本文提出一種以軟體數學模式透過電腦及通用串列匯流排(Universal Serial Bus，簡稱USB)到發展平台產生信號的電路設計方式。經由模擬、確認以可程式邏輯閘陣列(Field Programmable Gate Array，簡稱FPGA)來實現，並針對常用通信訊號實作來驗証設計的理念。 所設計的『軟體無線電任意基頻訊號產生器』 (The Signal Generator of Arbitrary Base Band of Software Defined Radio) 系統，不但使常用的通訊數學式子透過人機介面實現並且也可以將MATLAB模擬出來的訊號來產生實際的電波，本系統整個設計是藉由電腦產生波形數位碼(Waveform Code)，經高速通用串列匯流排(USB 2.0)介面，傳至可程式邏輯閘陣列(FPGA)發展平台做信號處理、再經由快速D/A(Digit to Analog Converter)來實現通信訊號，即可完成具有彈性設計『軟體無線電任意基頻訊號產生器』的發展平台。 This article proposes a method of generating signal circuit via USB( Universal Serial Bus), which simulated and verified by FPGA ( Filed Programmable Gate Array), and shows the implementation of several communication by this method. The software of signal generator of arbitrary base band can produce the electronic wave by man-machine interface with a common communication mathematics formula through the simulation of MATLAB. It’s accomplished by generating the waveform to FPGA via USB2.0, then producing the signal by D/A(Digit to Analog Converter). Then can finish designing the development platform of " The Signal Generator of Arbitrary Base Band of SDR(Software Defined Radio) " elastically.
