| 单词 | spread spectrum | 
| 释义 | > as lemmasspread spectrum   spread spectrum  n. Telecommunications the transmission of a signal over a wider bandwidth than is necessary, typically by varying its frequency or phase transition; frequently attributive. ΚΠ 1953    Trans. IRE Professional Group Communications Syst. 1 132/1  				The signal acquisition process includes the search for the PN code epoch (for spread-spectrum signals). 1990    InfoWorld 30 Apr. Target ed. S3/2  				Like many forms of military and space research, work done on spread-spectrum radio has proved to be applicable in civilian situations. 2005    A. Goldsmith Wireless Communications xiii. 403  				Spread spectrum is a technique that increases signal bandwidth beyond the minimum necessary for data communication. < as lemmas  | 
	
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