Keseimbangan pautan atas dan pautan bawah dalam sistem WCDMA

Katiran, Norshidah (2004) Keseimbangan pautan atas dan pautan bawah dalam sistem WCDMA. Masters thesis, Universiti Kebangsaan Malaysia.

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Abstract

In WCDMA system, uplink ( UL ) and downlink (DL) have different channel propagation characteristics. Base station ( BS ) and mobile station ( MS ) require different target bit-energy per noise ratio ( EblNo ), transmitting powers and loading factor. Therefore, the path loss for UL and DL does not match and rather unbalanced. The difference in path loss between UL and DL results in unnecessary interference to MSs in other cells. If too much transmitting power of MS is used for UL, the soft capacity degraded. In WCDMA system, CPICH ( Common Pilot Channel ) is the reference to other common channels from the transmitting power's viewpoint. In this study, link balance between UL and DL is analyzed. Transmitting power of CPICH is manipulated for link balance between UL and DL. Then, transmitting power of CPICH and BS can be estimated. The model used in this study is a WCDMA system where various service bearers are mixed. In addition, DL loading factor ( YJDL )and link perf0I111anCe are investigated. Simulations are perf0I111ed using MATLAB Version 6.5.1 software. Simulation results show that transmitting power of CPICH, TCH and BS increase as the number of MS in the serving cell increases. Transmitting power of CPICH, TCH and BS decrease as the cells size increase.

Item Type:Thesis (Masters)
Subjects:T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK5101-5865 Telecommunication. Telegraph.
ID Code:1138
Deposited By:Norfauzan Md Sarwin
Deposited On:19 Apr 2011 15:23
Last Modified:29 Apr 2011 14:43

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