Composite carrier extremely-weak signal differential capture method based on multiple correlators
The invention provides a composite carrier extremely-weak signal differential capture method based on multiple correlators. The method comprises the following specific steps: 1, carrying out differential processing on each subcarrier signal of an intermediate-frequency NSCC signal x (k); 2, carrying...
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| Format: | Patent |
| Sprache: | chi ; eng |
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| Zusammenfassung: | The invention provides a composite carrier extremely-weak signal differential capture method based on multiple correlators. The method comprises the following specific steps: 1, carrying out differential processing on each subcarrier signal of an intermediate-frequency NSCC signal x (k); 2, carrying out coherent integration filtering on the signal after differential processing; 3, carrying out pseudo code matching filtering on the signal after the NSCC coherent integration filtering; and 4, carrying out FFT spectrum analysis on the signal after pseudo code stripping. According to the method, multi-branch differential coherent integration is carried out by utilizing the DAM principle, local pseudo code reproduction design is carried out by utilizing the characteristics of the differentiatedcombined pseudo codes, and then pseudo code stripping is carried out, so that the signal-to-noise ratio of a processing channel is greatly improved, and NSCC extremely weak signal capture can be better realized.
本发明提供一种基于多相关 |
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