Interpolation-based QR-decomposition in MIMO-OFDM systems

Jan Hansen, Davide Cescato, Moritz Borgmann, Helmut Boelcskei

Research output: Chapter in Book/Report/Conference proceedingConference paperpeer-review


The extension of multiple-input multiple-output (MIMO) sphere decoding from the narrowband case to wideband systems based on orthogonal frequency division multiplexing (OFDM) requires the computation of a QR decomposition for each of the data-carrying OFDM tones. Since the number of data-carrying tones ranges from 48 (as in the IEEE 802.11a/g standards) to 6817 (as in the DVB-T standard), the corresponding computational complexity will in general be significant. This paper presents two algorithms for interpolation-based QR decomposition in MIMO-OFDM systems. An in-depth computational complexity analysis shows that the proposed algorithms, for a sufficiently high number of data-carrying tones and small channel order exhibit significantly smaller complexity than brute-force per-tone QR decomposition
Original languageEnglish
Title of host publicationIEEE 6th Workshop on Signal Processing Advances in Wireless Communications (SPAWC)
Publication statusPublished - 5 Jun 2005
Externally publishedYes
EventIEEE 6th Workshop on Signal Processing Advances in Wireless Communications: SPAWC 2005 - New York, NY, United States
Duration: 5 Jun 20058 Jun 2005


ConferenceIEEE 6th Workshop on Signal Processing Advances in Wireless Communications
Abbreviated titleSPAWC 2005
Country/TerritoryUnited States
CityNew York, NY


Dive into the research topics of 'Interpolation-based QR-decomposition in MIMO-OFDM systems'. Together they form a unique fingerprint.

Cite this