Title :
Optimal multiplexing gain of K-user line-of-sight interference channels with polarization
Author :
Chae, Sung Ho ; Choi, Sang Won ; Chung, Sae-Young
Author_Institution :
Sch. of EECS, KAIST, Daejeon, South Korea
fDate :
Sept. 30 2009-Oct. 2 2009
Abstract :
We consider the multiplexing gain (MUXG) of the fully connected i¿i¿-user line-of-sight (LOS) interference channels (ICs). A polarimetric antenna composed of 3 orthogonal electric dipoles and 3 orthogonal magnetic dipoles is considered where all 6 dipoles are co-located. In case of K-user IC with single polarization, the maximum achievable MUXG is K regardless of the number of transmit and receive antennas because of the key-hole effect. With polarization, a trivial upper bound on the MUXG is 2K. We propose a zero forcing (ZF) scheme for the i¿i¿-user LOS IC, where each user uses one or more polarimetric antennas. By using the proposed ZF scheme, we find minimal antenna configurations that achieve this bound for K ¿ 5. For K > 5, we show that the optimal MUXG of 2K is achieved with M = [K + 1/6] polarimetric antennas at each user.
Keywords :
antenna accessories; antenna radiation patterns; channel allocation; channel capacity; interference suppression; K-user line-of-sight interference channels; optimal multiplexing gain; orthogonal electric dipoles; orthogonal magnetic dipoles; polarimetric antenna; polarization; zero forcing scheme; Dipole antennas; Geometry; Interference channels; MIMO; Polarization; Radio spectrum management; Receiving antennas; Resource management; Scattering; Upper bound;
Conference_Titel :
Communication, Control, and Computing, 2009. Allerton 2009. 47th Annual Allerton Conference on
Conference_Location :
Monticello, IL
Print_ISBN :
978-1-4244-5870-7
DOI :
10.1109/ALLERTON.2009.5394813