| 摘要 |
PROBLEM TO BE SOLVED: To reduce power consumption during data demodulation.SOLUTION: A radio communication device comprises: a local oscillator for generating a local signal; a first mixer for mixing an input binary phase continuous frequency-shift modulation signal and the local signal to generate a baseband signal; a first filter for removing undesired frequency components included in the baseband signal; a delay unit for delaying an output signal from the first filter by one symbol; and a detector for demodulating a phase- and frequency-shift modulation signal using the output signal from the first filter and an output signal from the delay unit. The modulation index m of the phase continuous frequency-shift modulation signal is a value represented by m=n+k, where 0<n<1, and k is an integer equal to 0 or more. The frequency of the local signal is a frequency shifted from the carrier frequency of the phase continuous frequency-shift modulation signal by a frequency corresponding to 0 or 1 of the phase continuous frequency-shift modulation signal.SELECTED DRAWING: Figure 1 |
