carrier band 中文意思是什麼

carrier band 解釋
載波頻帶
  • carrier : n 1 運送人，搬夫；負荷者；使役，〈美國〉信差，郵遞員；送報人；〈英國〉運輸行，運輸業者。2 傳書鴿...
  • band : n 1 帶，繩；帶形物；箍；箍條；嵌條；鑲邊；鋸條； 〈pl 〉 （法官等的）寬領帶。2 束縛，羈絆；義務；...
  1. With the continuous developments of modern radar technology and anti - electronic technology, the electromagnetic environment hade become more complicated, the transmitted signal ' s carrier frequency had become higher, frequency band occupation had become wider, the form of the signal had become more concealment

    數字信號處理相對于模擬信號處理的優越性主要表現在精度高、靈活性強、可靠性好、易於大規模集成及存儲等，所以正受到工程界越來越多的關注。
  2. One missense mutation was found in 48 hypertriglyceridemic patients and identified to be pro207 - leu by sequencing, pedigree analysis of this proband has been carried out and showed that the pro band ' s father is also a carrier of this mutation

    徵得患者家屬的同意和支持，對其家族三代十人進行了完整的家系分析。家系分析顯示，先證者的突變來自其父親的遺傳。在外顯子6 、 7 、 8中未檢出基因突變。
  3. The carrier wave is modulated directly by the baseband signal at several frequency point in l band and s band. firstly, this paper clarifies the theory of i / q modulation, elaborates evm and acpl, and analyzes the effect of amplitude and phase unbalance and dc offset on evm. secondly we review the basic principle of phase locked loop and it ’ s composing parts, including the basic conception and design method of pll frequency synthesizer, especially introduce the charge pump pll frequency synthesizer in detail

    首先，在闡述i / q正交調制基本原理的基礎上，通過對誤差矢量和鄰近通道功率泄漏的詳細分析，定性、定量地討論了各種非理想電路因素（如相位不平衡、幅度不平衡、直流偏差等）對調制器性能的影響;其次，介紹了鎖相環的工作原理和基本組成部分，包括鎖相環的設計和環路濾波器的設計，特別詳述了電荷泵鎖相頻率源;第三，介紹了採用直接調制技術模擬衛星信號的射頻前端的設計;最後，對整個直接射頻調制系統進行測試，結果基本上達到了課題要求。
  4. Chapter 3 treats the algorithm implementation of demodulator in the receiving asic of dvb - s. in detail, demodulation includes carrier recovery and symbol synchronization. together with the transmission characterization of band - limited input signals the chapter proposes a scheme for implementing carrier recovery loop

    解調具體分為載波恢復、時鐘同步兩大部分，本章著重論述了載波恢復的原理並結合dvb - s輸入信號傳輸特性，提出了相應的實現方案，對部分電路進行了性能分析。
  5. Grading standard for quality of carrier telephone equipment. open wire high band 3 - channel carrier telephon equipment

    載波電話設備質量分等標準.明線高頻3路載波電話設備
  6. Grading standard for quality of carrier telephone equipment. open wire high band 12 channel carrier telephone equipment

    載波電話設備質量分等標準.明線高12路載波電話設備
  7. Parallel structure of poly - phase decomposition and parallel mixer is applied in the ddc circuit, it solves the bottleneck in mixing and increases the handle speed. the partition of the tuning channel according to the digital mixing sequence, and the ddc by means of decimating first, the low - pass filtering and mixing realize efficiently the down - conversion of the variable carrier frequency band - pass signal. according to the structure of the ddc and the requirement of the frequency

    短數據快速測頻演算法的具體實現:使用并行流水線的設計方法，提高了系統的數據吞吐率，在100mhz的系統時鐘下，能夠實時處理400mhz ~ 600mhz速率a / d采樣的數據，在64點采樣， 100mhz系統時鐘情況下，初次測頻佔用時間640ns ，以後每次測頻佔用時間縮短到160ns ，實時地提供多相濾波下變頻所需的載頻位置信息，縮短了接收機的調諧時間。
  8. Filter poly - phase decomposition method is adopted in this dissertation. the partition of the tuning channel according to the digital mixing sequence, and the digital down - conversion by means of decimating first, the low - pass filtering and mixing realize efficiently the down - conversion of the variable carrier frequency band - pass signal

    本文採用濾波器多相分解方法，按數字混頻序列劃分調諧通道，使用先抽取，后低通濾波，再混頻的數字下變頻結構，高效實現了變載頻帶通信號數字下變頻。
  9. With the carrier gas flux rising, the film ' s thickness and the degree of crystallization increase. the band gap decreased little, and the photocatalysed efficiency was enhanced

    隨著載氣流量的增加，薄膜的厚度增加，結晶性能提高，光學帶隙變窄，光催化效率增加，親水性沒有明顯變化。
  10. 7. based on the comparison with dual band gps phase and c / acode, ambiguity function method, least squares search, ambiguity solution covariance, cholesky disintegrate and least square ambiguity decorrelation adjustment, it is considered the method of ambiguity function using double gps antennas to move baseline and the equation of dual differential carrier phase

    在分析雙頻p碼偽距法、模糊度函數法、最小二乘搜索法、模糊度協方差法、 cholesky分解法、和lambda演算法的基礎上，重點研究基於雙gps天線動一動基線載波相位雙差整周模糊度確定方法。
  11. To the solution of how to further shenzhen " s development of hi - tech industry, i point out in my thesis as follows, to accelerate the strategy of relying on science and education to develop the city ; to develop electronic information technology, biological technology and new material technology, with hi - tech industry band as carrier and highlighting invention of system, technology and management ; to build some key hi - tech enterprises and well - known products ; to promote industrial upgrading ; to informationize with strength ; to attract elites ; to protect copy right ; to keep an eye on the risk of investment ; to better the investment environment ; to make shenzhen the base of production and exportation of hi - tech product, the base of hi - tech research and development, the base of transformation and transaction of its outcome, as well as the base of fostering hi - tech elites ; to try to make shenzhen a hi - tech city with clear scale advantage, outstanding industrial features, creation and investment in full bloom, lots of hi - tech elites and pleasant environment

