How many degrees of freedom can be achieved for mutually interfering MIMO broadcast channels?

Hyukjin Chae, Sungyoon Cho, Kaibin Huang, Dong Ku Kim

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

In this paper, we consider homogeneous mutually interfering multiple-input multiple-output broadcast channels(MI-MIMO-BC). It is investigated that maximally achievable spatial degrees of freedom(DoF) for MI-MIMO-BC with constant channel coefficients. Assuming that there are two base station(BS) M transmit antennas, and each mobile stations(MS) has N receive antennas, it is shown that maximally min(M + N - 1, 2M) DoF can be achieved. We formulate zero intra- and inter-cell interference equations as function of the precoders and decoders. By checking solvability of these equations as multivariate polynomial equations, an achievable DoF upper bound can be obtained. To achieve the DoF upper bound, at least M + N - 1 MSs in each cell when M + N is an even number or equation MSs when M + N is an odd number are required. Our analysis is verified by numerical results.

Original languageEnglish
Title of host publicationConference Record of the 45th Asilomar Conference on Signals, Systems and Computers, ASILOMAR 2011
Pages1325-1329
Number of pages5
DOIs
Publication statusPublished - 2011 Dec 1
Event45th Asilomar Conference on Signals, Systems and Computers, ASILOMAR 2011 - Pacific Grove, CA, United States
Duration: 2011 Nov 62011 Nov 9

Other

Other45th Asilomar Conference on Signals, Systems and Computers, ASILOMAR 2011
CountryUnited States
CityPacific Grove, CA
Period11/11/611/11/9

All Science Journal Classification (ASJC) codes

  • Signal Processing
  • Computer Networks and Communications

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  • Cite this

    Chae, H., Cho, S., Huang, K., & Kim, D. K. (2011). How many degrees of freedom can be achieved for mutually interfering MIMO broadcast channels? In Conference Record of the 45th Asilomar Conference on Signals, Systems and Computers, ASILOMAR 2011 (pp. 1325-1329). [6190231] https://doi.org/10.1109/ACSSC.2011.6190231