NDLI: On channel capacity of OFDM with SLM method for PAPR reduction

Content Provider	IEEE Xplore Digital Library
Author	Handali, Y. Nizan, I. Wulich, D.
Copyright Year	2006
Description	Author affiliation: Ben-Gurion University of the Negev, Department of Electrical and Computer Engineering, Communications Laboratory, Beer-Sheva 84105, ISRAEL. Tel: ++972-8-6472416, Fax: ++972-8-6472949 (Handali, Y.; Nizan, I.) \|\| Ben-Gurion University of the Negev, Department of Electrical and Computer Engineering, Communications Laboratory, Beer-Sheva 84105, ISRAEL. Tel: ++972-8-6472416, Fax: ++972-8-6472949, e-mail: dov@ee.bgu.ac.il (Wulich, D.)
Abstract	One major drawback of OFDM is the large Peak to Average Power Ratio (PAPR). OFDM is a linear modulation, therefore large PAPR requires large linear dynamic range of the transmitter (TX) as well as the receiver (RX) paths. The weak point in the TX-RX chain is the Power Amplifier (PA). As known, a linear PA which is able to amplify signals with large PAPR has to have a large dynamic range that results with low power efficiency, thus by reducing PAPR one may improve the efficiency of PA. A PAPR reducing method in OFDM, based on SeLective Mapping (SLM) is considered. As known, SLM requires transmitting a Side Information (SI). Increasing the SLM order reduces the PAPR but increases the size of SI. In order to transmit the SI some power and bandwidth are needed, those are taken from the total power and bandwidth budget and thus lowering the capacity. On the other hand the reduced PAPR improves the PA efficiency, thus increases the channel capacity. Accordingly maximal value of channel capacity is expected as well as an optimal SLM order.
Starting Page	138
Ending Page	140
File Size	2694704
Page Count	3
File Format	PDF
ISBN	1424402298
DOI	10.1109/EEEI.2006.321129
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-11-15
Publisher Place	Israel
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Channel capacity Peak to average power ratio Dynamic range OFDM modulation Bandwidth Laboratories High power amplifiers Transmitters Power amplifiers Signal mapping
Content Type	Text
Resource Type	Article

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