|국가/구분||United States(US) Patent 등록|
|국제특허분류(IPC7판)||H04B-015/00 H04K-001/00 H04L-027/30|
|미국특허분류(USC)||375/200 ; 380/09 ; 380/043|
|발명자 / 주소|
|출원인 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 102 인용 특허 : 13|
Users or subscribers of a multi-user communications system, such as a spread spectrum communications system, provide signals to the central station or base unit of that system, and receive signals therefrom. Avoidance of interference among those users' signals is needed to ensure proper operation of the system. To do so, the data of each user is individually scrambled to randomize the data that different users are transmitting, in order to improve tracking performance at a receiver. The data of each user is scrambled independently, in a manner unique to ...
[ What is claimed is:] [18.] A communication system, comprising:at least one base unit having a transmitter and a receiver;a plurality of subscriber units, each of said plurality of subscriber units having a transmitter and a receiver;scrambling control circuitry for providing scrambling patterns which uniquely identify each of said plurality of subscriber units;means within at least one of said base unit and said plurality of subscriber units for scrambling an information signal with one of said scrambling patterns which identifies one of said plurality...