| 摘要 |
PROBLEM TO BE SOLVED: To receive a desired wave in an optimal state by improving a signal-to-noise ratio even when signal intensity is low and interference occurs. SOLUTION: Observation signals by two or more sensors 1-1 to 1-n are sampled by a sampling section 10 and supplied respectively to a beam formation section 22 and an interference wave suppressing section 23. A beam formation section 22 outputs waveform data using an algorithm such as a DBF. The interference wave suppressing section 23 outputs waveform data using an adaptive NUL formation algorithm etc. The pieces of waveform data are input respectively to equivalent signal-to-noise ratio operation sections 31 and 32. The equivalent signal-to-noise ratio operation sections 31 and 32 operate equivalent signal-to-noise ratios respectively based on the pieces of waveform data. By comparing the respective equivalent signal-to-noise ratios operated, either output signal from the beam formation section 22 and the interference wave suppressing section 23 is selected to be output as a received signal. COPYRIGHT: (C)2008,JPO&INPIT
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