Title :
Estimation of capacity and required transmission power of WCDMA downlink based on a downlink pole equation
Author :
Sipilä, Kari ; Honkasalo, Zhi-Chun ; Laiho-Steffens, Jaana ; Wacker, Achim
Author_Institution :
Nokia Natworks, Nokia Group, Finland
Abstract :
A simple method is derived for estimating the downlink capacity and required base station transmission power in a WCDMA system. This is based on a downlink pole equation which is mostly similar with the well known CDMA uplink pole equation. It is shown that the total downlink transmission power is composed of two terms. The first term is equal to what would be needed in the absence of interference and the second one shows the increase due to multiple access interference which is inversely proportional to 1-ηDL where ηDL is called the downlink loading. The method can be used in radio network dimensioning where extensive simulations can not be run. Usage of the method is demonstrated by some examples
Keywords :
broadband networks; cellular radio; channel capacity; code division multiple access; multiuser channels; radio links; radio networks; radiofrequency interference; WCDMA downlink; base station transmission power; cellular radio; downlink capacity estimation; downlink loading; downlink pole equation; multiple access interference; radio network dimensioning; simulations; total downlink transmission power; transmission power; Base stations; Bit rate; Downlink; Equations; Multiaccess communication; Multiple access interference; Power amplifiers; Propagation losses; Radio network; Stability;
Conference_Titel :
Vehicular Technology Conference Proceedings, 2000. VTC 2000-Spring Tokyo. 2000 IEEE 51st
Conference_Location :
Tokyo
Print_ISBN :
0-7803-5718-3
DOI :
10.1109/VETECS.2000.851275
