Showing papers by "Mats Viberg published in 2003"
TL;DR: A superimposed periodic pilot scheme for finite-impulse response (FIR) channel estimation is proposed and the variance expression of the linear channel estimate is derived and compared with the Cramer-Rao bound.
Abstract: Multipath is a major impairment in a wireless communications environment, and channel estimation algorithms are of interest. We propose a superimposed periodic pilot scheme for finite-impulse response (FIR) channel estimation. A simple first-order statistic is used, and any FIR channel can be estimated. There is no loss of information rate but a controllable increase in transmission power. We derive the variance expression of our linear channel estimate and compare with the Cramer-Rao bound. Numerical examples illustrate the effectiveness of the proposed method.
151 citations
TL;DR: In this article, a new frequency domain subspace algorithm for the estimation of resonant frequencies and quality factors given the output from time domain computations is developed and tested, which applies the discrete Fourier transform to the time domain signal and estimates are computed from the frequency data within the frequency band of interest.
10 citations
TL;DR: In this paper, a frequency-domain subspace method was proposed to obtain accurate frequency and damping estimates in a selected frequency band, which can reduce the simulation time by several orders of magnitude.
4 citations
TL;DR: Despite not exploiting the model, the variance of the proposed non-parametric estimators is found to be close to the Cramer-Rao lower bound for Gaussian spreads.
1 citations