國立臺灣大學電信工程學研究所李學智2006-07-262018-07-052006-07-262018-07-052005-07-31http://ntur.lib.ntu.edu.tw//handle/246246/20331無線區域網路因其所在頻段無需使用執照，且 較行動通訊成本低、傳輸率高的優勢，於近二年來 蓬勃發展。然而隨著無線多媒體影音及遊戲等應用 的風行，無線區域網路所使用的2.4 GHz 及5 GHz 頻段已逐漸有擁塞、不敷使用的現象。追根究底， 其原因除了現有頻段不夠容納高品質的多媒體需 求外，介質存取控制協定效率低也是主要原因之 一。本計畫研究在具有極大可用頻寬的60 GHz 頻 段設置無線區域網路的可行性，並設計及製作可用 於此頻段的無線收發機。60 GHz 頻段的波長短、 極有利於多天線的設置，因此使用多輸入多輸出天 線來倍增傳輸率也是本計畫的重點。整體而言，一 個無線區域網路的效能取決於其所使用的通道環 境、實體層的演算法、收發機及天線的製作、以及 介質存取控制協定的效率，本計畫藉由下列三個子 計畫同時考慮這些因素，以完成一個初步但完整的 寬頻無線區域網路設計。 子計畫一：60 GHz WLAN 通道特性的量測、數據 分析與系統模擬(李學智教授主持) 子計畫二：高速多天線分頻正交多工通信基頻收發 機之設計與製作(闕志達教授主持) 子計畫三：高速多天線分頻正交多工無線區域網路 的整合介質存取控制及實體層設計(蘇 炫榮教授主持) 本年度為本總計畫執行之第一年度，本篇報告 將總結各個子計畫在本年度之研究成果。Wireless LAN has enjoyed a growing popularity in the past two years due to its unlicensed, low-cost and high-rate nature compared to cellular networks. This success has triggered a change in the end-user demand toward high quality, rate-hungry multimedia applications such as wireless high definition digital videos and games. As a result, the current 2.4 GHz and 5 GHz wireless LAN bands are becoming inadequate to fulfill the demand, partly due to insufficient bandwidth, but also due to the inefficient MAC protocols that are being used in the current wireless LAN. In view of this, in this group project, we investigate the possibility of deploying wireless LANs with wideband transmission in the 60 GHz band where ample unlicensed bandwidth is available. In addition, as the short wavelength at 60 GHz implies both compact multiple-antenna deployment and high spatial diversity within a small area, we also consider MIMO transmission techniques as a wireless LAN depends on the characteristics of the channel it is being applied to, the physical layer transceiver design, antenna design, and the MAC protocols. As such, this group project relies on the following three projects to cover all these performance-defining factors, in order to gain preliminary but comprehensive insights into the design of a wideband wireless LAN. Subproject 1: WLAN Channel Characteristics Measurement, Analysis, and Simulation at 60GHz Subproject 2: High Speed Baseband Multi-Antenna OFDM Transceiver Design and Implementation Subproject 3: Integrated MAC and Physical Layer Design for a High Speed Multi-Antenna OFDM WLAN This is the first year of the group project, and this report summarizes the research outcomes of each subproject in this year.application/pdf44090 bytesapplication/pdfzh-TW國立臺灣大學電信工程學研究所無線區域網路60 GHz正交分頻多工調變多輸入多輸出通道收發機智慧型天線多重性介質存取控制WLAN60GHzOFDMMIMOTransceiverSmart AntennaDiversityMACreporthttp://ntur.lib.ntu.edu.tw/bitstream/246246/20331/1/932219E002012.pdf