M-ary orthogonal keying system

Details M-ary orthogonal keying system M-ary orthogonal keying system

2011-06-07

2011-06-07

Harper, Kevin C (Department: 2462)

Multiplex communications

Generalized orthogonal or special mathematical techniques

C370S480000

Reexamination Certificate

active

07957256

ABSTRACT:
A digital modulation system provides enhanced multipath performance by using modified orthogonal codes with reduced autocorrelation sidelobes while maintaining the cross-correlation properties of the modified codes. For example, the modified orthogonal codes can reduce the autocorrelation level so as not to exceed one-half the length of the modified orthogonal code. In certain embodiments, an M-ary orthogonal keying (MOK) system is used which modifies orthogonal Walsh codes using a complementary code to improve the auto-correlation properties of the Walsh codes, thereby enhancing the multipath performance of the MOK system while maintaining the orthogonality and low cross-correlation characteristics of the Walsh codes.

REFERENCES:
patent: 4353067 (1982-10-01), Mims
patent: 4434499 (1984-02-01), Motsch et al.
patent: 5151702 (1992-09-01), Urkowitz
patent: 5862182 (1999-01-01), Awater et al.
patent: 6404732 (2002-06-01), van Nee
patent: 7583582 (2009-09-01), van Nee
Agere Claim Construction Brief—Agere Systemsv.Intersil Corporation—Federal District Court (Delaware), Civil Action No. 02-1544-JJF.
Intersil Opening Brief on Claim Construction—Agere Systemsv.Intersil Corporation—Federal District Court (Delaware), Civil Action No. 02-1544-JJF.
Plaintiff's Original Complaint for Patent Interference—Agere Systemsv.Sony Corporation, et al., U.S. District Court, Eastern District of Texas, Marshall Division, Case No. 2:06-CV-00079-TJW.
Plaintiff's First Amended Complaint for Patent Infringement—Agere Systemsv.Sony Corporation, et al., U.S. District Court, Eastern District of Texas, Marshall Division, Case No. 2:06-CV-00079-TJW.
Defendant Sony Computer Entertainment America Inc.'s Answer and Counterclaim To Plaintiff's First Amended Complaint for Patent Infringement—Agere Systemsv.Sony Corporation, et al., U.S. District Court, Eastern District of Texas, Marshall Division, Case No. 2:06-CV-00079-TJW.

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