spread-spectrum communications 中文意思是什麼

spread-spectrum communications 解釋
傳播光譜技術
  • 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。
  • communications : 溝通
  1. The spread spectrum communication with an aperiodic pn code and under strong man - made jammers has an important significance in military communications

    強人為干擾環境下的非周期擴頻碼的擴頻通信在軍事上具有重要的意義。
  2. 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。
  3. Research and implementation of spread spectrum communications with high processing gain

    高增益擴頻通信關鍵技術的研究與實現
  4. As a new communication mode, the spread spectrum communications are widely used in military communication, distance finding and precise position, because of its well multiaddress access, lowly capture probability, the excellent performance of anti - interference and secrecy

    擴頻通信作為新型的通信方式，以其優良的多址接入、低截獲概率特性、抗干擾特性和強保密性被廣泛應用於軍事通信、測距與精確定位。
  5. In modern communication, direct sequence spread spectrum communications was widely used in the fields of telemetering and telecontrol systems, because of low interception probability, its high noise resistance and good security

    在現代通信中，直接序列擴頻通信技術以其截獲概率低、抗干擾性強、保密性高等優點，在航天測控領域得到了廣泛的應用。
  6. 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。
  7. 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。
  8. According to the ideology of software radio theory, the realization of intermediate frequency ( if ) digitalized direct sequence spread spectrum ( dsss ) receiver is one of the focuses in dsss communications study. it is of great value to deploy narrowband interference ( nbi ) suppression techniques in if digitalized dsss receiver for commercial and military applications

    根據中頻數字化這一軟體無線電思想實現擴頻接收機是目前擴頻通信研究的熱點，在中頻數字化擴頻接收機體系結構內研究窄帶干擾抑制技術具有重要的商業和軍事應用價值。
  9. A novel nonstationary interference rejection technique in spread spectrum communications

    一種新的擴頻通信非平穩干擾抑制技術
  10. Simulations on the key technique of spread spectrum communications are studied here, according to the characteristic of lduwarc system, issues concerning pseudo - noise codes, spread spectrum method, correlation receiving and synchronization. we also design an error correction code for the system

    論文還對擴頻通信的關鍵技術進行了模擬研究，針對遠程聲遙控系統的特點，討論了擴頻碼、擴頻方式、相關接收和同步問題，同時討論了適合遠程聲遙控系統的糾錯編碼技術。
  11. 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。
  12. 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 ） 。
  13. High rate speech service option 17 for widebande spread spectrum communications systems

    寬帶頻譜擴展通信系統用高速語音服務選擇17
  14. The closed - form performance formulae of cck modulation are derived under awgn channel and rayleigh fading channel, whose validity is proved by simulations. multi - carrier wideband cdma architecture based on complete complementary codes spread ( ccc - cdma ) has high spectrum efficiency without mai theoretically, which meets the general requirements of b3g communications

    研究了高速無線局域網ieee802 . 11b中的基帶技術，特別是基於互補碼擴頻的cck調制，推導出其在高斯噪聲通道和在多徑衰落通道條件下的性能公式。
  15. Multicarrier wireless communications have been widely investigated in the past decades. recently, two - dimensional spread spectrum ( 2d - ss ) system has drawn a lot of attention because of its full utilization of spreading characteristics in the frequency domain and time domain. compared with multicarrier code division multiplex access ( mc - cdma ), 2d - ss system can effectively mitigate multiple access interference ( mai ) due to spreading in the time domain

    當前多載波無線通信技術得到了廣泛的研究，二維擴頻通信系統是近年來提出的新的擴頻通信方式，由於二維擴頻系統從時域和頻域上分別對數據信號進行頻譜擴展，因此它同時具有時域擴頻和頻率擴頻通信系統的特點，是對傳統的一維時域直接序列擴頻和多載波擴頻的推廣。
  16. 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。
  17. 2. the characteristics of pseudorandom spread spectrum sequence in the dsss / bpsk signal exhibit the essential difference between the dsss / bpsk signal and other conventional signals in communications

    2 . dsss / bpsk信號中擴頻偽隨機序列的特徵體現了dsss / bpsk信號與其它常規通信信號最明顯的區別。
  18. 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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