Detection in large-scale multiuser SM-MIMO systems: algorithms and performance

P. Raviteja, T. Lakshmi Narasimhan, A. Chockalingam

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

8 Citations (Scopus)

Abstract

In this paper, we propose algorithms for signal detection in large-scale multiuser spatial modulation multiple-input multiple-output (SM-MIMO) systems. In large-scale SM-MIMO, each user is equipped with multiple transmit antennas (e.g., 2 or 4 antennas) but only one transmit RF chain, and the base station (BS) is equipped with tens to hundreds of (e.g., 128) receive antennas. In SM-MIMO, in a given channel use, each user activates any one of its multiple transmit antennas and the index of the activated antenna conveys information bits in addition to the information bits conveyed through conventional modulation symbols (e.g., QAM). We propose two different algorithms for detection of large-scale SM-MIMO signals at the BS; one is based on { message passing and the other is based on local search. The proposed algorithms are shown to achieve very good performance and scale well. Also, for the same spectral efficiency, multiuser SM-MIMO outperforms conventional multiuser MIMO (recently being referred to as massive MIMO) by several dBs; for e.g., with 16 users, 128 antennas at the BS and 4 bpcu per user, SM-MIMO with 4 transmit antennas per user and 4-QAM outperforms massive MIMO with 1 transmit antenna per user and 16-QAM by about 4 to 5 dB at 10-3 uncoded BER. This SNR advantage essentially comes about because the spatial index bits allow SM-MIMO to achieve a given spectral efficiency using a lower order modulation alphabet than in conventional multiuser MIMO.

Original languageEnglish
Title of host publication2014 IEEE 79th Vehicular Technology Conference (VTC2014-Spring), Proceedings
EditorsSeong-Cheol Kim, Saewoong Bahk
Place of PublicationPiscataway NJ USA
PublisherIEEE, Institute of Electrical and Electronics Engineers
Number of pages5
ISBN (Electronic)9781479944835
ISBN (Print)9781479944828
DOIs
Publication statusPublished - 2014
Externally publishedYes
EventIEEE Vehicular Technology Conference 2014: Spring - Seoul, Korea, Republic of (South)
Duration: 18 May 201421 May 2014
Conference number: 79th

Publication series

NameIEEE Vehicular Technology Conference
PublisherIEEE, Institute of Electrical and Electronics Engineers
ISSN (Print)1550-2252

Conference

ConferenceIEEE Vehicular Technology Conference 2014
Abbreviated titleVTC 2014
CountryKorea, Republic of (South)
CitySeoul
Period18/05/1421/05/14

Cite this

Raviteja, P., Narasimhan, T. L., & Chockalingam, A. (2014). Detection in large-scale multiuser SM-MIMO systems: algorithms and performance. In S-C. Kim, & S. Bahk (Eds.), 2014 IEEE 79th Vehicular Technology Conference (VTC2014-Spring), Proceedings (IEEE Vehicular Technology Conference). IEEE, Institute of Electrical and Electronics Engineers. https://doi.org/10.1109/VTCSpring.2014.7022877