Title :
Estimation of LEO satellite channels
Author :
Davis, Linda M. ; Collings, Iain B. ; Evans, Robin J.
Author_Institution :
Dept. of Electr. & Electron. Eng., Melbourne Univ., Parkville, Vic., Australia
Abstract :
In this paper, we propose a new channel estimation algorithm for low Earth orbit satellite digital communications. Low Earth orbit satellite channels impart severe spreading in delay and Doppler on the transmitted signal. We model the channel as a tapped-delay-line filter with time-varying complex coefficients. The time evolution of the taps is described by an auto-regressive model. A coupled filter using recursive prediction error methods is proposed for estimating the parameters of the channel. Its performance is demonstrated via simulations
Keywords :
FIR filters; autoregressive processes; delay lines; digital radio; error analysis; mobile satellite communication; prediction theory; recursive estimation; recursive filters; time-varying channels; Doppler; LEO satellite channel; auto-regressive model; channel estimation; coupled filter; delay; low Earth orbit satellite digital communications; performance; recursive prediction error; tapped-delay-line filter; time evolution; time-varying complex coefficients; Delay; Fading; Finite impulse response filter; Intersymbol interference; Low earth orbit satellites; Parameter estimation; Rayleigh channels; Recursive estimation; Satellite communication; Shadow mapping;
Conference_Titel :
Information, Communications and Signal Processing, 1997. ICICS., Proceedings of 1997 International Conference on
Print_ISBN :
0-7803-3676-3
DOI :
10.1109/ICICS.1997.647048
