明碼通信 的英文怎麼說
中文拼音 [míngmǎtōngxìn]
明碼通信
英文
clear text-
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。Finally, with the optimized chaos sequences, the results of software simulation on vhf - rc indicates that ds - ss outbalances the bpsk system without spread spectrum due to ber and the ds - ss with kent sequence is better than the one with golden sequence in some extend
最後本文對數字混沌序列進行了優選，在超短波中繼通道模型上的模擬結果表明混沌直擴通信相比于非擴頻的bpsk通信在誤碼率方面明顯較低；相對于線性擴頻碼（ gold序列） ，同樣誤碼率較低。It preestablish a parallel design pattern for each parallel project based on master / slave architecture, and the communication between computers is transparent to programmers. in another words, when programmers are developing parallel programs, they do n ' t need to learn any complicated primitives and write any codes related with communication between parallel tasks. just only set some parameters in the visual interfaces that provided by platform, and the codes will be generated by our system automatically and inserted to the fittest place in the files
系統為每一個并行計算工程設定了一個基於master slave架構的并行編程模型，並且使得各結點機之間的通信對于開發人員透明化，也就是說，開發人員在開發并行程序時，無需了解紛繁復雜的通信原語，不涉及任務之間通信的代碼，只需要在并行程序開發平臺提供的可視化界面上對數據的傳送進行設定，通信代碼將自動生成並插入到程序合適的地方。Above all, [ 12 : 8 ] harming error correction theory is mentioned in this paper. the edac circuit designed by vhdl can works normally at different frequency of the cpu clock such as 66mhz 50mhz 40mhz 33mhz. the edac function of the circuit can also be disabled by software tool. meanwhile, some basic devices such as and logic, or logic, not logic and some small scale integrated circuits are also integrated in the fpga
本論文闡述了12 ， 8漢明碼糾錯設計過程，採用vhdl語言實現糾錯編碼器（ edac ） ，本設計能夠適應cpu時鐘信號clk2的不同頻率，如66mhz 、 50mhz 、 40mhz 、 33mhz ，並且能夠通過軟體的控制使fpga的糾錯編碼功能關閉。The simulation results show that the information hiding technology based on channel coding has better imperceptibility and security
模擬結果表明基於通道編碼的信息隱藏技術具有較好的不可檢測性和較高的安全性。Guilin new mingke communication equipment company qpsk modulator, mpeg - 2 encoder and multiplexer. digital microwave equipment
桂林新明科通信設備有限公司- qpsk調制器mpeg - 2編碼器復用器數字微波設備Information technology - computer graphics - metafile for the storage and transfer of picture description information - part 4 : clear text encoding
信息技術.計算機圖形.圖像說明信息的存儲與傳送用元文件.第4部分:明碼通信報文編碼For wireless communications, direct sequence code division multiple access ( ds - cdma ) techniques have received a great deal of attention due to the expectation of capacity increase, interference rejection capability, security, and so on. in a high data rate application such as multimedia services, however, the capacity of ds - cdma systems is limited by both the inter - chip, or inter - symbol interference
Cdma技術以其高抗干擾能力、高容量、高保密性等技術優勢在第三代移動通信系統中被廣泛應用，然而在高速數據業務中，嚴重的碼間干擾和符號間干擾會導致系統性能明顯下降。This paper proves the optimality of linear network coding, making possible the realization of network coding in practical applications
該文證明線性網路編碼之最優性，並將網路編碼理論落實至實際應用，為網路通信帶來突破發展。Then we uses the scheme that has the variable gain based on the kalman filtering model realize two steps phase - locks ring circuit track technology, this kind has the advantage that when changed the gain the digital phase - lock link to be allowed simultaneously to realize the fast capture and the reliable track, the simulation analyzes its capture performance
