Vector perturbation for single-carrier MU-MIMO downlink

Shohei Yoshioka, Shinya Kumagai, Fumiyuki Adachi

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

2 Citations (Scopus)

Abstract

In this paper, we propose two vector perturbation (VP) schemes for single-carrier (SC) multi-user (MU) multiple-input multiple-output (MIMO) downlink block transmission. The first VP scheme (called SC-VP-1) adds a perturbation vector to each user's signal block in time-domain and then, multiplies a precoding matrix to perturbation vector-added signal blocks in time-domain. The precoding matrix used in this paper takes into account delay waves unlike the conventional VP. In order to reduce the computational complexity of perturbation vector search, a combination of QR decomposition and M algorithm is applied. On the other hand, in the second VP scheme (called SC-VP-2), each user's perturbation vector-added time-domain signal block is transformed into the frequency-domain signal block before multiplying a precoding matrix. In SC-VP-2, unlike conventional VP and SC-VP-1, an equivalent time-domain expression for the frequency-domain precoding matrix multiplication is used for QR decomposition and M algorithm based perturbation vector search. The uncoded bit error rate (BER) performance achievable by SC-VP-1 and SC-VP-2 is evaluated by computer simulation. It is shown that SC-VP-1 and SC-VP-2 provide the same BER performance. It is also shown that SC-VP achieves better BER performance than both SC-MU-MIMO using channel inversion (CI) and orthogonal frequency division multiplexing (OFDM) MU-MIMO using VP (OFDM-VP). Computational complexity is compared among SC-VP-1, SC-VP-2, and OFDM-VP.

Original languageEnglish
Title of host publication2014 IEEE International Conference on Communication Systems, IEEE ICCS 2014
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages507-511
Number of pages5
ISBN (Electronic)9781479958320
DOIs
Publication statusPublished - 2014 Jan 27
Event2014 IEEE International Conference on Communication Systems, IEEE ICCS 2014 - Macau, China
Duration: 2014 Nov 192014 Nov 21

Publication series

Name2014 IEEE International Conference on Communication Systems, IEEE ICCS 2014

Other

Other2014 IEEE International Conference on Communication Systems, IEEE ICCS 2014
CountryChina
CityMacau
Period14/11/1914/11/21

Keywords

  • M algorithm
  • QR decomposition
  • SC-MU-MIMO
  • Vector Perturbation

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Information Systems

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  • Cite this

    Yoshioka, S., Kumagai, S., & Adachi, F. (2014). Vector perturbation for single-carrier MU-MIMO downlink. In 2014 IEEE International Conference on Communication Systems, IEEE ICCS 2014 (pp. 507-511). [7024855] (2014 IEEE International Conference on Communication Systems, IEEE ICCS 2014). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ICCS.2014.7024855