A comparison of DFT and SVD based channel estimation in MIMO OFDM systems

Hammarberg, PeterLund University,Lunds universitet,Institutionen för elektro- och informationsteknik,Institutioner vid LTH,Lunds Tekniska Högskola,Department of Electrical and Information Technology,Departments at LTH,Faculty of Engineering, LTH (författare)

In this paper two simplified transform based estimators for MIMO OFDM systems using the DFT and an SVD based transform are compared over a tapped delay line channel model. In the resulting symbol error rate plots, it is seen that the DFT based estimator experiences an error floor caused by the mismatch between the discrete time model and a continuous time reality. This error floor becomes a problem at high SNR levels where high data-rate systems can be expected to operate. When using an SVD based estimator it is seen that this error floor is reduced at the cost of a somewhat increased estimator complexity

TEKNIK OCH TEKNOLOGIER Elektroteknik och elektronik hsv//swe
ENGINEERING AND TECHNOLOGY Electrical Engineering, Electronic Engineering, Information Engineering hsv//eng
symbol error rate
tapped delay line channel model
orthogonal frequency division multiplexing
multiple input multiple output systems
MIMO OFDM systems
singular value decomposition
SVD based channel estimation
DFT based channel estimation
discrete Fourier transform
SNR
signal-to-noise ratio
high data-rate systems
discrete time model
continuous time reality

Edfors, OveLund University,Lunds universitet,Institutionen för elektro- och informationsteknik,Institutioner vid LTH,Lunds Tekniska Högskola,Department of Electrical and Information Technology,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)tde-oed (författare)
Institutionen för elektro- och informationsteknikInstitutioner vid LTH (creator_code:org_t)

Ingår i:2006 IEEE 17th International Symposium on Personal, Indoor and Mobile Radio Communications (IEEE Cat. No. 06TH8881)1424403294

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