Title :
Adaptive base station antennas with additional switching element for SDMA systems
Author :
Cho, Keizo ; Nishimori, Kentaro ; Takatori, Yasushi ; Hori, Toshikazu
Author_Institution :
NTT Network Innovation Labs., Nippon Telegraph & Telephone Corp., Japan
Abstract :
This paper proposes a new adaptive base-station antenna configuration employing an additional switching element that reduces that influence of grating lobes caused by wide inter-element spacing. The influence of fading, the angle spread of incoming waves, and inter-element spacing of the array on the proposed antenna performance is investigated by computer simulation. The output signal-to-interference and noise ratio (SINR) of the proposed antenna compared to the conventional adaptive antenna employing an equilateral triangular array shows a maximum 5-dB improvement when applying the proposed antenna to two-user space division multiple access (SDMA) systems
Keywords :
adaptive antenna arrays; antenna accessories; antenna radiation patterns; fading; land mobile radio; space division multiple access; SDMA systems; adaptive base station antennas; additional switching element; angle spread; antenna performance; fading; grating lobes; incoming wave; inter-element spacing; noise ratio; signal-to-interference ratio; two-user space division multiple access; Adaptive arrays; Antenna arrays; Base stations; Fading; Gratings; Hardware; Multiaccess communication; Radio transmitters; Receiving antennas; Signal to noise ratio;
Conference_Titel :
Vehicular Technology Conference, 1999. VTC 1999 - Fall. IEEE VTS 50th
Conference_Location :
Amsterdam
Print_ISBN :
0-7803-5435-4
DOI :
10.1109/VETECF.1999.801733
