- 作者: 吳中實; 鍾禎洸; 楊裕全
- 作者服務機構: 國立中興大學電機工程學系; 中華電信研究所
- 中文摘要: 二階層巨微細胞式分碼多工系統已為時勢所趨。然而巨微細胞間同頻干擾有別於同質細胞間之干擾。本論文探討能提昇系統容量之各種機制,其中上下鏈功率控制均包括在內。我們評估系統效能參數,諸如阻塞機率,訊擾比值,容量與服務空洞區。模擬結果顯示,有效的功率控制確能增加巨微細胞的容量。
- 英文摘要: Combining macrocell and microcell by a two-tier overlaying and underlaying structure for code-division multiple access (CDMA) systems is becoming a popular trend in the near future.However, thecochannel interference between microcell and macrocell in a two-tier structure is different from that inthe homogeneous structure. This paper investigates the schemes to enhance the capacity of system. Thepower control schemes for both the uplink and downlink are also considered. We obtain performancemeasures, such as the blocking probability, C/I, capacity and service hole area, by means of computersimulation. The results show that the capacity of the macrocell and microcell can be significantly increasedif appropriate power control schemes are adopted.
- 中文關鍵字: CDMA; power control; uplink/downlink; capacity
- 英文關鍵字: --