Title :
On Mutual Information and Capacity in Frequency Selective Wireless Channels
Author :
Rupp, Markus ; García-Naya, José A. ; Mehlführer, Christian ; Caban, Sebastian ; Castedo, Luis
Author_Institution :
Inst. of Commun. & Radio-Freq. Eng., Vienna Univ. of Technol., Vienna, Austria
Abstract :
This paper has two major contributions. First, we present measured frequency selective wireless channels and show that there is only a small difference between mutual information and capacity. For single-antenna channels the maximum difference is about 0.15 bit/s/Hz, but typical differences are much smaller. These differences are increased with the number of transmit and receive antennas, achieving a maximum of about 0.4 bit/s/Hz for 2x2 MIMO channels and about 1.8 bit/s/Hz for 4x4 MIMO channels. The second contribution is a simple two-parameter channel model for frequency selective wireless channels, exhibiting the identical behavior in terms of capacity and mutual information than the measured channels. Due to its simplicity, this so-called poor-rich model is especially suitable for fast simulations and for analytical research in the field of information theory.
Keywords :
Analytical models; Antenna measurements; Frequency measurement; Information analysis; MIMO; Mutual information; Radio spectrum management; Signal to noise ratio; Throughput; Transmitters;
Conference_Titel :
Communications (ICC), 2010 IEEE International Conference on
Conference_Location :
Cape Town, South Africa
Print_ISBN :
978-1-4244-6402-9
DOI :
10.1109/ICC.2010.5501942