PURPOSE: To improve the disturbing wave suppressing performance by using a reference signal having a strong correlation with a desired signal so as to suppress a desired signal component in a reception signal of an auxiliary antenna and then by using the suppressed component so as to suppress a disturbing wave in a reception signal of a main antenna.
CONSTITUTION: A reference signal generating circuit 15 generates a reference signal having a center frequency of the desired signal to be received by the main antenna. The 1st signal processing circuit 14 consists of a correlation circuit 7 taking the correlation between the reference signal and an output of a difference circuit 6, a weight circuit 4 multiplying the correlation output and the reference signal, and a subtraction circuit 6 subtracting the output of the weight circuit 4 from the reception signal of the auxiliary antenna 12, and only the disturbing wave component where the reference signal, i.e., the desired signal component is suppressed is outputted to the 2nd signal processing circuit 13. The 2nd signal processing circuit 13 uses the signal having the disturbing wave component so as to suppress only the disturbing wave component in the reception signal of the main antenna. Thus, even if the incoming direction of the desired signal is unknown, the desired signal component is received with a good efficiency.
MOROOKA TASUKU
UENO MOTOHARU
