P. Viswanath

Publications
Influence

D. Tse, P. Viswanath
Computer Science
1 May 2005

MIMO IV: multiuser communication A. Detection and estimation in additive Gaussian noise . Expand

9,173
1004
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Opportunistic beamforming using dumb antennas

P. Viswanath, D. Tse, R. Laroia
Computer Science
IEEE Trans. Inf. Theory
1 June 2002

Multiuser diversity is a form of diversity inherent in a wireless network, provided by independent time-varying channels across the different users. Expand

2,830
287
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Diversity-multiplexing tradeoff in multiple-access channels

D. Tse, P. Viswanath, L. Zheng
Computer Science
IEEE Transactions on Information Theory
1 September 2004

In a point-to-point wireless fading channel, multiple transmit and receive antennas can be used to improve the reliability of reception (diversity gain) or increase the rate of communication for a fixed reliability level (multiplexing gain). Expand

Sum capacity of the vector Gaussian broadcast channel and uplink-downlink duality

P. Viswanath, D. Tse
Computer Science
IEEE Trans. Inf. Theory
1 August 2003

We characterize the sum capacity of the vector Gaussian broadcast channel by showing that the existing inner bound of Marton and the existing upper bound of Sato are tight for this channel. Expand

1,221
71
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Optimal sequences, power control, and user capacity of synchronous CDMA systems with linear MMSE multiuser receivers

P. Viswanath, V. Anantharam, D. Tse
Computer Science
IEEE Trans. Inf. Theory
1 September 1999

We characterize the user capacity of a single cell with the optimal linear receiver (MMSE receiver). Expand

Optimal sequences and sum capacity of synchronous CDMA systems

P. Viswanath, V. Anantharam
Mathematics, Computer Science
IEEE Trans. Inf. Theory
1 September 1999

The sum capacity of a multiuser synchronous CDMA system is completely characterized in the general case of asymmetric user power constraints-this solves the open problem posed by Rupf and Massey. Expand

Extremal Mechanisms for Local Differential Privacy

P. Kairouz, Sewoong Oh, P. Viswanath
Computer Science, Mathematics
J. Mach. Learn. Res.
4 July 2014

We introduce a family of extremal privatization mechanisms, which we call staircase mechanisms, and prove that it contains the optimal privatization mechanism that maximizes utility. Expand

Cognitive Radio: An Information-Theoretic Perspective

A. Jovicic, P. Viswanath
Computer Science
ISIT
9 July 2006

Cognitive radios have been proposed as a means to implement efficient reuse of the licensed spectrum. Expand

The Composition Theorem for Differential Privacy

P. Kairouz, Sewoong Oh, P. Viswanath
Mathematics, Computer Science
IEEE Transactions on Information Theory
4 November 2013

We answer the fundamental question of characterizing the level of overall privacy degradation as a function of number of queries and the privacy levels maintained by each privatization mechanism. Expand

Approximately universal codes over slow-fading channels

S. Tavildar, P. Viswanath
Computer Science, Mathematics
IEEE Transactions on Information Theory
5 December 2005

The authors are with the department of Electrical and Computer Engineering, and the Coordinated Science Laboratory at the University of Illinois at Urbana-Champaign. Expand

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