Results 1 to 10 of about 4,923,004 (280)

A Gaussian Mixture Approach to Blind Equalization of Block-Oriented Wireless Communications

EURASIP Journal on Advances in Signal Processing, 2010
We consider blind equalization for block transmissions over the frequency selective Rayleigh fading channel. In the absence of pilot symbols, the receiver must be able to perform joint equalization and blind channel identification.
Frederic Lehmann
doaj   +2 more sources

Multicarrier Block-Spread CDMA for Broadband Cellular Downlink

EURASIP Journal on Advances in Signal Processing, 2004
Effective suppression of multiuser interference (MUI) and mitigation of frequency-selective fading effects within the complexity constraints of the mobile constitute major challenges for broadband cellular downlink transceiver design.
Leus Geert, De Man Hugo, Moonen Marc, Petré Frederik   +3 more
doaj   +1 more source

Deep-Unfolded Message-Passing Detection for Multi-Carrier SCMA Systems

IEEE Access
This paper proposes a multi-carrier sparse code multiple access (MC-SCMA) framework with deep-unfolded message passing detection (DU-MPA) for frequency-selective fading channels.
Nguyen Huu Trung, Nguyen Thuy Anh
doaj   +1 more source

Channel estimation and interference suppression in frequency-selective fading channels

Electronics Letters, 2002
The issue of interference suppression is considered for wireless time-division multiple-access (TDMA) systems equipped with multiple receive antennas in frequency-selective fading channels. A novel scheme is presented to estimate the multipath channel, coherently demodulate information symbols, and meanwhile suppress radio interference.
Hongbin Li, Ling Li, Yu-Dong Yao
openaire   +1 more source

Multi-User Detection for Group Orthogonal Multi-Carrier Code Division Multiple Access System in Frequency Selective Rayleigh Fading Channel

Journal of Engineering and Sustainable Development, 2008
Code Division Multiple Access (CDMA) suffers from multi-user interference (MUI), and intersymbol interference (ISI) under frequency selective multi-path fading channels. Orthogonal Frequency Division Multiple access (OFDM) is MUI free but achieves lower
Maha George Zia, Harith Akram Nassir
doaj  

Adaptive Space-Time-Spreading-Assisted Wideband CDMA Systems Communicating over Dispersive Nakagami-$m$ Fading Channels

EURASIP Journal on Wireless Communications and Networking, 2005
In this contribution, the performance of wideband code-division multiple-access (W-CDMA) systems using space-time-spreading- (STS-) based transmit diversity is investigated, when frequency-selective Nakagami-m fading channels, multiuser interference ...
Yang Lie-Liang, Hanzo Lajos
doaj   +1 more source

Receiver structures for time-varying frequency-selective fading channels

IEEE Journal on Selected Areas in Communications, 1999
Several receiver structures for linearly modulated signals are proposed for time-varying frequency-selective channels. Their channel estimators explicitly model the time variation of the channel taps via polynomials. These structures are constructed from the following building blocks: (i) sliding or fixed block channel estimators; (ii) maximum ...
Borah, D, Hart, Brian
openaire   +3 more sources

New design method of space-frequency coding and fast detection algorithm

Tongxin xuebao, 2009
To analyze the performance of space-frequency codes,the Chernoff bound was used in the existing literatures,but it was too loose to conclude the diversity order and coding gain simultaneously.Therefore,a new view of the transmission of space-frequency ...
WANG Xin, WEI Ji-bo, LI Ying
doaj   +2 more sources

FSCM constellation mapping fusion for HF fading channels

Digital Communications and Networks
To resolve the problems of unreliable transmission and low communication capacity caused by the time-frequency domain dual-selective fading of High Frequency (HF) channels, a constellation mapping fusion technology for HF Frequency Shift Chirp Modulation
Jie Wang, Guojun Li, Zheming Zhang, Yun Lin   +3 more
doaj   +1 more source

MM-LoRa-Mod: A non-coherent LoRa modulation scheme for underwater acoustic communications

Dianxin kexue
LoRa (long-range) is an emerging low-power wide-area network technology. Facing challenges such as frequency selective fading multipath channels, existing LoRa schemes are subjected to issues like low data rates and high system complexity.
YU Xiao, XU Weikai, SUN Haixin, LIU Qi
doaj