Title :
A Dual Logarithm Model for Estimation of WCDMA Downlink Pole Capacity in Multipath Propagation Channel and Verification with Measurements in Live Node B Sites
Author :
Chen, Y.H. ; Wang, Y.C. ; Lai, C.L.
Author_Institution :
Oriental Inst. of Technol., Taipei
Abstract :
A new and precise dual logarithm model are derived to estimate WCDMA downlink pole capacity in the local multipath propagation channel and verified with measurements from several live Node B sites. Model estimations show excellent consistence with measured data. As well, cell-breathing phenomenon has been detected. In estimating the Downlink pole capacity of WCDMA radio network, we propose a new algorithm to calculate orthogonality factor for different spreading codes and derive a dual logarithm equation for the orthogonality factor with respect to the data bit rate. With that equation, an exact solution of the downlink pole capacity for an isolated cell or a cluster of cells can be estimated when loading distribution for all services are assigned and the downlink interference ratio is calculated as well.
Keywords :
broadband networks; code division multiple access; multipath channels; radio links; radiowave propagation; WCDMA downlink pole capacity estimation; cell-breathing phenomenon; downlink interference ratio; dual logarithm equation; dual logarithm model; local multipath propagation channel; orthogonality factor; Bit rate; Clustering algorithms; Differential equations; Downlink; Interference; Multiaccess communication; Propagation delay; Radio network; Throughput; Video sharing; Cell Breathing; Downlink Pole Capacity; Interference Ratio; Multipath Propagation; Orthogonality; Spreading Factor;
Conference_Titel :
Instrumentation and Measurement Technology Conference Proceedings, 2007. IMTC 2007. IEEE
Conference_Location :
Warsaw
Print_ISBN :
1-4244-0588-2
DOI :
10.1109/IMTC.2007.379455
