A code division multiple access (CDMA) communication system in which cellular techniques are utilized in a wireless Private Branch Exchange (PBX) environment. A microcellular arrangement is defined in which a base station communicates user information signals using CDMA communication signals with subscriber...http://www.google.com.tw/patents/US5280472?utm_source=gb-gplus-share專利 US5280472 - CDMA microcellular telephone system and distributed antenna system therefor
