CDMA Communication system and method

Details CDMA Communication system and method CDMA Communication system and method

1997-07-07

1999-07-27

Patel, Ajit

Multiplex communications

Communication over free space

Having a plurality of contiguous regions served by...

370342, 375200, 375358, H04B 7216

Patent

active

059302445

ABSTRACT:
In CDMA communications, a base station detects a difference between a reference phase of a spreading code and a phase of a received signal of each terminal station, and feeds a phase jump signal PJ-i representative of the phase difference back to each terminal station. After timing acquisition, the reception operation is performed using the reference phase, and a shift amount between the phase of a received signal and the reference phase is fed back to each terminal station as phase synchronization control information PC-i. Each terminal station coarsely adjusts the phase of the spreading code in accordance with the phase jump signal PJ-i, and thereafter finely adjusts the phase of its transmitting signal in accordance with the phase synchronization control information PC-i. It is therefore possible to synchronize the phases of the signals transmitted from terminal stations and received at the base station. Accordingly, an orthogonal code is used for spreading on the reverse links.

REFERENCES:
patent: 5103459 (1992-04-01), Gilhousen et al.
patent: 5228053 (1993-07-01), Miller et al.
patent: 5235615 (1993-08-01), Omura
patent: 5267260 (1993-11-01), Lee
patent: 5499236 (1996-03-01), Giallorenzi et al.
patent: 5533012 (1996-07-01), Fukasawa et al.
patent: 5583853 (1996-12-01), Giallorenzi et al.
patent: 5619492 (1997-04-01), Press et al.
patent: 5652764 (1997-07-01), Kanzaki et al.
patent: 5663956 (1997-09-01), Schilling
patent: 5675608 (1997-10-01), Kim et al.
patent: 5691974 (1997-11-01), Zehavi et al.
patent: 5694388 (1997-12-01), Sawahashi et al.
patent: 5703874 (1997-12-01), Schilling
patent: 5764630 (1998-06-01), Natali et al.

Affiliated with

Also associated with

Rating

CDMA Communication system and method does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with CDMA Communication system and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and CDMA Communication system and method will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-887501