| 摘要 |
PROBLEM TO BE SOLVED: To provide a technique for detecting a mode and a guard length for OFDM (Orthogonal Frequency Division Multiplexing) transmission and estimating a timing offset.SOLUTION: The technique disclosed includes: evaluating multiple hypotheses for variously different combinations of a mode and a guard length in OFDM transmission, calculating a correlation evaluation result for each hypothesis and determining an energy of a guard length; deriving a first metric based on the correlation evaluation result and the energy; applying filter processing by equalization to the first metric; estimating a noise based on a set of elements of the first metric applied with the filter processing in a position determined by a timing offset estimated for each hypothesis; deriving a second metric based on the first metric applied with the filter processing and the estimated noise; and using the second metric to all hypotheses to determine a mode, a guard length, and a timing offset for OFDM transmission. |
