The fundamental concepts and challenges of orthogonal time frequency space (OTFS) modulation have been reviewed in Part I this three-part tutorial. In second part, we provide an overview the state-of-the-art transceiver designs for OTFS systems, with a particular focus on cyclic prefix (CP) design, window pulse shaping, channel estimation, signal detection. Furthermore, analyze performance modu...

We study implementation issues for spatial convolution lters and their Fourier alternative, with the aim to optimise the accuracy of lter output. We focus on Gaussian scale-space lters and show that there exists a trade-o scale that subdivides the available scale range in the sense that the smaller and larger scales are best extracted by Fourier, respectively spatial ltering.

Recently, orthogonal time frequency space modulation with index (OTFS-IM) has been proposed to improve the bit-error-rate (BER) performance of OTFS system. However, only some grids in OTFS-IM system are activated, resulting low spectral efficiency (SE). In order solve this problem, a new scheme called multiple-mode (MM-OTFS-IM) is paper. scheme, all activated transmit bits. Each grid subblock a...

Event picking is used in many steps of seismic processing. We present an automatic event picking method that is based on a new attribute of seismic signals, the instantaneous traveltime. The calculation of the instantaneous traveltime consists of two separate but interrelated stages. First, a trace is mapped onto the time-frequency domain. Then the time-frequency representation is mapped back o...