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- Nasreldin M. Eltayeb, Sangarapillai Lambotharan, Jonathon A. Chambers
- VTC Spring
- 2007

In this paper we propose a generalization of extended orthogonal space-time block codes (EO-STBCs) for MIMO (multi-input/multi-output) channels using four transmit antennas for quasi-static flat fading channels. Since full rate and complex orthogonal space-time block codes (STBCs) do not exist for more than two transmit antennas, we propose a feedback based… (More)

- Gaojie Chen, Zhao Tian, Yu Gong, Zhi Chen, Jonathon A. Chambers
- IEEE Transactions on Information Forensics and…
- 2014

This paper considers the security of transmission in buffer-aided decode-and-forward cooperative wireless networks. An eavesdropper which can intercept the data transmission from both the source and relay nodes is considered to threaten the security of transmission. Finite size data buffers are assumed to be available at every relay in order to avoid having… (More)

- Wenwu Wang, Saeid Sanei, Jonathon A. Chambers
- IEEE Transactions on Signal Processing
- 2005

A new approach for convolutive blind source separation (BSS) by explicitly exploiting the second-order nonstationarity of signals and operating in the frequency domain is proposed. The algorithm accommodates a penalty function within the cross-power spectrum-based cost function and thereby converts the separation problem into a joint diagonalization problem… (More)

- Amod J. G. Anandkumar, Amod J. G. Anandkumar, Sangarapillai Lambotharan, Jonathon A. Chambers
- 2010 IEEE International Conference on Acoustics…
- 2010

The problem of decentralized power allocation for competitive rate maximization in a frequency-selective Gaussian interference channel is considered. In the absence of perfect knowledge of channel state information (CSI), a distribution-free robust game is formulated. A robust-optimization equilibrium (RE) is proposed where each player formulates a best… (More)

- Wenwu Wang, Darren Cosker, Yulia Hicks, Saeid Sanei, Jonathon A. Chambers
- ICASSP
- 2005

In this paper we investigate the problem of integrating the complementary audio and visual modalities for speech separation. Rather than using independence criteria suggested in most blind source separation (BSS) systems, we use the visual feature from a video signal as additional information to optimize the unmixing matrix. We achieve this by using a… (More)

- Gaojie Chen, Yu Gong, Pei Xiao, Jonathon A. Chambers
- IEEE Transactions on Information Forensics and…
- 2015

This paper investigates the secrecy performance of full-duplex relay (FDR) networks. The resulting analysis shows that FDR networks have better secrecy performance than half duplex relay networks, if the self-interference can be well suppressed. We also propose a full duplex jamming relay network, in which the relay node transmits jamming signals while… (More)

- Jens Baltersee, Jonathon A. Chambers
- IEEE Trans. Signal Processing
- 1998

New learning algorithms for an adaptive nonlinear forward predictor that is based on a pipelined recurrent neural network (PRNN) are presented. A computationally efficient gradient descent (GD) learning algorithm, together with a novel extended recursive least squares (ERLS) learning algorithm, are proposed. Simulation studies based on three speech signals… (More)

- Sajid Ahmed, Mathini Sellathurai, Sangarapillai Lambotharan, Jonathon A. Chambers
- IEEE Signal Processing Letters
- 2006

Orthogonal frequency division multiplexing (OFDM) requires an expensive linear amplifier at the transmitter due to its high peak-to-average power ratio (PAPR). Single carrier with cyclic prefix (SC-CP) is a closely related transmission scheme that possesses most of the benefits of OFDM but does not have the PAPR problem. Although in a multipath environment,… (More)

- Leilei Li, Jonathon A. Chambers, Cassio G. Lopes, Ali H. Sayed
- IEEE Transactions on Signal Processing
- 2010

We study the problem of distributed estimation based on the affine projection algorithm (APA), which is developed from Newton's method for minimizing a cost function. The proposed solution is formulated to ameliorate the limited convergence properties of least-mean-square (LMS) type distributed adaptive filters with colored inputs. The analysis of transient… (More)

- Maria G. Jafari, Jonathon A. Chambers
- IEEE Trans. Biomed. Engineering
- 2005

This paper addresses the problem of fetal electrocardiogram extraction using blind source separation (BSS) in the wavelet domain. A new approach is proposed, which is particularly advantageous when the mixing environment is noisy and time-varying, and that is shown, analytically and in simulation, to improve the convergence rate of the natural gradient… (More)