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Browsing by Author "Dharmawansa, P"

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Distribution of the scaled condition number of single-spiked complex wishart matrices

Dissanayake, P; Dharmawansa, P; Chen, Y [Article-Full-text]

Let X 2 Cn m (m n) be a random matrix with independent columns each distributed as complex multivariate Gaussian with zero mean and single-spiked covariance matrix In + uu , where In is the n n identity matrix, u 2 ...
Eigenvalue-Based Detection of a Signal in Colored Noise: Finite and Asymptotic Analyses

Chamain, LD; Dharmawansa, P; Atapattu, S; Tellambura, C [Article-Full-text]

Signal detection in colored noise with an unknown covariance matrix has a myriad of applications in diverse scientific/engineering fields. The test statistic is the largest generalized eigenvalue (l.g.e.) of the whitened ...
The Eigenvectors of Single-spiked Complex Wishart Matrices: Finite and Asymptotic Analyses

Dharmawansa, P; Dissanayake, P; Chen, Y [Article-Full-text]

Let W 2 Cn n be a single-spiked Wishart matrix in the class W CWn(m; In + vvy) with m n, where In is the n n identity matrix, v 2 Cn 1 is an arbitrary vector with unit Euclidean norm, 0 is a non-random parameter, ...
Exact outage analysis of multiple-user downlink with MIMO matched-filter precoding

Atapattu, S; Dharmawansa, P; Tellambura, C; Evans, J [Article-Full-text]

Here, we address the problem of outage characterization of a single-cell multiple-user multiple-inputmultiple- output (MU-MIMO) network with matched-filter precoding at the base-station (BS). In particular, we derive ...
Multi-user relay selection for full-duplex radio

Atapattu, S; Dharmawansa, P; Di Renzo, M [Article-Full-text]

Abstract—This paper investigates a user-fairness relay selection (RS) problem for decode-and-forward (DF) full-duplex (FD) relay networks where multiple users cooperate with multiple relays in each coherence time. We ...
On the convergence of inexact gradient descent with controlled synchronization steps

Ranaweera, S; Weeraddana, C; Dharmawansa, P; Fischione, C [Article-Full-text]

We develop a gradient-like algorithm to minimize a sum of peer objective functions based on coordination through a peer interconnection network. The coordination admits two stages: the first is to constitute a gradient, ...
Pairwise Error Probability of Space-Time Codes in Frequency Selective Rician Channels

Dharmawansa, P; Rajatheva, N [Article-Full-text]

In this letter, we investigate the performance of space-time codes in frequency selective correlated Rician channels. An exact expression has been derived for the pairwise error probability (PEP) of space-time trellis ...
Performance analysis of a two-tile reconfigurable intelligent surface assisted 2 × 2 MIMO system

Dharmawansa, P; Atapattu, S; Di Renzo, M [Article-Full-text]

We consider a two–tile reconfigurable intelligent surface (RIS) assisted wireless network with a two-antenna transmitter and receiver over Rayleigh fading. We show that the average received signal-to-noise-ratio (SNR) ...
Reconfigurable Intelligent Surface Assisted Two-Way Communications: Performance Analysis and Optimization

Atapattu, S; Fan, R; Dharmawansa, P; Wang, G; Evans, J; Tsiftsis, TA [Article-Full-text]

In this paper, we investigate the two-way communication between two users assisted by a reconfigurable intelligent surface (RIS). The scheme that two users communicate simultaneously over Rayleigh fading channels is ...
Roy's largest root under rank-one perturbations: The complex valued case and applications

Dharmawansa, P; Nadler, B; Shwartz, O [Article-Full-text]

The largest eigenvalue of a single or a double Wishart matrix, both known as Roy’s largest root, plays an important role in a variety of applications. Recently, via a small noise perturbation approach with fixed dimension ...

Browsing by Author "Dharmawansa, P"

Browsing by Author "Dharmawansa, P"

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