spread-spectrum technology 中文意思是什麼

spread-spectrum technology 解釋
展頻技術
  • spread : vt （spread）1 伸開，伸長（手臂等），展開，張開（帆等），打開（地圖等）；鋪開（氈子等），展寬，展...
  • spectrum : n. （pl. -tra ）1. 【物理學】譜，光譜；波譜；能譜，質譜。2. 【無線電】射頻頻譜；無線電（信號）頻譜。3. 【心理學】（眼睛的）余像；殘像。4. 〈轉義〉范圍，幅度；（連續的）系列。
  • technology : n. 1. 技術，工程，工藝。2. 製造學，工藝學。3. 術語（匯編）。
  1. Then studies a peculiar multi - carrier direct sequence spread spectrum ( mc - ds - cdma ) technology, analyzes the methods of processing multi - carrier signals and study the mathematical module of multi - carrier communication system receiver

    然後對本文所研究的這種特殊的多載波直接序列擴頻技術進行闡述，分析了多載波信號處理的方法和研究了多載波接收機的數學模型。
  2. This paper mainly focuses on the noise limiting by means of the direct sequence spread spectrum ( dsss ) and the analysis of the transmission performance of the plc and some digital modulation technology. the contents of the paper is as follows : 1 ) the technical feasibility is proved after simulating noise limiting principle of dsss by means of systemview, the simulation software ; 2 ) a kind of band pass filter ( bpf ) is realized according to the requirement of filter and the principle of butterworth approximation, which satisfies the index of performance of dsss. 3 ) the low voltage plc system includes the sc1128, the specific modulation / demodulation ic, the bpf filter and other circuit components, furthermore, the control function of system is realized by means of the personal computer and the microcontroller

    本課題在對低壓電力線的傳輸特性和數字調制技術進行分析的基礎上，將通信理論中的直接序列擴頻技術（ dsss ）用於解決低壓電力線通信的干擾問題，主要研究內容如下： （ 1 ）用通信模擬軟體systemview對dsss技術的通信和抗干擾原理進行模擬分析，分別對時域和頻域下採用dsss技術前後接收信號的頻譜進行分析，驗證dsss技術在本系統中的可行性； （ 2 ）由dsss技術對濾波系統的要求，根據濾波理論分析了巴特沃思型濾波器的逼近原理並設計了合適的濾波電路； （ 3 ）用調制解調晶元sc1128和自行設計的濾波器加之輔助外圍電路，構造出低壓電力線載波通信系統，並採用atmel公司的單片機設計了接收和發射電路的微控制器； （ 4 ）分別對採取抗干擾措施前後輸入和輸出信號進行對比實驗，並對結果進行分析，驗證了dsss技術對干擾信號的抑制作用。
  3. The design of power line spread spectrum carrier communication system in fpga with digtal technology

    的數字化電力線載波擴頻系統的設計
  4. According to the principle of spread spectrum communication, the anti - interference performance of the technology is discussed and the composition of power line spread spectrum communication is described. based on the spread spectrum technique, a method which is low cost, high communications quality and low bit error for power line carrier communication using single - chip software programming is proposed

    利用擴頻通信原理，分析擴頻通信的抗干擾特性，在此基礎上，闡述了電力線載波通信系統的基本結構，提出了一種利用軟體編程實現電力線載波擴頻通信的方法。該方法不增加硬體成本，即能達到提高通信質量、降低誤碼率的目的。
  5. This paper presented a general systematic view, application and current development of the power line carrier transmission technology, and clearly compared some existing power line carrier communication chip with each other. then the authors analyze the channel " s characters of low voltage power line, and formed an abstract carrier channel model. using this as its basis, a new kind of transmission technology is designed that adopted transmission technology combining the spread spectrum modulation with channel coding, which can solve the problems above mentioned to a certain degree, and need not pay for high cost

    文章不僅全面地介紹了電力線載波通訊技術的特點、應用及其發展狀況，還對目前的電力線載波通訊晶元進行了比較；並通過對低壓電網通道特性的分析和研究，抽象出其載波通道模型，在此基礎上，提出了將擴頻調制和通道編碼相結合的傳輸技術用於低壓電力線載波通信，這可以在很大程度上解決電力線的干擾問題，且不必付出高昂的代價。
  6. 4. analyzed two types of spread spectrum ( dsss and fhss ) approved by the fcc based on the characteristic of phy layer ; then analyzed the characteristic and technology of the cck modulation and at last put forward an improved cck scheme that will increase the data rate of wlan to 16. 5mbps

    針對物理層的特點，討論了無線局域網的兩種擴頻技術? ? dsss和fhss ，分析比較了兩者的性能特點和適用的范圍，並探討了一種支持高數據數率的cck調制方式以及使速率能達到16 . 5mbps的cck改進方案； 5
  7. The application of spread spectrum technology can increase dimension of signal in order to improve signal power and achieve code gain

