Voyager Telecommunications

Ludwig, Roger; Taylor, Jim

doi:10.1002/9781119169079.ch3

Cited by 13 publications

(13 citation statements)

References 3 publications

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“…By retrieving the implicit internal information and photon statistics globally from survived photons, we reveal the time evolution of photon statistics with high resolution and realize the precise manipulation of the system performance during the communication. Compared with achievable technology encouraged by NASA [4,38,39] and existing technology equipped on Voyager 1 [1], our scheme inspires interstellar optical communication with reasonable telescope aperture and low power dissipation (see Table 1). The potential applications include various high-loss scenarios such as underwater wireless optical communication over one kilometer, air-to-sea long-distance time and frequency transmission, and interplanetary optical broadcast.…”

Section: Conclusion and Discussionmentioning

confidence: 99%

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Photon-Inter-Correlation Optical Communication

Yan,

Hu,

et al. 2021

Preprint

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The development of modern technology extends human presence beyond cislunar space and onto other planets, which presents an urgent need for highcapacity, long-distance and interplanetary communication. Communication using photons as carriers has a high channel capacity, but the optical diffraction limit in deep space leads to inevitable huge geometric loss, setting an insurmountable transmission distance for existing optical communication technologies. Here, we propose and experimentally demonstrate a photon-intercorrelation optical communication (PICOC) against an ultra-high channel loss.We treat light as a stream of photons, and retrieve the additional information of internal correlation and photon statistics globally from extremely weak pulse sequences. We successfully manage to build high-fidelity communication channel with a loss up to 160dB by separating a single-photon signal embed-1

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Section: Conclusion and Discussionmentioning

confidence: 99%

“…Zeng-Quan Yan, 1,2, * Cheng-Qiu Hu, 1,2, * Zhan-Ming Li, 1,2 Zhong-Yuan Li, 3 Hang Zheng, 1,2 Xian-Min Jin…”

Section: Fundingmentioning

confidence: 99%

Photon-Inter-Correlation Optical Communication

Yan,

Hu,

et al. 2021

Preprint

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“…Indeed, consider the Voyager I probe, which is by far the longest existing, continuously operating, untouched device. It was launched in 1977 and can still communicate with NASA's Deep Space Network [25]. The extreme cost (in both time and money) required to replace Voyager justifies continued investment in its supporting infrastructure.…”

Section: What Makes Century-scale?mentioning

confidence: 99%

Century-scale smart infrastructure

Jagtap

Bhaskar

Pannuto

2021

Proceedings of the Workshop on Hot Topics in Operating Systems

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On average, wireless electronics devices are replaced every 50 months. On average, a bridge is replaced every 50 years. As we begin to imagine integrating electronics and intelligence into the built environment, we need to to begin to think about electronic devices and systems on infrastructure timelines. This is not to say that every individual electronic device can, will, or should last for decades, but much like the ship of Theseus, the system that defines emerging Smart Cities will have a lifetime reaching into the century-scale. In this paper, we contemplate what the devices, gateways, network architectures, and their management might look like for a system designed to operate for decades. The result is a mixture of actionable insights for today and research questions for tomorrow, which culminates in the commencement of a 50-year experiment designed to see how long energyharvesting sensors, without the implicit lifetime of batteries, can remain viable without human attention or intervention.

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“…We performed CKLT analysis of the Voyager 1 (Ludwig & Taylor 2016) telemetry signal collected by the Breakthrough Listen group (UC Berkeley) with the Green Bank Telescope. The Voyager 1 telemetry signal consists in general into a bi-phase modulation BPSK where the central carrier is emitted by the spacecraft a 8415 MHz.…”

Section: Real Data: Voyagermentioning

confidence: 99%

Performance analysis of the Karhunen–Loève Transform for artificial and astrophysical transmissions: denoizing and detection

Trudu

Pilia

Hellbourg

et al. 2020

Monthly Notices of the Royal Astronomical Society

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In this work, we propose a new method of computing the Karhunen-Loève Transform (KLT) applied to complex voltage data for the detection and noise level reduction in astronomical signals. We compared this method with the standard KLT techniques based on the Toeplitz correlation matrix and we conducted a performance analysis for the detection and extraction of astrophysical and artificial signals via Monte Carlo simulations. We applied our novel method to a real data study-case: the Voyager 1 telemetry signal. We evaluated the KLT performance in an astrophysical context: our technique provides a remarkable improvement in computation time and Monte-Carlo simulations show significant reconstruction results for signal-to-noise ratio (SNR) down to -10 dB and comparable results with standard signal detection techniques. The application to artificial signals, such as the Voyager 1 data, shows a notable gain in SNR after the KLT.For this reason the KLT is, at least in principle, an ideal operator for performing blind adaptive filtering, and offers a better separation between the deterministic components within the received signals and the stochastic ones.The aim of this work is to study the applicability and detection and extraction performance of the KLT in the interstellar telecommunication and astronomical context, and introduce a new method which permits a fast implementation of the KLT based on a variant of the autocovariance matrix.The paper is organised as follows. In section 2 we introduce the artificial and astrophysical SOIs used in this analysis and we discuss their standard detection techniques. In section 3 we discuss the main mathematical equations for the KLT techniques used in this paper. In section 4 we show the reconstruction results of the KLTs for artificial signals. In section 5 we discuss the Monte Carlo simulations for both denoising and detection. In section 6 we present our results for Voyager 1 data. In section 7 we summarise our main results and conclude.

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Voyager Telecommunications

Cited by 13 publications

References 3 publications

Photon-Inter-Correlation Optical Communication

Photon-Inter-Correlation Optical Communication

Century-scale smart infrastructure

Performance analysis of the Karhunen–Loève Transform for artificial and astrophysical transmissions: denoizing and detection

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