Novel digital platform for deep space transponders: the transmitter side

Simone, L.; Gelfiisa, D.; Cocchi, S.; Comparini, M.C.; Fiore, D.; Piloni, V.; Rapposelli, A.; Capannolo, M.

doi:10.1109/aero.2004.1367920

Cited by 3 publications

(1 citation statement)

References 11 publications

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“…For TT&C applications, after the digitization of TT&C baseband signals, the current trend is to use the digital modulation mode represented by frequency shift keying (FSK) to obtain high-power efficiency [46]. In addition, considering the demand for constant envelope characteristics in TT&C as well as bandwidth limitations, MSK and GMSK are also recommended [47,48]. For spread-spectrum TT&C, typical direct sequence spread spectrum technology usually uses BPSK modulation [33,[49][50][51][52].…”

Section: Principle Of Single-station Emergency Icandt 21 Icandt Modul...mentioning

confidence: 99%

Chaff Cloud Integrated Communication and TT&C: An Integrated Solution for Single-Station Emergency Communications and TT&C in a Denied Environment

Ye,

Yang,

Chen

et al. 2024

Drones

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In response to potential denial environments such as canyons, gullies, islands, and cities where users are located, traditional Telemetry, Tracking, and Command (TT&C) systems can still maintain core requirements such as availability, reliability, and sustainability in the face of complex electromagnetic environments and non-line-of-sight environments that may cause service degradation or even failure. This paper presents a single-station emergency solution that integrates communication and TT&C (IC&T) functions based on radar chaff cloud technology. Firstly, a suitable selection of frequency bands and modulation methods is provided for the emergency IC&T system to ensure compatibility with existing communication and TT&C systems while catering to the future needs of IC&T. Subsequently, theoretical analyses are conducted on the communication link transmission loss, data transmission, code tracking accuracy, and anti-multipath model of the emergency IC&T system based on the chosen frequency band and modulation mode. This paper proposes a dual-way asynchronous precision ranging and time synchronization (DWAPR&TS) system employing dual one-way ranging (DOWR) measurement, a dual-way asynchronous incoherent Doppler velocity measurement (DWAIDVM) system, and a single baseline angle measurement system. Next, we analyze the physical characteristics of the radar chaff and establish a dynamic model of spherical chaff cloud clusters based on free diffusion. Additionally, we provide the optimal strategy for deploying chaff cloud. Finally, the emergency IC&T application based on the radar chaff cloud relay is simulated, and the results show that for severe interference, taking drones as an example, under a measurement baseline of 100 km, the emergency IC&T solution proposed in this paper can achieve an accuracy range of approximately 100 m, a velocity accuracy of 0.1 m/s, and an angle accuracy of 0.1°. In comparison with existing TT&C system solutions, the proposed system possesses unique and potential advantages that the others do not have. It can serve as an emergency IC&T reference solution in denial environments, offering significant value for both civilian and military applications.

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Section: Principle Of Single-station Emergency Icandt 21 Icandt Modul...mentioning

confidence: 99%

Chaff Cloud Integrated Communication and TT&C: An Integrated Solution for Single-Station Emergency Communications and TT&C in a Denied Environment

Ye,

Yang,

Chen

et al. 2024

Drones

View full text Add to dashboard Cite

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Design of a Fully Digital BPSK Demodulator Integrated into a TT&C Satellite Transponder

Lucena

Silva

Viot³

et al. 2020

IEEE Latin Am. Trans.

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A Variable Sample Rate Recursive Arithmetic Half Band Filter for SDR-based Digital Satellite Transponders

Baek¹,

Lim²,

Kim³

2013

The Journal of Korean Institute of Communications and Informati

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Due to the limited power supply resources, it is essential that the minimization of algorithmic operation and the reduction of the hardware logical-resources in the design of the satellite transponder. It is also required that the transponder process the signals of various bandwidth efficiently, that is suitble for the SDR-based implementation. This paper proposes a variable rate down sampler which can provide variable bandwidth and data rate for carrier, ranging and sub-band command signals respectively. The proposed down sampler can provide multiple 2 M decimated outputs from a single half band filter with recursive arithmetic architecture, which can minimize the hardware resources as well as the arithmetic operations. The algorithm for hardware implementation as well as the analysis for the passband flatness and aliasing is presented and varified by the FPGA implementation.First Author：숭실대학교 정보통신전자 공학부 무선통신시스템연구실,

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Novel digital platform for deep space transponders: the transmitter side

Cited by 3 publications

References 11 publications

Chaff Cloud Integrated Communication and TT&C: An Integrated Solution for Single-Station Emergency Communications and TT&C in a Denied Environment

Chaff Cloud Integrated Communication and TT&C: An Integrated Solution for Single-Station Emergency Communications and TT&C in a Denied Environment

Design of a Fully Digital BPSK Demodulator Integrated into a TT&C Satellite Transponder

A Variable Sample Rate Recursive Arithmetic Half Band Filter for SDR-based Digital Satellite Transponders

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