Title :
On estimating the RMS delay spread from the frequency-domain level crossing rate
Author_Institution :
Dept. of Electr. Eng., Delft Univ. of Technol., Netherlands
fDate :
7/1/2001 12:00:00 AM
Abstract :
It is shown that the level crossing rate (LCR) of a Rayleigh distributed stochastic process is proportional to the second centralized moment of the normalized power spectrum of the underlying complex Gaussian process. This proportionality factor is independent of the power spectrum. The relation can be applied for estimating the RMS delay spread of time-dispersive (frequency-selective) radio channels from swept-frequency power measurements, where the RMS delay spread is proportional to the LCR in the frequency-domain, independent of the channel impulse response.
Keywords :
Gaussian processes; Rayleigh channels; delay estimation; dispersive channels; frequency-domain analysis; radiocommunication; spectral analysis; RMS delay spread estimation; Rayleigh distributed stochastic process; approximations; channel impulse response; complex Gaussian process; frequency-domain level crossing rate; frequency-selective radio channels; normalized power spectrum; proportionality factor; second centralized moment; swept-frequency power measurements; time-dispersive radio channels; Delay estimation; Equations; Frequency domain analysis; Frequency estimation; Gaussian processes; Mathematical model; Power measurement; Rayleigh channels; Root mean square; Stochastic processes;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/4234.935744
