Results 41 to 50 of about 121,275 (163)

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, Li Zhang, Pingzhi Fan   +2 more
wiley   +1 more source

A squeeze‐and‐excitation network for SNR estimation of communication signals

IET Communications, Volume 19, Issue 1, January/December 2025.
This paper presents a novel deep learning approach that uses a power spectrum generated through overlapping segmentation as input to a neural network for SNR estimation. The performance of SNR estimation has been enhanced by integrating an augmented squeeze‐and‐excitation (SE) attention mechanism with a residual block fusion module, employing multiple ...
Deming Hu, Yongjie Zhao, WenJun Xie, Qingxin Xiao, Longqing Li   +4 more
wiley   +1 more source

Set Partition Modulation [PDF]

arXiv, 2019
In this paper, a novel modulation scheme called set partition modulation (SPM) is proposed. In this scheme, set partitioning and ordered subsets in the set partitions are used to form codewords. We define different SPM variants and depict a practical model for using SPM with orthogonal frequency division multiplexing (OFDM).
arxiv  

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, Qinlong Li, Kaizhi Huang, Ming Yi, Liang Jin   +4 more
wiley   +1 more source

On Spectral Coexistence of CP-OFDM and FB-MC Waveforms in 5G Networks

, 2017
Future 5G networks will serve a variety of applications that will coexist on the same spectral band and geographical area, in an uncoordinated and asynchronous manner.
Bader, Faouzi, Bodinier, Quentin, Palicot, Jacques   +2 more
core   +2 more sources

Orthogonal Frequency Division Multiplexing: An Overview [PDF]

arXiv, 2007
Orthogonal Frequency Division Multiplexing (OFDM) is a multi-carrier modulation scheme that provides efficient bandwidth utilization and robustness against time dispersive channels. This paper deals with the basic system model for OFDM based systems and with self-interference, or the corruption of desired signal by itself in OFDM systems.
arxiv  

Detection Strategies for MIMO‐GFDM‐IM System

IET Communications, Volume 19, Issue 1, January/December 2025.
Dedicated to studying the multiple‐input multiple‐output generalized frequency division multiplexing with index modulation wireless communication system, this paper highlights its high spectral and energy efficiency, robustness against multipath channels.
José Luis Calpa Juajinoy, João Cal‐Braz, Raimundo Sampaio‐Neto   +2 more
wiley   +1 more source

Exact BER Analysis of OFDM Systems Communicating over Frequency-Selective Fading Channels Subjected to Carrier Frequency Offset

, 2007
Orthogonal Frequency Division Multiplexing (OFDM) has been employed in numerous wireless standards. However, the performance of OFDM systems is degraded by both the Carrier Frequency Offset (CFO) and the Phase Estimation Error (PER).
Hanzo, L., Liu, X.
core   +1 more source

N-continuous OFDM: System Optimization and Performance Analysis [PDF]

arXiv, 2013
N-continuous orthogonal frequency division multiplexing (NC-OFDM) is a promising technique to achieve significant sidelobe suppression of baseband OFDM signals. However, the high complexity limits its application. Based on conventional NC-OFDM, in this paper, a new technique, called time-domain N-continuous OFDM (TD-NC-OFDM), is proposed to transfer ...
arxiv  

A Novel FBMC/QAM Scheme to Eliminate the Error Floor in Multipath Channels

IET Communications, Volume 19, Issue 1, January/December 2025.
This paper proposes a cyclic prefix–based filter bank multicarrier with quadrature amplitude modulation (CP‐FBMC/QAM) scheme to eliminate the error floor and simplify the receiver in multipath fading channels. Moreover, to avoid the increase of out‐of‐band (OOB) radiation caused by the CP insertion, we propose a prototype filter optimization problem ...
Yufeng Zhang, Xueqin Chen
wiley   +1 more source