spread spectrum communication system 中文意思是什麼

spread spectrum communication system 解釋
擴展頻譜通信系統
  • 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。
  • communication : n. 1. 通訊，通知；交換；信息；書信，口信，通報。2. 傳達，傳授；傳播；傳染。3. 交通，交通機關；聯系，連絡（設備）。4. 【宗教】接受聖餐。
  • system : n 1 體系，系統；分類法；組織；設備，裝置。2 方式；方法；作業方法。3 制度；主義。4 次序，規律。5 ...
  1. Application study on low - voltage power line carrier wave spread spectrum communication system

    低壓電力線載波擴頻通信系統的應用研究
  2. The design of direct sequence spread spectrum communication system for data transmission

    直接序列擴頻數據通信系統的設計
  3. 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。
  4. In the spread spectrum communication system, the synchronization of receiver ' s persedo - noise ( pn ) code to the transmitter ' s pn code is such an important part that the whole system ca n ' t work at all without it

    在整個擴頻系統中，接收端對發端擴頻碼的捕獲和同步，是一項決定整個系統成敗的至關重要的技術。
  5. This paper mainly expounds the techniques of downconvertion and error connection encode in leo spread spectrum communication system

    本文主要研究在特種小衛星擴頻通信系統中的下變頻和糾錯編碼技術。
  6. In addition, hybrid spread - spectrum communication system is propitious to enhance anti - jamming performance of the system that is make up of direct sequence ( ds ) and frequency hopping ( fh ), and it can satisfy the require of anti - jamming of systems. it concentrate their virtue and overcome shortage in single spread spectrum style. this paper discusses the aspect in detail

    另外，將擴頻技術中應用最廣泛的兩項技術直序擴頻（ ds ）和跳頻（ fh ）結合在一起，構成混合擴頻通信系統，有利於提高系統的抗干擾性能，更能滿足系統抗干擾的要求，而且將跳頻系統和直擴系統的優點集中起來，克服了單一擴頻方式的不足。
  7. Direct - sequence spread spectrum communication system simulation

    直接序列擴展頻譜通信系統模擬
  8. Analysis of the simulation of direct sequence spread spectrum communication system

    直接序列擴頻通信系統誤碼率的模擬分析
  9. This paper emphasizes on surface acoustic wave ( saw ) devices used in spread spectrum communication system

    本文重點介紹了聲表面波器件在擴頻通訊系統中的應用。
  10. Spread - spectrum function of spread - spectrum communication system

    擴頻通信中的擴頻函數
  11. Analysis of processing gain in spread - spectrum communication system

    擴展頻譜通信系統處理增益的分析
  12. The designing of super - regenerative theory - based broadband receiver for direct - sequence spread - spectrum communication system

    通信系統中基於超再生技術的新型寬帶接收機的設計
  13. Ds / fh hybrid spread - spectrum communication system base on software radio is researched in theory. performance of the system is analyzed and evaluated in anti - jamming by software simulation. so it testify feasibility of the system

    本課題針對這方面作了詳細地討論，就基於軟體無線電技術的ds fh混合擴頻通信系統從理論方面進行了研究，通過模擬，對系統在抗干擾方面的性能作了分析，並進行了性能評估，從而驗證了系統的可行性。
  14. Application of stel - 2000a in a special spread spectrum communication system

    晶元在一種專用擴頻通信系統中的應用
  15. Also, an if spread spectrum communication system is designed which based on 1c spread spectrum transceiver stel - 2000a and other circuits, such as qpsk modulator, high speed adc and tms320f206

    並以stel - 2000a為主要晶元，配合qpsk調制器、 adc轉換器和tms320f206等外圍電路設計了一個直接序列擴頻通信系統。
  16. Secondly, we analyse the anti - jamming performance of coherent csk system and non - coherent dcsk system under a narrowband sine wave jamming, and analyse the performance of chaotic communication system under coexisting with a conventional spread spectrum communication system, such as direct - sequence spread spectrum ( ds - ss ) system

    其次，詳細分析了相干csk系統和非相干dcsk系統的抗窄帶正弦干擾能力，以及與傳統擴頻通信系統（以ds - ss為例）共存時，傳統擴頻通信系統對它們的影響。
  17. Downconvertion and error control system based on concatenated code are the critical part of the leo spread spectrum communication system, and are widely used in the communication system

    下變頻和基於級聯碼的差錯控制系統是該特種小衛星擴頻通信系統的關鍵部分，並且在通信系統中有著廣泛地應用。
  18. To assure that the hybrid ds - fh spread - spectrum communication mode has better capability of information safety and inference suppression, i bring forward a design scheme of ds - fh spread - spectrum communication system and solving effectively the crucial problem such as how to choose the user address, how to choose the hopping frequency and how to avoid the collision of the frequency which is used by different users at the same time

    為保證系統可靠、有效地工作，本文提出了一種ds - fh混合擴頻系統的設計方案，並且有效地解決了系統的用戶選址、頻率選擇和頻率碰撞等關鍵問題。通過系統設計模擬證實了ds - fh混合擴頻系統具有優于ds系統的抗干擾性能，並在一定程度上提高了系統的抗遠近效應能力。
  19. Simulation of the spread spectrum communication system based on matlab

    的擴頻通信系統模擬研究
  20. Choice and implement of pn sequence in spread spectrum communication system in asic chip ' s development

    擴頻通信晶元開發中偽隨機碼的選擇及實現
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