Results 71 to 80 of about 34,306 (214)
Iterative Joint Channel Estimation and Multi-User Detection for Multiple-Antenna Aided OFDM Systems
, 2007 Multiple-Input-Multiple-Output (MIMO) Orthogonal Frequency Division Multiplexing (OFDM) systems have recently attracted substantial research interest. However, compared to Single-Input-Single-Output (SISO) systems, channel estimation in the MIMO scenario
Akhtman, J, Hanzo, L., Jiang, M
core +1 more source
Green communication systems via a wavefront multiplexing technique
Systems Engineering, Volume 28, Issue 1, Page 5-14, January 2025.Abstract A green communication scheme using an orthogonal wavefront (WF) multiplexing (Muxing) scheme spatially combined with orthogonal frequency‐division multiplexing (OFDM) techniques is proposed. It forms a spatial WF OFDM transceiver. The WF Muxing technique serves as the preprocessing and postprocessing method of the WF OFDM transceiver.
Hen‐Geul Yeh, Joe Lee
wiley +1 more source
Fine‐grained multi‐path channel estimation and matched reception by single metasurface antenna
IET Communications, Volume 19, Issue 1, January/December 2025.This paper investigates methods to enhance antenna's channel information extraction capabilities in wireless communications, particularly in challenging multi‐path environments. Focusing on the issues of channel information loss due to multi‐path superposition at the receiver and multi‐path fading during wireless channel propagation, this paper ...
Yinuo Hao, Liang Jin, Shuaifang Xiao
wiley +1 more source
Key Technologies in Fiber-optic Networks and Its Development Trend
Kongzhi Yu Xinxi Jishu, 2019 It discussed the key enabling technologies in modern fiber-optic systems, especially the applications of digital signal processing (DSP) technologies for compensating the detrimental effects in the optical fiber. In particular, we showed how the advanced
OUYANG Xing, CHEN Gaohua
doaj
Pengaruh Frequency Selectivity Pada Orthogonal Frequency Division Multiplexing (OFDM) [PDF]
, 2013 Orthogonal Frequency Division Multiplexing (OFDM) adalah suatu nama khusus dari multicarrier, dimana suatu aliran data berkecepatan tinggi ditransmisikan melalui sejumlah subcarrier berkecepatan rendah.
Ali Mustofa, ST., MT, Fahima Ulfi Tazkia., Ir. Endah Budi P, MT
core
Flexible Multi-Group Single-Carrier Modulation: Optimal Subcarrier Grouping and Rate Maximization
, 2017 Orthogonal frequency division multiplexing (OFDM) and single-carrier frequency domain equalization (SC-FDE) are two commonly adopted modulation schemes for frequency-selective channels. Compared to SC-FDE, OFDM generally achieves higher data rate, but at
Lie, Joni Polili +3 more
core +1 more source
MMSE‐based passive beamforming for reconfigurable intelligent surface aided millimeter wave MIMO
IET Communications, Volume 19, Issue 1, January/December 2025.Passive beamforming at reconfigurable intelligent surface (RIS) in RIS‐aided millimeter wave multiple‐input multiple‐output (mmWave MIMO) is designed together with precoder and combiner through joint optimization problem to minimize the mean square error between the transmit signal and the estimate of signal at the receiver. The optimization problem is
Prabhat Raj Gautam +2 more
wiley +1 more source
A new reduced-complexity detection scheme for zero-padded OFDM transmissions
EURASIP Journal on Wireless Communications and Networking, 2011 Recently, zero-padding orthogonal frequency division multiplexing (ZP-OFDM) has been proposed as an alternative solution to the traditional cyclic prefix (CP)-OFDM, to ensure symbol recovery regardless of channels nulls.
Eghbali Homa, Muhaidat Sami
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A RIS‐Based Single‐Channel Direction‐of‐Arrival Estimation Method for Communication Signals
IET Communications, Volume 19, Issue 1, January/December 2025.This paper proposes a reconfigurable intelligent surface (RIS)‐based single‐channel direction‐of‐arrival (DOA) estimation method for communication signals. Our method, which incorporates RIS, extended time intervals, atomic norm minimization (‐alternating direction method of multipliers, and mutual incoherence property, addresses the two main problems:
Keming Ma +4 more
wiley +1 more source
OFDM–IDMA for Uplink Transmission in Passive Optical Networks
IEEE Photonics Journal, 2012 In this paper, we propose the orthogonal frequency-division multiplexing-interleaved division multiplexing access (OFDM-IDMA) technique for passive optical networks (PONs).
C. Sanchez, B. Ortega, J. Capmany
doaj +1 more source