Codes for spread spectrum applications generated using chaotic dynamical systems

Broomhead, D. S.; Huke, J. P.; Muldoon, Mark

doi:10.1080/026811199282100

Cited by 27 publications

(5 citation statements)

References 5 publications

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“…In both cases, the sequences from chaotic maps were quantized and truncated so that the sequences were actually periodic. Broomhead et al have shown another method of generating spreadspectrum sequences from UPO's [26].…”

Section: General Approachmentioning

confidence: 98%

Spread-spectrum sequences from unstable periodic orbits

Carroll

2000

IEEE Trans. Circuits Syst. I

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I find that it is possible to use the unstable periodic orbits (UPO's) from a chaotic system to approximate a chaotic signal from that system. The UPO's are used to create possible sequences of motion for the chaotic system, and these possible sequences are then compared to a noise-contaminated chaotic signal to determine which possible sequence is the best estimate for the noise-free signal. The comparison process has some similarity to CDMA.Index Terms-CDMA, Chaos, spread spectrum.

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Section: General Approachmentioning

confidence: 98%

Spread-spectrum sequences from unstable periodic orbits

Carroll

2000

IEEE Trans. Circuits Syst. I

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“…This map is able to produce a variety of distinct sequences for different users, by just changing the initial states and/or its bifurcation parameter. The proposed algorithm in [12] uses locally-generated chaotic codes to spread transmitted signals on the available bandwidth, which guarantees secure protection against eavesdropping (as packets can only be decoded with the 6 proper chaotic code, which depends on the secret initial conditions/seed), transmitter-receiver self-synchronization, and good auto-and cross-correlation properties [26].…”

Section: Introductionmentioning

confidence: 99%

In-Network Collaboration for CDMA-Based Reliable Underwater Acoustic Communications

Rahmati

Petroccia

Pompili

2019

IEEE J. Oceanic Eng.

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Achieving high throughput and reliability in underwater acoustic networks for transmitting distributed and large volume of data is a challenging task due to the bandwidth-limited and unpredictable nature of the acoustic channel. In a multi-node network, such as in the Internet of Underwater Things (IoUT), communication link efficiency varies dynamically: if the channel is not in good condition, e.g., when in deep fade, channel coding techniques may fail to deliver the information even with multiple retransmissions. Hence, an efficient and agile collaborative strategy is required to allocate appropriate resources to the communication links based on their status. The proposed solution adjusts the physicaland link-layer parameters collaboratively for a Code Division Multiple Access (CDMA)-based underwater network. An adaptive Hybrid Automatic Repeat Request (HARQ) solution is employed to guarantee reliable communications against errors in poor links. Results were validated using data collected from the LOON testbed-hosted at the NATO STO Centre for Maritime Research and Experimentation (CMRE) in La Spezia, Italy-and from the REP18-Atlantic sea trial conducted in Sept'18 in Portuguese water.

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“…In principle, stable or unstable periodic orbits of arbitrary length in a given chaotic system can be determined to any desired accuracy, so that a tailored set of such periodic sequences can be very useful [7][8][9][10]. In using UPO binary sequences for digital communication, it is necessary to find suitable control parameters for the selected chaotic system in order to optimize the digital machines generating the codes.…”

Section: Introductionmentioning

confidence: 99%

Comparison between constant feedback and limiter controllers

Zhou

2005

Phys. Rev. E

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Using symbolic dynamics of the one-dimensional unimodal map, the chaos stabilization mechanics of the feedback and limiter control schemes are considered. For feedback control, it is found that the control strength can be efficiently obtained from the superstable parameter of the embedded periodic orbits, and the scaling of the control-space period-doubling bifurcation cascade still obeys the Feigenbaum law. For Sarkovskii orbits, the scaling is also consistent with that of the original chaotic system. For limiter control, a single critical point in the unimodal map is extended to a superstable periodic window and a simple approach for determining the value of the control plateau is found. The scaling in the control space of the period-doubling bifurcation cascade is indeed superexponential. A different scaling for the fine structure of the Sarkovskii sequence is also found. Simple one-dimensional unimodal maps can also be used to generate maximum-length shift-register sequences.

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Codes for spread spectrum applications generated using chaotic dynamical systems

Cited by 27 publications

References 5 publications

Spread-spectrum sequences from unstable periodic orbits

Spread-spectrum sequences from unstable periodic orbits

In-Network Collaboration for CDMA-Based Reliable Underwater Acoustic Communications

Comparison between constant feedback and limiter controllers

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