Title :
CDMA wireless local loop capacity
Author :
Lee, David J Y ; Xu, Ce
Author_Institution :
AirTouch Commun. Inc., Walnut Creek, CA, USA
Abstract :
A wireless local loop (WLL) system has many inherent advantages over traditional cellular system, such as bigger coverage area, low power, reduced interference, higher capacity, no fast fading, no hand-off, etc. In this paper ideal multiple-tier hexagonal cells are used to derive the capacity of a CDMA WLL system. First, the reverse link interference from each tier to the center cell is calculated separately, Then, interference ratio of reverse links in a WLL system is analytically derived as a function of total tier number. The result shows that interference from other cells is proportional to the beam width of the house antenna. We also found that tier number plays a vital role in system capacity in a free-space propagation (20 dB/dec) environment. A WLL simulator is also built to verify our analytical solution
Keywords :
cellular radio; channel capacity; code division multiple access; fading; land mobile radio; radiofrequency interference; subscriber loops; CDMA wireless local loop capacity; WLL simulator; WLL system; analytical solution; beam width; capacity; cellular system; coverage area; fading; free-space propagation environment; house antenna; interference ratio; low power; multiple-tier hexagonal cells; reduced interference; reverse link interference; system capacity; total tier number; Analytical models; Antennas and propagation; Costs; Equations; Fading; Frequency division multiaccess; Interference; Multiaccess communication; Telephony; Wire;
Conference_Titel :
Global Telecommunications Conference, 1997. GLOBECOM '97., IEEE
Conference_Location :
Phoenix, AZ
Print_ISBN :
0-7803-4198-8
DOI :
10.1109/GLOCOM.1997.632520
