Time Varying Narrowband Communications Channels: Analysis and Implementation

Time Varying Narrowband Communications Channels: Analysis and Implementation (2007)

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by Niklas Grip , Götz E. Pfander

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Datum	Value	Source
TITLE	Time Varying Narrowband Communications Channels: Analysis and Implementation	user correction
AUTHOR NAME	Niklas Grip	user correction
AUTHOR AFFIL	Department of Mathematics; Luleå University of Technology	user correction
AUTHOR ADDR	SE-971 87 Luleå; Sweden	user correction
AUTHOR NAME	Götz E. Pfander	user correction
AUTHOR AFFIL	School of Engineering and Science; Jacobs University Bremen	user correction
AUTHOR ADDR	Campus Ring 12; 28759 Bremen; Germany	user correction
ABSTRACT	We derive and describe a Matlab implementation of an efficient numerical algorithm for the analysis of certain classes of Hilbert–Schmidt operators that naturally occur in models of wireless radio and sonar communications channels. A common short-time model of these channels writes the channel output as a weighted superposition of time- and frequency shifted copies of the transmitted signal, where the weight function is often called the spreading function of the channel operator. It is often believed that a good channel model must allow for spreading functions containing Dirac delta distributions. However, we show that many narrowband finite lifelength channels such as wireless radio communications can be well modelled by smooth and compactly supported spreading functions. We derive a fast algorithm for computing the matrix representation of such operators with respect to well time-frequency localized Gabor bases, such as pulse shaped OFDM bases. Hereby we use a minimum of approximations, simplifications, and assumptions on the channel. The primary intended target application	user correction
YEAR	2007	SVM HeaderParse 0.2
CITATIONS	45 found	ParsCit 1.0