DocumentCode
1243192
Title
Optimum Receiver Filters in Digital Quadrature Phase-Shift-Keyed Systems with a Nonlinear Repeater
Author
Fredricsson, Staffan A.
Author_Institution
Telefonaktiebolaget LM Ericsson, Stockholm, Sweden
Volume
23
Issue
12
fYear
1975
fDate
12/1/1975 12:00:00 AM
Firstpage
1389
Lastpage
1399
Abstract
The effects of filter shaping and nonlinearity in a coherent quadrature phase-shift-keyed (QPSK) system are investigated. Optimization of the receiver filter with respect to the meansquare error (MSE) is considered. Optimization is performed under two different constraints, corresponding to implementation of the filter at intermediate frequency and baseband, respectively. As an example a channel with a typical traveling-wave tube (TWT) nonlinearity is studied. Numerical results are obtained which describe the effect of different transmitter filter characteristics on system performance.
Keywords
Filtering; Nonlinear distortions; PSK signal detection; Satellite communications; Bandwidth; Baseband; Digital filters; Gaussian noise; Linearity; Quadrature phase shift keying; Repeaters; Satellite communication; System performance; Transmitters;
fLanguage
English
Journal_Title
Communications, IEEE Transactions on
Publisher
ieee
ISSN
0090-6778
Type
jour
DOI
10.1109/TCOM.1975.1092763
Filename
1092763
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