Abstract
The perfomance comparison of the various partial-response-maximum-likelihood(PRML)systems for advanced optical recording is described. The bit-error-rate(BER)performances of PR(1, 1, 1, 1)ML, PR(1, 2, 2, 1)ML, PR(1, 3, 3, 1)ML, PR(3, 4, 4, 3)ML systems for EFMPlus code and rate 8/14 ARL code are obtained by computer simulation. The BER performance of the rate 8/14 ARL code is superior to that of the EFMPlus code. The best PR targets for the EFMPlus code and rate 8/14 ARL code are PR(3, 4, 4, 3)and PR(1, 2, 2, 1), respectively. The rate 8/14 ARL code has a 0.7-dB gain in the required SNR, compared to the EFMPlus code, and is more robust against tilt and defocus than the EFMPlus code.
