| 摘要 |
<p>The inventive device for detecting electromagnetic signals comprises a phase reception antenna with N radiating elements (1) and comprising M reception channels (2, 3) downstream from the reception antenna, M being less than N, the aiming directions of said antenna, equal in number to the number N of radiating elements being obtained by beamforming by computation and being regularly spaced apart, said device comprises at least: - switching means (61) for the M reception channels on the radiating elements according to successive sequence cycles, M radiating elements being connected to said reception channels at each sequence, a same so-called reference radiating element being connected to said reception channels for all of the sequences, a cycle being completed when all of the radiating elements have been connected at least once to one of said reception channels; - processing means (63) estimating, for each sequence, the spatial correlations two by two of the signal received on the reference channel and the signals received on the other M-1 reception channels, then estimating the spatial power spectral density in N incoming directions from a coherent sum of the N correlation terms thus obtained.</p> |
