMD Extensions) technique by applying the SSE2 technique capable of processing 16-byte data with one instruction(S120).