Propagation path presumption manner and device, and propagation path presumption system

摘要

PROBLEM TO BE SOLVED: To demodulate an information signal normally by demodulating a reference signal and an insert signal which are received in time series, finding a 1st and a 2nd correlation value, estimating a data component of the insert signal through specific operation, removing the data component, generating a pseudo reference signal in the absence of the insert signal and estimating transmission line characteristics using the pseudo reference signal. SOLUTION: A pilot symbol correlator 11 of a propagation path estimating device 10 is supplied with a spread code from a spread code generation part 12 which generates the specific spread code to find the correlation value between a base-band receive signal BB and the spread code. From the output terminal of the pilot symbol correlator 11, correlation values in an N-symbol section FE are supplied, symbol by symbol, to an N-symbol addition part 13 and a TPC correlation value is supplied to a TPC bit data decision part 14. Further, symbols of the base band receive signal BB are supplied over the overall time width of a pilot channel including symbols in the N-symbol section FE and a TPC bit section TE.