NDLI: Joint interference mitigation approach using space-time pilot design in large-scale antenna systems

Content Provider	IET Digital Library
Author	Wang, Pengbiao Li, Rong Zhao, Chenglin Liu, Xiaokai Zhang, Yang
Abstract	This study addresses the problem of interference mitigation in multi-cell time division duplex cellular networks with large-scale antennas. Network performance in such systems is hampered by pilot contamination effect, which results in the inter-cell interference. To mitigate the interference, the authors propose a space-time pilot design-based approach to jointly eliminate interference from both time domain and space domain. The authors’ space-time pilot design divides a cellular network into different groups which proceed channel estimation alternately in time. Moreover, a low-rate coordination assisted pilot assignment scheme is added into each cell group during its pilot phase. This pilot assignment scheme relies on the minimum mean square of the updated Bayesian channel estimation. It can make use of the second-order statistical information about the users' channel vectors within the same group to assign an identical pilot sequence to users that tend to interfere with each other at a lower level. On the basis of space-time pilot design, the base station can proceed the maximal ratio transmitting and maximal ratio combining. With rigorous theoretic proof, their joint approach is able to significantly decrease interference. Simulations verified its excellent performance promotion.
Starting Page	253
Ending Page	262
Page Count	10
ISSN	17518628
Volume Number	10
e-ISSN	17518636
Issue Number	Issue 3, Feb (2016)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-com/10/3
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-com.2015.0385
Journal	IET Communications
Publisher Date	2016-02-11
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Antenna Array Bayes Method Cellular Radio Channel Estimation Channel Vector Communication Channel Equalisation And Identification Communication Switching Diversity Reception Electromagnetic Compatibility Interference Interference Suppression Interpolation And Function Approximation Joint Interference Elimination Joint Interference Mitigation Approach Large-scale Antenna System Least Mean Squares Method Linear Algebra Low-rate Coordination Assisted Pilot Assignment Scheme Maximal Ratio Combining Maximal Ratio Transmitting Minimum Mean Square Mobile Radio System Multicell Time Division Duplex Cellular Network Network Performance Numerical Analysis Pilot Contamination Effect Radio Frequency Interference Second-order Statistical Information Space Domain Space-time Pilot Design-based Approach Statistical Analysis Statistics Time Division Multiplexing Time Domain Updated Bayesian Channel Estimation Vector
Content Type	Text
Resource Type	Article
Subject	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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