頻譜擴展因數 的英文怎麼說
中文拼音 [bīnpǔkuòzhǎnyīnshǔ]
頻譜擴展因數
英文
spectrum spreading factor- 頻 : Ⅰ形容詞(次數多) frequent Ⅱ副詞(屢次) frequently; repeatedly Ⅲ名詞1 [物理學] (物體每秒鐘振動...
- 譜 : 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)...
- 擴 : 動詞(擴大) expand; enlarge; extend
- 因 : Ⅰ動詞[書面語] (沿襲) follow; carry on Ⅱ介詞1 [書面語] (憑借; 根據) on the basis of; in accord...
- 數 : 數副詞(屢次) frequently; repeatedly
- 頻譜 : frequency spectrum; frequency content; spectrum; power density spectrum; power spectrum; [系統] s...
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Multicarrier wireless communications have been widely investigated in the past decades. recently, two - dimensional spread spectrum ( 2d - ss ) system has drawn a lot of attention because of its full utilization of spreading characteristics in the frequency domain and time domain. compared with multicarrier code division multiplex access ( mc - cdma ), 2d - ss system can effectively mitigate multiple access interference ( mai ) due to spreading in the time domain
當前多載波無線通信技術得到了廣泛的研究,二維擴頻通信系統是近年來提出的新的擴頻通信方式,由於二維擴頻系統從時域和頻域上分別對數據信號進行頻譜擴展,因此它同時具有時域擴頻和頻率擴頻通信系統的特點,是對傳統的一維時域直接序列擴頻和多載波擴頻的推廣。
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