Method for demodulating signal
AssigneeNokia Corporation
InventorMarkku Kiviranta
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Abstract
The invention relates to a demodulator and a demodulation method for a TFM-modulated signal comprising symbols, the method comprising the steps of calculating an estimate for the symbols, determining an estimate for the phase shift, determining a modulation index estimate error using the phase shift and the symbol estimates and removing the estimated error from the modulation index estimate using the symbol estimates.
Claims13
A demodulation method for a TFM-modulated signal comprising symbols, the method comprising the steps of
- calculating an estimate for the symbols,
- determining an estimate for the phase shift,
- determining a modulation index estimate error using the phase shift and the symbol estimates,
- removing the estimated error from the modulation index estimate.
A demodulation method for a TFM-modulated signal comprising symbols, the method comprising the steps of
- receiving a signal sent from a transmitter at a receiver,
- calculating an estimate for the received symbols,
- determining an estimate for the phase difference of the phases used in the transmission of two consecutive symbols,
- determining a modulation index estimate error using the phase difference and the symbol estimates,
- removing the error estimated from the modulation index estimate.
A demodulator for a TFM-modulated signal comprising symbols, the demodulator comprising
- means for calculating an estimate for the symbols,
- means for determining an estimate for the phase shift,
- means for determining a modulation index estimate error using the phase shift and the symbol estimates, and
- means for removing the estimated error from the modulation index estimate.
A demodulator for a TFM-modulated signal comprising signals, the demodulator comprising
- means for receiving a signal sent from a transmitter,
- means for calculating an estimate for the received symbols,
- means for determining an estimate for the phase difference of the phases used in the transmission of two consecutive symbols,
- means for determining a modulation index estimate error using the phase shift and the symbol estimates, and
- means for removing the estimated error from the modulation index estimate.
Dependencies are inferred from the claim text.