    擴頻技術的應用可以增加信號維數以提高信號功率也可獲得編碼增益。
  8. This paper presented a general systematic view of the power - line data transmission through ssc ( spread - spectrum communication ) technology. furthermore, it put forward two application schemes in the automatic reading ammeter system

    系統、全面地介紹了電力線載波通訊技術的特點、應用及發展狀況，並對目前的電力線載波通訊晶元進行了比較；同時，也提出了電力線載波通訊技術運用在遠程自動抄表系統中的應用方案。
  9. It is involved with the theory of spread spectrum communication, the theory of missile controlling and guiding, and corresponding practical digitized technology

    研究涉及擴頻通信理論、制導理論及相應的實用數字化技術。
  10. The design on twice civil air defense alarm system in this paper adjoint spread spectrum technology and scm technology based on spread spectrum communication theory to realize remodel of once cvivil air defense alarm system

    本文設計的二次人防警報就是在擴頻通信理論的指導下，將擴頻技術和單片機技術相結合對一次人防警報實現改型。
  11. This paper brings forward the idea that we can combine tame spread - spectrum technology and software radio technology in one military communication system. such system is compatible, and it is difficult to be jammed

    本文提出了將軟擴頻技術和軟體無線電技術相結合在同一軍事通信系統中的觀點，使系統同時具有較強的抗干擾和較好的兼容性。
  12. The theory and main characteristics of wireless spread - spectrum technology are analyzed, and based on it, a wireless local area network ( wlan ) of gps real - time supervisory system for roller compaction is established, which not only implements the bidirectional data communication between general control center and each mobile remote, but also achieves resource share among each node of the wlan

    摘要分析了無線擴頻技術的原理及主要特點，組建了碾壓gps實時監控系統的無線局域網，實現了總控中心和各移動遠端的雙向無線數據傳輸及局域網內各節點的資源共享。
  13. An application of spread spectrum technology in deep space tracking telemetering amp; amp; control tt amp; amp; c system

    擴頻技術在深空測控通信中的應用
  14. This paper discusses an application of spread spectrum technology in deep space tracking telemetering & control ( tt & c ) system, proposes a spread spectrum microwave unified tt & c system ( ss - muttcs ). then the constitution, principles, performances and key techniques of ss - muttcs are analyzed

    討論了擴頻技術在深空測控通信中的應用，提出一種擴頻體制微波統一測控系統（ ss - muttcs ） ，並簡要分析其組成原理、性能和關鍵技術。
  15. In this paper, a complete scheme is proposed for el wireless spread spectrum modem in tdd mode. firstly, it discusses tdd protocols and base band module. secondly, with in - depth ananysis on hfa3860b and its high speed spread spectrum technology ( mbok ), we incorporates the chip for continuous and transparent transmission of el data successfully

    論文在對hfa3860b進行深入研究的基礎上，對晶元所採用的高速擴頻技術? mbok擴頻技術進行了理論探討，並成功地將其用於e1數據的無線擴頻透明傳輸，實現了系統要求，並且拓寬了晶元的應用范圍。
  16. A lower voltage power line carrier communication system on spread spectrum technology based on this condition is designed, which is composed of a singlechip computer at89c51 and pl2101b. this article described the hardware and software of the system, and the field - test showed the system is feasible

    在此基礎上，開發了基於擴頻技術的低壓電力線載波通信系統，系統主要由at89c51和擴頻通信晶元pl2101b組成，完成了該系統的硬體設計、製作，軟體的編程和調試。
  17. This article briefly presented the principle of lower voltage power line carrier technology and spread spectrum technology, and discussed the advantage, the mode, the current state of spread spectrum technology applied to lower voltage power line carrier communication, and analyzed the channel transmission characters of lower voltage power line with mechanical contact

    在本文中，簡要闡述了低壓電力線載波技術和擴頻技術的原理，討論了擴頻技術在低壓電力線載波通信中應用的優點、方式和現狀，並通過大量實驗，分析了帶機械接觸的低壓電力線路的傳輸特性。
  18. The spread spectrum technology has got wide usage upon communications, telemetry, and orientation because of its strong anti - interference ability, low probability of being intercepted and captured, strong discrimination ability, outstanding multi - access communication ability, and excellent secrecy

    直擴通信技術由於具有很強的抗干擾能力、很低的被截獲概率、很高的距離鑒別力、良好的碼分多址通信能力和很好的通信保密性等特性，在軍事民用通信和遙測、定位領域得到了廣泛的應用。
  19. At the same time, this algorithm takes good use of digital spread spectrum technology to embed the watermarking repeatedly

    同時，在嵌入水印時利用了數字擴頻技術，對水印進行多重嵌入。
  20. This paper introduces the application of the spread spectrum technology in communications. aiming characteristic in cdma communication systems, after we discuss some multi - user detection technology at present, and want to find a effective multi - user detection method with a small bit error rate in cdma communication

    本論文主要介紹擴頻技術在通信中的運用，針對cdma通信系統的特點，研究了現有的一些多用戶檢測技術，希望通過研究找到一種有效的cdma通信的多用戶檢測的方法。
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