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IEEE/ICACT20230246 Slide.05        [Big Slide]       [YouTube]	Oral Presentation
	The OTFS frame signal xDD(k, l) in the DD domain can be converted into a time-frequency (TF) domain signal XTF[n, m] by Inverse Sim Finite Fourier Transform (ISFFT), which can be expressed as (1). Then we use Heisenberg transform for XTF[n, m], the time domain signal s(t) is obtained as (2). Subsequently, s(t) passes through the double-selective fading channel, and the time domain signal r(t) obtained at the receiver can be expressed as (3). So, the above is the basic process operation of OTFS transmitter.

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