Reverse diffusion - Gyakukakusan

Japanese: 逆拡散 - ぎゃくかくさん
Reverse diffusion - Gyakukakusan

...At the receiver, the received signal (4) is multiplied by a reference signal modulated with the same code sequence (5) as the transmitter, and then the signal is converted to an intermediate frequency. This process is called despreading. The intermediate frequency signal (6) is a signal modulated only by information, so the information can be restored by demodulating it in the usual way. ...

*Some of the terminology used to refer to "de-diffusion" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…受信機では,(4)の受信信号に,送信側と同じ符号系列(5)で変調された参照信号を掛け,中間周波に落とす。この過程を逆拡散という。中間周波信号(6)は,情報のみによって変調された信号であるので,通常の方法で復調すれば情報が復元される。…

※「逆拡散」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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