Title :
Channel characterisation for spread spectrum satellite communications
Author :
Jahn, Axel ; Bischl, Hermann ; Heiß, Günter
Author_Institution :
Inst. for Commun. Technol., DLR, Wessling, Germany
Abstract :
The paper examines the characteristics of satellite propagation channels for spread spectrum communications. Based on measurement campaigns at L-band, the signal bandwidth is determined when the channel becomes frequency-selective. A wideband channel model for land mobile satellite (LMS) services is presented which characterises the time-varying transmission channel between a satellite and a mobile user terminal. The parameters of the model are the results of fitting procedures applied to the measured data. The parameters are given for various environments and elevation angles. For satellite diversity, the correlation of two independent channels is determined. This channel property is applicable to wideband and narrowband channel models
Keywords :
UHF measurement; UHF radio propagation; correlation methods; diversity reception; land mobile radio; mobile satellite communication; spread spectrum communication; time-varying channels; L-band measurement; channel characterisation; elevation angles; frequency selective channel; independent channels correlation; land mobile satellite services; measured data; mobile user terminal; model parameters; narrowband channel models; satellite diversity; satellite propagation channels; signal bandwidth; spread spectrum satellite communications; time-varying transmission channel; wideband channel model; Bandwidth; Delay; Extraterrestrial measurements; Frequency; Least squares approximation; Narrowband; Satellite broadcasting; Satellite communication; Spread spectrum communication; Wideband;
Conference_Titel :
Spread Spectrum Techniques and Applications Proceedings, 1996., IEEE 4th International Symposium on
Conference_Location :
Mainz
Print_ISBN :
0-7803-3567-8
DOI :
10.1109/ISSSTA.1996.563500
