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US 12,574,271 B2Granted
Frequency shift keying (FSK)-modulated signal discrimination
AssigneeIntel Corporation
InventorsAli Montazeri, Jinyong Lee
Life of this patent
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Abstract
A receiver, including: a sampling circuit configured to convert a received analog signal into a digital signal; a variance determination circuit configured to determine a phase difference variance of the digital signal; and a frequency shift keying (FSK) discrimination circuit configured to discriminate, based on the phase difference variance, whether the received analog signal is an FSK-modulated signal.
Claims25
A receiver, comprising:
- a sampling circuit configured to convert a received analog signal into a digital signal;
- a variance determination circuit configured to determine a phase difference variance of the digital signal, wherein the phase difference variance is an average of squared deviations of phase differences from a mean;
- and
- a frequency shift keying (FSK) discrimination circuit configured to discriminate, based on the phase difference variance, whether the received analog signal is an FSK-modulated signal by comparing the phase difference variance to a noise phase difference variance threshold.
1 more element
A method, comprising:
- converting, by a sampling circuit, a received analog signal into a digital signal;
- determining, by a variance determination circuit, a phase difference variance of the digital signal, wherein the phase difference variance is an average of squared deviations of phase differences from a mean;
- and
- discriminating, by a frequency shift keying (FSK) discrimination circuit, based on the phase difference variance, whether the received analog signal is an FSK-modulated signal by comparing the phase difference variance to a noise phase difference variance threshold.
1 more element
A receiver, comprising:
- a sampling means for converting a received analog signal into a digital signal;
- a variance determination means for determining a phase difference variance of the digital signal, wherein the phase difference variance is an average of squared deviations of phase differences from a mean;
- and
- a frequency shift keying (FSK) discrimination means for discriminating based on the phase difference variance, whether the received analog signal is an FSK-modulated signal by comparing the phase difference variance to a noise phase difference variance threshold.
1 more element
Dependencies are inferred from the claim text.