DocumentCode :
297244
Title :
Slotted ALOHA mobile network with vertical array antenna diversity
Author :
Linnartz, Jean-Paul M G
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., California Univ., Berkeley, CA, USA
fYear :
1994
fDate :
28 Nov- 2 Dec 1994
Firstpage :
79
Abstract :
In mobile radio networks, receiver capture is known to enhance the performance of the slotted ALOHA random access protocol substantially. The efficiency of narrowband slotted ALOHA radio networks can be further enhanced by using sector antennas. The paper investigates the effect of partially overlapping, realistic antenna patterns which gives highly correlated received power levels at different receiver branches. The author proposes a method for computing the joint throughput from two base station antennas. The a posteriori information provided by the event of one message capturing one antenna is used to find conditional probabilities of capturing the other antennas. Any overlap in the antenna patterns decreases the throughput, but transmissions from the overlap area face a larger probability of capture than signals from directions in which only one antenna has significant gain
Keywords :
access protocols; antenna radiation patterns; channel capacity; dipole antenna arrays; diversity reception; land mobile radio; multi-access systems; probability; random processes; a posteriori information; base station antennas; conditional probabilities; message; narrowband slotted ALOHA radio networks; partially overlapping realistic antenna patterns; performance; random access protocol; received power levels; receiver capture; sector antennas; slotted ALOHA mobile network; throughput; vertical array antenna diversity; Access protocols; Antenna arrays; Directive antennas; Land mobile radio; Mobile antennas; Narrowband; Receivers; Slot antennas; Throughput; Transmitting antennas;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Global Telecommunications Conference, 1994. GLOBECOM '94. Communications: The Global Bridge., IEEE
Conference_Location :
San Francisco, CA
Print_ISBN :
0-7803-1820-X
Type :
conf
DOI :
10.1109/GLOCOM.1994.513312
Filename :
513312
Link To Document :
بازگشت