| 摘要 |
PROBLEM TO BE SOLVED: To improve the speed of signal processing by decoding a complex symbol signal string based on time from the output of an output starting time to the output of a pilot signal. SOLUTION: An FFT(fast Fourier transformation) part 13 outputs an output start signal ϕS each time of starting the output of a pair of complex symbol signal strings. A pilot signal detecting part 16 gives a signal ϕP showing the detection of a pilot signal to AFC(automatic frequency controller) 18. AFC 19 gives a signal ϕ19 according to the frequency deviation within a carrier interval to NCO(numerical controlling oscillator) 21. An FFT part 13 compensates only frequency deviation within carrier frequency interval. An enable signal generation part 1 receives a signal ϕ18 showing the frequency deviation of a carrier interval unit from AFC 18 and after the elapse of time according to frequency deviation from the input of the signal ϕS, gives the enable signal ϕE of a fixed pulse width. |
