後第三代行動通訊前瞻性技術之研究(2/3)

本計畫的主要目的為探討第三代 行動通訊的前瞻性技術。主要研究項 目包括多輸入多輸出技術，脈衝無線 電技術，以及數種高速率傳輸技術傳 輸性能的比較。在多輸入多輸出技術 方面，為建立多輸入多輸出的通道量 測系統，分析多輸入多輸出的通道容 量，探討多輸入多輸出的通道估測法 則及寬頻多輸入多輸出的信號處理方 法。在脈衝無線電技術方面，為建立 脈衝無線電通道量測系統，並探討脈 衝無線電之多工擷取能力。在高速率 傳輸技術方面，則比較使用方向性天 線、等化器。OFDM，以及多輸入多輸 出等幾種不同方法在室內環境所能獲 致的最高傳輸速率與抗干擾特性。The purpose of this project is to investigate the advanced technology for B3G (beyond the third generation). The main research topics are: multiple input multiple output (MIMO) technique, impulse radio, and transmission performance comparison among several high rate transmission techniques. In MIMO, we have established the channel measurement system for MIMO, analyzed the channel capacity for MIMO, proposed channel estimation algorithms for MIMO, and studied the signal processing for wideband MIMO. In impulse radio, we have established the channel measurement system for impulse radio, investigated the multiple access capability and the narrowband interference resistance of an impulse radio system. In high rate transmission, we have compared the highest data rates that can be achieved by using different techniques such as directive antennas, equalizers, OFDM, MIMO, or combinations of the above techniques