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ICASSP
2011
IEEE
9 years 3 months ago
Distributed beamforming for OFDM-based cooperative relay networks under total and per-relay power constraints
This paper addresses the problem of beamforming (BF) design for orthogonal frequency division multiplexing (OFDM) based relay networks over frequency-selective channels. Both freq...
Wenjing Cheng, Qinfei Huang, Mounir Ghogho, Dongta...
ICASSP
2011
IEEE
9 years 3 months ago
Joint bandwidth and power allocation in cognitive radio networks under fading channels
A problem of joint optimal bandwidth and power allocation in cognitive networks under fading channels is considered. It is assumed that multiple secondary users (SUs) share the sp...
Xiaowen Gong, Sergiy A. Vorobyov, Chintha Tellambu...
TSP
2010
9 years 6 months ago
MIMO transceiver optimization with linear constraints on transmitted signal covariance components
Abstract--This correspondence revisits the joint transceiver optimization problem for multiple-input multiple-output (MIMO) channels. The linear transceiver as well as the transcei...
Ching-Chih Weng, P. P. Vaidyanathan
TWC
2008
117views more  TWC 2008»
9 years 11 months ago
Achievable Rates and Fairness in Rateless Coded Relaying Schemes
Abstract--The average throughput of three decode-andforward (DF) half-duplex (DFHD) and two DF full-duplex (DFFD) rateless coded relaying schemes are studied under a peak power con...
Reza Nikjah, Norman C. Beaulieu
JSAC
2007
104views more  JSAC 2007»
9 years 11 months ago
Tomlinson-Harashima Precoding for Broadcast Channels with Uncertainty
— We consider the design of Tomlinson-Harashima (TH) precoders for broadcast channels in the presence of channel uncertainty. For systems in which uplink-downlink reciprocity is ...
Michael Botros Shenouda, Timothy N. Davidson
TIT
2008
84views more  TIT 2008»
9 years 11 months ago
Cooperative Multiple-Access Encoding With States Available at One Transmitter
Abstract--We generalize the Gel'fand
Anelia Somekh-Baruch, Shlomo Shamai, Sergio Verd&u...
CORR
2007
Springer
56views Education» more  CORR 2007»
9 years 11 months ago
Duality and Stability Regions of Multi-rate Broadcast and Multiple Access Networks
— We study stability regions of multi-rate Gaussian multiple access (MAC) and broadcast (BC) networks with centralized scheduling algorithms. Techniques are presented to characte...
Viveck R. Cadambe, Syed Ali Jafar
CORR
2006
Springer
107views Education» more  CORR 2006»
9 years 11 months ago
Dense Gaussian Sensor Networks: Minimum Achievable Distortion and the Order Optimality of Separation
We investigate the optimal performance of dense sensor networks by studying the joint source-channel coding problem. The overall goal of the sensor network is to take measurements...
Nan Liu, Sennur Ulukus
EUC
2006
Springer
10 years 3 months ago
Co-optimization of Performance and Power in a Superscalar Processor Design
Abstract. As process technology scales down, power wall starts to hinder improvements in processor performance. Performance optimization has to proceed under a power constraint. Th...
Yongxin Zhu, Weng-Fai Wong, Stefan Andrei
PCRCW
1997
Springer
10 years 3 months ago
Power/Performance Trade-offs for Direct Networks
High performance portable and space-borne systems continue to demand increasing computation speeds while concurrently attempting to satisfy size, weight, and power constraints. As...
Chirag S. Patel, Sek M. Chai, Sudhakar Yalamanchil...
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