| 摘要 |
PROBLEM TO BE SOLVED: To reduce bit errors.SOLUTION: A base band signal Smaintains a level within a bit period Tp when a bit is a first value, and is encoded so as to perform level transition within the bit period Tp when the bit is a second value. An oversampling circuit 10 samples the base band signal Sby a clock signal CK having a clock cycle Tck=Tp/M and generates a first data sequence S1. A change point detection circuit 20 asserts a second data sequence S2 for one clock period Tck when a bit change occurs to the oversampled first data sequence S1. A stretch circuit 30 expands a period in which the second data sequence S2 is asserted by N multiple and generates a third data sequence S3. The sampling circuit 40 generates demodulation data Sshowing a value displayed by respective bits included in the base band signal Son the basis of the third data sequence S3. |
