Providing reliable broadband wireless communications in high mobility environments, such
as high-speed railway systems, remains one of the main challenges faced by the …

A new two-dimensional modulation technique called Orthogonal Time Frequency Space
(OTFS) modulation designed in the delay-Doppler domain is introduced. Through this …

In this paper, online deep learning (DL)-based channel estimation algorithm for doubly
selective fading channels is proposed by employing the deep neural network (DNN). With …

High-rate data communication over a multipath wireless channel often requires that the
channel response be known at the receiver. Training-based methods, which probe the …

Orthogonal frequency-division multiplexing (OFDM) effectively mitigates intersymbol
interference (ISI) caused by the delay spread of wireless channels. Therefore, it has been …

In this paper, we study the performance of multiple-input multiple-output channel estimation
methods using training sequences. We consider the popular linear least squares (LS) and …

In this paper, we deal with channel estimation for orthogonal frequency-division multiplexing
(OFDM) systems. The channels are assumed to be time-varying (TV) and approximated by a …

Pilot-assisted transmission (PAT) multiplexes the known symbols with the information
bearing data. These pilot symbols and the specific multiplexing scheme are known at the …

This paper presents general classes of optimal training signals for the estimation of
frequency-selective channels in MIMO OFDM systems. Basic properties of the discrete …

Techniques are described for space-time block coding for single-carrier block transmissions
over frequency selective multipath fading channels. Techniques are described that achieve …