Apparatus and method for modulation and demodulation using frequency selective baseband
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.
Electronics and Telecommunications Research Institute
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In Gi Kyung Soo Chang Hee Duck Gun Jae Hoon Sung Eun Jung Bum Hyung II Sung Weon Jin Kyung Ki Hyuk Jung Hwan Tae Wook
Lim Kim Hyoung Park Shim Kim Kim Park Kang Kim Park Hwang Kang