Apparatus and method for classifying modulations in multipath environments
First Claim
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1. A method for use in a receiver, the method comprising:
- determining a maximum fluctuation range (MFR) from a normalized fourth-order cumulant of a received signal;
classifying a modulation type of the received signal as a function of the determined MFR; and
setting a demodulator to a corresponding one of at least two demodulation modes in accordance with the modulation type to process the received signal.
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Abstract
A receiver supports a single carrier (SC) form of modulation and a multi-carrier form of modulation such as orthogonal frequency division multiplexing (OFDM). Upon receiving a signal, the receiver determines a maximum fluctuation range (MFR) as a function of at least a fourth-order cumulant of a received signal; and classifies a modulation type of the received signal as a function of the determined maximum fluctuation range. After determining the modulation type of the received signal, the receiver switches to that modulation mode to recover data from the received signal.
12 Citations
18 Claims
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1. A method for use in a receiver, the method comprising:
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determining a maximum fluctuation range (MFR) from a normalized fourth-order cumulant of a received signal; classifying a modulation type of the received signal as a function of the determined MFR; and setting a demodulator to a corresponding one of at least two demodulation modes in accordance with the modulation type to process the received signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. Apparatus comprising:
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a demodulator for providing at least two demodulation modes for processing a received signal; and a processor for determining a modulation type of the received signal from a normalized fourth-order cumulant of the received signal and for setting the demodulator to a corresponding one of the demodulation modes in accordance with the determined modulation type, wherein the processor operates to (a) determine a maximum fluctuation range (MFR) from the normalized fourth-order cumulant of the received signal, and (b) classify the modulation type of the received signal as a function of the determined MFR. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification