Patent ID: 8488648

Claim:
A symbol-error correction frequency modulation method using a frequency selective baseband, comprising: generating a plurality of subgroups by dividing 2 N (N is a real number) spread codes or orthogonal codes used for frequency spreading into 2 M (M<N, M is a real number) spread codes or orthogonal codes; selecting (P+L) (P and L are real numbers) subgroups among the generated subgroups; acquiring P spread codes by inputting M data bits to each of the selected P subgroups so as to select one spread code among the 2 M spread codes of each subgroup; generating L*M parity bits for symbol error correction by using P*M data bits input to the selected P subgroups; selecting one spread code among the 2 M spread codes of the L subgroups by inputting the L*M parity bits to the L subgroups; and selecting dominant values among the (P+L) spread codes acquired from the (P+L) subgroups to generate transmitting data including the dominant values.