Orthogonal Frequency Division Multiplex with Multi-Level Technology in Optical Storage Application
Chang-Po Ma, J.Y. Kuo · Japanese Journal of Applied Physics · 2004
We applied orthogonal frequency division multiplex (OFDM) to the optical storage system. By equalizing the channel and correcting the sampling frequency error in the frequency domain, and by using different modulations according to the bit error rate performance of the different carriers, we were able to increase the recording data density to 2.6 times of that of digital versatile disc (DVD).