Zero intermediate-frequency demodulator
A zero intermediate-frequency (IF) demodulator includes a pair of mixers receiving a quadrature local oscillator signal, for converting the FM-modulated input signal to an in-phase I baseband signal and a quadrature-phase Q baseband signal; each I and Q signal is then delayed and the I and Q signals...
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| Format: | Patent |
| Sprache: | eng |
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| Zusammenfassung: | A zero intermediate-frequency (IF) demodulator includes a pair of mixers receiving a quadrature local oscillator signal, for converting the FM-modulated input signal to an in-phase I baseband signal and a quadrature-phase Q baseband signal; each I and Q signal is then delayed and the I and Q signals and the delayed Id and Qd signals are arithmetically processed to generate first and second modulation-related signals, which are summed to provide the recovered modulation as an output signal. The arithmetic processing may use additive and/or multiplicative operations. |
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