提升收發機隔離度之主動射頻洩漏消除方法

專利類型

發明

專利國別 (專利申請國家)

中華民國

專利申請案號

109141113

專利證號

I 769593

專利獲證名稱

提升收發機隔離度之主動射頻洩漏消除方法

專利所屬機關 (申請機關)

元智大學

獲證日期

2022/07/01

技術說明

中文: 本研究針對主動射頻消除提升收發機隔離度，因發射端經過頻率選擇性射頻雙工器(Duplexer)或循環器(Circulator)等射頻元件時，如果內部隔離效果不佳，導致傳送的信號部分將洩漏至接收迴路，造成接收端接收信號被洩漏信號覆蓋影響接收機性能之問題，因此採用輔助路徑設計主動射頻消除技術，抑制主路徑洩漏干擾的信號。研究可行之主動射頻消除濾波器之寬頻響應參數估計與補償技術及調校程序。然而，在此主動射頻消除系統中，將分成發射端射頻完美與發射端射頻不完美時，使用不同的架構與演算法消除洩漏訊號，並實現傳輸多種不同的單載波與多載波等測試信號。為達上述目的，本研究先利用MATLAB建置一套全數位軟體模擬平台仿真寬頻射頻完美與寬頻射頻不完美時之主動射頻消除場景及所設計之估測與補償技術，初步驗證調校法則之可行性。接續，使用商用AD9371寬頻射頻模組當作發射端並搭配Mini-Circuit (ZFRSC-42-S+)合成器、PA (QPA9421)放大器、Circulator (TH102M3-100)循環器、LNA (ABL0600-01-3040DP)低雜訊放大器以及NI PXIe-5646R寬頻儀器平台為完美的接收端，整合上述軟體模擬平台之主動射頻消除濾波器之寬頻響應參數估計與補償技術，實現於實際測試平台中進行主動射頻消除發射端洩漏之干擾訊號之目的。整合上述，本研究之設計流程，結合理論、模擬、儀器、模組、實務測試完成克服寬頻射頻完美及不完美因子之主動射頻消除技術達寬頻高品質通訊之需求。英文: This research aims to study the active RF cancellation for the improved isolation of transceiver. When the transmitting signals are passed through radio frequency components such as duplexer or circulator with the internal isolation imperfect, the part of the transmitting signals will leak into the receiving loop. It will cause the receiving signals at the receiver side to be covered by the leaking signal and affect the performance of the receiver. Therefore, the auxiliary path designed by active RF cancellation technology is used to suppress the signal of the main path leakage interference. Next, we will explore the useful active RF cancellation filter with calibration procedures to estimate wideband response and cancel the leakage interference. However, in this active RF cancellation system, when the transmitter RF with perfect and imperfect scenarios are studied, the different architectures and algorithms are proposed to eliminate the leakage signal and realize the transmission of a variety of different single-carrier and multi-carrier test signals. In order to achieve the above objectives, the research firstly develops all digital software platform to simulate active RF cancellation scenarios with the wideband RF being perfect and imperfection. Then, we design the RF parameters estimation and the leakage compensation technology. Moreover, it can be verified by the feasibility of the calibration rule. Thus, for hardware calibration design, the commercial AD9371 wideband RF module with Mini-Circuit (ZFRSC-42-S+) combiner, Power amplifier (PA) (QPA9421), and Circulator (TH102M3-100) circulator is designed by transmitter. Then, low noise amplifier (LNA) (ABL0600-01-3040DP) and the NI PXIe-5646R platform are designed by receiver. Next, the NI PXIe-5646R wideband instrument platform is used for the perfect receive signal. Furthermore, the hardware platform to integrate the above-mentioned software simulation platform can achieve the purpose of eliminating the interference signal leaked from the transmitter. To sum up, the above proposed design flows can combine the theory, simulation, instrument, RF module, and the practical measurements to overcome the active RF cancellation technology when wideband RF perfect and imperfections and to achieve the requirement of the wideband high equality communications.

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