國立臺灣大學電機工程學系暨研究所闕志達2006-07-252018-07-062006-07-252018-07-062000-07-31http://ntur.lib.ntu.edu.tw//handle/246246/7827本文主要提出一個基於3GPP 所提出並由 ITU IMT-2000 標準所接受的建議書中的寬 頻 CDMA (Wideband CDMA, W-CDMA) 系統標準的上傳基頻收發機架構設計及硬 體FPGA 仿真驗證,此架構中並含有 RAKE 接收機及波束合成器以增加系統接 收能力。寬頻CDMA 之所以成為下一代行 動通訊的關鍵技術,主要是提供了目前所 不能兼顧的行動力和互動性,大幅增加使 用者的移動性和傳送資料的頻寬。在此架 構中,波束合成器利用波束搜尋器所得出 的空間特徵,將由四組天線進入的輸入信 號合併,由此可獲得6 dB 在空間變化上的 增益。另外在路徑變化上的增益可藉由 RAKE 接收機收集由多路徑而來的信號, 再加上由通道估計器所得到的參數,進行 最佳比例合成後得到。為了要測試所提出 架構的可行性,無向量及向量通道均在所 測試的模擬中使用。系統模擬結果顯示, 本論文中提出的架構除了可以達到標準中 的基本要求外,在不大幅增加系統的複雜 度下,波束合成器更可大幅提昇接收的效 能,例如在抗拒多使用者雜訊上。This paper presents the architecture design, FPGA implementation and test results of an uplink baseband transceiver for W-CDMA systems. The architecture is designed based on 3GPP Radio Access Network FDD mode specification. In addition, advance techniques such as beamforming and RAKE receiving are adopted. The beamformer uses spatial signature calculated by the beam searcher to combine input signals from four antennas and therefore a spatial diversity gain is introduced. A path diversity is provided by the RAKE receiver, which gathers four multi-path signals with the weights obtained from the channel estimator for maximum ratio combining. Scalar channel and vector channel models are both used in the simulation to verify the design. Both simulation and hardware emulation results show that the proposed architecture can indeed meet the specified requirement, and the advanced techniques, such as beamformer, really provide an enhancement in reception.application/pdf1281991 bytesapplication/pdfzh-TW國立臺灣大學電機工程學系暨研究所收發機W-CDMARAKEbeamformingsmart antennatransceivers具有智慧型天線的寬頻CDMA 基地站收發機之研製– 寬頻CDMA 收發機中即時基頻信號模組之研製Design and Implementation of Transceiver for Wideband CDMA base station with Smar t Antenna – Design and Design and Implementation of Real-time Baseband Signal Processor in Wideband CDMA Transceiverreporthttp://ntur.lib.ntu.edu.tw/bitstream/246246/7827/1/892219E002019.pdf