940 Hits in 7.1 sec

Massive MIMO Performance Evaluation Based on Measured Propagation Data

Xiang Gao, Ove Edfors, Fredrik Rusek, Fredrik Tufvesson
2015 IEEE Transactions on Wireless Communications  
Based on measurement data, we illustrate channel behavior of massive MIMO in three representative propagation conditions, and evaluate the corresponding performance.  ...  With a massive MIMO system, we consider the case where a base station equipped with a large number of antenna elements simultaneously serves multiple single-antenna users in the same time-frequency resource  ...  The authors would like to acknowledge the support from ELLIIT -an Excellence Center at Linköping-Lund in Information Technology, and the Swedish Research Council (VR) as well as the Swedish Foundation for  ... 
doi:10.1109/twc.2015.2414413 fatcat:qghbiemrhfcwhpazr2jg3xyuoi

Compressive sensing based pilot reduction technique for massive MIMO systems

Jun Won Choi, Byonghyo Shim
2015 2015 Information Theory and Applications Workshop (ITA)  
Massive multi-input multi-output (MIMO) technique deploys a number of transmit antennas in base-station (BS) to support large number of users and high data throughput.  ...  Key observation in the proposed approach is that the sparse structure of the channel impulse response (CIR) tends to change slower than the OFDM symbol rate.  ...  In this paper, we introduce a new pilot allocation strategy for large scale MIMO-OFDM systems.  ... 
doi:10.1109/ita.2015.7308974 dblp:conf/ita/ChoiS15 fatcat:cojprwsz4feanboqiiwbnsagk4

Experimental Evaluation of Machine learning based MIMO-OFDM System for Optimal PAPR and BER

Y. K Shobha, H. G Rangaraju
2021 WSEAS transactions on systems and control  
Due to the integration of spatial antenna that is based on multi-stream, the problems which are related to significantly high power takes place in the system of OFDM and provides complex processing strategies  ...  Some of the benefits offered by MIMO-OFDM are enhanced spatial multiplexing, reliability and network throughput, and so on.  ...  For every individual antenna, the PAPR has to be calculated in the case of a MIMO-OFDM system.  ... 
doi:10.37394/23203.2021.16.27 fatcat:2bced6kcujau5gx2tsmpmzw2qm

MU-MIMO in LTE Systems

Jonathan Duplicy, Biljana Badic, Rajarajan Balraj, Rizwan Ghaffar, Péter Horváth, Florian Kaltenberger, Raymond Knopp, István Z. Kovács, Hung T. Nguyen, Deepaknath Tandur, Guillaume Vivier
2011 EURASIP Journal on Wireless Communications and Networking  
Appealing performance offered by low-complexity interference aware (IA) receivers is notably emphasized. Furthermore, system level simulations for LTE Release 8 are provided.  ...  MU-MIMO system concepts and implementation aspects have been studied here.  ...  This algorithm is based on the geometrical alignment of interference at eNB which minimizes the effective interference seen by each UE. System Model.  ... 
doi:10.1155/2011/496763 fatcat:6temtav2xzaq5ox36kdnmuulre

2019 Index IEEE Systems Journal Vol. 13

2019 IEEE Systems Journal  
., +, JSYST Dec. 2019 4072-4080 Intercarrier interference Design Adaptive MIMO Space-Time-Frequency Conjugate Two-Path OFDM Systems.  ...  ., +, JSYST March 2019 76-87 End-to-End Theoretical Evaluation of a Nonlinear MIMO-OFDM System in the Presence of Digital Predistorter.  ... 
doi:10.1109/jsyst.2020.2965224 fatcat:x7hx4luelzforfuzigmwmfyhgm

An NLOS-capable 60 GHz MIMO demonstrator: System concept & performance

Wilhelm Keusgen, Andreas Kortke, Leszek Koschel, Michael Peter, Richard Weiler, Herbert Zirath, Marcus Gavell, Zhongxia He
2011 2011 IEEE 9th International New Circuits and systems conference  
The physical layer concept is based on Code-Spread Orthogonal Frequency Division Multiplexing (CS-OFDM) and Alamouti Space-Time Coding (STC) to make maximum use of both frequency and space diversity.  ...  In this paper we present a 60 GHz 2 × 2 MIMO demonstrator which has been developed to accomplish robust line-of-sight as well as non-line-of-sight indoor transmission.  ...  In [2] an OFDM-based demonstrator is presented. Both systems have been shown to work under LOS conditions, only.  ... 
doi:10.1109/newcas.2011.5981306 fatcat:xscjyzjb2rbo7nirhc6mx3adxe

Various Optimization Techniques Performance Testing for OFDM System Design

Deeksha Dimri, Samreen Eram
2016 International Journal of Computer Applications  
This thesis improves the throughput of a present OFDM system by employing adaptive modulation and OFDM coding.  ...  The latter are chiefly important as wireless communications channels WCC are far more antagonistic as opposed to wire replacements, and the need for flexibility proves especially stimulating for reliable  ...  OFDM BASED SYSTEMS 3.1 MIMO A MIMO system is distinct as a system with various antennas at the receiver and transmitter ends.  ... 
doi:10.5120/ijca2016909704 fatcat:keb2fgih7bdrpigmf3chmsxb34

Design and Implementation of a TDD-Based 128-Antenna Massive MIMO Prototyping System [article]