模擬結果表明，自編碼直擴通信系統的編碼捕獲性能具有可行性。採用基於卡爾曼濾波模型實現具有可變增益的二階鎖相環路的跟蹤技術，這種具有時變增益的數字鎖相環可以同時實現快速捕獲和可靠跟蹤，其捕獲性能要比傳統數字鎖相環改善很多。We put the emphases on the soft output viterbi algorithm ( sova ), which is one of turbo code ’ s decoding algorithms, and presents the derivation and computation step of the sova decoding algorithm. after presenting sova and map decoding algorithms and analyzing four kinds of decoding algorithms, the paper makes a comparison among the different decoding algorithms by emulation analysis, and analyzes the time complexity of various algorithms, and then contrasts them. in the last part of this paper, according to the criterion recommended by the consultative committee for space data systems ( ccsds ), including code rate,
根據空間數據系統顧問委員會（ ccsds ）為turbo碼應用於深空通信系統推薦的標準，包括碼率、碼塊大小、分量碼類型、約束長度、碼生成多項式，以及交織器的選擇等參數的建議以及sova譯碼演算法的理論基礎，設計了sova演算法的實現結構，通過模擬驗證了本文所採用的turbo碼的性能，從而證明turbo碼確實是一種很好的通道糾錯編碼方式，它適用於要求功耗低或信噪比低的深空通信系統中。H. 26l / h. 264 is a new video compression standard provided by itu - t and iso / iec, which faces to very low rate video communication. it uses a new dct transform method as 4 * 4 integer dct. it can reduce block effect, while it is clear and easy to realizen, has high precision, computes fast and costs less memory
H . 26l / h . 264是itu - t與iso / iec聯合提出的一種較新的面向甚低碼率視頻通信應用的視頻圖像壓縮標準，採用了一些新的編碼技術，使用了新的dct變換方法: 4 4整型dct變換，該變換具有減小方塊效應，演算法明晰簡單、易於實現，運算結果精度高且不會溢出，運算速度快，佔用內存小等優點。The simulation result shows that this technology can reconstruct signal and erase intersymbol interference, so that the performance of communication system is improved
模擬結果表明，它可以使信號實現重構，消除碼間干擾，提高通信系統的性能。According to the trend, this paper introduces the technology of database and pc ' s serial port communication, which is adopted as the technology premise of wireless surveillance control system. and it illustrates the key technologies of how to realize the wireless surveillance control system. by making full use of its possible expansibility, flexibility and pervasive applicability, as well as the serial port communication technology, scada could help to transmit batch of data effectively, extend the ascii code serial port communication processing in the mscomm components and transmit the large - scale data stream
針對這一趨勢，論文在介紹了作為無線監控軟體系統的技術前提的數據庫技術和微型計算機串列口通信技術的基礎上闡述了實現無線監控軟體系統的各項關鍵技術，對利用數據庫系統對數據結構間的關系的嚴格定義和約束實現系統的可擴展性、靈活性與普遍應用性、利用計算機串列口通信技術實現批量數據傳輸、實現了數據的有效傳遞、 mscomm控制項中擴展ascii碼的串口通信處理和大型數據流的傳輸等項技術作了詳盡地說明，並對已完成的系統作出了評價，提出可以進一步改進的意見。Nevertheless, quantum cryptography, which is based on quantum physics, has been proved to be an effective technique for secure key distribution
然而，基於量子物理原理的量子密碼學已被證明是保密通信中密鑰安全分配的有效手段。Quantum cryptography ( qc ) is the combination of classical cryptography and quantum mechanics. the characteristics of quantum mechanics, such as no - cloning theorem and heisenberg ' s uncertainty principle, provide the perfect secrecy for quantum cryptographic communication
