| 摘要: | 本文除了實現一單向傳輸模組，經由實測至少60km的有效傳輸，驗證此模組在空間中的性能與衰逝趨勢。包含了無線電單向傳輸系統設計： 數位調變模組的電路、單向傳輸通訊協定韌體、 PC端人機介面軟體、測試平台機構的組裝，實際量測的結果與分析。 並且規劃將此單向傳輸模組，改良為效能更佳的半雙工通訊模組：增加並整合路徑切換單元電路，半雙工傳輸通訊協定韌體、更高發射能量放大器、與接收能量放大器。 最後以單向傳輸模組的實測擬合曲線，建立此通訊模組的性能參數，用以預測新開發之半雙工系統在更高發射能量和接收性能下，所能有效通訊的極限傳輸距離。 In this work, a unidirectional transmission radio module, which can transfer at least 60 km, is proved by experiments, and the properties and the trend of decay of this module are also proved. The design of this unidirectional transmission radio includes circuits of digital modulation, unidirectional transmission protocol software, software of Human Computer Interaction, test platform of mechanical assembly, and experiment data analysis. Moreover, in order to improve this unidirectional transmission radio module into more efficient Half-Duplex Transmission, these are several methods are applied in this research, such as, increasing and integrating route switching circuit, and using the route switching circuit protocol software, more powerful power amplifier, and low noise amplifier. Finally, by using the fitted curve of the unidirectional transmission radio module, the parameters in this module are built. According to these results, the efficient transfer distant of this novel Half-Duplex Transmission with powerful emitting and receiving can be predicted. |
