Secure modulation and demodulation
First Claim
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1. A transmitter for securely transmitting a signal, including:
- an input interface for receiving the signal; and
a nonlinear keying modulator configured to encrypt the signal using a nonlinear keying modulation technique;
wherein the nonlinear keying modulator encrypts the signal using a nonlinear filter that comprises a plurality of linear filters, the nonlinear filter having stability that is controllable by adjusting the plurality of linear filters.
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Abstract
A system and method are disclosed for securely transmitting and receiving a signal. A nonlinear keying modulator is used in the transmitter to encrypt the signal using a nonlinear keying modulation technique. A nonlinear keying demodulator is used in the receiver to decrypt the signal.
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Citations
38 Claims
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1. A transmitter for securely transmitting a signal, including:
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an input interface for receiving the signal; and a nonlinear keying modulator configured to encrypt the signal using a nonlinear keying modulation technique; wherein the nonlinear keying modulator encrypts the signal using a nonlinear filter that comprises a plurality of linear filters, the nonlinear filter having stability that is controllable by adjusting the plurality of linear filters. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A receiver for decrypting a securely transmitted signal, including:
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an input interface for receiving the signal; and a nonlinear keying demodulator configured to decrypt the signal using a nonlinear keying demodulation technique; wherein the nonlinear keying demodulator decrypts the signal using a nonlinear filter that comprises a plurality of linear filters, the nonlinear filter having stability that is controllable by adjusting the plurality of linear filters. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
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Specification