quadrature carrier 中文意思是什麼

quadrature carrier 解釋
正交載子
  • quadrature : n. 1. 【數學】求積分,求面積。2. 【天文學】矩;(月的)上[下]弦;方照。3. 【物理學】正交;轉象差;九十度相位差。
  • carrier : n 1 運送人,搬夫;負荷者;使役,〈美國〉信差,郵遞員;送報人;〈英國〉運輸行,運輸業者。2 傳書鴿...
  1. This dissertation adopts a universal digital ds / dmpsk modulation and demodulation scheme which is based on fpga. this scheme adopts quadrature balanceable modulation, intermediate frequency sampling, digital matched filtering, delay differential demodulation techniques and so on. it directly processes the digital signals on intermediate frequency without down - conversion, and doesn ’ t need pseudo random codes synchronization and carrier wave extraction circuits

    本文採用了一種基於fpga的通用數字調制解調方案,該方案在調制端採用了正交平衡調制技術,在解調端採用了中頻帶通采樣、數字匹配濾波、延時差分解調等技術,直接在中頻上進行數字信號處理,不需要進行下變頻,也不需要增加額外的偽隨機碼同步捕獲和載波提取電路。
  2. After comparing several analog and digital generation methods of lfm signal, this paper confirms the system scheme as direct digital synthesis plus quadrature modulation. combined with agilent arbitrary waveform generator and phasor signal generator, a generation system is established and a ultra - wideband signal, whose bandwidth is 1ghz and carrier frequency is 4ghz, is generated

    通過對幾種模擬與數字線性調頻信號的產生方法的比較,本文採用了以直接數字波形合成( ddws )加正交調制的系統方案,並結合實際的儀器設備,產生了帶寬為1ghz ,載頻4ghz的超寬帶線性調頻信號。
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