130x1g2 - CCSDS

TM SYNCHRONIZATION AND CHANNEL CODING—SUMMARY OF CONCEPT AND RATIONALE10 010 -1CC(7,1/2)WER10 -210 -310 -410 -5CC(7,2/3)CC(7,3/4)CC(7,5/6)CC(7,7/8)10 -6Interleaving depth I=510 -70 1 2 3 4 5E b/N 0(dB)Figure 6-11: Word Error Rate Simulated Performance of the CCSDS ConcatenatedScheme with Outer E=16 Reed-Solomon Code (255,223) and InnerPunctured Convolutional Codes, Using Finite Interleaving with I=5Figures 6-12 and 6-13 show BER and WER curves for the concatenated codes consisting ofthe non-shortened (255, 239) RS code with E = 8 concatenated with any of the recommendedpunctured or non-punctured (7, 1/2) convolutional codes, with interleaving depth I = 5 (whichgives a close approximation to ideal performance on the AWGN channel).Figure 6-12: Bit Error Rate Simulated Performance of the CCSDS ConcatenatedScheme with Outer E=8 Reed-Solomon Code (255,239) and InnerPunctured Convolutional Codes, Using Finite Interleaving with I=5CCSDS 130.1-G-2 Page 6-11 November 2012