Distributed LMMSE estimation in cooperative cellular networks

Senanayake Mudiyanselage Rajit Senanayake, Phee Lep Yeoh, Jamie Scott Evans

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1 Citation (Scopus)

Abstract

We consider a cooperative cellular network with multiple users transmitting within a cooperative cluster of multiple antenna base stations. Different from global cooperation where all the signal processing is performed at a central processor, we analyze a distributed processing architecture that performs the estimation of user symbols in two steps, namely, 1) Local LMMSE estimation of the user symbols at each base station, and 2) Central combining of all the estimates from the base stations. For such a network, we derive new expressions for the capacity of a given user with independent Rayleigh fading and arbitrary path loss between the users and all the antennas at the base stations. Our capacity expression is based on accurate approximations we derive for the characteristic function and the probability density function of the users signal-to-interference-plus-noise ratios (SINRs). Numerical examples demonstrate that our analytical solutions accurately approximate the exact capacity. Furthermore, we highlight that the distributed approach introduces less overhead to the network compared with global cooperation. We note that the performance gap is small when the network is lightly loaded
Original languageEnglish
Title of host publication2015 IEEE International Conference on Communication (ICC 2015)
EditorsNathan Gomes, Athanassios Manikas
Place of PublicationPiscataway NJ USA
PublisherIEEE, Institute of Electrical and Electronics Engineers
Pages4083 - 4088
Number of pages6
ISBN (Print)9781467364324
DOIs
Publication statusPublished - 2015
EventIEEE International Conference on Communications 2015: Smart City & Smart World - London, United Kingdom
Duration: 8 Jun 201512 Jun 2015
http://icc2015.ieee-icc.org/ (Website)
http://ieeexplore.ieee.org/xpl/mostRecentIssue.jsp?punumber=7225357 (IEEE Conference proceedings)

Conference

ConferenceIEEE International Conference on Communications 2015
Abbreviated titleICC 2015
CountryUnited Kingdom
CityLondon
Period8/06/1512/06/15
Other2015 IEEE International Conference on Communications (ICC2015), held in the magnificent city of London, the UK’s capital. ICC2015 will be an excellent presentation, networking and publicity event, offering the opportunity for researchers, engineers and business people to meet and exchange ideas and information. In addition to the traditional keynote, symposium, workshop, tutorial and industry forum sessions, this year we are offering a new event – Chief Technology Officer Forum - during the plenary session. Here, the future of mobile networks will be discussed.
Internet address

Keywords

  • Base station cooperation
  • Capacity
  • Multiuser detection
  • LMMSE
  • Rayleigh fading

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