Symbol duration dithering for secured chaotic communications
First Claim
1. A method for communicating a sequence of information symbols between a transmitter and a receiver using a chaotic sequence spread spectrum signal, the method comprising:
- randomly selecting a threshold symbol energy value for each of said information symbols;
dynamically varying a number of chips from a first chaotic sequence which are to be used to encode each of said information symbols into a signal, based at least on said threshold symbol energy value;
transmitting said signal comprising said sequence of information symbols and having a dynamically varying symbol energy, said information symbols encoded into said signal using said first chaotic sequence generated at said transmitter;
extracting said sequence of information symbols from said signal, said information symbols extracted using a second chaotic sequence generated at said receiver,wherein said first and said second chaotic sequences are identical and synchronized in time and frequency.
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Accused Products
Abstract
A system for communicating a sequence of information symbols using a chaotic sequence spread spectrum signal. The system includes a transmitter (402) for transmitting a signal including the information symbols, the information symbols encoded into the signal using a first chaotic sequence of chips generated at the transmitter. The system also includes a receiver (404) configure to receive the signal and extract the information symbols from the signal, the information symbols extracted using a second chaotic sequence of chips generated at the receiver. In the system, the first and the second chaotic sequences are identical and synchronized in time and frequency, each of the sequence of symbols is associated with a randomly generated threshold symbol energy value, and the portion of chips in the first and the second chaotic sequences associated with each of the plurality of information symbols is selected based on the associated threshold symbol energy value.
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Citations
24 Claims
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1. A method for communicating a sequence of information symbols between a transmitter and a receiver using a chaotic sequence spread spectrum signal, the method comprising:
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randomly selecting a threshold symbol energy value for each of said information symbols; dynamically varying a number of chips from a first chaotic sequence which are to be used to encode each of said information symbols into a signal, based at least on said threshold symbol energy value; transmitting said signal comprising said sequence of information symbols and having a dynamically varying symbol energy, said information symbols encoded into said signal using said first chaotic sequence generated at said transmitter; extracting said sequence of information symbols from said signal, said information symbols extracted using a second chaotic sequence generated at said receiver, wherein said first and said second chaotic sequences are identical and synchronized in time and frequency. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A system for communicating a sequence of information symbols using a chaotic sequence spread spectrum signal, the system comprising:
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a transmitter configured to randomly select a threshold symbol energy value for each of said information symbols; dynamically vary a number of chips from a first chaotic sequence which are to be used to encode each of said information symbols into a signal, based on said threshold symbol energy value; transmit said signal comprising said sequence of information symbols and having a dynamically varying symbol energy, said information symbols encoded into said signal using said first chaotic sequence generated at said transmitter; and a receiver configured to receive said signal and extract said sequence of information symbols from said signal, said information symbols extracted using a second chaotic sequence generated at said receiver, wherein said first and said second chaotic sequences are identical and synchronized in time and frequency. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification