signal down-converted 中文意思是什麼
signal down-converted
解釋
下轉換信號-
When the cur - cuit resets, the chip remains accepting state, works in burst mode, and adopts dpsk modulation mode. it proceeds quadrature - sampled intermediate frequency signal after the ad9057 has converted, then down - converses, despreads and demodulates. the demodulated baseband signal will be sended into scm to dispose through interrupt
上電復位后，晶元處于接收狀態，工作在突發模式下，採用dpsk調制方式，將ad9057轉換完的中頻信號進行復正交取樣後下變頻、解擴、解調，通過中斷將解調完的基帶信號送入單片機處理；處于發送狀態時，可將數據擴頻、調制，經ad9768送出。 -
The digital if signal is converted to zero if by digital down converter, then taken fft spectrum analysis with hann window in advance
數字中頻信號首先通過數字混頻下變頻至零中頻，然後作加海窗的復fft譜分析。 -
Analyze, design and simulate the digital down - convert frequency. first, the analogue if signal is converted to digital if signal in one a / d convertor which used passband sampling theory. the digital if signal is then passed to a pair of digital mixers operating in phase quadrature for mixing the if signal to baseband signal
首先利用帶通采樣定理對中頻模擬信號進行a / d變換后將其混頻到基帶，然後用平方根升餘弦滾降濾波器同時完成低通濾波和匹配濾波雙重作用，以提高解調器的效率。 -
The signal of colloidal - gold strips are converted from light into electricity and then processed, modeled by computer. in the end the risk rate of down ' s syndrome can be got by calculating with the software of prenatal screen for down ' s syndrome
該測試系統對金標試條測試信號進行光電轉換、信號處理和計算機建模，最後通過篩查軟體得出被測孕婦懷有唐氏綜合征胎兒的風險率。
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