Results 1 to 10 of about 4,135 (158)
IEEE 802.11ax OFDMA Resource Allocation With Frequency-Selective Fading [PDF]
Sensors, 2021 This paper studies the usage of orthogonal frequency division multiple access (OFDMA) for uplink transmissions in IEEE 802.11ax networks. OFDMA enables simultaneous multi-user transmissions in Wi-Fi, but its usage requires efficient resource allocation ...
Evgeny Khorov +2 more
exaly +4 more sources
Model of frequency selective fading
Revista Facultad de Ingeniería Universidad de Antioquia, 2013 In this paper a mathematical analysis of the frequency selective fading produced by multipath propagation is presented, as well as recent techniques to reduce the effects of this phenomenon as: the diversity of antennas, the Rake receiver, the adaptive equalization and OFDM (Orthogonal frequency division multiplexing).
Luis Pedraza +2 more
openaire +3 more sources
Equalization of Linearly Frequency-Selective Fading Channels [PDF]
IEEE Transactions on Communications, 1997 A simple technique for removing intersymbol interference (ISI) introduced by "linearly frequency-selective" fading channels is presented. The technique involves the optimization of the overall impulse response of the transmit and receive filters and effectively reduces the channel to one which is flat fading.
Wing Seng Leon, D P Taylor, U Mengali
exaly +2 more sources
Dianzi Jishu Yingyong, 2021 With the rapidly increasing interests in ocean observation and ocean Internet of Things, low-cost underwater acoustic communication equipment draws more and more attention from the research community.
Li Shuang, Qiu Yifan, Tong Feng
doaj +1 more source
Relay selection in cooperative networks with frequency selective fading [PDF]
EURASIP Journal on Wireless Communications and Networking, 2011 In this article, we consider the diversity-multiplexing tradeoff (DMT) of relay-assisted communication through correlated frequency selective fading channels. Recent results for relays in flat fading channels demonstrate a performance and implementation advantage in using relay selection as opposed to more complicated distributed space-time coding ...
Qingxiong Deng, Andrew G. Klein
openaire +1 more source
Optimal training for frequency-selective fading channels [PDF]
2001 IEEE International Conference on Acoustics, Speech, and Signal Processing. Proceedings (Cat. No.01CH37221), 2002 Many communications systems employ training, ie, the transmission of known signals, so that the channel parameters may be learned at the receiver. This has a dual effect: too little training and the channel is improperly learned, too much training and there is no time left for data transmission before the channel changes.
Haris Vikalo +3 more
openaire +2 more sources
Jordanian Journal of Computers and Information Technology, 2020 In this paper, the least-squares channel estimation (LSCE) is investigated for Massive-Multiple-Input Multiple-Output (Ma-MIMO) OFDM systems based on pilot tones.
Abdelhamid Riadi +2 more
doaj +1 more source
An adaptive receiver for the time- and frequency-selective fading channel [PDF]
IEEE Transactions on Communications, 1997 An adaptive receiver is presented in this paper for the reception of linearly modulated signals transmitted over a time- and frequency-selective fading channel. The channel is modeled as a truncated power series which represents the dispersive fading channel as a sum of three elementary flat-fading channels. The proposed receiver consists of a sequence
Wing Seng Leon, Desmond P. Taylor
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Robust Sampling Frequency Offset Estimation for OFDM over Frequency Selective Fading Channels
Applied Sciences, 2018 Digital radio mondiale (DRM) is a terrestrial radio broadcasting standard to replace existing analogue AM and FM broadcasting, which is based on an orthogonal frequency division multiplexing (OFDM) technique. This paper focuses on the issue of estimating
Yong-An Jung, Young-Hwan You
doaj +1 more source
Massive Access Made Simple: Bloom Filter-Based Coding Under Hard-Decision Envelope Detection
IEEE Open Journal of the Communications Society, 2023 Motivated by the demand of cheap hardware and low computational complexity in massive connectivity, we propose a scheme in which transmitters send data encoded by Bloom filter with On-Off Keying (OOK) modulation and receiver performs hard-decision ...
Rui Deng, Wenyi Zhang
doaj +1 more source