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- The earth's rotation and its motion around the sun add an appreciable frequency shift. 地球自轉與地球繞日公轉產生附加的頻移。
- According to the laser gain change is linear related to the frequency shift, the Doppler frequency is extracted by the signal processing. 根據激光的增益變化和頻率變化成線性關係,可以對信號進行處理求出多普勒頻移。
- The Brillouin frequency shift can be precisely measured by changing the local frequency and adopting narrow filter. 通過改變本地電信號的頻率對信號進行掃描和窄帶濾波,從而實現了布里淵頻移的精確測量。
- The scheme of measuring Brillouin frequency shift in fiber sensor based on edge optical filter is proposed. 提出了採用邊緣光濾波器來測量光纖感測中布里淵頻域的方案。
- The results show,the light frequency shift can be effectively r educed in the sharp angle laser light pumping scheme. 結果表明斜光抽運方案可以有效降低銫原子束頻標中的光頻移。
- This paper describes the design and the test results of Gaussian frequency shift keying for bluetooth. 介紹了一種用於藍牙晶元的高斯濾波移頻鍵控的設計和測試結果。
- Pilot beacon devices are available in the frequency shift and demodulation modes. 飛行員煙火裝置在頻度變化和解調模態中是可得的。
- Objective To discuss the effect of temperature on the frequency shift of piezoelectric quartz crystal biosensor. 目的探討溫度因素對壓電石英晶體感測器檢測頻率變化的影響。
- The Continuous Phase Frequency Shift Keying(CPFSK) signaling scheme has been widely used in mobile applications. 連續相位頻移鍵控(CPFSK)信號廣泛應用於攜帶型移動通信系統。
- Signal demodulation of automatic block with audio frequency shift modulated track circuits was implemented with phase-locked loop( PLL) technique and a singe chip microcomputer. 利用鎖相環(LL)窄帶跟蹤特性;與單片機結合;實現自動閉塞系統移頻信號解調.
- This is because that frequency shift can also be found in the wind vortex over the Arctic Ocean, U-wind in Beaufort Sea, V-wind in East Siberian Sea and the PDO index. 因此,除熱力因素外,動力因素引起的海冰的平流與該變頻現象也存在一定的聯繫。
- The raindrops approach speed is determined by the frequency shift, and provides a good estimation of the winds, which carry the raindrops. 透過這個頻率轉變,可導出雨點移近雷達的速度,從而替乘載這些雨點的風力提供了很好的估算。
- The frequency shift can simulate the emissive power of the base station very well and is good to the respiratory effect. 頻移可以很好地模擬基站發射功率,這對呼吸效應也有好處。
- Blind FRESH (frequency shift filter) can separate desired signals from spectrally over lapping interference by exploiting cyclostationarity. 摘要利用循環平穩特性可以進行信號提取,頻移濾波器對循環頻率誤差較為敏感。
- Then after amplitude limiting, to be preamplified, demodulated, bandpass filtered, the doppler frequency shift signal is extracted. 經過限幅保護,接收放大,檢波和帶通濾波后,將多普勒頻移信號提取出來。
- The principle and the design of quadrature-beamformer are discussed and the effect of the frequency shift on the beam axis is theoretically analyzed. 介紹了正交波束形成器的原理和設計方法,針對頻率偏移對波束主軸方向的影響進行了理論分析和討論,模擬結果驗證了理論分析的正確性。
- Frequency shift is a distinctive problem in InSAR system which is produced by the unique geometry of the system resulted from the effect of baseline. 摘要頻譜偏移理論是干涉合成孔徑雷達系統特有的一個很重要的問題,它是由基線的存在而導致的干涉合成孔徑雷達特有的幾何關係造成的。
- Massively uses the frequency Shift Keying Signal(FSK) in our country locomotive control signal to transmit each kind of locomotive speed information. 摘要 在我國機車控制信號中大量採用移頻鍵控信號(FSK)來傳送各種機車速度控制信息。
- Based on the discussion of the topological structure of a superheterodyne FM receiver, a one chip FM receiver for FSK(Frequency Shift Keying) signal has been designed. 在分析超外差 FM中頻接收拓撲結構的基礎上 ,設計出一種用於 FSK(移頻鍵控 )信號的單片FM中頻接收電路系統。
- The CRAs and CRVs morphological features of Doppler frequency shift spectrums were recorded and analyzed with DRG Doppler retinal flowmeter(10 Mhz probe). 方法:採用 DRG眼用多普勒血流儀,對正常成年人男女各 24名雙眼的 CRA、CRV多普勒頻譜圖象進行採集和形態分析。