On the use of ordered statistics decoders for low-density parity-check codes in space telecommand links

Baldi, Marco; Maturo, Nicola; Chiaraluce, Franco

doi:10.1186/s13638-016-0769-z

Cited by 28 publications

(35 citation statements)

References 23 publications

(25 reference statements)

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“…As a result, even though ADZF scheme has extra operations compared with FC scheme, it still have benefit in the viewpoint of complexity. Finally, as a merit of the proposed scheme, ADZF scheme is compatible with the various existing schemes using LDPC codes, such as [32][33][34], in the viewpoint of the practical usage of their schemes. Decoding complexity of their schemes is reduced through simply adopting proposed scheme to LDPC decoder.…”

Section: Simulation Resultsmentioning

confidence: 74%

Adaptive deactivation and zero-forcing scheme for low-complexity LDPC decoders

Kim

Baik

Lee

et al. 2017

J Wireless Com Network

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A modified message propagation algorithm is proposed for a low-complexity decoder of low-density parity-check (LDPC) codes, which controls the information propagated from variable and check nodes.The proposed threshold-based node deactivation for variable nodes and zero-forcing scheme for check nodes remarkably reduce decoding complexity required for similar error performance. In the proposed scheme, different thresholds, which are determined from the base matrix of the LDPC codes, are applied for each type of variable node. In addition, thresholds for deactivating variable nodes are increased while the decoding process is operated for a reduction in decoding complexity without early error floor, which is a drawback of the conventional threshold-based deactivation scheme. Simulation results show that the proposed scheme enables normalized min-sum decoders to decode successfully with less complexity than the conventional threshold-based deactivating scheme.

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Section: Simulation Resultsmentioning

confidence: 74%

Adaptive deactivation and zero-forcing scheme for low-complexity LDPC decoders

Kim

Baik

Lee

et al. 2017

J Wireless Com Network

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“…at modulation ("waveform") level. LPI and LPD waveforms [32][33] [34] along with signal processing and channel coding techniques [35] are highly effective against jamming attacks and interception. Early studies of information-theoretic physical layer security focused on multibeam satellite communications.…”

Section: B Related Resultsmentioning

confidence: 99%

Physical Layer Security for RF Satellite Channels in the Finite-Length Regime

Vázquez-Castro

Hayashi

2019

IEEE Trans.Inform.Forensic Secur.

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Secure communications is becoming increasingly relevant in the development of space technology. Well established cryptographic technology is already in place and is expected to continue to be so. On the other hand, information theoretical security emerges as a post-quantum versatile candidate to complement overall security strength. In order to prove such potential, performance analysis methods are needed that consider realistic legitimate and eavesdropper system assumptions and non-asymptotic coding lengths.In this paper we propose the design of secure radio frequency (RF) satellite links with realistic system assumptions. Our contribution is three-fold. First, we propose a wiretap channel model for the finite-length regime. The model includes an stochastic wiretap encoding method using existing practical linear error correcting codes and hash codes. Secrecy is provided with privacy amplification, for which the finite-length secrecy metric is given that upper bounds semantic secrecy. Second, we derive a novel RF (broadcast) satellite wiretap channel model that parameterizes the stochastic degraded channel around the legitimate channel, a necessary condition to enable secure communication. Finally, we show the design of a secure satellite physical layer and finite-length performance evaluation. In doing so, we define as sacrifice rate the fixed fraction of the overall coding rate budget for reliability that needs to be allocated to secrecy. Our methodology does not make use of channel side information of the eavesdropper, only assumes worst case system assumptions. We illustrate our proposed design method with numerical results using practical error correcting codes in current standards of satellite communication.

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“…The application of the non-iterative MRB algorithm (alone or inside the hybrid decoding) to LDPC codes has been recently investigated from a theoretical point of view [4], [5]. To the best of authors' knowledge, however, no practical implementation has been reported, until now, in the literature.…”

Section: A Decodingmentioning

confidence: 99%

“…Starting from this basic version, some techniques which allow reducing the algorithm complexity and properly generating the test error patterns are described in [4].…”

Section: A Decodingmentioning

confidence: 99%

Theoretical Analysis and Implementation of Effective Receivers for Telecommand Space Links

Baldi

Prata

Simone

et al. 2019

2019 8th International Workshop on Tracking, Telemetry and Command Systems for Space Applications (TTC)

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This paper deals with the feasibility of the new receiver scheme for telecommand space links, based on the adoption of short low-density parity-check codes recently introduced in the standard. Being able to reduce significantly the required signal-to-noise ratio, these codes have an impact on the acquisition, tracking and synchronization issues. All these aspects have been faced, both theoretically and practically through the realization of a breadboard that implements the core elements of the on-board receiver, and is able to demodulate and decode uplink signals employing the new codes. The breadboard incorporates innovative solutions to cope with the acquisition and synchronization problems, and a pioneering implementation of non-iterative decoders based on the most reliable basis algorithm.

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On the use of ordered statistics decoders for low-density parity-check codes in space telecommand links

Cited by 28 publications

References 23 publications

Adaptive deactivation and zero-forcing scheme for low-complexity LDPC decoders

Adaptive deactivation and zero-forcing scheme for low-complexity LDPC decoders

Physical Layer Security for RF Satellite Channels in the Finite-Length Regime

Theoretical Analysis and Implementation of Effective Receivers for Telecommand Space Links

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