Apparatus and method for modulation and demodulation using...

Modulators – Frequency modulator

Reexamination Certificate

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C329S315000, C375S146000, C375S147000

Reexamination Certificate

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07961061

ABSTRACT:
Provided are modulation and demodulation methods and apparatuses using a frequency selective baseband. The frequency modulation method includes: generating a plurality of subgroups by dividing 2N (N is a real number) spread codes used for frequency spreading into 2M (M<N, M is a real number) spread codes; selecting P(P is a real number) subgroups among the generated subgroups; acquiring P spread codes by inputting M data bits to each of the p subgroups so as for 1 spread code to be selected among the 2M spread codes of each subgroup; and selecting dominant value among the acquired P spread codes to generate transmitting data including the dominant value. Accordingly, it is possible to increase a processing gain of the entire system, to increase a transmission data rate, and to reduce power consumption of the system.

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T. G. Zimmerman, “Personal Area Networks: Near-field intrabody communication”, IBM System Journal, 1996, pp. 609-617, vol. 35, Nos. 3 & 4.
International Search Report for PCT/KR2008/002036 filed Apr. 11, 2008.
Written Opinion of the International Searching Authority for PCT/KR2008/002036 filed Apr. 11, 2008.

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