Open AccessStudy on application of CMA to land mobile LEO satellite communication systems based on a deterministic channel model
Author(s) -
Xu Chang Qing,
Law Choi Look,
Yoshida Susumu
Publication year - 2001
Publication title -
international journal of satellite communications
Language(s) - English
Resource type - Journals
eISSN - 1099-1247
pISSN - 0737-2884
DOI - 10.1002/sat.695
Subject(s) - fading , channel (broadcasting) , electronic engineering , computer science , antenna (radio) , beamforming , communications satellite , interference (communication) , satellite , adjacent channel interference , telecommunications , engineering , aerospace engineering
This paper studies the application of the constant modulus algorithm (CMA) in land mobile low earth orbit (LEO) satellite communication systems. Two propagation phenomena prevail in narrow band land mobile LEO satellite channel, namely, adjacent channel interference (ACI) and frequency‐non‐selective fading. The performance of CMA for ACI cancellation and the behaviours of CMA in frequency‐non‐selective fading channels are evaluated using a digital beamforming (DBF) array antenna simulation scheme. All these evaluations are based on a simple but efficient channel model which provides a good and fast simulation method for land mobile LEO satellite channels. The restricted Jakes Doppler power spectral density (psd) function is incorporated into the model to ensure that it will be appropriate for the evaluation of a DBF antenna. Our results reveal that CMA can reject ACI and work well in frequency‐non‐selective fading channels. Copyright © 2002 John Wiley & Sons, Ltd.