Title :
Experimental characterization of the MIMO wireless channel: data acquisition and analysis
Author :
Wallace, JonW ; Jensen, Michael A. ; Swindlehurst, A. Lee ; Jeffs, Brian D.
Author_Institution :
Dept. of Electr. & Comput. Eng., Brigham Young Univ., Provo, UT, USA
fDate :
3/1/2003 12:00:00 AM
Abstract :
Detailed performance assessment of space-time coding algorithms in realistic channels is critically dependent upon accurate knowledge of the wireless channel spatial characteristics. This paper presents an experimental measurement platform capable of providing the narrowband channel transfer matrix for wireless communications scenarios. The system is used to directly measure key multiple-input-multiple-output parameters in an indoor environment at 2.45 GHz. Linear antenna arrays of different sizes and construction with up to ten elements at transmit and receive are utilized in the measurement campaign. This data is analyzed to reveal channel properties such as transfer matrix element statistical distributions and temporal and spatial correlation. Additionally, the impact of parameters such as antenna element polarization, directivity, and array size on channel capacity are highlighted. The paper concludes with a discussion of the relationship between multipath richness and path loss, as well as their joint role in determining channel capacity.
Keywords :
MIMO systems; UHF radio propagation; channel capacity; channel estimation; data acquisition; electromagnetic wave polarisation; indoor radio; linear antenna arrays; matrix algebra; multiuser channels; receiving antennas; space-time codes; transmitting antennas; 2.45 GHz; MIMO wireless channel; UHF; antenna directivity; antenna element polarization; array size; channel capacity; channel estimation; channel properties; data acquisition; data analysis; experimental measurement platform; indoor environment; linear antenna arrays; matrix PDF; narrowband channel transfer matrix; path loss; receive antenna array; space-time coding algorithms; spatial correlation; statistical distributions; temporal correlation; transfer matrix element; transmit antenna array; wireless channel spatial characteristics; wireless communications; Antenna measurements; Channel capacity; Data acquisition; Data analysis; Indoor environments; Linear antenna arrays; MIMO; Narrowband; Receiving antennas; Wireless communication;
Journal_Title :
Wireless Communications, IEEE Transactions on
DOI :
10.1109/TWC.2003.808975