WFRF:(Ingemarsson Carl 1983 )
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- Gustafsson, Oscar,1973-Linköpings universitet,Datorteknik,Tekniska fakulteten (author)
Approximate Neumann Series or Exact Matrix Inversion for Massive MIMO? (Invited Paper)
- Article/chapterEnglish2017
Publisher, publication year, extent ...
- Institute of Electrical and Electronics Engineers (IEEE),2017
- electronicrdacarrier
Numbers
- LIBRIS-ID:oai:DiVA.org:liu-139337
- https://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-139337URI
- https://doi.org/10.1109/ARITH.2017.11DOI
Supplementary language notes
- Language:English
- Summary in:English
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- SwePubSwePub
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Notes
- Approximate matrix inversion based on Neumann series has seen a recent increased interest motivated by massive MIMO systems. There, the matrices are in many cases diagonally dominant, and, hence, a reasonable approximation can be obtained within a few iterations of a Neumann series. In this work, we clarify that the complexity of exact methods are about the same as when three terms are used for the Neumann series, so in this case, the complexity is not lower as often claimed. The second common argument for Neumann series approximation, higher parallelism, is indeed correct. However, in most current practical use cases, such a high degree of parallelism is not required to obtain a low latency realization. Hence, we conclude that a careful evaluation, based on accuracy and latency requirements must be performed and that exact matrix inversion is in fact viable in many more cases than the current literature claims.
Subject headings and genre
- TEKNIK OCH TEKNOLOGIER Elektroteknik och elektronik Datorsystem hsv//swe
- ENGINEERING AND TECHNOLOGY Electrical Engineering, Electronic Engineering, Information Engineering Computer Systems hsv//eng
- TEKNIK OCH TEKNOLOGIER Elektroteknik och elektronik Signalbehandling hsv//swe
- ENGINEERING AND TECHNOLOGY Electrical Engineering, Electronic Engineering, Information Engineering Signal Processing hsv//eng
- TEKNIK OCH TEKNOLOGIER Elektroteknik och elektronik Kommunikationssystem hsv//swe
- ENGINEERING AND TECHNOLOGY Electrical Engineering, Electronic Engineering, Information Engineering Communication Systems hsv//eng
- matrix inversion
- complexity
- parallel processing
- massive MIMO
Added entries (persons, corporate bodies, meetings, titles ...)
- Bertilsson, Erik,1990-Linköpings universitet,Datorteknik,Tekniska fakulteten(Swepub:liu)eribe24 (author)
- Klasson, JohannesLinköpings universitet,Datorteknik,Tekniska fakulteten (author)
- Ingemarsson, Carl,1983-Linköpings universitet,Datorteknik,Tekniska fakulteten(Swepub:liu)carin50 (author)
- Linköpings universitetDatorteknik (creator_code:org_t)
Related titles
- In:Proceedings 2017 IEEE 24th Symposium on Computer Arithmetic (ARITH), London, UK, 24-26 July 2017: Institute of Electrical and Electronics Engineers (IEEE), s. 62-63978153861965097815386196439781538619667
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