Title :
On the effect of directional antennas on the reverse link capacity of CDMA cellular systems
Author :
Uc-Ríos, Carlos E. ; Lara-Rodríguez, Domingo
Author_Institution :
Electr. Eng. Dept., CINVESTAV-IPN, San Pedro Zacatenco, Mexico
fDate :
6/23/1905 12:00:00 AM
Abstract :
The effects of antenna sectorization on the reverse link capacity of cellular CDMA systems is studied. Traditionally, the effects of ideal antenna sectorization have been considered as a multiplication factor of the same value as the number of sectors introduced. Our contribution is to study the effect of real antenna patterns on the capacity of CDMA cellular systems. First, the other cell interference is evaluated analytically for different path loss exponents and standard deviation of the lognormal shadowing losses. Soft handoff and softer handoff were considered. Then, the effect of this corrected factor on the capacity of the system is studied. It is shown that, for a three sectored antenna system, the gain in capacity in comparison to an omnidirectional antenna system is 2.39 for real antenna patterns and typical propagation parameters.
Keywords :
antenna radiation patterns; cellular radio; code division multiple access; directive antennas; radiofrequency interference; receiving antennas; statistical analysis; CDMA cellular systems; antenna sectorization; cell interference; directional antennas; lognormal shadowing losses; path loss exponents; propagation parameters; real antenna patterns; reverse link capacity; soft handoff; standard deviation; Antennas and propagation; Base stations; Directional antennas; Directive antennas; Fading; Interference; Multiaccess communication; Power control; Propagation losses; Shadow mapping;
Conference_Titel :
Vehicular Technology Conference, 2001. VTC 2001 Fall. IEEE VTS 54th
Print_ISBN :
0-7803-7005-8
DOI :
10.1109/VTC.2001.956589
