guard channel 中文意思是什麼

guard channel 解釋
備用波道
  • guard : n 1 警衛；警戒；看守。2 防衛者；看守者；哨兵，衛兵，〈集合詞〉警衛隊；〈the G 〉 （英國等的）皇家...
  • channel : n 1 水路，水道，渠，溝；海峽；河床，河底。2 （柱等的）槽，凹縫；【機械工程】槽鐵，凹形鐵。3 〈比...
  1. The hardware in this system includes a digital signal processor, an analogy input channel, a lcd, an analogy output path, a keyboard input part, a guard circuit and a logic control circuit

    該系統硬體包括數字信號處理器晶元、前向輸入通道、液晶顯示器、模擬量輸出部分、鍵盤輸入部分、保護電路部分和邏輯控制部分。
  2. To guard against abuses, customs officers had selected passengers passing through the green channel, based on risk management, for baggage examination at a customs clearance cubicle

    為防止濫用情? ，海關人員會根據風險管理在綠通道抽選旅客到海關清關室查驗行李。
  3. And pays emphasis on analyzing the system structure and system flow, the core techniques, the channel characteristic and parameters of dvb - t system. the system adopts some core techniques such as cofdm, a lot of tps ( transmission parameter signalling ) insert and guard interval, and so on. so it can withstand high - level ( up to odb ), long delay static and dynamic multipath distortion

    論文首先描述了數字電視地面廣播的需求條件，技術難點和目前存在的問題，並重點分析了dvb - t系統結構流程，核心技術及系統通道特性和參數，該系統採用了cofdm （編碼正交頻分多路復用） ，大量導頻信號插入和保護間隔技術等核心技術，使之能抵抗高電平（ 0db ） ，長延時的靜態和動態多徑失真，有利於數字和模擬電視的混合傳輸，它的多載波調制模式功能和性能在移動和便攜接收、同頻網等方面具有獨特的優勢。
  4. Referring to the self - guard mechanism of g. 729, characteristics of rs coding and scdma channel, a scheme using rs ( 7, 5 ) coding with crc and block interleaving is put forward and its effectiveness is verified by both pesq algorithm and subjective test at the end of chapter 4

    結合g . 729自身保護機制、縮短rs編碼和scdma通道的特點，提出了基於rs （ 7 ， 5 ）碼帶crc檢錯及幀內交織的保護方案。並在第四章末採用pesq演算法驗證了該保護方案的有效性。
  5. The second channel is a transponder with no guard. it can be used in the relay communication system and can be composed into a data platform with remote control if additional terminal equipment is added. its application in other systems is also discussed

    而乙機通道是一個無人職守的轉發器通道，除了直接可用於接力通信系統中外，如果增添適當終端設備還可構成具有遙控功能的數據報告平臺，論文給出了本防撞雷達射頻通道應用在其它系統中的實例。
  6. To increase the spectrum efficiency of the ofdm system, a novel aofdm ( adaptive ofdm ) system, which can change its modulation type and length of guard interval according to the estimated channel information, is designed

    為了提高ofdm的頻譜效率，我們設計了一個能根據通道特徵動態改變其調制方式以及保護間隔的自適應ofdm （ aofdm ， adaptiveorthogonalfrequencydivisionmultiplexing ）系統。
  7. Later, simulates the ofdm system by matlab software, researchs the effect about ofdm system by mapping, guard interval, sub - carrier and channel

    然後通過matlab軟體對ofdm系統進行了模擬分析，研究了調制映射，保護間隔，子載波和通道對ofdm系統的影響，並得出了一些結論。
  8. With the development of dsp chip techniques and the introduction of some mature techniques, such as fft / ifft, the application of 64 / 128 / 256 qam in high - speed modem, tcm, adaptive channel equalization, the insertion of guard interval and so on, people are starting to focus on the application of ofdm in the field of mobile communications

    隨著dsp晶元技術的發展，傅立葉變換反變換、高速modem採用的64 128 256qam技術、柵格編碼技術、軟判決技術、通道自適應技術、插入保護時段、減少均衡計算量等成熟技術的逐步引入，人們開始集中越來越多的精力開發ofdm技術在移動通信領域的應用。
  9. However, to the essential of communication technology, those techniques are all change in transmission medium or channel. recently, because of the development of dsp, ifft / fft, 46 / 128 / 256qam using in high - speed modem, and gradual introduction of new coding technique, soft decision technique, channel self - adapting, guard interval, ofdm ( orthogonal frequency division multiplexing ) arouse more and more attention. as a technology of high - speed transmission, ofdm can resist isi effectively

    近年來，隨著dsp晶元技術的發展，傅立葉變換反變換、高速modem採用的64 128 256qam技術、柵格編碼技術、軟判決技術、通道自適應技術、插入保護時段、減少均衡計算量等成熟技術的逐步引入，正交頻分復用ofdm （ orthogonalfrequencydivisionmultiplexing ）作為一種可以有效對抗信號波形間干擾的高速傳輸技術，引起了廣泛關注。
  10. Some new conclusions have been reached through the research : as a main information channel, an important social support and social pressure source and a decision - making reference system, the rpg is an essential elementary of agricultural technology communication ; the rpg members have gradational opinion status and different communication resources and effects ; opinion leader is the core of the rpg ' s inner communication as well as the information medium and the final checkup guard man between the group and outer environment ; rural secondary group ( rsg ) ' s influences on prg are realized by opinion leader

    在此基礎上，筆者得出了以下結論：初級群體是農業科技傳播的主體和基礎，是農民獲取信息的主要渠道之一，也是社會支持、社會壓力的重要來源和決策的重要參照體系；意見領袖是初級群體內部傳播的核心，是外部信息進入群體的中介和把關人，也是其他成員決策的重要參照；次級群體對初級群體的影響主要通過意見領袖實現。
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