Mobile communication system

Details Mobile communication system Mobile communication system

1997-03-25

2000-05-09

Nguyen, Chau

Multiplex communications

Communication over free space

Having a plurality of contiguous regions served by...

370350, 375145, 455436, H04B 7216

Patent

active

060613386

ABSTRACT:
In a mobile communication system, a mobile station located in an area using an analog system receives information for synchronization from a base station situated in the above area. On moving from the area using an analog system to an area using a CDMA (Code Division Multiple Access) area, the mobile station acquires a pilot channel from a base station located at the CDMA area. For this purpose, the mobile station generates a phase set signal on the basis of the information received in the analog system area. The phase set signal resets an I-phase and a Q-phase spread code generator included in a serial search acquisition circuit for acquiring the pilot channel. As a result, spread codes output from the spread code generators are causes to coincide in phase with a spread code used to spread a signal being received over the pilot channel. This allows the mobile station to acquire the pilot channel in the CDMA system area in an extremely short period of time.

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