Title :
Capacity improvement in CDMA and FDMA cellular mobile communication systems using adaptive antennas
Author :
Sawant, Anand S. ; Anvekar, Dinesh K.
Author_Institution :
Dept. of Electr. Commun. Eng., Indian Inst. of Sci., Bangalore, India
Abstract :
A simulation study of the possibility of capacity improvement in multi-cell CDMA and FDMA cellular systems by using adaptive antennas at the base stations is presented. Phased arrays that form steerable, fixed-pattern, narrow beams towards the users, have been assumed to approximate the performance of the adaptive antennas in a multipath-free environment. Simulation results for BER improvements in CDMA systems by assuming only distance-dependent path loss are given. Further improvements by considering the voice activity factor are also presented. Then, simulation results for improvements in the outage probability in CDMA and FDMA systems and degradation caused by power control errors assuming distance-dependent path loss and log-normal shadowing are presented
Keywords :
adaptive antenna arrays; antenna phased arrays; cellular radio; channel capacity; code division multiple access; error statistics; frequency division multiple access; log normal distribution; BER; CDMA; FDMA; adaptive antennas; approximation; base stations; capacity improvement; cellular mobile communication systems; distance-dependent path loss; fixed-pattern narrow beams; log-normal shadowing; multipath-free environment; outage probability; phased arrays; power control errors; simulation study; steerable narrow beams; voice activity factor; Adaptive arrays; Adaptive systems; Antenna arrays; Base stations; Bit error rate; Degradation; Frequency division multiaccess; Mobile communication; Multiaccess communication; Phased arrays;
Conference_Titel :
Personal Wireless Communication, 1999 IEEE International Conference on
Conference_Location :
Jaipur
Print_ISBN :
0-7803-4912-1
DOI :
10.1109/ICPWC.1999.759588
