Results 31 to 40 of about 50,977 (262)
A new multipath mitigation method for GNSS receivers based on antenna array [PDF]
, 2012 the potential of small antenna array for multipath mitigation in GNSS systems is considered in this paper. To discriminate the different incoming signals (Line of sight and multipaths), a new implementation of the well known SAGE algorithm is proposed ...
Carrie, Guillaume +4 more
core +5 more sources
Single-Carrier Delay-Doppler Domain Equalization
CoRR12 pages, 10 figures, submitted to IEEE ...
Yuto Hama, Hideki Ochiai
openaire +2 more sources
Channel Acquisition for Massive MIMO-OFDM with Adjustable Phase Shift Pilots [PDF]
, 2015 We propose adjustable phase shift pilots (APSPs) for channel acquisition in wideband massive multiple-input multiple-output (MIMO) systems employing orthogonal frequency division multiplexing (OFDM) to reduce the pilot overhead.
Gao, Xiqi +3 more
core +2 more sources
IET Radar, Sonar & Navigation, 2023 Currently, single‐frequency Global Navigation Satellite System (GNSS) receivers dominate maritime navigation units due to their simple structure and low cost but usually cannot meet the positioning requirements of Maritime Autonomous Surface Ship (MASS).
Yi Jiang, Han Shao, Heng Gao
doaj +1 more source
Multipath Parameter Estimation from OFDM Signals in Mobile Channels
, 2010 We study multipath parameter estimation from orthogonal frequency division multiplex signals transmitted over doubly dispersive mobile radio channels. We are interested in cases where the transmission is long enough to suffer time selectivity, but short ...
Alexander, Paul +3 more
core +1 more source
FBMC system: an insight into doubly dispersive channel impact [PDF]
, 2016 It has been claimed that filter bank multicarrier (FBMC) systems suffer from negligible performance loss caused by moderate dispersive channels in the absence of guard time protection between symbols.
Tafazolli, Rahim +4 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 +3 more
openaire +3 more sources
The MIMO-OTFS Technique in the Next 6G Communications
Engineering AccessThe 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
Joint Transmit and Receive Filter Optimization for Sub-Nyquist Delay-Doppler Estimation
, 2018 In this article, a framework is presented for the joint optimization of the analog transmit and receive filter with respect to a parameter estimation problem. At the receiver, conventional signal processing systems restrict the two-sided bandwidth of the
Lenz, Andreas +2 more
core +1 more source
SC-FDMA as a Delay-Doppler Domain Modulation Technique
2024 IEEE International Conference on Communications Workshops (ICC Workshops)This paper compares orthogonal time frequency space (OTFS) modulation and single-carrier frequency division multiple access (SC-FDMA). It shows that these are equivalent except for a set of linear phase shifts, applied to the transmit/receive data symbols, which can be absorbed into the channel.
Arman Farhang, Mohsen Bayat
openaire +3 more sources