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Doppler spectrum of the multipath fading channel in mobile satellite systems with directional terminal antennas

Doppler spectrum of the multipath fading channel in mobile satellite systems with directional terminal antennas

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© The Institution of Engineering and Technology
Published

A new approach for determining the Doppler spectrum of narrowband multipath channels by assuming a three-dimensional propagation model is proposed. The new derivation methodology is first applied to determine the Doppler spectrum of a Rayleigh channel, when an omni-directional mobile–terminal antenna is assumed. The obtained results are shown to agree with the existing analytical results, which are available for particular assumptions regarding the angular distribution of the received multipath power. The main contribution is the derivation of the Doppler spectrum of the mobile satellite channel, where directive tracking terminal antennas are assumed. The results, which are dependent on the antenna's beamwidth and bearing, apply to emerging types of commercial vehicular satellite systems.

Inspec keywords: tracking; directive antennas; mobile satellite communication; Rayleigh channels; multipath channels; mobile antennas

Other keywords: omnidirectional mobile-terminal antenna; angular distribution; vehicular satellite system; Rayleigh channel; three-dimensional propagation model; Doppler spectrum; mobile satellite systems; narrowband multipath fading channel; directional tracking terminal antennas

Subjects: Satellite communication systems; Single antennas; Mobile radio systems

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