滾降頻率 的英文怎麼說
中文拼音 [gǔnjiàngbīnlǜ]
滾降頻率
英文
roll off frequency-
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 large c1 cap rolls off the gain of the regulator starting at a low frequency so that high frequency noise isn ' t amplified by the error amp
這個大的電容c1從一個較低的轉折頻率開始滾降,所以高頻噪音沒有被誤差放大器放大。Because msk phase is continuous, the rolloff velocity of the msk spectrum to the psk was improved greatly. on the other hand, if the channel ' s bandwidth is presented, the data transmission rate of msk is better than that of bpsk. 2
由於msk相位連續,它相對于psk頻譜的滾降速度有了很大的改善;另外在給定通道頻帶的時候,它比bpsk傳輸的數據速率高,每秒能傳輸更多的比特。
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