Results 21 to 30 of about 480,334 (285)
Optimal Power Allocation in Multiuser OFDM Systems [PDF]
GLOBECOM '03. IEEE Global Telecommunications Conference (IEEE Cat. No.03CH37489), 2004 Multiuser orthogonal frequency division multiplexing (MU-OFDM) is a promising technique for achieving high downlink capacities in future cellular systems. A key issue in MU-OFDM is the allocation of the OFDM subcarriers and power among users sharing the channel. Previous allocation algorithms cannot ensure fairness in advance.
null Zukang Shen +2 more
openaire +1 more source
Green Communication via Power-optimized HARQ Protocols [PDF]
, 2013 Recently, efficient use of energy has become an essential research topic for green communication. This paper studies the effect of optimal power controllers on the performance of delay-sensitive communication setups utilizing hybrid automatic repeat ...
Amat, Alexandre Graell i +2 more
core +2 more sources
EURASIP Journal on Wireless Communications and Networking, 2009 The power allocation problem for multiuser wireless networks is considered under the assumption of amplify-and-forward cooperative diversity. Specifically, optimal centralized and distributed power allocation strategies with and without minimum rate ...
Le LongBao +3 more
doaj +2 more sources
IEEE Access, 2020 This paper investigates the optimal training duration and the optimal power allocation for the training and the data transmission that maximize the ergodic sum rate in single-cell uplink massive MIMO with MMSE receivers.
Rusdha Muharar
doaj +1 more source
Limited-Feedback-Based Channel-Aware Power Allocation for Linear Distributed Estimation [PDF]
, 2013 This paper investigates the problem of distributed best linear unbiased estimation (BLUE) of a random parameter at the fusion center (FC) of a wireless sensor network (WSN).
Fanaei, Mohammad +2 more
core +1 more source
Power Allocation Algorithm Minimizing Outage Probability in Cognitive Radio Relay Network [PDF]
Jisuanji gongcheng, 2017 To improve the outage performance of cognitive radio relay network,this paper proposes a power allocation algorithm minimizing outage probability by analyzing the system outage probability and user power allocation conditions.It presents the mathematical
ZHU Chunhua,ZHOU Yuping,CHEN Baoxing,ZHU Quan
doaj +1 more source
Suboptimal greedy power allocation schemes for discrete bit loading [PDF]
, 2013 In this paper we consider low cost discrete bit loading based on greedy power allocation (GPA) under the constraints of total transmit power budget, target BER, and maximum permissible QAM modulation order.
Alhanafy, Waleed Eid Abdelrahman +1 more
core +3 more sources
Green communication via Type-I ARQ: Finite block-length analysis [PDF]
, 2014 This paper studies the effect of optimal power allocation on the performance of communication systems utilizing automatic repeat request (ARQ). Considering Type-I ARQ, the problem is cast as the minimization of the outage probability subject to an ...
Makki, Behrooz +2 more
core +2 more sources
Non-Cooperative Game-Based Power Allocation for Energy-Efficient NOMA Heterogeneous Network
IEEE Access, 2020 This paper focus on the two-tier downlink heterogeneous networks (HetNets) with non-orthogonal multiple access (NOMA). The aim is to jointly optimize user scheduling and power allocation to solve the problem of maximizing the energy efficiency (EE) of ...
Ken Long +3 more
doaj +1 more source
Energy resources optimal allocation in Iran regarding subsidies lifting [PDF]
مدیریت صنعتی, 2015 This research presents a mathematical model for oil and gas optimal allocation to different sectors in Iran using operations research techniques. Sectors are residential and commercial, transportation, industries, agriculture, exports, injection to oil ...
Aliyeh Kazemi +2 more
doaj +1 more source