all-wave receiver 中文意思是什麼
all-wave receiver
解釋
全波段接收機-
All - wave receiver
全波受信機 -
Prestack migration method, based on wave motion equation, is also developed for receiver function, and compared with ray method. both p - to - s conversion wave and direct p phase contained in receiver function are migrated and imaged by reverse - time migration for data gather including all receiver functions recorded in all seismological stations for one event, and imaging profile is finally obtained by stacking for all events
本文還在接收函數射線反投影疊加成像的基礎上,提出了一種基於波動方程的接收函數疊前偏移成像方法,將同一事件接收函數中的轉換波和直達p波震相以各自的速度向深度方向逆時延拓成像,並通過不同慢度接收函數的疊加,得到最終的偏移成像結果。 -
The receiver works on active mode and passive mode in different time. in active mode, the receiver is narrow - band and high sensitive, and if phase - lock technology is used to stabilize receiving frequency. and in passive mode, the receiver is an all - power millimeter wave radiometer with periodic calibration to improve measure precision
此接收機採用分時工作體制,在主動工作方式時為窄帶的高靈敏度毫米波接收機,接收機中採用中頻鎖相技術,簡化了毫米波鎖相帶來的困難;在被動工作方式時為全功率型的毫米波輻射計,這種輻射計在每次測量后都採用兩個標準源對輻射計定標,實現周期定標,消除因系統增益波動和有效本機噪聲波動帶來的測量誤差,提高測量測量精度。 -
This thesis adopts 8psk / qpsk modulation mode that ' s widely applied in short - wave communication to research all - digital blind receiver in burst mode based on software radio technology. then related solutions are given for the doppler frequency shift problem and multiple fading problem in short - wave channels. the arrangement of the thesis is below : chapter 1 gives brief description for the new technology and new systems of short - wave communication and for the development and appliance of software radio
本文採用短波通信中應用廣泛的8psk qpsk調制方式,研究基於軟體無線電技術的突發模式全數字盲接收機,並對多音并行及慢速傳輸中存在的多譜勒大頻偏問題、單音串列、高速數傳時在短波通信鏈路中發生的干涉衰落問題做了研究,提出了相應的解決方案。 -
Chapter 2 introduces the key technology for all - digital receivers. chapter 3 gives a synchronization scheme for burst mode qpsk based on dpll using a certain preamble first, then a short - wave burst - mode 8psk all - digital blind receiver is proposed., all of the scheme is demonstrated in detail.,
全文結構安排如下:第一章為序論部分,介紹了當前短波通信中的新技術和新體制以及軟體無線電臺的概念、發展趨勢和相關應用;第二章介紹全數字接收機中的關鍵技術。
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