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Rayleigh Fading Multiple Access Channel without Channel State Information

Ninoslav Marina

In this paper we determine bounds of the capacity region of a two-user multiple-access channel with Rayleigh fading when neither the transmitters nor the receiver has channel state information (CSI). We assume that the fading coefficients as well as the ad ...

2004

A divide-and-conquer algorithm for channel estimation in multi-user space-time coded transmissions

Ali H. Sayed

We develop channel estimation techniques for multiple-input multiple-output (MIMO) channels that employ space-time block-coded (STBC) transmissions. We derive the MMSE channel estimator for multi-user Alamouti STBC transmissions over both flat fading and f ...

2004

Fundamentals of adaptive filtering

Ali H. Sayed

This graduate-level textbook offers a comprehensive and up-to-date treatment of adaptive filtering; a vast and fast-moving field. The book is logically organized, specific in its presentation of each topic, and far-reaching in scope. Throughout the present ...

John Wiley & Sons2003

Adaptive predictive power control for the uplink channel in ds-cdma cellular systems

Ali H. Sayed

In this paper, we analyze the conventional closed-loop power-control system. We explain that the system behaves essentially as a companded delta modulator and then derive an expression for the power-control error in terms of the channel fading, which sugge ...

IEEE2003

Efficient adaptive receivers for joint equalization and interference cancellation in multiuser space-time block-coded systems

Ali H. Sayed

This paper develops low-complexity adaptive receivers for space-time block-coded (STBC) transmissions over frequency-selective fading channels. The receivers are useful for equalization purposes for single user transmissions and for joint equalization and ...

IEEE2003

Robust wireless location over fading channels

Ali H. Sayed

This paper develops an estimation algorithm for the time and amplitude of arrival of a known transmitted sequence over a single-path fading channel. The algorithm is optimized to enhance robustness to fast channel fading and low signal-to-noise ratio (SNR) ...

IEEE2003

Inverse closed-loop power control for CDMA wireless systems

Ali H. Sayed

In this work, two algorithms for closed loop power control in CDMA wireless systems are proposed. These algorithms aim to minimize the power control error by predicting the inverse of the channel fading: For this purpose, a channel fading prediction scheme ...

2002

Prefiltered M-BCJR Equalizer for MIMO Frequency-Selective Channels

Christina Fragouli, Suhas Diggavi

This paper addresses the problem of soft equalization for space-time-coded transmissions over frequency-selective fading channels. The structure of the space-time code is embedded in the channel impulse response for efficient joint equalization and decodin ...

2002

Channel estimation and equalization in fading

Ali H. Sayed, Christina Fragouli

This paper addresses the problem of channel tracking and equalization in frequency-selective fading channels. Low-order autoregressive models approximate the channel taps, where each tap is a circular complex Gaussian random process with the typical U-shap ...

1999