dB. At Pb = 10-5, the best system in Table 2.14 is the (1023, 959) RS outer code concatenated with the dual-2, rate 1/3 convolutional inner code: this system requires an Eb/N1 less than 9.38 dB (upperbound) for any non- adaptive jammer, versus 10.38 dB for the best convolutional code alone in Table 2.12. In the terminology of Section 4.10, Part 1, or Figure 4.21, Part 1, the inner encoder and decoder, interleaver and deinterleaver, and FH/MFSK channel can be regarded as a super channel. When the inner code is a dual-K Table 2.14 Relative performance of Reed-Solomon (n,k) outer codes concatenated with dual-K, rate 1/v convolutional inner codes for FH/MFSK signals in worst case non-adaptive jamming. PK denotes inner code symbol error rate. EIN dB for Pb = 10-5 Noise Multitone Inner (n, k) (255, 191) 8.38 X 10-3 11.72 11.39 10.61 10.09 (511, 447) 3.76 X 10-3 11.70 10.61 (1023, 959) 1.73 X 10-3 Same as PK 12.06 10.03 11.00 10.05 (15,7) 1.42 X 10-2 9.47 x 10-3 11.52 10.95 12.37 11.63 (63, 31) 3.27 X 10-2 2.18 X 10-2 10.74 10.34 11.53 10.09 (255, 191) 1.67 X 10-2 1.11 X 10-2 10.19 (1023, 959) 3.46 X 10-3 2.31 X 10-3 10.49 (7, 3) 9.51 X 10-3 5.43 X 10-3 11.39 10.41 14.12 12.98 (63, 31) 4.87 X 10-2 2.78 X 10-2 12.42 11.63 (511, 447) 1.12 X 10-2 6.40 X 10-3 10.90 (15, 7) 2.81 X 10-2 1.50 X 10-2 10.11 14.64 13.43 (255, 191) 3.31 X 10-2 1.77 X 10-2 12.49 11.31 (31, 15) 5.88 X 10-2 3.03 X 10-2 16.21 14.78 (1023, 959) 8.64 X 10-3 4.46 X 10-3 14.36 12.61 Coding Countermeasures convolutional code, the input and output symbols for this super channel like in GF(2*). Suppose now that we use an Odenwalder or Trumpis convolu- tional inner code: although the FH/MFSK channel proper operates over GF(2") for the rate 1/v Trumpis codes, the super channel digests and regur- gitates binary data. Consequently, the interleaver between the outer and inner encoders has to scramble data at the binary level. In our earlier nota- tion, each RS code symbol is transmitted over the super channel as Q binary subsymbols. Now the RS character error rat