NDLI: A high energy efficient scheme with Selecting Sub-Carriers Modulation in OFDM system

Content Provider	IEEE Xplore Digital Library
Author	Long Zhao Hui Zhao Kan Zheng Yunchuan Yang
Copyright Year	2012
Description	Author affiliation: Key Laboratory of Universal Wireless Communication, Ministry of Education, Wireless Signal Processing & Network Lab, BUPT, Beijing, China (Long Zhao; Hui Zhao; Kan Zheng; Yunchuan Yang)
Abstract	With the tremendous growth in wireless networks market, unprecedented energy consumption and emissions of carbon dioxide (CO2) is a growing concern for both operators and governments. OFDM technology has been adopted by many standards organizations due to its high spectrum efficiency, but induces poor energy efficiency of power amplifier (PA). A new scheme named Selecting Sub-Carriers Modulation (SSCM) to lower the input power of PA is given in this paper. SSCM divides the information bits into two parts of bits according to modulation mode: the first part of bits selects some sub-carriers of OFDM to transmit nothing, another part of bits is transmitted by the remainder sub-carriers. Sub-carriers transmitting nothing do not need energy, and fewer number of sub-carriers transmitting modulation symbols can improve PA's efficiency because of the lower peak-to-average power ratio (PAPR). Analysis results show SSCM with different modulation modes can lower input power of PA with different proportion compared with traditional OFDM. Theoretical analysis and simulation results of the reliability of SSCM are given and match closely. In multi-path channel, SSCM with BPSK has the same performance as BPSK in traditional OFDM, while SSCM with QPSK performs worse than QPSK in traditional OFDM.
Starting Page	5711
Ending Page	5715
File Size	409022
Page Count	5
File Format	PDF
ISBN	9781457720529
ISSN	15503607
e-ISBN	9781457720536
e-ISBN	9781457720512
DOI	10.1109/ICC.2012.6364774
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-06-10
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Peak to average power ratio Binary phase shift keying Energy efficiency Energy consumption SSCM Green Communication Energy Efficiency OFDM PA
Content Type	Text
Resource Type	Article

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