Soft MIMO detection at fixed complexity
2007 (English)In: GLOBECOM 2007: 2007 IEEE GLOBAL TELECOMMUNICATIONS CONFERENCE, 2007, 1617-1621 p.Conference paper (Refereed)
This paper presents a new approach to soft demodulation for MIMO channels. The proposed method is an approximation to the exact a posteriori probability-per-bit computer. The main idea is to marginalize the posterior density for the received data exactly over the subset of the transmitted bits that are received with the lowest signal-to-noise-ratio, and then marginalize this density approximately over the remaining bits. Unlike the exact demodulator, whose complexity is huge due to the need for enumerating all possible combinations of transmitted constellation points, the proposed method has very low complexity. Additionally, its complexity is fixed, which makes it suitable for pipelined implementation. Numerical examples illustrate its performance on slow fading 4 x 4 and 6 x 6 complex MIMO channels.
Place, publisher, year, edition, pages
2007. 1617-1621 p.
, IEEE Global Telecommunications Conference (Globecom), ISSN 1930-529X
IdentifiersURN: urn:nbn:se:kth:diva-34914DOI: 10.1109/GLOCOM.2007.311ISI: 000257505701115ScopusID: 2-s2.0-39349101421ISBN: 978-1-4244-1042-2OAI: oai:DiVA.org:kth-34914DiVA: diva2:428718
IEEE Global Telecommunications Conference (GLOBECOM 07) Washington, DC, NOV 26-30, 2007