Title :
Effect of circular-cell approximation on the forward-link BER performance of a power-controlled CDMA system
Author :
Oh, Ser W. ; Li, Kwok H.
Author_Institution :
Sch. of Electr. & Electron. Eng., Nanyang Technol. Inst., Singapore
Abstract :
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% 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%. Additionally, this newly derived PDF can also be used for arbitrary regular cell shapes by substituting their respective parameters.
Keywords :
Rayleigh channels; approximation theory; cellular radio; code division multiple access; error statistics; multiuser channels; power control; probability; radio links; spread spectrum communication; telecommunication control; DS-CDMA cellular system; Rayleigh fading; base station; circular-cell approximation; direct-sequence code-division multiple-access; exact PDF; forward-link BER performance; forward-link capacity; mobile distance; power control exponent; power-controlled CDMA system; probability density function; regular cell shapes; Base stations; Bit error rate; Error correction; Mobile computing; Multiaccess communication; Power control; Power engineering computing; Power generation; Probability density function; Shape control;
Conference_Titel :
Global Telecommunications Conference, 1999. GLOBECOM '99
Print_ISBN :
0-7803-5796-5
DOI :
10.1109/GLOCOM.1999.831746
