頻率多路復用 的英文怎麼說

中文拼音 [bīnlǜduōlùfùyòng]
頻率多路復用 英文
frequency multiplex
  • 頻 : Ⅰ形容詞（次數多） frequent Ⅱ副詞（屢次） frequently; repeatedly Ⅲ名詞1 [物理學] （物體每秒鐘振動...
  • 率 : 率名詞（比值） rate; ratio; proportion
  • 路 : 1 （道路） road; way; path 2 （路程） journey; distance 3 （途徑; 門路） way; means 4 （條理） se...
  • 復 : Ⅰ形容詞1 （重復） repeated; double; duplicate 2 （繁復） complex; compound Ⅱ動詞1 （轉過去或轉過...
  • 用 : Ⅰ動詞1 （使用） use; employ; apply 2 （多用於否定: 需要） need 3 （敬辭: 吃; 喝） eat; drink Ⅱ名...
  • 頻率 : frequency; rate
  1. In all kinds of complicated network, oriented linking and unlinking, communication frequency resource is strained, and bandwith to transmitting audio frequency signal is too restricted, complicated and fluky, while audio frequency data exponential have been increased in the last several years. under the circumstances, based on the research of predecessor, this paper studies wavelet analysis ' s maths gist and practices significance on signal process, and puts forward a optimized wavelet package condensation arithmetic to process audio frequency data, which gives attention to coding efficiency, multirate and compression delay. simulation experiment on the arithmetic has been done by matlab

    針對無連接和面向連接的各種復雜網路環境下，通信頻帶資源緊張，音頻傳輸帶寬有限且復雜多變，而各種音頻數據又日益增多的局面，本文研究小波分析在信號處理方面的數學依據和在數據壓縮方面的實際意義，在前人不斷工作的基礎上，提出了一種優化小波包變換編碼方案用於音頻數據的壓縮演算法，兼考慮了編碼效率、多碼率和壓縮時延多個方面，並在matlab環境下做了模擬實驗，對各種音頻信號及多種小波函數做了模擬結果比較，實驗結果證明該演算法可以在一定計算復雜度下可以很好地改進壓縮效果，達到多碼率下實現實時編解碼的過程，在高速dsp晶元等硬體設備支持下，可以有效應用於實際復雜多變信源編碼。
  2. Orthogonal frequency division multiplexing ( ofdm ) is a special case of multicarrier transmission, in which a single high data rate datastream is transmitted using a number of lower data rate subcarriers

    Ofdm （正交頻分多路復用）是一種特殊的多載波傳輸方式，由於它使用一系列低速子載波并行傳輸數據，使得傳輸速率得到大幅度提高。
  3. Orthogonal frequency division multiplexing ( ofdm ) is a special case of multicarrier transmission, in which a single high rate datastream is transmitted using a number of lower data rate subcarriers

    Ofdm （ orthogonalfrequencydivisionmultiplexing正交頻分多路復用）是一種特殊的多載波傳輸方式，由於它使用一系列低速子載波并行傳輸數據，使得傳輸速率得到大幅度提高。
  4. The advantages of using leo satellite are as following : on the one hand the satellite orbit is low, so the transmission delay is short, the power loss is small ; on the other hand the development of cell communication, multi - access, frequency multiplex and etc also provide a technique guarantee to the leo satellite - mobile - telecommunication. so the leo system is considered to be a satellite - mobile - communication system with a great future

    低軌道衛星是一種運行於1000公里左右的高空中的人造衛星，利用leo衛星實現個人通信的優點在於：一方面衛星的軌道高度低，使得傳輸延時短、路徑損耗小，多個衛星組成的星座可實現真正的全球覆蓋，頻率復用更有效：另一方面蜂窩通信、多址、點波束、頻率復用等技術的發展也為低軌道衛星移動通信提供了技術保障。
  5. The first full - color two - way video teleconferencing service is offered. the development of tfm ( time frequency multiplexing ). the first compact disk players are available for sale in the u. s

    第一個全彩色雙向電視電話會議業務開通。開發tfm （時間頻率多路復用） 。美國開始出售第一個光盤播放器。
  6. The concept of viffoal laser frequency stabilizaion is put fowi. the frequency stabilizaion at the center of doppler curve has been realized aller signal detecting, phase sensitive detecting, integrating and high voltage amplifying circuits with fm spectroscopy a frequency stability of l0 -, has been obtained with a reproducibility of l0 - 9. hyperfine spectra of, ', i, near 532nm have been studied via modul8tion tfansfer spectroscopy

    利用fm光譜法將激光單次通過碘吸收室進行線性吸收，再經信號檢測、混頻、積分和高壓放大等伺服電路，實現了在多普勒曲線中心處的頻率穩定，頻率穩定度和復現性可達10 ~ （ - 9 ）量級。
  7. In the initial stage, there were only gsm 900 networks. in order to provide higher wireless capacity, various frequency reuse technologies were used, including frequency hopping, mrp, iuo, etc. however, the higher the capacity, the more serious the interference

    由於網路初期只有gsm900 ，為了提供更多的無線容量，採用了各種頻率復用技術，如跳頻、 mrp 、 iuo等方式，容量提高的同時也引入的更大的干擾。
  8. The technology of direct sequence spread spectrum / code division multipul access ( dsss / cdma ) are applied in the broadband code division multiplex wireless communication systems, which means transmitting data at the rate of 2. 048mbps using four e1 lines within the band of 20mhz. in this paper, the theory of the whole debice is first analysized specified for the system asic design and optimizing its performance

