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Unstructured approaches for the estimation of ultra-wideband (UWB) channels are investigated, namely optimal maximum likelihood (ML) estimation, suboptimal least squares (LS) estimation, and the so-called pilot symbol assisted modulation (PSAM) estimation techniques. Moreover, closed form expressions for the maximum likelihood for a UWB system and an optimum sequence design technique for the LS scheme are derived. Performance analysis in terms of the minimum squared error (MSE) and accuracy in terms of the Cramer-Rao lower bound (CRLB) are provided. The trade-off between performance and complexity is shown for each reported estimation technique.
Published in:
Communications, IEE Proceedings-
(Volume:152
,
Issue:
2
)
Date of Publication: 8 April 2005
- Page(s):
- 241 - 245
- ISSN :
- 1350-2425
- INSPEC Accession Number:
- 8403508
- Digital Object Identifier :
- 10.1049/ip-com:20045054
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 23 May 2005
- Issue Date :
- 8 April 2005
- Sponsored by :
- IET
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