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Combined ECCRLL Trellis and Tree Codes
1 Rate 38 27 distance preserving code
3 Generators for 23 convolutional codes
12 other sections not shown
arctangent bidirectional search binary symmetric channel bit error probability bit shift channel bit channel model code rate code system coding gain coding techniques combined ECC/RLL codes concatenated constraint length demagnetization field digital recording channel dipulse response dominant error events earlier interaction ECC code encoder equation error performance Euclidean distance field elements free distance full VA detector gap length GVA detector Hamming distance IEEE IEEE Trans Information density intersymbol interference ISI loss Lorentzian channel m-sequence Magn magnetic recording channel main dipulse matched filter bound matched filter loss maximum likelihood maximum likelihood sequence Miller code noise enhancement nonlinear effects number of computations old data output parameters polynomial g(x PR channels preceding bit primitive polynomial pseudorandom sequence punctured code punctured convolutional codes rate 1/2 code read head readback waveform RLL codes saturation magnetic shift and add shown in figure sliding block code stack algorithm transition shift trellis codes Viterbi algorithm Viterbi decoding