| 摘要 |
A receiving apparatus eliminating the need for performing at all times a function provided for a mode (64QAM) that is most susceptible to deterioration in accuracy in adaptive modulation communication. In a spread spectrum communication system according to the present invention, a control unit (104) reads a demodulating method from a control signal specifying the demodulating method (QPSK, 16-QAM, or 64-QAM), and on the basis of the read demodulating method, the control unit controls a sampling rate of an A/D conversion unit (111) and a despreading unit (102), a number of pilot symbols used by a propagation path estimating unit (106), and a number of pilot symbols despread by the despreading unit (102). Thereby, when the demodulating method is other than 64-QAM, the sampling rate and the like adjusted to QPSK or 16-QAM can be set, and thus the function provided for 64-QAM does not need to be performed at all times. <IMAGE> |
