System employing dissipative pseudorandum dynamics for communica

Optical: systems and elements – Single channel simultaneously to or from plural channels – By partial reflection at beam splitting or combining surface

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359629, 359187, 359184, H04B 1004

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active

057293880

ABSTRACT:
An optical communication and/or measurement system includes a transmitter that modulates a pseudo-random noise signal with a message signal to produce a wideband signal for transmission. A receiver, which demodulates the wideband signal to recover the message signal, includes an "analog" feedback shift register ("AFSR") that reproduces the noise signal based on samples of the received signal. The AFSR is a generalization of a linear feedback shift register ("LFSR"). The AFSR is characterized by a function that agrees with the function that characterizes the LFSR, at the points at which that function is defined. The AFSR includes beam splitters that are spaced in accordance with the associated pseudorandom code. The AFSR's function has stable fixed points at integer values and unstable fixed points at half-integer values and, the stable fixed points act as attractors. The AFSR thus produces a sequence that relaxes to the nearest integer-valued sequence.
As long as the samples of received signal that are fed to the AFSR fall within the basins of attraction that surround the stable values, the AFSR can accurately determine the expected next state of the shift register. While this can be done explicitly, the AFSR merges the symbol parsing, acquisition, tracking and update rules into a simple governing equation. The AFSR will thus entrain and produce an optical binary-valued pseudo-random noise signal.

REFERENCES:
patent: 3705758 (1972-12-01), Haskai
patent: 4632518 (1986-12-01), Jensen
patent: 5291555 (1994-03-01), Cuomo et al.
patent: 5293425 (1994-03-01), Oppenheim et al.
patent: 5379144 (1995-01-01), Shirasaki
patent: 5457559 (1995-10-01), Saito et al.
Simon et al., "Spread Spectrum Communications Handbook", Ch. 5, pp. 262-305, McGraw-Hill, 1994.
Cuomo et al., "Synchronization of Lorenz-Based Chaotic Circuits with Applications to Communications", IEEE Transactions on Circuits and Systems-II, vol. 40, No. 10, Oct. 1993.
Cuomo et al., "Circuit Implementation of Synchronized Chaos with Applications to Communications", The American Physical Society, vol. 71, No. 1, Jul. 1993.
Wu et al., "A Simple Way to Synchronize Chaotic Systems With Applications to Secure Communication Systems", International Journal of Bifurcation and Chaos, vol. 3, No. 6, 1993.
Kevin M. Cuomo, "Synthesizing Self-Synchronizing Chaotic Systems, International Journal of Bifurcation and Chaos", vol. 3, No. 5, 1993.

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