Results 21 to 30 of about 26,636 (252)

General I/O Relations and Low-Complexity Universal MRC Detection for All OTFS Variants

IEEE Access, 2022
Orthogonal time frequency space (OTFS) is a recently proposed modulation scheme which multiplexes information symbols in the delay-Doppler domain to combat severe Doppler shifts in high mobility wireless communications. In this paper, we classify all the
Tharaj Thaj, Emanuele Viterbo, Yi Hong
doaj   +1 more source

Variance state propagation for uplink channel estimation in LEO satellite systems

Electronics Letters, 2023
This paper, considers the channel estimation problem of the uplink low Earth orbit (LEO) satellite orthogonal frequency division multiplexing (OFDM) system.
Xiaoyong Lei, Mingchen Zhang, Yilun Liu, Yong Zhang   +3 more
doaj   +1 more source

Car-to-car radio channel measurements at 5 GHz: Pathloss, power-delay profile, and delay-Doppler spectrum [PDF]

, 2007
We carried out a car-to-infrastructure (C2I) and car-to-car (C2C) 4×4 multiple-input multiple-output (MIMO)radio channel measurement campaign at 5.2GHz in Lund, Sweden.
Karedal, Johan, Molisch, Andreas, Paier, Alexander, Zemen, Thomas, Tufvesson, Fredrik, Dumard, Charlotte, Hofstetter, Helmut, Mecklenbräuker, Christoph, Czink, Nicolai   +8 more
core   +2 more sources

Optimal Zak-OTFS Receiver and Its Relation to the Radar Matched Filter

IEEE Open Journal of the Communications Society
This paper presents optimal receiver implementations for Zak-OTFS modulation. Zak-OTFS has a receiver structure that includes a twisted convolution filter followed by delay-Doppler domain sampling.
Swaroop Gopalam, Hazer Inaltekin, Iain B. Collings, Stephen V. Hanly   +3 more
doaj   +1 more source

Estimation of Overspread Underwater Acoustic Channel Based on Low-Rank Matrix Recovery

Sensors, 2019
In this paper, the estimation of overspread, i.e., doubly spread underwater acoustic (UWA) channels of strong dispersion is considered. We show that although the UWA channel dispersion causes the degeneration of channel sparsity, it leads to a low-rank ...
Jie Li, Fangjiong Chen, Songzuo Liu, Hua Yu, Fei Ji   +4 more
doaj   +1 more source

Single-Carrier Delay-Doppler Domain Equalization

CoRR
12 pages, 10 figures, submitted to IEEE ...
Yuto Hama, Hideki Ochiai
openaire   +2 more sources

Time Domain Passivity Control Based Telepresence with Time Delay.

, 2006
This paper analyses the Time Domain Passivity Control approach in the time-delayed telepresence context, and proposes a method which provides stable operation.
Artigas, Jordi, Jordi Artigas, Jordi Vilanova, Vilanova, Jordi, Gerd Hirzinger, Carsten Preusche, Hirzinger, Gerhard, Preusche, Carsten   +7 more
core   +1 more source

Delay-Doppler Domain Pulse Design for OTFS-NOMA

2024 IEEE International Conference on Communications Workshops (ICC Workshops)
We address the challenge of developing an orthogonal time-frequency space (OTFS)-based non-orthogonal multiple access (NOMA) system where each user is modulated using orthogonal pulses in the delay Doppler domain. Building upon the concept of the sufficient (bi)orthogonality train-pulse [1], we extend this idea by introducing Hermite functions, known ...
Michel Kulhandjian, Hovannes Kulhandjian, Gunes Karabulut Kurt, Halim Yanikomeroglu   +3 more
openaire   +3 more sources

Delay Doppler Transform

, 2023
This letter is to introduce delay Doppler transform (DDT) for a time domain signal. It is motivated by the recent studies in wireless communications over delay Doppler channels that have both time and Doppler spreads, such as, satellite communication ...
Xia, Xiang-Gen
core  

The MIMO-OTFS Technique in the Next 6G Communications

Engineering Access
The orthogonal time-frequency space (OTFS) technique is a promising method of waveform modulation that encodes data in the delay-doppler (DD) domain. OTFS distinguishes itself from conventional multiplexing methods by employing two-dimensional modulation
Ali J. Ramadhan, Ali Taei Zadeh
doaj   +1 more source