| 摘要 |
PROBLEM TO BE SOLVED: To provide a transmitter-receiver in which transmission and reception are attained simultaneously even when a transmission signal and a reception signal have a strong correlation at the same frequency by providing a prescribed filter means. SOLUTION: Pre-filters 10a, 10b are notch filters of the same characteristic to eliminate a strong correlation component between a transmission signal Io and a desired signal S and between an interference signal I and the desired signal S. An adaptive filter means 6a has a coefficient variable filter 7a receiving an output signal of the pre-filter 10a and a filter coefficient calculation means 9 obtaining a filter coefficient of the coefficient variable filter 7a minimizing a square mean of a difference signal between an output signal of the pre- filter 10b and an output signal of the coefficient variable filter 7a. A filter means 6b has a coefficient variable filter 7b using a filter coefficient of the coefficient variable filter 7a outputting a pseudo signal Ir of the interference signal I and a subtractor means 8b sending a difference signal between a reception signal S+I and a pseudo signal Ir of the interference signal I as an input signal of the receiver 5. |
