spread spectrum technique 中文意思是什麼

spread spectrum technique 解釋
擴展頻譜技術
  • 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。
  • technique : n. 1. （專門）技術；（藝術上的）技巧，技能。2. 手法〈如畫法，演奏法等〉。3. 方法。
  1. Technique of transmitting data via power line （ pl ） ， a new technique developed in recent years ， is used to automatize the free collecting system in public service and the management of uptown service 。 this article discussed the advantage ， disadvantage and the current state of the power line carrier communication 。 the advantage ， method and current state of using spread spectrum technique in power line communication are discussed 。 then the characteristic of low voltage power network was also compendious analyzed 。 in this paper ， after introducing the principle of ssc ， design of hardware and software of the system are been discussed 。 this system has been put into use ， the result has proved its high stability and reliability

    本文研究旨在提供一種利用低壓電力供電網路、低成本、高可靠地實現公共事業收費自動化和小區物業管理智能化的技術應用。討論了電力線載波通信的優、缺點及現狀，擴頻技術在電力線載波通信應用的優點、方式和現狀，並對低壓電力線網路的特性進行了簡單的分析。在闡述了擴頻通信的基本原理的基礎上，本文詳細地介紹了電力載波遠程抄表系統的具體實現，包括硬體模塊和管理軟體本系統已投入運行，具有較高的穩定性和可靠性。
  2. The thesis analyzes the transmitting characteristic of the uwa channel, derives the propagation losses, eigenrays and channel impulse responses of uwa channel by use of the kraken normal wave mode and the ray trace algorithm based on velocity - depth curvilinear profile approximation. based on the analysis, a scheme of auto - replying lduwarc system by means of spread spectrum technique has been designed

    論文首先分析了遠程聲遙控通道傳輸特性，分別利用kraken簡正波和射線跟蹤模型對深海和淺海水聲通道的傳輸特性進行分析，對通道的多徑結構、衰落和環境噪聲進行了計算，並在此基礎上設計了基於擴頻技術的自主應答式遠程聲遙控系統方案。
  3. 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。
  4. Because of using spread spectrum technique, phase - coded radar has good anti - jamming capability and low probability of intercept property. so more and more attention has been paid to the research on it for military and civil application

    相位編碼雷達採用擴頻技術使其具有良好的抗干擾能力和低截獲概率特性，因此在軍民兩用方面其研究日益受到人們的關注。
  5. The paper firstly analyses the fundamental principles of the direct sequence spread spectrum technique, the arithmetic in the frequency - domain by using the technology of the spectrum correlation adaptive filter

    本文首先就設計中選擇採用的直接序列擴頻技術、以及在頻域中實現直序擴頻信號中多窄帶干擾抑制的自適應演算法的基本原理做了分析。
  6. Cdma is a kind of advanced wireless spread spectrum technique

    碼分多址技術（ cdma ）是一種先進的無線擴頻技術。
  7. Then, introducing something about spread spectrum technique. and deciding to select direct - sequence spread spectrum ( ds ) in underwater acoustic communications by comparing ds to fh according to the properties of underwater acoustic channels. after that, discussing something about rake receiver, simulating the path - search algorithms, synchronization circuits and rake receiver in low speed underwater acoustic communications and analyzing some major factors influencing the performance of systems

    然後介紹了rake接收技術的基本原理，並對rake接收系統中的路徑搜索和同步系統進行了討論和模擬分析，另外還對rake接收技術在低速水聲通信系統中的應用作了模擬分析，並討論了一些影響rake接收系統性能的主要因素。
  8. Spread spectrum technique has been widely used in remote underwater acoustic communications recently

    近年來擴頻技術在水聲通信特別是遠程水聲通信中的使用越來越多。
  9. Clocking - circuit radiated disturbance and spread - spectrum technique

    時鐘電路輻射騷擾與擴頻技術
  10. Spread spectrum technique is brought forward originally in military communication for antijam and low probability of intercept. it ' s capability in security and antijam makes its expensive applications in the fields of communication and detection. application in multiple access communication techniques accelerates nowadays - 3g technique

