…For this reason, research has recently been focused on wired communication rather than wireless communication. Spread spectrum communication includes DS (direct sequence), FH (frequency hopping), TH (time hopping), pulse FM, and hybrid. In DS, FH, and TH, the carrier wave is modulated by both the information and the high-speed code sequence. … *Some of the terminology that refers to the "FH method" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…そのため,最近は,無線通信よりも有線通信における利用に研究の中心が移っている。スペクトル拡散通信には,DS(direct sequence)方式,FH(frequency hopping)方式,TH(time hopping)方式,パルスFM方式,ハイブリッド方式などがある。 DS,FH,THなどの方式では,情報と高速の符号系列の両方によって搬送波に変調が掛けられる。… ※「FH 方式」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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