Capacity of Orthogonalized Weibull MIMO Channels Under Different Adaptive Transmission Techniques

Authors:
Hai-Lin Xiao;Shan Ouyang;Zai-Ping Nie;Feng Zhao
Affiliations:
School of Information and Communications, Guilin University of Electronic Technology, Guilin, People's Republic of China 541004;School of Information and Communications, Guilin University of Electronic Technology, Guilin, People's Republic of China 541004;School of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu, People's Republic of China 610054;School of Information and Communications, Guilin University of Electronic Technology, Guilin, People's Republic of China 541004
Venue:
Wireless Personal Communications: An International Journal
Year:
2010

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Abstract

Space-time block codes (STBCs) are known to orthogonalize the multiple input multiple out (MIMO) wireless channels. In this paper, we study the capacity of STBCs over Weibull MIMO channels under three adaptive transmission techniques: optimal power and rate adaptation, optimal rate adaptation with constant transmit power and channel inversion with fixed rate, and obtain closed-form expressions for the corresponding capacity. This capacity provides an upper bound on spectral efficiency using these techniques and avoids Monte Carlo simulations. Moreover, we also examine the effects of the fading severity on the concerned quantities. The figures show that our theoretical results of channel capacity line up exactly with the simulations.