NDLI: Suppress interference by symbol-misalignment

Content Provider	IEEE Xplore Digital Library
Author	Shengli Zhang Soung-Chang Liew Lu Lu Hui Wang
Copyright Year	2010
Description	Author affiliation: Communication Engineering Department, Shenzhen University, China (Shengli Zhang; Hui Wang) \|\| The Department of Information Engineering, the Chinese University of Hong Kong, Hong Kong (Soung-Chang Liew; Lu Lu)
Abstract	This paper studies the interference reduction, which is one the most important issue to increase the network throughput, improve the energy efficiency (green communication) and so on. In doing so, we first induce the system model consisting of one interfering node, based on several network examples. After that, the impact of time asynchrony between the interfering signal and the target signal is investigated. Interestingly, we show that the interference asynchrony can actually improve the BER performance, compared with the situation in which symbols of all signals are aligned. In particular, it is shown that symbol misalignment can decrease the “effective interference power” and change the distribution of the interfering signals, in a way that results in lower BER (or higher SINR equivalently). To ensure that symbol misalignment can be consistently attained, we propose a simple scheme that introduces time-varying symbol offsets to obtain an “average” performance of random symbol misalignment. Notably, our schemes do not change the simple receiver design structure; only the transmitters are modified in a minor way.
Starting Page	1
Ending Page	5
File Size	123369
Page Count	5
File Format	PDF
e-ISBN	9780984589333
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-08-25
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	ICST
Subject Keyword	Wireless networks Bit error rate Interference Receivers asynchronous multiple access Symbol misalignment Optical transmitters collision resolution Signal to noise ratio interference characterization
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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