Alan Gatherer

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Anwar Alwardi

University of Mysore

Amir Mosavi

German Research Center for Artificial Intelligence

Rivo S. A. RANDRIATSIFERANA

Université de la Réunion

spyros G tzafestas

National Technical University of Athens

Bulent Yesilata

Ankara Yildirim Beyazit University

Emil Frenski

South-Western University - Blagoevgrad

Ali Mohammad Afshin Hemmatyar

Sharif University of Technology

Mashhoor Al Tarayrah

King Faisal University

Nada Yassen Kasm Yahya

University Of Mosul

Dr. Shailesh Saxena

APJ Abdul kalam technological university

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Papers by Alan Gatherer

PAR reduction for DMT systems with unloaded subchannels

Conference Record of the Thirty-Sixth Asilomar Conference on Signals, Systems and Computers, 2002.

The inverse discrete Fourier transform used by discrete multitone modulation produces transmitted... more The inverse discrete Fourier transform used by discrete multitone modulation produces transmitted signals with a large peak-to-average ratio. Peak-to-average ratio reduction methods allow the transmitter to reduce the probability of clipping, or maintain the same probability of clipping while reducing the dynamic range requirements of the analog front end. In this paper we propose a method of peak-to-average ratio reduction

Frequency domain position estimation for lithographic alignment

IEEE International Conference on Acoustics Speech and Signal Processing, 1993

ABSTRACT We describe a frequency domain based algorithm for esti-mating the podtion of a symmetri... more

A multiplier unit

Transmission adjustment in frequency hopping wireless communications

Multiple sampling frame synchronization

Phase estimation in carrier recovery for QAM signals

Estimation and correction of clipping in a discrete multi-tone communications system

Apparatus and method for timing recovery for vestigial side band modulation system

Achieving flexibility in a Viterbi decoder DSP coprocessor

Vehicular Technology Conference Fall 2000. IEEE VTS Fall VTC2000. 52nd Vehicular Technology Conference (Cat. No.00CH37152)

A Viterbi decoder hardware implementation suitable for wireless cellular applications is presente... more A Viterbi decoder hardware implementation suitable for wireless cellular applications is presented. This decoder is extremely flexible, both in the codes it handles, and in its system interface. Capabilities include multiple constraint lengths, multiple code rates, arbitrary frame size, puncturing and code polynomials. This paper discusses aspects of the implementation for which achieving this flexibility proved to be difficult. With a data throughput rate of 2.5 Mbps it is an ideal solution for 3rd generation base station architectures operating in conjunction with a DSP.

Wireless transmitter and receiver

IC generating packets containing destination, first, and second proxy addresses

Spread spectrum multipath combination

Trellis shaping for PCM modems

Downlink synchronization for a cellular OFDM communication system

Phase estimation in carrier recovery of phase-modulated signals such as QAM signals

Correlation using only selected chip position samples in a wireless communication system

Methods and device for estimating and correcting clipping in a discrete multi-tone communications system

Efficient implementation of error approximation in blind equalization of data communications

Interleaved coder and method

Methods and linecard device for allocating multiple timeslots over digital backplane