第五代巨量天線徑分多重接取蜂巢式系統中使用交織碼調變之研究

Abstract

我們所提出的第五代巨量天線徑分多重接取蜂巢式系統是一個受干擾限制的系統。所有用戶使用相同的時槽和頻帶來傳輸數據。如同分碼多重進階系統一樣，訊號干擾比值是影響系統容量的主要原因。因此在數據傳輸中，使用可以容忍更多干擾的交織碼調變可以達到較好的系統容量。本篇論文介紹了交織碼調變的概念，並對使用幾種不同交織碼調變的系統性能進行了研究。此篇論文也介紹了我們系統中使用的上行和下行功率控制。透過在實際執行功率控制的情況下系統容量的模擬，我們展示了徑分多重接取蜂巢式系統在數據傳輸中使用交織碼調變所達到的系統容量增益。

Our proposed 5G massive antenna multipath division multiple access (MDMA) cellular system is an interference-limited system. All users use the same time slot and frequency band to transmit data; like CDMA system, the signal-to-interference ratio is a major impact on the system capacity. Hence, in data transmission, the use of trellis-coded modulation (TCM), which can tolerate more interference, can achieve better system capacity. In this thesis, the concept of TCM is introduced, and the performances of several kinds of TCM are investigated. Also, the uplink and downlink power control process used in our system are introduced. With actually implementation of power control process in our simulation, we show the system capacity gain of MDMA cellular system through using trellis-coded modulation in data transmission.