Title :
A real time downlink channel allocation scheme for an SDMA mobile radio system
Author :
Farsakh, Christof ; Nossek, Josef A.
Author_Institution :
Inst. of Network Theory & Circuit Design, Tech. Univ. Munchen, Germany
Abstract :
In SDMA mobile radio systems where only base stations, but no mobiles are equipped with antenna arrays, co-channel interference on the downlink has to be kept down by beamforming. The performance of the beamformer is determined by the directions of arrival (DOAs) of the users operating in the same frequency/time/code slot. Thus the full capacity of an SDMA cell can only be made use of by an effective channel allocation scheme. In this paper, a real time concept for channel allocation is presented. Furthermore, several criteria to quickly evaluate the spatial separability of subsets of users, were defined and then compared to each other by means of simulations
Keywords :
array signal processing; cellular radio; channel capacity; cochannel interference; direction-of-arrival estimation; frequency allocation; land mobile radio; multi-access systems; radio spectrum management; radiofrequency interference; space division multiplexing; DOA; SDMA; beamforming; cellular radio; co-channel interference; direction of arrival; downlink channel allocation; mobile radio system; real time concept; spatial separability; subsets of users; Antenna arrays; Array signal processing; Base stations; Channel allocation; Downlink; Frequency; Interchannel interference; Land mobile radio; Mobile antennas; Multiaccess communication;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 1996. PIMRC'96., Seventh IEEE International Symposium on
Conference_Location :
Taipei
Print_ISBN :
0-7803-3692-5
DOI :
10.1109/PIMRC.1996.568477
