線路總衰減 的英文怎麼說
中文拼音 [xiànlùzǒngshuāijiǎn]
線路總衰減
英文
overall line attenuation- 線 : 名詞1 （用絲、棉、金屬等製成的細長的東西） thread; string; wire 2 [數學] （一個點任意移動所構成的...
- 路 : 1 （道路） road; way; path 2 （路程） journey; distance 3 （途徑; 門路） way; means 4 （條理） se...
- 總 : Ⅰ動詞（總括; 匯集） assemble; gather; put together; sum up Ⅱ形容詞1 （全部的; 全面的） general; o...
- 衰 : 衰動詞（衰弱） decline; wane
- 線路 : 1. [電學] circuit; line 2. [交通運輸] line; route
- 衰減 : attenuation; decay; damping; reduction; rejection; weakening; deamplification; dampening; dying o...
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System scheme of speech coding plus spread spectrum communication was presented based on a full analysis of noise characteristic, attenuation characteristic and impedance characteristic of low - voltage power line. spread spectrum carrier ( abbreviated as ssc ) technology is adopted to overcome problems existing in signal transmission over power line. high quality, low rate mbe compression algorithm was used to complete speech encoding and decoding
在對低壓電力線路的噪聲特性、衰減特性和阻抗特性三個方面充分分析的基礎上，本文提出一種語音編碼+擴頻傳輸的系統總體方案，採用擴頻載波（ spreadspectrumcarrier ，縮寫為ssc ）技術克服電力線傳輸信號存在的問題，採用語音合成質量高並具有較低碼率的mbe壓縮演算法完成語音信號的編解碼。This paper introduces some practicable way of eta, presents the principle of each method and compares their virtues and shortcomings. among them, the vca ( voltage controlled amplify ) becomes prominent for its good characteristics, such as wide output dynamic range, low nonlinear distortion, flat amplitude - frequency characteristics, high amplitude resolution
對衰減器的總體方案和實現方法作了全面的分析、並著重分析了電路設計和研製中的各個關鍵問題，如動態范圍，幅頻特性，相位特性，非線性失真等。According to the review and comparison of today ' s adsl test instruments, the author finds the lack of the traditional test methods and indicates that easy to use, versatility and extensible are crucial aspects to design an adsl test instruments. the author also bring up a new method, the adaptive test method which can be used to test the adsl ' s transmission characters on the whole band dynamically
通過對國內外現有adsl檢測設備的特點進行總結和比較之後，找出了傳統測試方法的不足之處，指出易用性、通用性和可擴展性是設計adsl測試儀表的關鍵，提出了新的adsl線路傳輸特性的檢測方案? ?使用自適應演算法實現對adsl整個頻段的衰減情況動態測量，並且在matlab上進行了模擬。
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