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TWC
2010
7 years 11 months ago
MIMO Broadcast Channels with Spatial Heterogeneity
We develop a realistic model for multiple-input multiple-output (MIMO) broadcast channels, where each randomly located user's average SNR depends on its distance from the tran...
Illsoo Sohn, Jeffrey G. Andrews, Kwang Bok Lee
JSAC
2011
105views more  JSAC 2011»
7 years 11 months ago
Capacity- and Bayesian-Based Cognitive Sensing with Location Side Information
— We investigate spectrum sensing by energy detection based on two different objective functions: a Bayesian sensing cost or the network weighted sum capacity. The Bayesian cost ...
Peng Jia, Mai Vu, Tho Le-Ngoc, Seung-Chul Hong, Va...
TIT
2002
90views more  TIT 2002»
8 years 3 months ago
Optimal sequences for CDMA under colored noise: A Schur-saddle function property
We consider direct sequence code division multiple access (DS-CDMA), modeling interference from users communicating with neighboring base stations by additive colored noise. We con...
Pramod Viswanath, Venkat Anantharam
TIT
2008
74views more  TIT 2008»
8 years 4 months ago
Sum Capacity of One-Sided Parallel Gaussian Interference Channels
Abstract--The sum capacity of the one-sided parallel Gaussian interference channel is shown to be a concave function of user powers. Exploiting the inherent structure of the proble...
Chi Wan Sung, Kenneth Wing-Kin Lui, Kenneth W. Shu...
TCOM
2008
270views more  TCOM 2008»
8 years 4 months ago
Relay assisted F/TDMA ad hoc networks: node classification, power allocation and relaying strategies
This paper considers the design of relay assisted F/TDMA ad hoc networks with multiple relay nodes each of which assists the transmission of a predefined subset of source nodes to ...
Semih Serbetli, Aylin Yener
CORR
2008
Springer
115views Education» more  CORR 2008»
8 years 4 months ago
Adaptive Sum Power Iterative Waterfilling for MIMO Cognitive Radio Channels
Abstract--In this paper, the sum capacity of the Gaussian Multiple Input Multiple Output (MIMO) Cognitive Radio Channel (MCC) is expressed as a convex problem with finite number of...
Rajiv Soundararajan, Sriram Vishwanath
CORR
2008
Springer
73views Education» more  CORR 2008»
8 years 4 months ago
Sum Capacity of the Gaussian Interference Channel in the Low Interference Regime
New upper bounds on the sum capacity of the two-user Gaussian interference channel are derived. Using these bounds, it is shown that treating interference as noise achieves the sum...
V. Sreekanth Annapureddy, Venugopal V. Veeravalli
GLOBECOM
2006
IEEE
8 years 10 months ago
Sum Rate Maximization and Transmit Power Minimization for Multi-User Orthogonal Space Division Multiplexing
—We demonstrate that receive antenna selection (RAS) provides significant increase in the achievable sum rates for multi-user MIMO wireless downlinks that employ block diagonaliz...
Boon Chin Lim, Christian Schlegel, Witold A. Krzym...
ICC
2008
IEEE
125views Communications» more  ICC 2008»
8 years 10 months ago
Generalization of Channel Inversion Algorithms for Multiuser MIMO Downlink Systems
— Recently a number of transmission schemes have been introduced to achieve sum capacity for multiuser multiinput multi-output (MIMO) broadcast channels (BC). A block diagonaliza...
Hakjea Sung, Sang-Rim Lee, Inkyu Lee
CISS
2008
IEEE
8 years 10 months ago
Improved sum-rate optimization in the multiuser MIMO downlink
—We consider linear precoding and decoding in the downlink of a multiuser multiple-input, multiple-output (MIMO) system. In this scenario, the transmitter and the receivers may e...
Adam J. Tenenbaum, Raviraj S. Adve
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