Matches in SemOpenAlex for { <https://semopenalex.org/work/W870880902> ?p ?o ?g. }
Showing items 1 to 34 of
34
with 100 items per page.
- W870880902 endingPage "31" @default.
- W870880902 startingPage "30" @default.
- W870880902 abstract "对移动网络连接需求的增加，导致 了无线局域网（ＷＬＡＮ）ＲＦ接口标准的建立。未经核准的２．４～２．５ＧＨｚ ＩＳＭ频段已被指定用于ＷＬＡＮ。表１示出在世界不同地域用于ＷＬＡＮ的频率分配。在美国，ＩＥＥＥ８０２．１１为ＷＬＡＮ规定了两个ＲＦ物理层接口：直接时序扩频（Ｄｉｒｅｃｔ Ｓｅｑｕｅｎｃｅ ＳｐｒｅａｄＳＰｅｃｔｒｕｍ——ＤＳＳＳ）和跳频扩频（Ｆｒｅｑｕｅｎｃｙ Ｈｏｐｐｅｄ Ｓｐｒｅａｄ Ｓｐｅｃｔｒｕｍ——ＦＨＳＳ）。 ＤＳＳＳ利用一种１１位Ｂａｒｋｅｒ码，对信息的每一位在单信道内进行扩频。ＩＥＥＥ标准分配了１１个信道，每个信道２２ＭＨｚ宽，在８３．５ＭＨｚ频段中心频率之间的间隔为５Ｍ" @default.
- W870880902 created "2016-06-24" @default.
- W870880902 creator A5019406526 @default.
- W870880902 date "2000-01-01" @default.
- W870880902 modified "2023-09-28" @default.
- W870880902 title "2.4—2.5GHz ISM频段WLAN用VCO设计" @default.
- W870880902 hasPublicationYear "2000" @default.
- W870880902 type Work @default.
- W870880902 sameAs 870880902 @default.
- W870880902 citedByCount "0" @default.
- W870880902 crossrefType "journal-article" @default.
- W870880902 hasAuthorship W870880902A5019406526 @default.
- W870880902 hasConcept C119599485 @default.
- W870880902 hasConcept C127413603 @default.
- W870880902 hasConcept C165801399 @default.
- W870880902 hasConcept C31258907 @default.
- W870880902 hasConcept C41008148 @default.
- W870880902 hasConcept C5291336 @default.
- W870880902 hasConceptScore W870880902C119599485 @default.
- W870880902 hasConceptScore W870880902C127413603 @default.
- W870880902 hasConceptScore W870880902C165801399 @default.
- W870880902 hasConceptScore W870880902C31258907 @default.
- W870880902 hasConceptScore W870880902C41008148 @default.
- W870880902 hasConceptScore W870880902C5291336 @default.
- W870880902 hasIssue "11" @default.
- W870880902 hasLocation W8708809021 @default.
- W870880902 hasOpenAccess W870880902 @default.
- W870880902 hasPrimaryLocation W8708809021 @default.
- W870880902 isParatext "false" @default.
- W870880902 isRetracted "false" @default.
- W870880902 magId "870880902" @default.
- W870880902 workType "article" @default.