We consider the time–continuous doubly–dispersive channel with additive Gaussian noise and establish a capacity formula for the case where the channel correlation operator is represented by a symbol which is periodic in time and fulfills some further integrability and smoothness conditions. The key to this is result is a new Szegö formula for certain pseudo–differential operators. The formula j...

Although orthogonal frequency division multiplexing (OFDM) has been the dominant technology for broadband communications in the past, a number of researchers have noted the shortcomings of OFDM in timevarying channels. Hence, alternative systems that use filter banks for multicarrier modulation have been proposed. Filter bank multicarrier (FBMC) systems use offset quadrature amplitude modulatio...

We consider the time–continuous doubly–dispersive channel with additive Gaussian noise and establish a capacity formula for the case where the channel correlation operator is represented by a symbol which is periodic in time and fulfills some further integrability and smoothness conditions. The key to this result is a new Szegö formula for certain pseudo–differential operators. The formula just...

We consider the time–continuous doubly–dispersive channel with additive Gaussian noise and establish a capacity formula for the case where the channel operator is represented by a symbol which is periodic in time and fulfills some further integrability, smoothness and oscillation conditions. More precisely, we apply the well–known HolsingerGallager model for translating a time–continuous channe...

In this letter, we present a generic modulation framework for robust wireless communications over doubly dispersive channels. This robustness is achieved by spreading the symbols time and frequency such that they experience same channel gain. Interestingly, show our generalization of recently proposed orthogonal space (OTFS). By exploiting an additional degree freedom enabled framework, propose...

Wireless communication systems, i.e., systems transmitting information via electromagnetic (radio) or acoustic (sound) waves, have become ubiquitous. In many of these systems, the transmitter or the receiver is mobile. Even if both link ends are static, scatterers — i.e., objects that reflect, scatter, or diffract the propagating waves — may move with significant velocities. These situations gi...

In this paper, we propose a novel channel estimation scheme for pulse-shaped multicarrier systems using smoothness regularization ultra-reliable low-latency communication (URLLC). It can be applied to any system with or without linear precoding estimate challenging doubly-dispersive channels. A recently proposed modulation orthogonal is time-frequency and space (OTFS). OTFS, pilot data symbols ...

In mobile communications, the most widely used multicarrier technique, namely OFDM, is known to exhibit performance limitations in high speed scenarios. FBMC an alternative approach and, among techniques, recently introduced FBMC-PAM scheme has emerged as robust CFO. Therefore, it chosen here challenger of OFDM for comparison doubly dispersive channels. After presentation system model, and wire...

Abstract. This paper analyzes the effect of the insufficient synchronization (carrier frequency offset, timing offset) on hexagonal multicarrier transmission (HMT) systems for doubly dispersive channel. Exact SINR and demodulated symbol expressions for HMT systems in the presence of insufficient synchronization transmission conditions over doubly dispersive channel with exponential delay power ...