tdm frequency 中文意思是什麼
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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。 -
A algorithm of frequency estimation for tdm channel of inmarsat system
通道中心頻率估計演算法 -
High technology is applied to gsm, such as fdma, tdm a, and frequency hopping. many logical channels related to different services and the mapping of logical channels to physical channels are defined
Gsm系統綜合運用了頻分多址（ fdma ）技術，加上時分多址（ tdma ）技術，並輔以跳頻技術。
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