Revisiting MMSE Combining for Massive MIMO over Heterogeneous Propagation Channels

Harsh Tataria, Peter J Smith, Michail Matthaiou, Hien Quoc Ngo, Pawel A Dmochowski

Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceedingpeer-review

Abstract

We consider a massive multiple-input multiple- output system with minimum-mean-squared-error processing on the uplink. A novel analytical framework is proposed to approximate the instantaneous signal-to-interference-plus-noise- ratio (SINR) of an arbitrary user terminal, as well as, the system sum spectral efficiency. Unlike previous studies, our methodology considers spatially correlated Ricean fading, with unequal Ricean K-factors, spatial correlation matrices and link gains across all terminals. Under this fully heterogeneous setting, we demonstrate that the SINR of a terminal can be tightly approximated by a linear combination of non-central chi-squared random variables, where the scaling depends on the individual link gains, K-factors, and eigenvalues of the terminal specific correlation matrices. Our approximations remain tight across the considered spatial correlation models, K-factor models, average uplink signal-to-noise-ratios and number of receive antennas. Leveraging the general form of the SINR and sum spectral efficiency, an analytical method to approximate their statistical moments is presented utilizing the moment generating function. The generality of the aforementioned analytical results is demonstrated via several special cases of practical relevance.
Original languageEnglish
Title of host publicationIEEE International Conference on Communications (ICC) 2018
PublisherIEEE - Institute of Electrical and Electronics Engineers Inc.
Number of pages7
ISBN (Electronic)978-1-5386-3180-5
ISBN (Print)978-1-5386-3181-2
DOIs
Publication statusPublished - 2018 May 23
EventIEEE International Conference on Communications (ICC) 2018 - Sheraton Kansas City Hotel, Kansas City, United States
Duration: 2018 May 232018 May 27
http://icc2018.ieee-icc.org/content/welcome-ieee-icc-2018

Conference

ConferenceIEEE International Conference on Communications (ICC) 2018
Abbreviated titleICC
Country/TerritoryUnited States
CityKansas City
Period2018/05/232018/05/27
Internet address

Subject classification (UKÄ)

  • Communication Systems

Free keywords

  • MMSE combining
  • Massive MIMO
  • SINR analysis
  • Ricean fading channels
  • Heterogeneous systems

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