Pulse or digital communications – Spread spectrum – Frequency hopping
Reexamination Certificate
2005-03-08
2005-03-08
Tran, Khai (Department: 2634)
Pulse or digital communications
Spread spectrum
Frequency hopping
C375S135000
Reexamination Certificate
active
06865215
ABSTRACT:
A digital data communication overlay system is disclosed which is overlaid on a predefined frequency band of an existing analog data communication system. The digital data communication overlay system comprises a digital mobile unit and a digital ground station. The digital mobile unit and the digital ground station are configured to transmit and receive spread spectrum digital data communication signals between each other over the same spread spectrum digital channel. This is done by spreading the spread spectrum digital data communication signals over the predefined frequency spectrum of the existing analog data communication system.
REFERENCES:
patent: 5689273 (1997-11-01), Bailey et al.
patent: 5703874 (1997-12-01), Schilling
patent: 5737358 (1998-04-01), Ritz et al.
patent: 5995043 (1999-11-01), Murphy
patent: 6026277 (2000-02-01), Gavrilovich
patent: 6131013 (2000-10-01), Bergstrom et al.
patent: 6275518 (2001-08-01), Takahashi et al.
patent: 6334047 (2001-12-01), Andersson et al.
patent: 6490257 (2002-12-01), Watanabe et al.
patent: 6549784 (2003-04-01), Kostic et al.
Matolak, D.W., CDMA for Communications in the Aeronautical Environment, 10/97, AIAA/IEEE, 16th Digital Avionics Systems Conference, p. 21-28.*
Wang, J., “Cellular CDMA Overlay Systems”,IEEE Proceedings on Communications, vol. 143, Dec., pp. 389-395, 1996.
Wang, J., and Milstein, L.B., “CDMA Overlay Situations for Microcellular Mobile Communications”,IEEE Transactions-on-Communications, vol. 43, Feb./Mar./Apr., pp. 603-614, 1995.
Wei, P., Zeidler, J.R., and Ku, W.H., “Adaptive Interference Suppression for CDMA Overlay Systems”, IEEE J. Selected Areas in Communications, vol. 12, No. 9, Dec., pp. 1510-1523, 1994.
Ketchum, J.W., and Proakis, J.G., “Adaptive Algorithms for estimating and suppressing Narrowband Interferes in PN Spread Spectrum Systems”,IEEE Trans. on Communications, vol. COM-30, May, pp. 913-924, 1982.
Hsu, F.M., and Giordano, A.A., “Digital Whitening Techniques for Improving Spread Sectrum Communications Performance in the Presence of Narrowband Jamming and Interference”,IEEE Transactions-on-Communications, vol. COM-26, Feb., pp. 209-216, 1978.
Li, L., and Milstein, L.B., “Rejection of Narrowband Interference in PN Spread Systems Using Transversal Filters”, IEEE Transactions-on-Communications, vol. COM-30, May, pp. 925-928, 1982.
Iltis, R.A., and Milstein, L.B., “Performance Analysis of Narrowband Interference Rejection Techniques in DS Spread Spectrum Systems,”IEEE Transactions-on-Communication, vol. COM-32. Nov., pp. 1169-1177, 1984.
Hageman Michael L.
Russell Steve F.
Dorsey & Whitney LLP
Iowa State University & Research Foundation, Inc.
Lugo David B.
Tran Khai
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