Half of symbol rate sampling for high density DVD channels

Based on the fact that the effective bandwidth of regenerated RF signals of high density digital versatile disk (DVD) systems is about 1/4 T where T is the symbol period, we propose a DVD receiver that can recover source data with rate 1/T after 1/2 T sampling. This receiver employs an interpolator that increases the data rate to 1/T. It is shown that the proposed receiver can perform like conventional receivers with a sampling rate 1/T at the expense of a minor increase in computation. Since the proposed receiver can recover the data at twice of the A/D convertor rate, it should be very useful for high-speed data recovery.