Error Performance of Rectangular Pulse-Shaped OTFS With Practical Receivers

In this letter, we investigate error performance of rectangular pulse-shaped orthogonal time frequency space (OTFS) modulation with a practical receiver. Specifically, consider an essential bandpass filter at receiver RF front-end, which has been ignored in existing works. We analyse the effect pulses on OTFS performance, and derive exact forms interference delay-Doppler (DD) domain. demonstrate that transmitted information symbols certain regions DD domain are severely contaminated. As result, there is floor needs to be addressed for such waveform systems.