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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(chǎn)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(xiàn)性關(guān)系，可以對信號進(jìn)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(guò)改變本地電信號的頻率對信號進(jìn)行掃描和窄帶濾波，從而實(shí)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. 提出了采用邊緣光濾波器來(lái)測量光纖傳感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. 介紹了一種用于藍牙芯片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(tài)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傳感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)信號廣泛應用于便攜式移動(dòng)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(huán)(LL)窄帶跟蹤特性;與單片機結合;實(shí)現自動(dòng)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(dòng)力因素引起的海冰的平流與該變頻現象也存在一定的聯(lián)系。
- The raindrops approach speed is determined by the frequency shift, and provides a good estimation of the winds, which carry the raindrops. 透過(guò)這個(gè)頻率轉變,可導出雨點(diǎn)移近雷達的速度,從而替乘載這些雨點(diǎn)的風(fēng)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(fā)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(huán)平穩特性可以進(jìn)行信號提取，頻移濾波器對循環(huán)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(jīng)過(guò)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(lái)。
- 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(jìn)行了理論分析和討論,仿真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(gè)很重要的問(wèn)題，它是由基線(xiàn)的存在而導致的干涉合成孔徑雷達特有的幾何關(guān)系造成的。
- 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(chē)控制信號中大量采用移頻鍵控信號（FSK）來(lái)傳送各種機車(chē)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 ,設計出一種用于 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:采用 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(jìn)行采集和形態(tài)分析。
