| 摘要 |
<P>PROBLEM TO BE SOLVED: To securely receive a desired wave signal by securely removing a disturbance wave signal included in a reception signal with relatively simple constitution in a radio receiver. <P>SOLUTION: A receiving unit 100 of the radio receiver 500 has a main antenna 1 and a disturbance wave receiving antenna 2, a subtraction processing unit 3 to which signals are input from the antennas 1 and 2, etc. The subtraction processing unit 3 inputs the reception signal received by the antenna 1 and the signal received by the disturbance wave receiving antenna 2. The disturbance wave receiving antenna 2 is configured to have a signal receivable frequency band close to a desired frequency of the desired wave signal, and the disturbance wave receiving antenna 2 receives only a disturbance frequency close to the desired frequency. The subtraction processing unit 3 inverts the phase of the disturbance wave signal received by the disturbance wave receiving antenna 2 and adds the phase-inverted signal, and then subtracts the disturbance wave signal from the reception signal. The subtraction processing unit 3 outputs only the desired wave signal having the disturbance wave signal removed. <P>COPYRIGHT: (C)2008,JPO&INPIT |
