High-performance metadata indexing and search in petascale data storage systems (2009)
A W Leung, M Shao, T Bisson, S Pasupathy, E L Miller
Abstract. Large-scale storage systems used for scientific applications can store petabytes of data and billions of files, making the organization and management of data in these systems a difficult,...
Yao Ma, R. Schober, S. Pasupathy, T. J. Lim
Accepted to IEEE Transactions on Communications. In this paper, we present a unified mathematical framework to analyze the bit error rate (BER) of a general linear coherent multiuser receiver with...
D. K. Asano, S. Pasupathy, R. Kohno
Abstract-- A coding technique for limiter-discriminator based CPM transceivers is proposed for use in Rayleigh, fast fading environments. The proposed technique maintains the same bandwidth to...
EFFICIENT BLOCK AND CONVOLUTIONAL CODING OF GMSK (2007)
Abstract-- In this paper, block and convolutional coding for Gaussian Minimum Shift Keying is investigated. The improvement in performance that can be obtained without an increase in bandwidth is...
Iterative Multiuser Detection with Graphical Modeling (2007)
In this paper, we shall give a graphical interpretation of the multiuser detection problem for interferencelimited channels, using generalized inference techniques on graphs. One impediment to the...
DF–DD for Channels with Phase Noise (2007)
R. Schober, Y. Ma, S. Pasupathy
Abstract — In this paper, we design decision–feedback differential detection (DF–DD) schemes for channels with phase noise. If the DF–DD feedback filter is properly optimized, a performance...
R. Schober, W. H. Gerstacker, S. Pasupathy
Abstract--- In this paper, modulation diversity (MD) for Rayleigh fading intersymbol interference (ISI) channels is proposed. In particular, the achievable performance with MD is analyzed and a...
Isometry during MIMO Joint Channel Estimation and Data Detection in Fading Channels (2007)
S. Lam, K. N. Plataniotis, S. Pasupathy
Abstract — Due to the nature of multiplicative Rayleigh fading, symmetric space time block codes, and joint estimation and detection schemes, isometry (ambiguities in channel estimation and data...
Soft-input soft-output equalizers for turbo receivers: A statistical physics perspective (2007)
IEEE Transactions on Communications Vol.55 Nr.7, 1300 - 1307
Analysis of LDPC codes in channels with memory (2002)
A. W. Eckford, F. R. Kschischang, S. Pasupathy
Abstract | It is well known that LDPC codes exhibit excellent performance in memoryless channels, which has been shown analytically using the density evolution technique. There has been much recent...
An EM approach to carrier phase recovery in AWGN channel (2001)
Nissilä, Mauri, Pasupathy, S., Mämmelä, Aarne
ICC2001, IEEE International Conference on Communications. Helsinki, FI, 11 - 15 June 2001. Vol. 7, 11 - 14
Multiuser Detection in Fading Channels Using the EM Algorithm (1999)
Abstract- Channels shared by multiple users, such as in DS-CDMA, often suer from Multiple-Access Interference (MAI), which may be mitigated through the use of multiuser detection. In previous work,...
Space-Time Factorability of Active Sonar Array Processors, (1998)
Pasupathy,S., Venetsanopoluos,A. N.
An active sonar array processor is concerned with the detection of a signal echo reflected from a target in the presence of reverberation. The paper derives conditions on signal, reverberation and...
Parallel Structures For Joint Channel Estimation And Data Detection Over Fading Channels (1996)
M. Javad Omidi, P.G. Gulak, M. Javad, S. Pasupathy
In this paper new parallel structures are proposed for joint data and channel estimation over frequency selective Rayleigh fading channels. Maximum Likelihood Sequence Estimation (MLSE) is...
Phase smoothing functions for full response CPM (1989)
D. Asano, H. Leib, S. Pasupathy
Abstract- Continuous Phase Modulation (CPM) is examined for low complexity receivers, i.e., those that operate on only one symbol interval. The tradeoff between the bandwidth and bit error rate (BER)...