Title :
Optimum beamforming for co-channel interference nulling in mobile satellite communications
Author :
Zooghby, A.H.E. ; Christodoulou, C.G.
Author_Institution :
Dept. of Electr. & Comput. Eng., Central Florida Univ., Orlando, FL, USA
Abstract :
The problem of increasing the number of users in FDMA mobile satellite communication systems is addressed. An antenna array is used to estimate the angle of arrival (AOA) of desired and cochannel mobile users then the same array is used to allocate the maximum of the pattern to desired users while co-channel interference is nulled. This paper describes the use of the MUSIC algorithm for the DOA estimation. Pattern nulls are obtained using the Wiener solution for the optimum array weights. It is shown that this approach allows closer proximity of the mobile users with the same frequency thus increasing the channel capacity.
Keywords :
antenna radiation patterns; array signal processing; channel capacity; cochannel interference; direction-of-arrival estimation; frequency division multiple access; interference suppression; mobile satellite communication; AOA estimation; DOA estimation; FDMA mobile satellite communication systems; MUSIC algorithm; Wiener solution; angle of arrival; channel capacity; cochannel interference nulling; cochannel mobile users; optimum array weights; optimum beamforming; Antenna arrays; Array signal processing; Bandwidth; Eigenvalues and eigenfunctions; Frequency division multiaccess; Interchannel interference; Multiple signal classification; Radio spectrum management; Satellite communication; Signal resolution;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1996. AP-S. Digest
Print_ISBN :
0-7803-3216-4
DOI :
10.1109/APS.1996.549652