    對深圳如何進一步發展高新技術產業的對策問題，我在論文中提出：加武漢理工大學碩士學位論文快實施科教興市戰略，以高新技術產業帶為主要載體，突出體制創新、技術創新和管理創新，重點發展電子信息、生物技術和新材料技術，培育一批高新技術骨幹企業和名牌產品，用高新技術改造和提升傳統產業，推動產業升級，加強信息化建設，吸引創業人才，保護知識產權，防範投資風險，優化創業環境，使深圳成為重要的高新技術產品生產和出口基地，高新技術研發和成果轉化、交易基地，以及高新技術人才培養基地，努力把深圳建設成為規模優勢明顯、產業特色突出、創新體系完善、創業投資活躍、科技人才薈萃、綜合環境優良的高科技城市。
  12. The imaging algorithm provides a new choice for wide band imaging. according to the sar radar performance such as resolution, the choice and requirement for radar system parameters are discussed in the chapter 4. specially the precision requirement of velocity, acceleration, and the roll, pitch angle and altitude of radar carrier provided by ins is deduced in detail

    本文第四章從合成孔徑雷達所需要的解析度等設計指標出發，具體分析了合成孔徑雷達的主要設計參數的選擇與要求，特別對慣導系統提供的速度、加速度、姿態角和載機高度等測量精度要求進行了詳盡的分析。
  13. On the basis of the former research works, we present the detecting method as follows : for the narrow band characteristic of the track signal we use under - sampling instead of nyquist sampling to reduce the sampling rate. as to the carrier frequency, the spectrum of the 18 - information frequency - shift track signal has two peaks, then the carrier frequency is the average of the two peak frequency, to um - 71 jointless track signal, it has only one peak, then the carrier frequency is the peak frequency

    針對移頻軌道信號的窄帶特性提出了使用欠采樣技術代替奈奎斯特采樣的方法，以降低信號的采樣頻率;國產18信息移頻軌道信號頻譜具有雙峰，雙峰頻率平均值就是信號的載頻頻率，而um - 71無絕緣軌道信號頻譜單峰，峰值頻率即為信號的載頻頻率。
  14. Except, the error model of orthogonal modulation and double frequency technology were studied. third, the design and implementation of ultra wide band lfm generator were studied. an ultra wide band lfm pulse compression signal generator with 400mhz carrier and 300mhz absolute bandwidth was developed successful

    ?第三部分在理論分析的基礎上對超寬帶lfm信號源系統的設計和實現技術進行研究，成功研製出了中心頻率為400mhz ，帶寬為300mhz ，重復頻率為1khz ，脈寬為20 s的線性調頻信號。
  15. Under the best grading way, the shape of the band profile is more propitious to the transfer of the carrier

    漸變長度較長時，線性漸變是最佳漸變方式，能帶形狀更適合載流子輸運。
  16. In recent years, with the increasingly demand of the broad band and multimedia communication, various powerful tools have been emerging in endlessly to increase the capacity of satellite channel and pcma ( paired carrier multiple access ) is just one of them

    近年來，隨著人們對寬帶和多媒體信息需求的日益增長，各種衛星通道容量倍增技術層出不窮，成對載波多址（ pcma ）技術即是其中的一種。
  17. Piezoelectric ceramic filters for use in electronic equipment. detail specification for piezoelectric ceramic band - pass filter type lt13. 2m for use in carrier. assessment level e

    電子設備用壓電陶瓷濾波器詳細規范. lt13 . 2m型載波機用帶通壓電陶瓷濾波器.評定水平e可供認證用
  18. In prototype system, a l - shaped non - uniform linear array with 5 elements is utilized to receive spatial signal with carrier frequency among 2 - 18ghz. the entire frequency band is decomposed into 1ghz sub - bands and then is mixed to 1ghz base band. the base band output of each antenna is sent through a synchronous 250mhz undersampling channels

    在本實驗系統中，我們設計了一個5陣元的l型非均勻陣列天線，將的頻段劃分成的子頻段，然後將每個子頻段混頻到的處理基帶后再進行的同步欠采樣。
  19. The principles of adaptive star - qam and the optimum constellation of star qam are given. in adaptive single - carrier modulation, a blind modulation detection algorithm based on higher order cumulants ( hoc ) for aqam and apsk is proposed. the excellent detection performance of algorithm is evaluated in gaussian and narrow - band rayleigh fading channel

    對自適應單載波和多載波調制中的調制方式盲檢測演算法進行了研究；在自適應單載波調制中，研究了窄帶通道下的aqam調制原理和aqam調制最佳星座圖結構；在rayleigh通道下和高斯通道下，提出一種基於高階累積量的aqam和adpsk調制方式盲檢測演算法，演算法具有良好的檢測性能。
  20. Piezoelectric ceramic filters for use in electronic equipment. detail specification for piezoelectric ceramic band - pass filters type. lt48b lt116b lt68d lt80d lt120d lt124d and lt124b lt172b for use in carrier assessment level e

    電子設備用壓電陶瓷濾波器詳細規范. lt48b lt116b lt68d lt80d lt120d lt124d和lt124b lt172b型載波機用帶通壓電陶瓷濾波器.評定水平e可供認證用
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