coherent demodulation 中文意思是什麼

coherent demodulation 解釋
相干解調
  • coherent : adj. 1. 緊密地結合著的；凝聚性的。2. （話等）有條理的，首尾一貫的；一致的。3. 【光學】相干的，相參的。
  • demodulation : n. 【無線電】解調，反調制；檢波。
  1. Non - coherent demodulation of bpsk signal based on time measuring

    信號非相干解調方法
  2. The coherent demodulation and adaptive demodulation are both realized in these forementioned systems in system view, and the corresponding theory is proved by analyzing and comparing in simulation

    在systemview中模擬實現了上述信號的相干解調和自適應解調兩種方法，並模擬通信的實際環境分析對比解調性能，驗證前述的理論分析。
  3. Firstly, on the base of analyzing psk ' s theory and audio - card ' s constitute and data transfers, bdpsk and qdpsk soft - modulation and soft - demodulation systems based on audio - card are studied and implemented, including generating digital carrier sequence, synchronizing carrier, designing filter, sampling and judging, etc. the system adopts coherent demodulation method, synchronizing carrier adopts costas loop

    本文首先分析了調相信號調制解調的基本理論和多媒體計算機（ mpc ）聲卡組成原理及數據傳輸等方面的內容，然後研究並實現了基於計算機聲卡的bdpsk和qdpsk信號軟體調制解調系統，內容包括數字載波序列的產生、載波同步、濾波器設計，信號的抽樣判決等。
  4. The conclusion is identified by computer simulation. the paper studies a noncoherent demodulation based on differential encoding in mc - cdma system and makes computer simulation of ber performance compared with that of coherent demodulation based on perfect channel estimation

    研究分析了一種使用差分編碼的非相干接收mc - cdma系統，對頻率選擇性瑞利衰落通道條件下的誤碼率性能進行了計算機模擬，並且和基於理想通道估計的相干解調方案進行了比較。
  5. Through some research in depth on soct, this thesis proposes a scheme of star - type vsat ( very small aperture terminal ) network based on overlap back transmission, and do some research on key techniques involved with the scheme and their partial realization with fpga ( field programmable gate array ), such as spread spectrum techniques, a non - coherent de - spreading spectrum and demodulation technique and adaptive interference cancel

    本文在深入研究衛星重疊通信技術的基礎上，提出了一種基於重疊回傳的星形vsat網方案。並在衛星重疊通信涉及的幾種關鍵技術及其部分核心器件的fpga實現等方面進行了一些研究，包括：擴頻技術、非相干解擴解調技術、自適應干擾抵消技術等，並將它們用於基於重疊回傳的星形vsat網方案。
  6. However, the high demand in frequency domain involves precise synchronization both in time and frequency domain. while because of the different channel characteristics in each channel, the receiver needs some mechanisms to characterize the channel effects in coherent demodulation

    然而，頻域的高要求對應于同步技術的高要求；另外，各個子通道不同的通道特徵，要求接收端相關解調用一定的機制來近似每個子通道的通道特徵。
  7. Following this, the thesis research digital demodulation of qpsk and analyze the digitalizing means of key module. digitalizing demodulation arithmetic is given. the thesis also researched in phase ambiguity of coherent demodulation, and then brings forward a new method for settling phase ambiguity

    而後研究了qpsk的數字化解調，分析了關鍵模塊的數字化方法，給出了數字化解調演算法，並研究了相干解調中的相位模糊問題，提出了一種解決相位模糊的新方法。
  8. Second, this paper design the simulation scheme of bicm for comparing the performance over fading channel and awgn channel that combine 2 / 3 rate, 4 states punctured convolutional code with 8psk modulation, matching block interleave or random interleave, transform through rayleigh channel or awgn channel and use the way that combine coherent demodulation with viterbi decoding in receiver. design the scheme of bicm _ id that use the iterative decoding technique and the scheme of tcm for compare

    為了驗證bicm和bicm _ id在衰落通道和加性高斯白噪聲通道（ awgn ）下的性能，設計了一個2 / 3碼率， 4狀態的鑿孔卷積碼經過塊交織或隨機交織，與8psk調制相結合，在rayleigh通道下或awgn通道下傳輸，接收端採用相干解調與維特比譯碼相結合的bicm方案，在接收端引入迭代反饋譯碼的bicm _ id方案，以及與之相比較的tcm方案。
  9. The main results and creative points in the dissertation were as follows : a ) by means of studying on the fiber - optic hydrophones ’ tdm array based on phase generated carrier ( pgc ) demodulation with laser frequency modulation, the mathematic models were set up, used for theoretical analyses of noncoherent crosstalks in the system using low coherent laser and coherent crosstalks in the system using high coherent laser. the formulas calculating crosstalks were given, and the method measuring crosstalks was shown definitely

    本論文的主要研究結果和創新在於: 1 、通過對基於光頻調制pgc （相位生成載波）解調光纖水聽器時分復用系統的研究，針對低相干光源的串擾強度迭加和高相干光源串擾的相干迭加，建立了理論分析的數學模型，得出了計算串擾的公式，明確了測試系統串擾的方法。
  10. The double - channel perpendicular coherent decomposing experimental device adopts the synchronous demodulation, by analyzing and processing the signals, separating useful hardness signals from multiple disturbances

    本系統中的雙通道正交分解試驗裝置利用同步檢波技術，通過對信號的分析與處理，從眾多的干擾信號中提取出待檢測的硬度信號。
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