Title of Invention	A SYSTEM FOR MODULATING AN INFORMATION SIGNAL IN A SPREA SPECTURM COMMUNICATION SYSTEM
Abstract	A system for communicating information signals using spread spectrum communication techniques. PN sequences are constructed that provided othogonality between the users so that mutual interference will be reduced, allowing higher capacity and batter link performance. With orthogonal PN codes, the cross-corelation is zero over a predetermined time interval, resulting in no interference between the orthogonal codes, provided only that the code time frames are time aligned with each other. In an exemplary embodiment, signals are communicated between a cell site and mobile units using direct sequence spread spectrum communication signals. In the cell-to-mobile link, pilot, paging and voice channels are defined. Information communicated on the cell-to-mobile link channels are, in general, enclosed, interleaved, bi-phase of shift key (BSPK) Modulated with orthogonal of each BSPK symbol along with quartered shift key (QPSK).

Title of Invention

A SYSTEM FOR MODULATING AN INFORMATION SIGNAL IN A SPREA SPECTURM COMMUNICATION SYSTEM

Abstract

A system for communicating information signals using spread spectrum communication techniques. PN sequences are constructed that provided othogonality between the users so that mutual interference will be reduced, allowing higher capacity and batter link performance. With orthogonal PN codes, the cross-corelation is zero over a predetermined time interval, resulting in no interference between the orthogonal codes, provided only that the code time frames are time aligned with each other. In an exemplary embodiment, signals are communicated between a cell site and mobile units using direct sequence spread spectrum communication signals. In the cell-to-mobile link, pilot, paging and voice channels are defined. Information communicated on the cell-to-mobile link channels are, in general, enclosed, interleaved, bi-phase of shift key (BSPK) Modulated with orthogonal of each BSPK symbol along with quartered shift key (QPSK).

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Patent Number

179893

Indian Patent Application Number

479/MAS/1991

PG Journal Number

30/2009

Publication Date

24-Jul-2009

Grant Date

18-Sep-1998

Date of Filing

25-Jun-1991

Name of Patentee

M/S. QUALCOMM INC

Applicant Address

10555 SORRENTO VALLEY ROAD, SAN DIEGO, CA 92121,

Inventors:

#	Inventor's Name	Inventor's Address
1	KLEIN S GILHOUSEN	4039 CALGARY AVENUE, SAN DIEGO, CA 92122,
2	IRWIN M JACOBS	2710 INVERNESS CT., LA JOLLA, CA 92037,
3	ROBERT PADOVANI	12634 FUTURA ST., SAN DIEGO, CA 92130,
4	LINDSAY A WEAVER JR	3419 TONY DR., SAN DIEGO, CA 92122,
5	CHARLES E WHEATLEY III	2208 CAMINITO DEI BARCO, DEL MAR. CA 92014,
6	ANDREW J VITERBI	2712 GLENWICK PLACE LA JOLLA, CA 92037,

PCT International Classification Number

H03B 29/00

PCT International Application Number

N/A

PCT International Filing date

PCT Conventions:

#	PCT Application Number	Date of Convention	Priority Country
1			NA