NDLI: Over-The-Air Phase Synchronization Mechanism for LTE Small Cells in Interference-Limited Scenarios

Content Provider	IEEE Xplore Digital Library
Author	Lorca, J.
Copyright Year	2013
Description	Author affiliation: Transversal Projects & Innovation Telefonica I+D, Madrid, Spain (Lorca, J.)
Abstract	Phase synchronization is one of the most important features needed in some of the techniques envisaged for LTE-Advanced, such as Cooperative Multi-Point (CoMP) or enhanced inter-cell interference coordination (eICIC), among others. Phase synchronization can be accomplished through the use of IEEE 1588v2 or GPS receivers. However when dealing with small cells deployed in an uncoordinated manner, such as Home-eNBs, the use of IEEE 1588v2 is not always feasible due to delay and jitter impairments which can be present in xDSL lines. Moreover, GPS receivers are not operative in indoors. The present paper describes an over-the-air synchronization mechanism whereby already synchronized LTE macro cells transmit a new physical signal on a subset of yet unused resource elements, so that small cells can acquire suitable phase synchronization. As the involved resources are reserved and not used for transmission, interference is much lower and signal to noise ratio can be improved compared to traditional network listening modes. Simulations employing a simple proposed receiver structure show very good results in channels where the delay spread is within the length of the cyclic prefix.
Sponsorship	IEEE Vehicular Technol. Soc.
Starting Page	1
Ending Page	5
File Size	342334
Page Count	5
File Format	PDF
ISBN	9781467363372
ISSN	15502252
DOI	10.1109/VTCSpring.2013.6692688
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-06-02
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Synchronization Signal to noise ratio OFDM Delays Interference Coherence Bandwidth
Content Type	Text
Resource Type	Article
Subject	Applied Mathematics Electrical and Electronic Engineering Computer Science Applications

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
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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