Xi Yang, Wen-Jun Lu, Ning Wang, Karl Nieman, Shi Jin, Hongbo Zhu, Xiaomin Mu, Ian Wong, Yongming Huang, Xiaohu You
2016 arXiv   pre-print
This paper presents a time-division duplex (TDD)-based 128-antenna massive MIMO prototyping system designed to operate on a 20 MHz bandwidth.  ...  for eight single-antenna users using QPSK modulation.  ...  their assistance with the system architecture design and implementation.  ... 
arXiv:1608.07362v1 fatcat:xg5d5h5otvbhvmnp756pofsjwi

Joint Design of Communication and Sensing for Beyond 5G and 6G Systems

Thorsten Wild, Volker Braun, Harish Viswanathan
2021 IEEE Access  
For uplink-based active localization, the network nodes can simply be additional multi-antenna receive units for measuring angle of arrivals and time difference of arrivals.  ...  D-MIMO has been identified to be an attractive solution in factory floor communication [39] for boosting reliability by spatial diversity and inter-cell interference mitigation via advanced receive combining  ... 
doi:10.1109/access.2021.3059488 fatcat:mwh3zdrfx5dmxgaeaatwdbkgie

Transmit Diversity v. Spatial Multiplexing in Modern MIMO Systems [article]

Angel Lozano, Nihar Jindal
2009 arXiv   pre-print
In the context of such systems, therefore, there essentially is no decision to be made between transmit antenna diversity and spatial multiplexing in MIMO communication.  ...  It is argued that, in the context of most modern wireless systems and for the operating points of interest, transmission techniques that utilize all available spatial degrees of freedom for multiplexing  ...  D Case Study: A Contemporary MIMO-OFDM System Let us consider the exemplary system described in Table 1 , which is loosely based on the 3GPP LTE design [23] .  ... 
arXiv:0811.3887v2 fatcat:tpgma2sbhngzdg3nqwqdnmm3w4

Blind Source Separation For Full-Duplex Systems: Potential and Challenges

Mohammed E. Fouda, Chung-An Shen, Ahmed Eltawil
2021 IEEE Open Journal of the Communications Society  
The problem becomes compounded in Multi-Input Multi-Output (MIMO) systems, where considerable overhead is dedicated to training.  ...  Full-duplex communications systems that transmit and receive simultaneously suffer self-interference due to the mixing of the transmitted signal and the weaker received signal at the same node.  ...  ICA-based SIC can be used for FD-MIMO systems with a small number of Tx/Rx antennas without changing the communication standard.  ... 
doi:10.1109/ojcoms.2021.3086105 fatcat:nw5y4hiobffsldjmr4reb4j77u

2020 Index IEEE Systems Journal Vol. 14

2020 IEEE Systems Journal  
., +, JSYST Sept. 2020 3844-3854 Millimeter wave antenna arrays Rate-Loss Mitigation for a Millimeter-Wave Beamspace MIMO Lens Antenna Array System Using a Hybrid Beam Selection Scheme.  ...  ., +, JSYST June 2020 1752-1763 Secure Transmit Antenna Selection Protocol for MIMO NOMA Networks Over Nakagami-m Channels.  ...  ., +, 2585 -2588 Energy-Efficient IoT-Fog-Cloud Architectural Paradigm for Real-Time Wildfire Prediction and Forecasting. 2003 -2011 Agent Pseudonymous Authentication-Based Conditional Privacy Preservation  ... 
doi:10.1109/jsyst.2021.3054547 fatcat:zf2aafvnfzbeje32qei5563myu

A Survey on Spatial Modulation in Emerging Wireless Systems: Research Progresses and Applications [article]

Miaowen Wen, Beixiong Zheng, Kyeong Jin Kim, Marco Di Renzo, Theodoros A. Tsiftsis, Kwang-Cheng Chen, Naofal Al-Dhahir
2019 arXiv   pre-print
Specifically, the fundamental principles, variants of system design, and enhancements of SM are described in detail.  ...  The key idea behind SM is to convey additional information typically through the ON/OFF states of transmit antennas and simultaneously save the implementation cost by reducing the number of radio frequency  ...  In [170] , two transmit antenna selection methods based on the maximization of signal-to-leakage-and-noise ratio and secrecy rate are developed for artificial interference-aided SM systems to enhance  ... 
arXiv:1907.02941v1 fatcat:2nrzttb65necffhjmkbf3lfxqq

Joint Sparse Channel Recovery with Quantized Feedback for Multi-User Massive MIMO Systems

Farzana Kulsoom, Anna Vizziello, Hassan Nazeer Chaudhry, Pietro Savazzi
2020 IEEE Access  
To resolve this issue, the research work presents a novel framework for frequency division duplex (FDD) based multi-user massive MIMO system.  ...  However, due to a large number of antennas in massive MIMO systems, the pilot training and feedback overhead become a bottleneck.  ...  MASSIVE MIMO OFDM SYSTEM Consider a single-cell multi-user massive MIMO OFDM transmission over a quasi-static frequency selective fading channel.  ... 
doi:10.1109/access.2020.2965280 fatcat:zlknoleygzef7bxwy7abznf5bi

Design of large polyphase filters in the Quadratic Residue Number System

Gian Carlo Cardarilli, Alberto Nannarelli, Yann Oster, Massimo Petricca, Marco Re
2010 2010 Conference Record of the Forty Fourth Asilomar Conference on Signals, Systems and Computers  
systems is evaluated for the first time based on UWB channel measurements.  ...  For a multi-antenna OFDM system operating in a channel with limited fluctuations, cyclic delay diversity (CDD) was proposed to increase frequency selectivity.  ... 
doi:10.1109/acssc.2010.5757589 fatcat:ccxnu5owr5fyrcjcqukumerueq
« Previous Showing results 1 — 15 out of 940 results