Title :
On multipath clustering in angular domain and its impact on channel capacity and diversity gain
Author :
Zhao, Guangze ; Loyka, Sergey
Author_Institution :
Sch. of Inf. Technol. & Eng. (SITE), Univ. of Ottawa, Ottawa, ON
Abstract :
The effect of multipath clustering in angular domain and its impact on multi-antenna (MIMO) system performance (capacity, diversity gain) is studied in details. Fourier transform technique is a powerful tool that provides insight into the relationship between the angular spectrum (or angular probability density function(PDF)) of the incoming multipath and the antennas´ signal correlation. Compact closed-form expressions are derived and validated in the case of small angular spread in each cluster. Optimization problem is studied in terms of correlation and capacity/diversity gain. It is demonstrated that the capacity/diversity gain can be maximized by the antenna array orientation in such a way that individual cluster contributions to the correlations add in a destructive way. A new way to determine the angular PDF from measured data is suggested.
Keywords :
Fourier transforms; MIMO communication; antenna arrays; correlation methods; diversity reception; multipath channels; statistical distributions; Fourier transform technique; angular domain; antenna array; antennas signal correlation; channel capacity; diversity gain; multiantenna system; multipath clustering; optimization problem; probability density function; Antenna measurements; Antennas and propagation; Channel capacity; Closed-form solution; Delay effects; Diversity methods; Fourier transforms; Information technology; MIMO; System performance; MIMO system performance; Multipath propagation; fading correlation;
Conference_Titel :
Antennas and Propagation, 2006. EuCAP 2006. First European Conference on
Conference_Location :
Nice
Print_ISBN :
978-92-9092-937-6
DOI :
10.1109/EUCAP.2006.4584992
