| 摘要 |
PROBLEM TO BE SOLVED: To easily detect a convolution peak signal by suppressing self- convolution while ensuring a band width of a signal. SOLUTION: In the case of taking correlation between a reference signal and a reception signal by using a surface acoustic wave convolver 11, power of the reference signal and the reception signal is distributed respectively by distributers 20a, 20b, each distributed power is delayed by delay devices 21a, 21b respectively, attenuated by attenuators 22a, 22b respectively, the phase of the attenuated power signal is inverted by inverters 23a, 23b, and the inverted signals are respectively coupled with the other remaining distributed signals not processed and directly given to couplers 24a, 24b respectively and the resulting coupled signals are given to input signal terminals of the surface acoustic wave convolver 11 so as to avoid occurrence of self-convolution in the surface acoustic wave convolver 11. |
