無位移譜線 的英文怎麼說

中文拼音 [wèixiàn]
無位移譜線 英文
stationaryline
  • : 無Ⅰ動詞(沒有) not have; there is not; be without Ⅱ名詞1 (沒有) nothing; nil 2 (姓氏) a surn...
  • : Ⅰ名詞1 (所在或所佔的地方) place; location 2 (職位; 地位) position; post; status 3 (特指皇帝...
  • : Ⅰ動詞1. (移動) move; remove; shift 2. (改變; 變動) change; alter Ⅱ名詞(姓氏) a surname
  • : Ⅰ名詞[書面語]1 (按類別或系統編成的書或冊子等) table; chart; register 2 (指導練習的格式或圖形)...
  • : 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...
  1. These fixed lines have been called stationary lines.

    這兩條固定不動的叫做無位移譜線
  2. This paper introduce the status and fuction of radio monitor in the radio spectrum management at first, and explain radio monitoring center build every specification requirement put forward to national radio monitoring system, at the sam time, the paper analyses the radio interferece, examineto error, the comprehensive pain of design of monitoring system of handling, combining the actual proposition hi our province

    本文首先對電監測在電頻管理中的地作用和職能作了介紹,闡述了國家電監測中心對全國電監測系統建設提出來的各項技術要求,並從理論上就在電系統建設中需解決的電干擾,測向誤差,電磁兼容等問題作了分析。然後結合我省電管理工作的實際提出了搬式綜合監測系統的設計方案。
  3. Firstly, in wireless environment, receiver has no know the time delay between transmitter and itself. in ofdm system, ofdm data is transmitted as one symbol, so in order for correct demodulation, the correct start of symbol should be got from ofdm system to reduce the effect of isi. secondly, the high frequency utilization in ofdm is based on the orthogonal properties of sub carriers. if frequency offset is generated, the orthogonal properties among sub carriers will lost, that will cause inter carrier interference ( ici ) and high ber of system

    Ofdm技術也存在著一些缺陷,首先,在環境中傳輸的ofdm信號對定時要求高,為了減少碼間串擾( isi )影響,必須從接收信號中提取出正確的符號起始;其次, ofdm系統對頻率偏敏感, ofdm技術的高頻利用率和傳輸可靠性均以子載波的正交性為基礎,如果接收機和發射機之間發生頻率偏,子載波之間就會失去正交性,導致嚴重的子載波間干擾( ici ) ,降低系統性能。
分享友人