公开(公告)号：US5815525A

公开(公告)日：1998-09-29

申请号：US622812

申请日：1996-03-27

申请人： Douglas G. Smith ,  Robert C. Dixon ,  Jeffrey S. Vanderpool

发明人： Douglas G. Smith ,  Robert C. Dixon ,  Jeffrey S. Vanderpool

IPC分类号： H04B1/40 ,  H04B1/69 ,  H04B1/707 ,  H04B7/26 ,  H04L1/00 ,  H04K1/00 ,  H04L27/04 ,  H04L24/06

CPC分类号： H04B1/0057 ,  H04B1/005 ,  H04B1/006 ,  H04B1/406 ,  H04B1/69 ,  H04B1/707 ,  H04B7/2634 ,  H04L1/0001 ,  H04B2201/7071 ,  H04L1/0002

摘要： A technique for spread-spectrum communication which uses more than one mode and more than one frequency band. Selectable modes include narrowband mode and spread-spectrum mode, or cellular mode and microcellular mode. Selectable frequency bands include both licensed and unlicensed frequency bands, particularly frequency bands including the 902-928 MHz, 1850-1990 MHz, and 2.4-2.4835 GHz frequency bands. Spread-spectrum communication channels are 10 MHz or less in width. The frequency band onto which spread-spectrum signals are encoded may be changed upon a change in environment or other control trigger, such as establishment or de-establishment of communication with a private access network.