| 摘要 |
<p>PURPOSE:To make a device compact and improve the design freedom of the device by detecting the phase difference of input signals, inputted to plural antenna elements, among the respective antenna elements, and using this phase difference as a phase correction table. CONSTITUTION:An input signal having passed each antenna element 1 and each A/D converter 2 is once stored in each memory 10A. Since an interference signal outputted from an ECM 15 exists in a rear field, phase difference is generated at the input time to each element 1. An antenna element correlative processor 13 performs the correlative processing of an optional reference antenna element S (phase difference 0) and the elements 1 other than the element S using the input signal data in the memory 10A so as to compute phase difference information on the element S, that is, computes the mutual correlative value (real parts and imaginary parts) of the element S and other elements 1 so as to be able to compute the phase difference of the other elements 1 around the element S as the center using the mutual correlative value. The phase difference information thus extracted is used as a phase correction table 4A (internal preparation), and phase correction is performed by a phase corrector 3.</p> |
