Method of Communicating and Associated Transmitter Using Coded Orthogonal Frequency Division Multiplexing (COFDM)
First Claim
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1. A method of communicating, which comprises:
- generating a coded orthogonal frequency division multiplexed (COFDM) communications signal as a plurality of subcarriers; and
turning ON and OFF selected subcarriers while also frequency hopping and spreading the selected ON subcarriers over the frequency domain based on a fixed or variable sample rate to reduce average power for enhanced Low Probability of Interception/Low Probability of Detection (LPI/LPD) and also allow for more transmit power within a spectral mask.
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Abstract
A system and method communicates and generates a Coded Orthogonal Frequency Division Multiplexed (COFDM) communications signal as a plurality of subcarriers. Selected subcarriers are turned ON and OFF while also frequency hopping and spreading the selected ON subcarriers over the frequency domain based on a fixed or variable sample rate to reduce average power for enhanced Low Probability of Interception/Low Probability of Detection (LPI/LPD) and also allow for more transmit power within a spectral mask.
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Citations
22 Claims
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1. A method of communicating, which comprises:
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generating a coded orthogonal frequency division multiplexed (COFDM) communications signal as a plurality of subcarriers; and turning ON and OFF selected subcarriers while also frequency hopping and spreading the selected ON subcarriers over the frequency domain based on a fixed or variable sample rate to reduce average power for enhanced Low Probability of Interception/Low Probability of Detection (LPI/LPD) and also allow for more transmit power within a spectral mask. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A transmitter, comprising:
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a circuit for generating a Coded Orthogonal Frequency Division Multiplexed (COFDM) communications signal as a plurality of subcarriers; and a circuit for turning ON and OFF selected subcarriers while also frequency hopping and spreading the selected ON subcarriers over the frequency domain based on a fixed or variable sample rate to reduce average power for enhanced Low Probability of Interception/Low Probability of Detection (LPI/LPD) and also allow for more transmit power within a spectral mask. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification