Title :
Effects of path loss and fringe user distribution on CDMA cellular frequency reuse efficiency
Author :
Rappaport, Theodore S. ; Milstein, Laurence B.
Author_Institution :
Dept. of Electr. Eng., Virginia Polytech. Inst. & State Univ., Blacksburg, VA, USA
Abstract :
Expressions that quantitatively describe the impact of path loss and user distribution on CDMA (code division multiple access) cellular radio system performance are determined. Path loss in typical microcellular and cellular channels is shown to increase exponentially with distance, to between the second and third power, as opposed to the commonly quoted fourth power law. Two performance measures, frequency reuse efficiency and bit error rate probability, are evaluated for CDMA cellular systems. Values for frequency reuse efficiency are derived for the uplink using different propagation rules and spatial distributions of subscribers in adjacent cells. Bit error rate probabilities are found as a function of the number of users for a two-cell downlink model that assumes the subscriber is straddling the cell boundaries
Keywords :
cellular radio; code division multiple access; error statistics; radiowave propagation; CDMA; bit error rate probability; cell boundaries; cellular channels; cellular radio; code division multiple access; frequency reuse efficiency; fringe user distribution; microcellular channels; path loss; propagation rules; radiowave propagation; spatial distributions; two-cell downlink model; Base stations; Bit error rate; Downlink; Electromagnetic propagation; Frequency; Land mobile radio cellular systems; Microwave communication; Multiaccess communication; Propagation losses; Radio transmitters;
Conference_Titel :
Global Telecommunications Conference, 1990, and Exhibition. 'Communications: Connecting the Future', GLOBECOM '90., IEEE
Conference_Location :
San Diego, CA
Print_ISBN :
0-87942-632-2
DOI :
10.1109/GLOCOM.1990.116562
