Theoretical Limits on Time Delay Estimation for Ultra-Wideband Cognitive Radios
Information Theory
2016-11-17 v1 math.IT
Abstract
In this paper, theoretical limits on time delay estimation are studied for ultra-wideband (UWB) cognitive radio systems. For a generic UWB spectrum with dispersed bands, the Cramer-Rao lower bound (CRLB) is derived for unknown channel coefficients and carrier-frequency offsets (CFOs). Then, the effects of unknown channel coefficients and CFOs are investigated for linearly and non-linearly modulated training signals by obtaining specific CRLB expressions. It is shown that for linear modulations with a constant envelope, the effects of the unknown parameters can be mitigated. Finally, numerical results, which support the theoretical analysis, are presented.
Keywords
Cite
@article{arxiv.0906.3988,
title = {Theoretical Limits on Time Delay Estimation for Ultra-Wideband Cognitive Radios},
author = {Sinan Gezici and Hasari Celebi and Huseyin Arslan and H. Vincent Poor},
journal= {arXiv preprint arXiv:0906.3988},
year = {2016}
}
Comments
IEEE ICUWB 2008