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A space-time model for frequency nonselective Rayleigh fading channels with applications to space-time modems

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5 Author(s)
Tai-Ann Chen ; Dept. of Wireless Syst. Core Technol., Lucent Technol., Whippany, NJ, USA ; M. P. Fitz ; Wen-Yi Kuo ; M. D. Zoltowski
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This paper extends the traditional Clarke/Jakes (1968, 1974) model for a frequency flat fading process in a land mobile radio system to facilitate the examination of coherent space-time demodulation systems. The work develops a space-time correlation function using a ring of scatterers model around the mobile unit. The resulting correlation function permits the investigation of a variety of issues concerning base station configurations in space-time systems. The interrelationship of the fading process between the space and the time domain is explored. A detailed example regarding the effects of antenna separation in a receiver diversity system is considered. A set of design rules for interleaving depth and antenna separation in a space-time modem is presented and quantified.

Published in:

IEEE Journal on Selected Areas in Communications  (Volume:18 ,  Issue: 7 )