Title :
Downlink performance of adaptive antennas with null broadening
Author :
Hugl, Klaus ; Laurila, Juha ; Bonek, Ernst
Author_Institution :
Inst. fur Nachrichtentech. und Hochfrequenztech., Tech. Univ. Wien, Austria
Abstract :
We compare different null broadening schemes and their ability to decrease the radiated interference for the co-channel users in a space division multiple access system with adaptive antennas. By link level simulations of the GSM 1800 system in urban and suburban environments we show that a gain of up to 8 dB in SNIR is feasible with null broadening. Therefore adequate null broadening seems to be a must in the downlink beamforming process
Keywords :
adaptive antenna arrays; array signal processing; cellular radio; cochannel interference; direction-of-arrival estimation; interference suppression; space division multiple access; GSM 1800 system; SNIR; adaptive antennas; cellular radio; co-channel users; downlink beamforming; link level simulations; null broadening; radiated interference; space division multiple access system; suburban environment; urban environment; Adaptive arrays; Antenna measurements; Array signal processing; Base stations; Direction of arrival estimation; Downlink; Frequency conversion; Interference; Receiving antennas; Time division multiple access;
Conference_Titel :
Vehicular Technology Conference, 1999 IEEE 49th
Conference_Location :
Houston, TX
Print_ISBN :
0-7803-5565-2
DOI :
10.1109/VETEC.1999.778333
