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2011

Algorithms for Interpolation-Based QR Decomposition in MIMO-OFDM Systems

11 years 4 months ago
Algorithms for Interpolation-Based QR Decomposition in MIMO-OFDM Systems
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 DVBT 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.
Davide Cescato, Helmut Bölcskei
Added 15 May 2011
Updated 15 May 2011
Type Journal
Year 2011
Where TSP
Authors Davide Cescato, Helmut Bölcskei
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