Patent ID: 7593531

Claim:
A method for transmitting and receiving a digital message having N digits, each of said N digits having any one of M values, in a system wherein each of said M values k corresponds with a kth-second chaotic signal generator associating with a kth-second chaotic algorithm, and is transmitted within a bit period as a chaotic signal comprising a first chaotic signal and a second chaotic signal, the bit period being divided into a first portion and a second portion, the method including the steps of: (i) generating the first chaotic signal from a first chaotic signal generator by a first chaotic algorithm, and transmitting the first chaotic signal in the first portion of the bit period; (ii) selecting the corresponding kth-second chaotic signal generator; (iii) feeding the first chaotic signal to the kth-second chaotic signal generator to generate the second chaotic signal, and transmitting the second chaotic signal in the second portion of the bit period; and (iv) receiving the first and second chaotic signals at a receiver, the receiver being adapted to execute a demodulating algorithm for demodulating the received first and second chaotic signals including the step of separating, via a switch, the received first and second chaotic signals which have been transmitted within each single bit period, and processing the separated first and second chaotic signals to generate the transmitted value k.