Frequency search device and frequency search realization method
The invention discloses a frequency search device and a frequency search realization method. The frequency search device comprises a low pass filter and/or a down sampling unit; the low pass filter and/or the down sampling unit are/is connected with a frequency mixer of a frequency search circuit fo...
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| Format: | Patent |
| Sprache: | chi ; eng |
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| Zusammenfassung: | The invention discloses a frequency search device and a frequency search realization method. The frequency search device comprises a low pass filter and/or a down sampling unit; the low pass filter and/or the down sampling unit are/is connected with a frequency mixer of a frequency search circuit for receiving frequency mixing signals and outputting the frequency mixing signals completing low pass filtering and/or down sampling processing to a correlator of the frequency search circuit; or, the low pass filter and/or the down sampling unit are/is connected with the correlator of the frequency search circuit for receiving correlation result signals and outputting the frequency mixing signals completing low pass filtering and/or down sampling processing to the correlator of the frequency search circuit. According to the method of the invention, the frequency search circuit is processed through the low pass filter and/or the down sampling unit, and the Fourier transform processing complexity degree is reduced.
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