| 摘要 |
PURPOSE:To attain small size, light weight, low cost and to reduce power consumption. CONSTITUTION:An input signal is converted into a base band signal for each channel at a separation conversion part 19, sampled at carrier correction circuits 221-22m in a clock timing to correct a deviation of a carrier with respect to a reference signal. Each base band signal is received by a common arithmetic section 31 for an input initial state and the part 31 detects instantaneous power of each channel and a sampling point minimizing a variance of each sample point of the instantaneous power is used for a clock timing. Then the channel is sampled in the clock timing to detect a phase error and a frequency and phase deviation with respect to a reference frequency and phase, the clock timing is set to a clock recovery circuit in a carrier correction circuit of a corresponding channel and a frequency deviation and a phase deviation are set to a local oscillator respectively. |
