IEEE 802.15.3c多重載波高速介面系統之空間多重擷取

Abstract

IEEE 802.15.3c為一在短距離傳送未經壓縮的高解析視訊、音訊及資料之規格。由於使用位於免執照的60GHz頻帶，因此在此頻帶中將遭受到嚴重的傳播損耗(propagation loss)。為了解決這項問題，利用平面天線陣列(planar antenna array)及波束形成技術(beamforming)是一個經常使用來補償遺失的方法。在本論文中，我們首先設計了IEEE802.15.3c之正交頻分複用技術(OFDM)接收器，並利用平面天線陣列實現空間分割多重存取(SDMA)，進而模擬IEEE802.15.3c之無線個人區域網路(PAN)。在SDMA中，各個方向之波束是同時產生的，然而各個波束之間所形成之干擾成為我們主要關心的問題。最近，一種結合數位權重與相位偏移器的混合式的天線陣列被提出來。利用這樣的架構之下，可有效的消除波束之間的干擾。我們利用多重輸入多重輸出(MIMO)系統來模擬SDMA系統，並計算比較SDMA使用類比波束形成(analog beamforming)與數位波束形成(digital beamforming)在IEEE802.15.3c之下的效能。

IEEE 802.15.3c is a high data-rate specification proposed to transfer uncompressed high-definition video, audio, and data in short distance. Since it operates in unlicensed 60GHz band, it endures a severe propagation loss. To solve the problem, a planar antenna array conducting beamforming is usually needed to compensate for the loss. In this thesis, we first design an OFDM receiver for the IEEE802.15.3c system. Then, we take advantage of the antenna array to propose a spatial division multiple access (SDMA) system for IEEE802.15.3c personal area network (PAN). In SDMA, multiple beams are formed simultaneously, and interference between these beams becomes the main concern. Recently, a hybrid array, which can conduct beamforming using digital weights and phase shifters, was proposed. With the architecture, interference cancellation becomes possible. We model a SDMA system with a multiple-input-multiple output (MIMO) system and evaluate the performance of an IEEE 802.15.3c SDMA system with analog and hybrid beamforming.