量子密碼學是密碼學與量子力學結合的產物，利用量子不可克隆定理和海森堡測不準原理等量子特性，量子密碼通信理論上已經證明是絕對安全。Concretely, on the basis of describing the communication specification of arinc 429 with enhanced parallel port ( epp ), the standard and the module application of dsp and cpld, the thesis has proposed the design of the arinc 429 technology based on dsp system. at first, the function and the application of each module of the system and the operation principle of high - performance cmos bus interface circuit hs - 3282 chip which forms the main body of the data diversion of the interface module are introduced. secondly, the hardware structure of the interface module is described in detail, mainly including data latch and buffer circuit, choice circuit of transmission rate, etc. and then the design philosophy and flow charts of the software are fully discussed, such as the basic requirement of software, the design and realization of the function
本文在簡單的論述了pc並口協議（ epp ）與dsp之間的通信方法、 cpld模塊邏輯控制應用和arinc429的通訊規范的基礎上，給出了基於dsp的arinc429通訊介面的設計方案:對通訊板中各模塊的功能和應用以及構成數據轉換主體的總線介面晶元hs - 3282的工作原理做了說明;介紹了本設計所用的dsp和cpld的功能概況;詳細敘述了通訊板介面模塊的硬體結構設計，其中，對數據緩沖電路、數據傳輸速率選擇電路、邏輯控制電路等各關鍵點做了重點介紹;具體闡述了軟體設計思想及流程圖，包括軟體的基本要求和功能的設計與實現;接著從埠譯碼單元、 i / o通道、電平轉換電路等方面進行了介面模塊的軟、硬體調試;最後，給出了測試結果，對研製工作做了總結，對本設計的優缺點各做了評述。With import and export rights, the international exhibition, investment and financing, and other qualifications, mainly in the following areas : petroleum, chemical engineering ; paints, rubber and plastics. surface treatment ; energy, metallurgy, iron and steel ; wood ; medical, maintenance, pharmaceutical, medical ; textile and leather ; electronic components instrumentation ; communications, radio and television equipment, media programs ; hvac refrigeration, building materials, engineering and construction ; security, protection, fire ; hardware, tools ; iec electrical, lighting ; lamps and accessories, supplies and maintenance ; environmental protection, water treatment ; machinery and equipment industry ; paper, printing and packaging ; logistics ; secondary transfers ; gifts, toys, jewelry ; food, beverage, forestry, animal husbandry and fisheries ; household goods, hotels, beauty care ; it equipment, digital products, software ; office of books, educational equipment ; sports, leisure, sports goods ; wearing apparel, shoes, and hats, bags ; household appliances, audio - visual equipment, professional lighting ; international exhibitions ; transnational agent ; business services, advertising and other areas of international trade, international investment and financing
具有進出口權、國際會展權、投融資等資質，目前主要從事的領域有：石油、化工；塗料、橡塑、表面處理；能源、冶金、鋼鐵；木材；醫藥、保養、制藥、醫療；紡織、皮革；電子元器件儀器儀表；通信、廣電設備、傳媒節目；暖通製冷、建材、工程建築；安防、防護、消防；五金、工具；電工電氣、照明；汽摩及配件、用品、維修；環保、水處理；機械及行業設備；紙業、印刷、包裝；物流；二手轉讓；禮品、玩具、珠寶首飾；食品、飲料、農林牧副漁；家居用品、酒店、美容護理； it設備、數碼產品、軟體；辦公圖書、教育裝備；運動、休閑、體育用品；服裝服飾、鞋帽箱包；家電、影音設備、專業燈光；國際性展覽會；跨國代理；商務服務、廣告等領域的國際貿易、國際投融資。Secondly, we apply tk operator to the cross - correlation of received signal code and pn code to separate the multi - paths. it comes to a conclusion that tk operator can separate the multi - paths within less than the chip period accurately of spread - spectrum system with space - modulation by simulation. at last, we apply this algorithm to the practical signal collected by gps tap, and from the result we can drop a conclusion the tk algorithm is practical
本文首先闡述了時空調制擴頻信號原理以及在多徑干擾下時空調制接收機的性能和teager - kaiser接收機的原理;接著對時空調制擴頻系統的解調信號與偽碼的互相關函數採用tk接收機進行多徑分離，模擬結果表明， tk接收機對時延在一個碼片內的時空調制擴頻通信多徑信號有很好的分離效果;最後用數據採集器對一個gps信號進行接收和多徑的估計，驗證了該演算法在實際的運用中對多徑的擴頻信號有很好的分離效果。In communications, a series of codes to denote the end of a message
在通信技術中，指明報文結束的代碼序列。分享友人