A comparative study of pilot-based channel estimators for wireless OFDM
1996 (English)Report (Other academic)
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.
Place, publisher, year, edition, pages
Luleå: Luleå tekniska universitet, 1996. , 34 p.
Research report / Luleå University of Technology1 jan 1974 → 31 dec 1996, ISSN 0347-0881 ; 1996:19
Research subject Signal Processing
IdentifiersURN: urn:nbn:se:ltu:diva-24723Local ID: c34a4e60-df8a-11dc-9e29-000ea68e967bOAI: oai:DiVA.org:ltu-24723DiVA: diva2:997775
Godkänd; 1996; 20080220 (ysko)2016-09-292016-09-29Bibliographically approved