    擴頻技術最早是在軍事通信中為了抗干擾和降低截獲概率而提出來的，它的保密、抗干擾性能使它在通信和探測領域得到廣泛的應用，擴頻技術應用於多址通信（碼分多址）使得當今的移動通信和3g通信等技術得以快速蓬勃的發展。
  11. These demand to develop a more reliable remote control system. based on the analysis of underwater acoustic ( uwa ) channel, this thesis designs an auto - replying lduwarc system by means of spread spectrum technique

    針對上述問題，本文在水聲通道分析的基礎上，設計了一種基於擴頻技術的自主應答式遠程聲遙控系統，系統著重考慮了系統的調制方式和自主應答的方式。
  12. Spread spectrum technique, which can handle variable adverse environments, exhibits unique qualities that have a number of advantages in anti - jamming, anti - noise, reduction of multi - path interference, low power spectral density, privacy, selective addressing and code division multiplexing

    擴頻通信技術具有優越的抗干擾、抗噪音、抗多徑衰落性能，能在低功率譜密度下工作，具保密性、可多址復用和任意選址，能有效克服各種惡劣的通道特性，目前廣泛應用於移動通信、雷達、導航、測距、電力線通信等領域。
  13. If we can apply the spread spectrum technique on power line, improve the quality of the power line carrier communication, make the better use of the existing power line resource, then we can resolve the channel - lacking problem and bring direct and considerable social economic benefit

    若能將擴頻技術用於電力線，提高電力線載波通信質量，使現有電力線資源物盡其用，從而尋求到一種高性價比的電力系統通信方案，這便能很好的解決電力系統中的通道緊缺問題，帶來直接而客觀的社會經濟效益。
  14. Spread spectrum technique can improve the robustness of watermarking

    擴頻技術應用於數字水印，可以提高水印的魯棒性。
  15. Then watermark will be embedded into the origin image in wavelet domain after be processed by spread spectrum technique

    然後採用擴頻技術將水印處理后在小波域中嵌入到載波圖像中。
  16. Adopting spread spectrum technique, it can reduce emission power and achieve high precision location offshore

    應用擴頻技術，可以大大降低對發射功率的要求，實現海上的高精度導航定位。
  17. Spread spectrum technique has been widely used in military and civilian communications for its advantages, such as anti - jamming ( aj ) and low probability of detection ( lpd )

    擴頻技術由於其具有抗干擾、隱蔽性好等優點，廣泛應用於軍事和民用通信系統中。
  18. Chapter two demonstrates the performances of spread spectrum technique systematically. then the working principle of direct sequence spread spectrum ( dsss ) model is introduced, and the interference immunity properties are particularly discussed

    第二章對擴頻通信技術的性能進行了系統分析，介紹了直接序列擴頻方式通信系統模型的工作原理，詳細論述了該系統的抗干擾性能。
  19. Recently spread spectrum technique has been used widely in wireless data communication, cellular mobile communication, military communication and telemetry monitor system with resistance to interference, high usage of spectrum, resistance to multi - path fading, so investigators in communications field pay more attention to the technique, especially direct sequence spread spectrum ( dsss ) technique

    近年來，擴頻技術以其抗干擾能力強、頻譜利用率高、抗多徑等優越性能在無線數據通信、蜂窩移動通信、軍事通信以及遙測監控系統中獲得了廣泛的應用，並日益受到通信領域研究人員的重視，特別是直接序列擴頻技術（ dsss ） 。
  20. For image copyright protection, we propose a novel hybrid watermarking algorithm by thorough analysis of two classes of watermark embedding methods : one based on spread spectrum technique and the other one based on quantization technique

    針對圖像版權保護應用，我們對基於擴頻技術和基於量化技術的兩類水印嵌入方法進行了深入分析，綜合兩種水印嵌入方法的優點提出了一種新穎的混合盲水印演算法。
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