Abstract:

A recognition method of downlink telemetry (TM) transfer frame of consultative committee for space data systems(CCSDS) is presented. A detection algorithm of (2,1,6) convolutional code based on check polynomial is examined. A node synchronization technique based on patternmatching is proposed for convolutional code. The frame length is used to roughly judge the interleaving depth of ReedSolomon(255,223), then the galoias field Fourier transform is introduced to verify the recognition results. Simulation is given according to different bit error rates and the TM transfer frame can be recognized effectively. 

Key words: consultative committee for space data systems, protocol recognition, channel coding, transfer frame