Estimating Jakes' Doppler power spectrum parameters using the whittle approximation

Penalized multivariate Whittle likelihood for power spectrum estimation

Nonparametric estimation procedures that can flexibly account for varying levels of smoothness among different functional parameters, such as penalized likelihoods, have been developed in a variety of settings. However, geometric constraints on power spectra have limited the development of such methods when estimating the power spectrum of a vector-valued time series. This article introduces a ...

Spectrum Channel Characterization Using Delay and Doppler Spread Parameters

Abstract—This paper describes a non-blind technique, channel sounder, to characterize a wireless channel. This technique is based on the transmission of a pseudo random sequence through the channel, the calculation of its autocorrelation to estimate the channel impulse response, and from it the calculation of the Delay and Doppler spread parameters. This channel sounder was implemented using GN...

Design Algorithms for Doppler MTI and Filters (Using Chebyshev Approximation)

Design Algorithms for Doppler MTI and Filters (Using Chebyshev Approximation)

On Estimating the Qso Transmission Power Spectrum

The Lyman-alpha forest has become an important tool for measuring the mass power spectrum at high redshifts (z = 2−4). A crucial intermediate step is the measurement of the transmission power spectrum. We present new methods to minimize the systematic and random errors for such a measurement, and discuss their implications for observing strategies. Sources of systematic errors explored include ...