To increase the recording density of optical discs, analog recording techniques such as the use of orthogonal frequency division multiplexing (OFDM) method has been investigated. In OFDM method, the recording signal is separated into several sub frequency bands. So the readout channel becomes tolerant of the deterioration by disturbances such as defocus and disc skew in optical disc systems. Faster than Nyquist (FTN) signaling is known as the method to increase the transfer rate of OFDM channels in the area of telecommunication. In this paper, a possibility to achieve higher recording density of optical disc systems by applying the FTN is described. The readout signal of FTN-OFDM method was calculated using the optical disc readout and the signal processing models considering the crosstalk from adjacent tracks and FTN applied to a five-channel 64-QAM OFDM system. The calculation results show that the proposed system has a possibility of 1.5 times recording density of the conventional optical disc with a similar tolerance to disturbances.

为了增加光盘的记录密度，已经研究了诸如使用正交频分复用(OFDM)方法的模拟记录技术。在OFDM方法中，记录信号被分成几个子频带。因此，读出通道变得可以容忍光盘系统中诸如散焦和盘歪斜等干扰造成的劣化。比奈奎斯特 (FTN) 更快的信令被称为在电信领域提高 OFDM 信道传输速率的方法。在本文中，描述了通过应用 FTN 实现光盘系统更高记录密度的可能性。FTN-OFDM 方法的读出信号是使用光盘读出和考虑相邻轨道串扰的信号处理模型和应用于五通道 64-QAM OFDM 系统的 FTN 计算的。计算结果表明，所提出的系统有可能是传统光盘记录密度的 1.5 倍，同时具有相似的干扰容限。