NDLI: Energy-efficient transmission of DWT image over OFDM fading channel

Content Provider	IEEE Xplore Digital Library
Author	Sharma, A. De, S. Gupta, H.M.
Copyright Year	2011
Description	Author affiliation: Electrical Engineering Department, Indian Institute of Technology Delhi, New Delhi, India (Sharma, A.; De, S.; Gupta, H.M.)
Abstract	In many applications retransmission of lost packets are not permitted. In an OFDM system, due to channel fading, only a subset of carriers are usable for successful data transmission. If the channel state information is available at the transmitter, it is possible to take a proactive decision of mapping the descriptions optimally onto the good subcarriers and discard at the transmitter itself the remaining descriptions, which would have been otherwise dropped at the receiver due to unacceptably high channel errors. In this paper we present a energy saving approach to transmission of discrete wavelet transformation based compressed image frames over the OFDM channels. Based on one-bit channel state information at the transmitter, the descriptions in order of descending priority are assigned to the currently good channels. In order to reduce the system power consumption, the mapped descriptions onto the bad subchannels are dropped at the transmitter. Via analysis, supported by MATLAB simulations, we demonstrate the usefulness of our proposed scheme in terms of system energy saving without compromising the received quality in terms of peak signal-noise ratio.
Starting Page	1
Ending Page	7
File Size	346200
Page Count	7
File Format	PDF
ISBN	9781424489527
e-ISBN	9781424489534
e-ISBN	9781424489510
DOI	10.1109/COMSNETS.2011.5716514
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-01-04
Publisher Place	India
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	DWT-OFDM system Image coding Transmitters OFDM fading broadcast channel Receivers Rayleigh channels Discrete wavelet transforms energy saving channel state feedback
Content Type	Text
Resource Type	Article

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