碼同步 的英文怎麼說
中文拼音 [mǎtóngbù]
碼同步
英文
code synchronization-
Quick and accurate acquest of signal is critical for the utility of an lpi radar
準確、快速的擴頻碼同步是編碼lpi雷達系統實用的前提。The realization of quick acquest under very low snr and big frequency shift is one of the key problems of lpi radar. we designed a new receiver which needs less computation spend without any decline of the performance of the radar
如何在較低輸入信噪比和較大頻偏的條件下實現擴頻碼快速捕獲是碼同步的難點，本文在不損失系統性能的基礎上，設計了一種結構簡單的接收機實現方案。Advanced synchronism technology solves the traditional problem in cooperation with sewing machine
進數碼同步科技，解決送帶機跟縫衣機協調上的傳統問題。Two new speech detection methods based on neural networks using barker coded synchronization signal are presented
提出了兩種採用巴克碼編碼同步信號並基於神經網路的起點檢測新方法。This paper focuses on the blind code synchronization approach and spreading sequences estimation algorithm. the main results can be summarized as follows : 1. both synchronous and asynchronous dsss / bpsk baseband signal models are established
本文重點是對盲碼同步和擴頻碼序列估計的研究，主要的工作成果如下: 1 、分同步和非同步兩種情況建立了dsss / bpsk基帶信號模型，並介紹了二種非合作式擴頻碼序列估計和解擴的方案。Moreover two types of non - cooperative sequences estimation and despreading schemes are introduced briefly. 2. several usual blind code synchronization methods, including delay multiply ( sliding autocorrelation ), maximum norm and average noise reduction approaches are summed up and analyzed by computer simulations
2 、總結和介紹了幾種常用的盲碼同步方法，包括延遲相乘（滑動自相關）法、最大范數法、平均降噪法等，並進行了計算機模擬和分析。After achieving the synchronization of the pn code and carrier, despreading and demodulating the received dsss signal can be executed with the local synchronized code and carrier. so, lots of energy and fund has been expended on it
直接序列擴頻系統只有在完成了偽碼同步和載波同步之後，才可能用同步的本地偽碼和本地載波對接收的擴頻信號進行解擴、解調。In this thesis, first, we present the theory of sess system, the generation of the sess spreading code and its characteristics and the acquisition theory of conventional spread spectrum communication system. an efficient acquisition scheme based on periodically transmitting the synchronization head, which is composed of binary chaotic codes, using the matched filter and automatic decision threshold - level control based on a so - called constant false alarm criterion for sess system is present. the acquisition model of sess system is built and simulated in the awgn channel, the raleigh fading channel and imulti - address interfere condition
本文首先概述了自編碼擴頻通信的原理、自編碼擴頻序列的產生方法及其特性和擴頻通信系統編碼同步的理論，然後針對自編碼擴頻通信系統提出了擴頻序列捕獲方案:周期性地加入混沌序列同步碼，並採用恆虛警率匹配濾波器捕獲法;在加性白高斯噪聲通道、瑞利衰落通道和多址干擾情況下進行了模擬，分析了各種捕獲性能:在選擇性能最優的混沌序列、適當的序列長度、虛警概率及門限值的情況下，可以獲得較短的捕獲時間和較大的捕獲概率。Increased effort to synchronize models with other artifacts, such as source code
需要將模型與其它製品，如源碼同步所增加的工作Pn code synchronization algorithm based on serial - search acquisition scheme and delay - looked loop tracking is discussed in detail
闡述了基於滑動相關捕獲及延遲跟蹤環跟蹤的偽碼同步技術的設計與實現。The method of picking up synchronizated signal is digital phase - locked loop, which is picking up phase information from the suddenly toggle between codes
提取碼同步信號一般採用鎖相環技術，利用碼元間存在的瞬間跳變獲取需要的相位信息。To begin with, the dissertation introduces the origin of this project, the content and meanings of its research, and discusses the development of acquisition in inland and oversea
本文研究了衛星導航定位系統以及其用戶機中擴頻碼同步部分中快速捕獲演算法的發展現狀。The digital base - band cdma transmitting and receiving scheme is put forward. the scheme uses a technique called as zero medium frequency without the need of pn codes synchronously are resumed
提出了具有免偽碼同步恢復、免載波同步提取、免位同步的零中頻cdma數字基帶發送、接收方案。Synchronization technique of spread spectrum code is utilized in two stages. multipath searcher coarsely estimates the pn code phase and code tracking confirm the pn code phase precisely
這需要採用擴頻系統中擴頻碼同步技術，即:多徑搜索粗略地估計pn碼相位，同步跟蹤精確確定pn碼相位。The design of pn code synchronization should find a trade - off between the performance and the complexity of the reciever. in this paper, the pn code synchronization technique in spread spectrum communication is introduced
本論文首先介紹擴頻系統中採用的pn碼同步技術，然後結合wcdma上行鏈路的特點，提出適合wcdma上行鏈路的擴頻碼同步方案。Secondly, the dissertation presents a 3 - dimensional searching method with afc and pn code synchronization and adaptive array convergence in order to accurately estimate the frequency difference between the received signal and the local oscillator
其次，為了準確估計接收信號和本地振蕩器之間的頻差，提出了afc 、 pn碼同步、自適應陣收斂的三維搜索策略。Secondly, some encryption algorithms are introduced, with the analysis and comparison for these encryption algorithms, the author designs an appropriate project to accomplish the end - to - end encryption. thirdly, this paper accomplish the design of an encryption scheme which combining the strongpoint of the rsa algorithm and the idea algorithm. the main process is as following : first, input the digital signal to the encryption device, and then the digital signal exclusive or with the keying sequence which is generated by key stream generator ( ksg ) and the ksg is based on the idea encrypting and deciphering algorithm, the secret key synchronization is also studied
本課題主要研究的內容是數字集群通信系統加密機制的研究，首先介紹了數字集群通信系統的安全保密機制，講述了單向和雙向鑒權的過程、單呼和群呼的空中介面加密過程及其密鑰的選用和管理，特別介紹了端到端加密;然後介紹了幾種常用的加密演算法，通過分析其優劣，提出了端到端加密的解決方案;最後完成了基於rsa演算法和idea演算法的數字集群通信系統加密方案的設計，其具體過程為將經過數字信號送入加密器里，和以idea加密演算法為基礎設計的密碼流發生器（ ksg ）產生的密碼序列進行加解密運算，並且研究了此加密過程的密碼同步問題。This dissertation adopts a universal digital ds / dmpsk modulation and demodulation scheme which is based on fpga. this scheme adopts quadrature balanceable modulation, intermediate frequency sampling, digital matched filtering, delay differential demodulation techniques and so on. it directly processes the digital signals on intermediate frequency without down - conversion, and doesn ’ t need pseudo random codes synchronization and carrier wave extraction circuits
本文採用了一種基於fpga的通用數字調制解調方案，該方案在調制端採用了正交平衡調制技術，在解調端採用了中頻帶通采樣、數字匹配濾波、延時差分解調等技術，直接在中頻上進行數字信號處理，不需要進行下變頻，也不需要增加額外的偽隨機碼同步捕獲和載波提取電路。Services for unix provides file sharing, remote access and administration, password synchronization, common directory management, a common set of utilities, and a shell
面向unix的服務提供文件共享、遠程訪問和管理、密碼同步、公共目錄管理、一組通用實用工具和一個外殼。To synchronize the code lock in a manner that the clr is aware of instead of synchronizing the lock using unmanaged code
以clr能識別的方式來同步代碼鎖，而不是使用非託管代碼同步鎖。分享友人