改良式3GPP無線電空時通道模擬器之建構與應用

Abstract

本論文以3GPP無線電通道模型為基準，分別針對其系統層通道模型及連接層通道模型二個部分加以改良，建構可反應真實環境之通道模擬器。其中利用統計實際環境之多重路徑生成與消失率，計算實際環境之多重路徑變化率，以此變化率增加了系統層模型中多重路徑抵達角度之時變特性。並藉由量測實際環境之通道脈衝響應，建構可供第三代通訊系統做連接層模擬所需之通道模型資料庫，以增加3GPP連接層通道模型之選擇性，完成了改良式3GPP無線電空-時通道模擬器。並建構寬頻分碼多工存取系統，分析系統在此改良式3GPP通道模擬器下之效能及影響。

In this thesis, a channel simulator has been developed with the aim to present the channel models based on the 3GPP radio channel model, which contains the system-level and link-level, and to describe the methods to modify the channel models. Applying the birth rate and death rate of the multipath in the realistic environment, the system-level channel model is improved by extending the time-variant characteristic of the AOA of the multipath. The database of the channel model is established by measuring the impulse response of the different environments. Thus the selection of the link-level channel models is increased. Finally, the performance of the WCDMA system in the modified simulator is also evaluated. The simulator aims at being used as a simulation platform for 3G wireless communication systems.