短波發信機 的英文怎麼說
中文拼音 [duǎnbōfāxìnjī]
短波發信機
英文
short-wave transmitter-
With the objective of developing distributed simulation system of frequency hopping ultrashort communication countermeasure system, the federation architecture and the complex envelop simulation block diagrams of fr transmitter and receiver are presented at first
摘要以建立超短波跳頻通信對抗分散式模擬系統為目的，首先給出了聯邦的體系結構及跳頻發信機、接收機成員的復包絡模擬框圖。Short - wave communication is the most important scheme in military communication. with the fast development of various new technology and new systems, such as dsp technology, micro processing technology, frequency - hopping technology, error correction technology, short - wave communication has already been widely applied in military communication, marine communication, board communication and so on
短波通信是現代軍事通信中最重要的通信手段，隨著隨著數字信號處理（ dsp ）技術、微處理技術，自適應技術、跳頻技術，糾錯技術，分集技術等各種新技術和新體制的飛速發展，短波通信已廣泛應用在軍事通信、海上通信、機載通信等各方面。Based on the different work states of engine, the engine vibration signal collected in it ' s steady work conditions is analysed by the technique of confrequency spectrum ; the signal related to the fast run - up state is processed by stft and wavelet analysis
根據發動機的工作特點，將振動信號分為穩態振動信號和過渡態振動信號。穩態信號採用傳統的傅立葉分析方法，過渡態信號採用了短時傅立葉變換和小波方法。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。分享友人