| 摘要 |
PURPOSE:To reduce power consumption by stopping the operation of a relevant reception circuit when a signal with a deteriorated data error rate is received, to reduce the data error rate due to inter-residual code interference and to improve the data error due to thermal noise. CONSTITUTION:A reference voltage Vref is set to a reception level of a data error rate to be expected, comparators 7-1, 7-2 compare it with outputs of intermediate frequency amplifiers 3-1, 3-2 and when the outputs of the intermediate frequency amplifiers 3-1, 3-2 are lower than the Vref, the operation of reception circuits A12-1, B12-2 is stopped, Inter-code interference calculation sections 6-1, 6-2 calculate an inter-code interference based on autocorrelation parameter of a preamble signal series included in the reception signal data and control selectors 9-1, 9-2 to select a branch with high inter-code interference or S/N and input the result to an equalization section 11. |
