Pulse or digital communications – Spread spectrum – Frequency hopping
Reexamination Certificate
2004-03-26
2009-08-18
Fan, Chieh M. (Department: 2611)
Pulse or digital communications
Spread spectrum
Frequency hopping
C375S149000
Reexamination Certificate
active
07577182
ABSTRACT:
An input receiving section102of a transmitter apparatus101receives inputs of multiple synchronized signals r1, . . . , rN, an asynchronizing section103outputs multiple asynchronized signals v1, . . . , vNthat are obtained by delaying the multiple synchronized signals r1, . . . , rNby time t1, . . . , tN, a modulating section104modulates the multiple output asynchronized signals v1, . . . , vNto output modulated signal w1, . . . wL(1≦L≦N), a transmitting section105transmits the output modulated signal w1, . . . wL, and the delay time t1, . . . , tNis shorter than a reciprocal number of a minimum value of clock rates of the multiple input received synchronized signals r1, . . . , rN, and is desirably proportional to one generated by a chaos random number in particular.
REFERENCES:
patent: 6377611 (2002-04-01), Hwang
patent: 6587452 (2003-07-01), Davidovici et al.
patent: 6624767 (2003-09-01), Shiu et al.
patent: 2002/0136277 (2002-09-01), Reed et al.
Chaotic Signals for Multiple Access Communications, Department of Electrical Engineering, Tel-Aviv University, Tel-Aviv 69978, Mar. 1995.
Aghdam Freshteh N
Fan Chieh M.
Honigman Miller Schwartz & Cohn LLP
National Institute of Information and Communications Technology
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