spread spectrum communication 中文意思是什麼

spread spectrum communication 解釋
擴頻通信
  • 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。
  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. 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
  3. An icr - based spread spectrum communication with arbitrary rate

    的任意傳輸速率擴頻通信系統
  4. Frequency - hopping ( fh ) is a novel spread spectrum communication technique, which develops very fast in military field due to its lpi / lpd ( low probability of intercept / detection ) properties and immunity against interferences, the extensive application of hf ( high frequency ) frequency - hopping radios in military has greatly enhanced the ability of military equipments against jamming and interception and brought up a new austere challenge for communication countermeasures

    跳頻通信具有良好的抗干擾性，低截獲概率及組網能力，因此跳頻技術的一出現，便在軍事領域得到了極大的發展，採用跳頻技術的短波電臺在軍事通信中得到了廣泛應用，極大地提高了軍事裝備的抗截獲和抗干擾能力，向通信對抗提出了嚴峻的挑戰。
  5. Firstly, a power line spread spectrum communication scheme was brought out and then it was simulated in system simulation software. system view. with the simulation, the detail design parameter came out

    首先是提出了一種電力線擴頻通信方案，然後利用系統模擬軟體systemview對其進行模擬分析，最後按照vlsi設計流程詳細說明了該晶元的設計過程。
  6. 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。
  7. 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
  8. 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。
  9. One method of transmitting physiological data throughwireless spread spectrum communication

    通過擴頻通訊實現生理數據無線傳輸
  10. The design of pn code synchronization should find a trade - off between the performance and the complexity of the reciever. in this paper, the pn code synchronization technique in spread spectrum communication is introduced

    本論文首先介紹擴頻系統中採用的pn碼同步技術，然後結合wcdma上行鏈路的特點，提出適合wcdma上行鏈路的擴頻碼同步方案。
  11. 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。
  12. 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。
  13. A system scheme of digital image collection plus spread spectrum communication ( abbreviated as ssc ) is presented in this paper after a full analysis of noise characteristics, attenuating characteristics and impedance characteristics of low - voltage power lines

    本文首先介紹了低壓電力線的噪聲特性、衰減特性和阻抗特性，然後提出一種數字圖像採集+擴頻傳輸的系統總體方案。
  14. 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。
  15. 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。
  16. 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。
  17. The spread spectrum communication ’ s availably jamming becomes the key to get the electronic war ’ s victory, so it is very important to research the effectiveness of jamming and interference referred to the direct sequence spread spectrum ( ds - ss ) communication system

    為取得現代電子戰的勝利，對擴頻通信的有效干擾成為關鍵。因此，研究直接序列擴頻通信干擾效能具有重要的現實意義。
  18. Based on the analysis of vhf - rc, the method of applying chaos direct sequence spread spectrum communication ( cds - ssc ) to ahts has been studied and discussed in this thesis. in this method, cds - ssc, which combines chaos sequences ( cs ) of high rand quality with ds - ss excelling in resisting interferences, is used to realize the transmission of hydrologic data

    文中所述方法利用混沌直接擴頻通信的通信方式來實現水文數據的傳輸，即將隨機性能較強的混沌序列作為擴頻碼與抗干擾性較強的直接擴頻通信相結合，應用於水文自動測報系統中去。
  19. The mobile multimedia communication system need to support the transmission of high - speed data and variable speed data compared with the ordinary spread spectrum communication. the data rate ranges from several kbps to hundred kbps for wide up to 2mbps. in order to assure different data rate to transmission in the same spread spectrum bandwidth, we need to use different lengths and orthogonal pn codes

    傳統移動通信系統所提供的數據速率一般只有幾kbps ，而移動多媒體通信所要求的數據速率范圍為幾mbps甚至幾十mbps ，在同一擴頻系統內傳輸多媒體的擴頻比也不一樣，就要採用不同長度的偽碼，而且偽碼之間必須保證正交性或準正交性。
  20. Aiming at the problem of intercepting the direct sequence spread spectrum communication signal, this paper makes full use of the wave characteristic of base - band signal after it is applied to shaping filter is made, and an algorithm which is based on the average power serial is given

    摘要針對直接序列擴頻通信信號的偵察問題，充分利用擴頻基帶信號發送成型濾波后的波形特點，提出了一種基於最大平均功率序列的演算法。
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