CDMA modem using common block architecture

Details CDMA modem using common block architecture CDMA modem using common block architecture

1998-12-04

2002-09-24

Kizou, Hassan (Department: 2662)

Multiplex communications

Communication over free space

Combining or distributing information via code word channels...

C370S209000, C370S328000, C370S335000

Reexamination Certificate

active

06456611

ABSTRACT:

FIELD OF THE INVENTION
This invention pertains to modems, particularly to modems for use in CDMA (Code Division Multiple Access) radio systems, and most particularly to modems able to function in any of several different generations or standards of CDMA radio systems.
BACKGROUND OF THE INVENTION
CDMA radio systems are well known. See, generally, CDMA
Cellular Mobile Communications and Network Security
, Dr. Man Young Rhee, Prentice Hall 1998, ISBN 0-13-598418-1.
Currently,“second generation” CDMA systems, often referred to in the art as “2G” systems, governed by standard TIA/EIA/IS-95, hereinafter“IS-95”, are widely used. The third generation of CDMA systems, such as cdma2000 and UMTS UTRA systems are being introduced as a extensions of IS-95 systems.
Each of those three systems has to date required the use of different terminals or base stations for different air interface standards. This results in great inconvenience to consumers and burdens the service providers with extra operating costs.
There is thus a need to provide CDMA equipment that can function under each of the IS-95, UMTS UTRA, and cdma2000 standards.
It is thus an object of the present invention to provide an efficient soft modem architecture that can accommodate third generation (cdma2000, UMTS UTRA) and one second generation (IS-95) standards.
It is a further object of the present invention to provide a CDMA modem that is configurable over a broad range of uses.
It is a further object of the present invention to provide a CDMA modem definable by software.
SUMMARY OF THE INVENTION
In accordance with the teachings of the present invention, these and other objects may be accomplished by the present systems and methods in a modem configurable to operate in a variety of environments each representing a different air interface standard. An embodiment of the present invention includes a method of CDMA communication comprising configuring the components of a modem which are common to the cdma2000, UMTS UTRA, and IS-95 air interface standards as hard-wired components, and configuring the components unique to each of those air interface standards as software-configurable components. Another embodiment of the present invention comprises a modem with hard-wired circuitry to perform functions common to those three air interface standards and software-configurable elements to perform functions unique to any of those three air interface standards.


REFERENCES:
patent: 5511067 (1996-04-01), Miller
patent: 5623485 (1997-04-01), Bi
patent: 5659569 (1997-08-01), Padovani et al.
patent: 5999815 (1999-12-01), TenBrood et al.
patent: 6088347 (2000-07-01), Minn et al.
patent: 6173006 (2001-01-01), Kent et al.
patent: 6175588 (2001-01-01), Visotsky et al.
Knisely et al., Evolution of wireless Dant Services: IS-95 to cdma2000 Oct. 1998, Lucent Technologies, (IEEE Communications Magazine pp. 140-149).*
Carr, A., Development and trials for W-CDmA infrastructure Nov. 1998, Telecom MODUS Ltd, (1998 The Institution of Electrical Engineers. Printed and published by the IEE, Savoy Place, London WC2R OBL, UK.).

Affiliated with

Also associated with

Rating

CDMA modem using common block architecture 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 modem using common block architecture, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and CDMA modem using common block architecture will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2869203