Results 191 to 200 of about 159,611 (219)

Relay Selection with Imperfect CSI in Bidirectional Cooperative Networks

IEEE Communications Letters, 2012
We study the performance of bidirectional multi-relay cooperative networks in the presence of imperfect channel state information by means of the correlation coefficient of the estimated channel gains and their actual values, where the max-min relay selection is used.
M. Jafar Taghiyar, Sami Muhaidat, Jie Liang 0001, Mehrdad Dianati   +3 more
openaire   +1 more source

Robust multiuser MIMO scheduling algorithms with imperfect CSI

Science China Information Sciences, 2011
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Jinchun Gao, Yuanan Liu, Gang Xie
exaly   +2 more sources

Energy-Efficient Power Allocation for NOMA With Imperfect CSI

IEEE Transactions on Vehicular Technology, 2019
An optimum user power allocation solution to maximize the energy efficiency (EE) in a non-orthogonal multiple access (NOMA) system with imperfect channel state information at transmitter (CSIT) and user quality of service constraint is proposed. The EE objective function is a non-convex nonlinear function that leads to a fractional programming problem.
Mohammad Reza Zamani, Mohsen Eslami, Mostafa Khorramizadeh, Zhiguo Ding 0001   +3 more
openaire   +2 more sources

Downlink multicell cooperative transmission with imperfect CSI sharing

2011 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2011
This paper studies downlink multicell cooperative transmission with imperfect CSI sharing led by backhaul latency, assuming full data sharing amongst coordinated base stations (BSs). Different from the traditional centralized cooperative transmission systems where multicell precoder is designed at a central unit, a so-called BS-processing system is ...
Shengqian Han, Chenyang Yang 0001
openaire   +2 more sources

Precoder Designs for MIMO Broadcast Channels with Imperfect CSI

2008 IEEE International Conference on Wireless and Mobile Computing, Networking and Communications, 2008
In this paper, we propose two robust precoder designs for multiple-input multiple-output (MIMO) broadcast channels with imperfect channel state information (CSI). First,we consider a precoder design for a multiuser multiple-input single-output (MISO) downlink, where a base station (BS) equipped with multiple transmit antennas communicates with user ...
P. Ubaidulla, Ananthanarayanan Chockalingam   +1 more
openaire   +1 more source

Performance Analysis of Multihop Cognitive WPCNs with Imperfect CSI

2019 IEEE Global Communications Conference (GLOBECOM), 2019
This paper studies the performance of multi-hop cognitive wireless powered communication networks (WPCNs), where secondary nodes can harvest energy from multiple dedicated power beacons and access spectrum of primary receivers (PRs) to support data transmission.
Toan-Van Nguyen, Tri-Nhu Do, Vo Nguyen Quoc Bao, Daniel Benevides da Costa, Beongku An   +4 more
openaire   +2 more sources

Wideband slope in interference channels with imperfect CSI at transmitters

2011 IEEE International Symposium on Information Theory Proceedings, 2011
In this paper we investigate the wideband slope of a K-user interference channel. We show that delay-based inteference alignment can achieve a wideband slope of S 0 over S 0 , no interference = 1 over 2 independent of the number of users K, when the delays are known exactly.
Minqi Shen, Anders Høst-Madsen
openaire   +1 more source

A User Pairing Algorithm for the Uplink NOMA With Imperfect CSI

International Journal of Communication Systems
ABSTRACTIn this paper, the problem of user pairing across subcarriers is investigated for the uplink non‐orthogonal multiple‐access (NOMA) systems, in which every subcarrier is assigned to exactly two users. Considering fixed transmit power for all users, we pair users such that sum‐rate is maximized over all subcarriers. While different (near) optimum
Zahra Sameti, Bahman Abolhassani, Shahrokh Farahmand   +2 more
openaire   +2 more sources

Robust Transceiver Design for ISAC with Imperfect CSI

GLOBECOM 2023 - 2023 IEEE Global Communications Conference, 2023
Yuchen Zhang 0007, Wanli Ni, Wanbin Tang, Yonina C. Eldar, Dusit Niyato   +4 more
openaire   +2 more sources

Imperfect CSI Based Multi-Way Satellite Relaying

IEEE Wireless Communications Letters, 2018
The problem of multi-way satellite relaying is discussed in this letter. A new transmission method is proposed to improve the performance of the considered system. Further, it is well known that for detecting the transmitted data in a multi-way relaying system, global channel state information (CSI) is required at each earth station (ES).
openaire   +2 more sources