Pulse or digital communications – Spread spectrum
Reexamination Certificate
2005-09-27
2010-10-12
Ahn, Sam K (Department: 2611)
Pulse or digital communications
Spread spectrum
Reexamination Certificate
active
07813409
ABSTRACT:
Described are a method and system for secure transmission of data through a network. A subcarrier sequence for data transmission is generated. The subcarrier sequence designates at least one subcarrier from a number of orthogonal subcarriers for each of a plurality of intervals in a time sequence. The subcarrier sequence is provided to a receiver. A data signal that includes the subcarriers identified in the subcarrier sequence modulated according to the data is transmitted from a transmitter to the receiver. For additional security, the subcarrier sequence can be transmitted to the receiver using a communications channel that is separate from the communications channel for the data signal. The data signal is detected at the receiver and demodulated according to the subcarrier sequence.
REFERENCES:
patent: 2005/0002324 (2005-01-01), Sutivong et al.
patent: 2005/0094597 (2005-05-01), Hwang et al.
patent: 2005/0220002 (2005-10-01), Li et al.
patent: 2006/0023666 (2006-02-01), Jalali et al.
patent: 2006/0128323 (2006-06-01), Fujimoto
Kwong Herman
Parlor Bryan
Soh Kah Ming
Wyrzykowska Aneta
Ahn Sam K
Guerin William G
Guerin & Rodriguez LLP
Nortel Networks Limited
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