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Evaluation of forward‐link performance in cellular DS‐CDMA with Rayleigh fading and power control
Author(s) -
Oh S. W.,
Li K. H.
Publication year - 2001
Publication title -
international journal of communication systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.344
H-Index - 49
eISSN - 1099-1131
pISSN - 1074-5351
DOI - 10.1002/dac.452
Subject(s) - rayleigh fading , code division multiple access , computer science , power control , base station , rayleigh scattering , link (geometry) , power (physics) , cellular network , spread spectrum , fading , algorithm , telecommunications , topology (electrical circuits) , mathematics , computer network , channel (broadcasting) , physics , quantum mechanics , combinatorics , optics
In this paper, the exact probability density function (PDF) for mobile distance from its own base station is derived for computing the forward‐link performance of a Rayleigh‐faded direct‐sequence code‐division multiple‐access (DS‐CDMA) cellular system with power control. Comparison with the commonly used ‘circular‐cell approximation’ shows that the approximation gives more than 42 per cent of error in the calculation of the variance of the mobile distance for a typical power control exponent of 4. Results also show that the previous approximation could under‐estimate the forward‐link capacity by more than 30 per cent. Additionally, this newly derived PDF can also be used for arbitrary regular cell shapes by substituting their respective parameters. Copyright © 2001 John Wiley & Sons, Ltd.