頻分復用 的英文怎麼說
中文拼音 [bīnfēnfùyòng]
頻分復用
英文
fdm frequency division multiplexing- 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...
- 分 : 分Ⅰ名詞1. (成分) component 2. (職責和權利的限度) what is within one's duty or rights Ⅱ同 「份」Ⅲ動詞[書面語] (料想) judge
- 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...
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A cable tv system has 100 commercial channels, all of them alternating programs with advertising. is this more like tdm or like fdm
100個頻道是頻分復用;每個頻道又由節目和廣告來時分復用。The future wireless mobile communication systems are expected to provide ubiquitous, high - quality, and high - rate mobile multimedia transmission. however, hostile multipath fading radio conditions give rise to serious inter - symbol interference ( isi ) ; even worse, wireless channel are often time varying, which makes the system more vulnerable and more difficult to track the channel state. orthogonal frequency dvision multiplexing ( ofdm ), which is inherently resistant against isi, has invoked a popular research interest in recent years, and has been a promising candidate technology of the physical layer for future weideband high - date - rate wireless communications. notwithstanding, ofdm is much more vulnerable to errors of both time and frequency synchronization and to that of channel estimation, and how to obtain correct timing and channel estimation efficiently is highly critical to ofdm systems. the dissertation will focus on both of the aspects of ofdm systems mentioned above
但是無線環境的多徑特性造成通信系統中嚴重的符號間干擾,同時無線通道的時變性使得通道特性跟蹤復雜。而正交頻分復用技術( orthogonalfrequencydivisionmultiplexing , ofdm )正是一種解決符號間干擾的有效傳輸手段,因此ofdm技術作為未來寬帶高速率無線通信的物理層候選技術在當前引起了一股研究熱潮。但ofdm系統對定時同步誤差和通道估計誤差非常敏感,如何在ofdm系統中準確快速地實現符號同步和通道估計是至關重要的,本論文將重點針對這兩個問題進行討論。However, the paralleling communication can meet the requirements of high speed and fidelity in underwater signal transmissions. ofdm is a kind of novel paralleling transmission technology. the principle of ofdm is that the whole bandwidth can be divided into some subchannels, the high - speed serial signal stream is modulated by some orthogonal subcarriers
正交頻分復用( ofdm )是近年來數字通信中流行的一種并行傳輸新技術,其核心思想是將整個可用頻帶分割成多個正交子通道,將待傳輸的高速串列碼流并行的調制在這些子通道載波上。Iterative inter - carrier interference cancellation in ofdm systems
正交頻分復用子載波間干擾抵消的迭代演算法Research of diversity combination in spread ofdm system
擴頻正交頻分復用系統中的分集合併技術The combination of cablemodem and hfc is a way to revamp the catv network to a hybrid videodata communications network. however, hfc uses sub - carrier fdm, which requires ad conversion before transmission. in that sense, the transmission quality will be compromised
雖然cablemodem與hfc配合,是將catv網改造成為視頻、數據混合通信網的一種可能選擇,但hfc採用副載波頻分復用方式,必須進行數模轉換才能傳輸,所以傳輸質量將受到影響。At present, orthogonal frequency division multiplexing ( ofdm ) technique has been widely used in wideband wireless communication systems, such as dvb and ieee 802
作為一種可以有效克服通道多徑效應的傳輸手段,正交頻分復用( ofdm )技術正得到日益廣泛的關注與應用。A subspace - based blind channel estimator has been developed for space time coding orthogonal frequency division multiplexing ( stc - ofdm ) system with two transmit antennas and two receive antennas
摘要針對使用2個發射天線和2個接收天線並且採用循環前綴的空時編碼正交頻分復用系統( stc - ofdm ) ,提出了一種通道盲估計演算法,並給出通道可被辨識的條件。Multiple - input multiple - output ( mimo ) technique, offers an effective way to combat and even exploit fading. another technique, orthogonal frequency division multiplexing ( ofdm ), proposed in 1960s, now has gained much attention with its ability to reduce system complexity
而60年代提出的正交頻分復用( ofdm )技術,由於能夠顯著簡化系統接收機的設計並具有優越的頻譜效率,近十多年來也獲得了極大的關注。In this dissertation, ofdm which has been the hottest spot in communication field recently will be considered as my direction. the dissertation will study some key techniques in mc - cdma system, such as modulation technique, peak - average power ratio, detection technique and synchronization problem of the whole system. what ' s more, the results of calculation and simulation will be given
本文以目前通信領域的熱點: ofdm (正交頻分復用)為研究方向,對于多載波cdma系統中的若干關鍵技術,即多載波cdma系統中的調制技術、峰平比性能、接收端檢測技術以及整個系統同步問題進行了研究,並給出相應的計算機模擬結果。In this paper, the fundament, the system architecture and the application of orthogonal frequency division multiplexing ( ofdm ) were discussed, and the mathematic model of time - varying multi - path based on the discussion of mobile fading channel characteristic were analysed, and the channel model were discussed by computer simulation
本文首先簡要介紹了正交頻分復用( ofdm )的基本原理、系統組成以及ofdm的實際應用。在分析移動通道衰落特性的基礎上,分析了多徑時變通道的數學模型;並用計算機模擬的方法對通道模型進行了討論。Research of fixed point of ldpc decoding over rice channel
分析正交頻分復用超寬帶A fast frequency tracking algorithm for ofdm
一種快速正交頻分復用頻率跟蹤演算法Cofdm coded orthogonal frequency division multiplexing
編碼正交頻分復用Joint estimation receiver for uwb - ofdm system
應用於超寬帶正交頻分復用系統的聯合估計接收機Ofdm orthogonal frequency division multiplexing
正交頻分復用Now cdma is very mature and becomes the key technique of the third - generation mobile communication systems. more and more attention is paid to the technique of multi - carrier. mc - cdma is combination of ofdm and cdma, thus advantages of both techniques are exploited
近年來移動通信技術發展迅猛,碼分多址技術到目前已經非常成熟,並成為了第三代移動通信系統的核心,人們將眼光聚集在正交頻分復用調制技術,將多載波調制技術應用於cdma中,從而兼具多載波技術和cdma技術的優點。The hfc network features fiber optics on the backbone but fdm in the transmission part. the wiring part comprises the coaxial cable system of tree topology for carrying and distributing information to user terminals
Hfc主幹系統使用光纖,採取頻分復用方式傳輸多種信息;配線部分使用樹狀拓撲結構的同軸電纜系統,傳輸和分配用戶信息。By the tuner, the dvb - t signal received has been converted to the if signal, and then demodulated by the cofdm demodulation chip. in the end, the usb controller sends the ts ( transport stream ) to the pc where it is decoded by the software
接收到的dvb - t信號經調諧器進行下變頻處理后輸出中頻信號,再進行cofdm (編碼正交頻分復用)解調,得到的ts碼流信號通過usb控制器送入pc機中進行軟體解碼播放。The application of adaptive allocation techniques to ofdm ( orthogonal frequency division multiplexing ) systems optimizes the use of system power
摘要自適應分配技術的應用能優化多用戶正交頻分復用系統功率的使用。分享友人