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Author Lioumpas, A.S. ♦ Karagiannidis, G.K.
Source IEEE Xplore Digital Library
Content type Text
Publisher Institute of Electrical and Electronics Engineers, Inc. (IEEE)
File Format PDF
Copyright Year ©1972
Language English
Subject Domain (in DDC) Natural sciences & mathematics ♦ Physics ♦ Electricity & electronics
Subject Keyword Amplitude estimation ♦ Virtual reality ♦ Diversity reception ♦ Channel estimation ♦ Power transmission ♦ Fading ♦ Constellation diagram ♦ Sampling methods ♦ Signal to noise ratio ♦ Signal analysis ♦ Adaptive modulation, equal gain combining, fading channels
Abstract Channel estimation at the receiver side is essential to adaptive modulation schemes, prohibiting low complexity systems from using variable rate and/or variable power transmissions. Towards providing a solution to this problem, we introduce a variable-rate (VR) M-PSK modulation scheme, for communications over fading channels, in the absence of channel gain estimation at the receiver. The choice of the constellation size is based on the signal-plus-noise (S+N) sampling value rather than on the signal-to-noise ratio (S/N). It is analytically shown that S+N can serve as an attractive simpler criterion, alternative to S/N, for determining the modulation order in VR systems. In this way, low complexity transceivers can use VR transmissions in order to increase their spectral efficiency under an error performance constraint. As an application, we utilize the proposed VR modulation scheme in equal gain combining (EGC) diversity receivers.
Description Author affiliation :: Dept. of Electr. & Comput. Eng., Aristotle Univ. of Thessaloniki, Thessaloniki, Greece
ISSN 00906778
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2010-05-01
Publisher Place U.S.A.
Rights Holder Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Volume Number 58
Issue Number 5
Size (in Bytes) 546.35 kB

Source: IEEE Xplore Digital Library