    寬帶碼分復用無線傳輸系統是採用直接序列擴頻/碼分多址（ dsss / cdma ）技術，在20mhz頻帶內實現四路2 . 048mbps的e1鏈路數據速率的無線傳輸。本文首先分析了整個數傳設備實現原理，針對系統asic設計和優化整機集成性能出發，提出並實現了基於fpga控制pm4314e1晶元的介面模塊完成對e1鏈路信號的監控和告警功能的改進方案。
  9. There are a lot of signals transmitted in the optic fiber communication system, such as : video, audio, data, telephone or other user - defined signals. if one fiber transmites one signal, it will take a lot of money. it is necessary to take multiplexing in order to make use of optic fiber effectively and reduce the cost

    在光纖通信系統中要傳輸的信號有許多種，如視頻圖象、音頻、數據、電話或其他用戶自定義的信號，每種信號分別用一條光纖線路來傳輸，必然價格昂貴，所以為了提高光纖的利用率，降低成本，必須將各種信號進行復用。
  10. According to the characters of the power harmonic, a kind of self - adaptive harmonic detection method based on in - phase correlation filtering is presented, which is clear and concise in thinking. by this method the low - pass filter can be designed easily, and by using the multiresolution and self - adaptive technique the difficulties of harmonic detection with low variable fundamental frequency and no voltage reference are worked out, which contributes much to the implementation of harmonic suppression

    該方法思路清晰、簡潔，並能方便有源濾波器（ apf ）中低通濾波器設計，同時採用多解析度和自適應濾波方法，解決了基波頻率低且變化、無明顯電壓基準可尋的復雜供電系統諧波檢測的難題，為諧波抑制的實施奠定了基礎。
  11. Recently, multiple input multiple output ( mimo ) system which originates from the employment of multiple antennas at transmitter and receiver has many advantages such as large system capacity, high spectral efficiency. on the other hand, orthogonal frequency division multiplexing ( ofdm ) which bases on the orthogonal transmission of sub - carriers also has some obvious merits such as strong anti - multipath ability, high spectral efficiency. the combination of the two techniques mimo - ofdm, has become a hotspot recently and regarded as promising technique for future next - generation mobile communication systems

    近來，在無線通信系統中的收發兩端同時使用多根天線的多入多出（ mimo ， multiple - input - multiple - output ）通信結構，具有系統容量大、頻譜效率高等優點;基於正交的多路子載波并行傳輸的正交頻分復用（ ofdm ， orthogonalfrequencydivisionmultiplexing ）技術，具有抗多徑能力強、頻譜效率高等優點，二者的結合，即mimo - ofdm技術，被認為是構建下一代移動通信系統的框架技術。
  12. The dissertation relates mainly to the algorithm of bit - rate control and the technology of statistical remultiplex

    本論文主要講述mpeg2視頻流的碼率變換演算法的研究以及多路碼流的統計復用技術。
  13. The algorithm study is in detail that one channel of video - stream is recompressed by mpeg - 2 standard so that its bit - rate will be changed lower. then, multi - date streams will be processed by the technology of statistical remultiplex. the dynamic signals of every single data - stream " output can drive the values of bit - rate of the corresponding single data - stream

    本次演算法研究具體地說就是按照mpeg - 2的標準對單路mpeg - 2視頻流再次壓縮，將其碼率變的更低，並且提出對多路碼流進行統計復用，根據單路碼流的輸出動態信息對碼流進行動態的調整的框架。
  14. Due to a variety of advantages, such as high bandwidth efficiency and excellent anti ? multipath performance, orthogonal frequency division multiplexing ( ofdm ) has received considerable attentions and been widely used in many fields

    正交頻分多路復用（ ofdm ）因具有頻帶利用率高和抗多徑能力強等優點，近年受到廣泛的重視。
  15. Its main characteristics include the following parts : ( 1 ) the trait of matching of network, as it manages the information of peers by grouping according to their location in the internet ; ( 2 ) easy to implement, as it distributes the video data according to the need of peers, and does not have to maintain a complex global structure ; ( 3 ) robust and resilient, as it can adapt the complex and dynamic environment of network very well ; ( 4 ) good expansibility, as it has better performance with the increase of users ; ( 5 ) high utilizing of bandwidth, as it can control the peers according to the change of bandwidth of them and make good use of their bandwidth ; ( 6 ) low delay of peer to peer, as it considers the delay among peers sufficiently besides the bandwidth, and makes the delay of peer to peer is low

    該視頻流媒體網路模型在網路帶寬效率、延遲和可靠性之間做出了很好的平衡，它的主要特點有: （ 1 ）網路匹配特性，使用終端用戶的網路位置信息來對節點進行分組管理，對節點間的鄰近度進行優化; （ 2 ）易於實現，根據數據的流向來分發視頻流媒體數據，不需要維護復雜的數據結構; （ 3 ）適應性強，能很好的適應復雜變化的網路環境; （ 4 ）擴展性好，加入視頻流媒體網路中的用戶越多，性能越好; （ 5 ）帶寬利用率高，及時對每個節點的帶寬變化情況進行控制，充分利用空閑帶寬; （ 6 ）端對端延遲小，通過在帶寬和延遲之間達到平衡使得端對端延遲減小。
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