| 摘要 |
<p>A method and an apparatus are disclosed for improving the anti-jam performance of a processing circuit to increase conversion gain and reduce small signal suppression resulting from processing a phase modulated input signal accompanied by jamming interference. Input signals are each segregated into signal chips by a matched filter (23), and by an adaptive threshold circuit (13) in accordance with a predetermined relative threshold. The threshold is said to repeatedly distinguish a predetermined number of signal chips having greater signal amplitude. The absolute amplitude threshold level may, therefore, vary in accordance with the particular signal chips forming each input signal segment. A phase quantizer (29) operates to extract phase information from the signal chips. A phase correlator (15) operates to apply a first weighting gain factor to signal chips equal to or exceeding the threshold, and a second weighting gain factor to the remaining chips, the first weighting gain factor being greater than the second weighting gain factor.</p> |
