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A comparative study...
A comparative study of pilot-based channel estimators for wireless OFDM
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- Sandell, Magnus (author)
- Luleå tekniska universitet
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- Edfors, Ove (author)
- Luleå tekniska universitet
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(creator_code:org_t)
- Luleå : Luleå tekniska universitet, 1996
- English 34 s.
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Series: Forskningsrapport / Högskolan i Luleå 1 jan 1974 → 31 dec 1996, 0347-0881 ; 1996:19
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Abstract
Subject headings
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- This report deals with pilot-based channel estimation in wireless OFDM systems. We assume that the receiver is able to use all transmitted pilots, which is the case in broadcasting and in the downlink of a multiuser system. Four estimators (of which two have been proposed in the literature) are compared, both in terms of mean-squared error and bit-error rates. In the latter case, we simulate a multiuser system which incorporates channel coding. The channel estimation is a two-dimensional problem (time and frequency), and both separable and non-separable estimators are investigated. We design low-rank approximations of these estimators, and compare the performance at given complexities. The comparison shows that the use of separable estimators increases the performance substantially, compared to non-separable estimators with the same complexity. For the scenario investigated in this report the performance is further improved by applying low-rank approximations separable estimators.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Elektroteknik och elektronik -- Signalbehandling (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering -- Signal Processing (hsv//eng)
Keyword
- Signalbehandling
- Signal Processing
Publication and Content Type
- vet (subject category)
- rap (subject category)
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