coherent carrier 中文意思是什麼
coherent carrier
解釋
相干載波-
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。 -
According to the proposal, two millimeter - wave phase locked sources are locked on a crystal oscillator. the one of the phase locked source is used for steady carrier wave in transmitter, the other is used for local oscillator. through the proposal, coherent transceiver front - end is achieved
本方案採用同一晶振源為收發兩個毫米波鎖相源作參考頻率，其中的一個鎖相源用於產生高穩定的發射載波頻率，另一個用於產生高穩定的本振信號，從而實現收發的相參性。 -
First, we analysize the performance of coherent and noncoherent dlls, then we give an implementation scheme of dll and a design method of carrier tracking loop. the design methods and a implemention scheme of a fir shaping filter is proposed in the fifth part
首先分析了相干和非相干延遲鎖定環的性能，接著給出了一種dll跟蹤環路的實現方案和一種載波跟蹤環路的設計方法。第五部分介紹了一種fir成型濾波器的設計和實現方法。 -
And their performances are compared by simulation. the realization of phase - coherent modulation is studied, especially the carrier recovery. in order to improve the system performance, we consider a receiver which performs optimal phase synchronization and channel equalization jointly
本文詳盡的研究了線性和非線性自適應均衡器的橫向結構和典型演算法（ lms和rls ） ，對其性能進行了模擬比較；對相位相干調制解調技術的實現，尤其是載波恢復的方法進行研究，將載波恢復系統和自適應均衡器的參數調整聯合起來，從而提高相干水聲通信系統的性能。 -
Project and error analysis about one way and single frequency non - coherent carrier wave velocity measurement
單程單頻非相干載波測速方案及測速誤差分析 -
It need n ' t to distill coherent carrier and there is no trouble such as phase faintness, loop hit etc. the packaged wave of n / 4dqpsk is comparatively tiny, which is appropriate to the mobile communication
/ 4dqpsk信號包絡起伏相對較小，比較適合移動通信。此外，它可以採用差分解調，也可以採用相干解調的方式。 -
Based on the coherent reception theory of radio signals and the theory of digital signal processing, the effects of carrier frequency offset, sampling clock offset, and symbol timing offset on ofdm signals are exploited. a series of amendments and new algorithms is derived from the in being algorithms of guard interval based symbol timing and frequency offset estimation, frequency - domain frequency offset, sampling offset, and symbol timing offset estimation
以無線信號的相干接收和數字信號處理理論為基礎，就載波頻偏、采樣鐘偏差和符號定時偏差對ofdm信號的影響進行了分析，對基於保護間隔的符號定時與載波頻偏估計演算法和多種現有頻偏、采樣鐘與符號定時偏差的頻域估計演算法進行了研究，提出了一系列改進措施與新演算法。 -
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。 -
Coherent reference carrier
相干基準載波
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