DSP implementation of integrated store-and-forward APRS payload and OBDH subsystems for low-cost small satellite

Addaim, Adnane; Kherras, Abdelhaq; Zantou, El Bachir

doi:10.1016/j.ast.2007.08.002

Cited by 8 publications

(8 citation statements)

References 5 publications

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“…The AX.25 protocol, which is an amateur radio adaptation of the ITU-T X.25 protocol, supports the requirements for amateur satellite communication. The AX.25 packets are sent over the radio links (the Physical layer), over the same 145 MHz (uplink and downlink) VHF band (Addaim et al, 2008). The principal methodological steps are: 1. simultaneous capturing of geographical coordinates with handheld Global Positioning System (GPS) device and related attributes values with digital sensors (e.g.…”

Section: Methodology:-mentioning

confidence: 99%

“…These data packets form specific data sentences including positioning and sensors values information according to the syntax for packet radio communication, known as Automatic Position Reporting System (APRS) (Bruninga, 1993) which is very common between radio amateurs. The APRS provides various services such as mobile localization of ships and data collection from autonomous weather stations 368 in inaccessible sites and sends telemetry data of the satellite to all amateur ground stations all over the world (Addaim et al, 2008). The transmission of these data sentences is realized with the VHF radio transceiver that contains a special unit known as Terminal Node Controller (TNC).…”

Section: Acquisition and Transmission Methodsmentioning

confidence: 99%

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Real-Time Remote Monitoring Urban and Architectural 3d Digital Design and Spatial Simultaneous Simulation.

Kouzeleas¹

2018

IJAR

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Section: Methodology:-mentioning

confidence: 99%

Section: Acquisition and Transmission Methodsmentioning

confidence: 99%

Real-Time Remote Monitoring Urban and Architectural 3d Digital Design and Spatial Simultaneous Simulation.

Kouzeleas¹

2018

IJAR

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“…The link budget, shown in Table I, demonstrates how an acceptable service can theoretically be obtained, using GMSK modulation [6], between a Nanosatellite with simple omnidirectional antenna, and a RN with quarter wavelength antenna. We use only one frequency for both uplink and downlink in order to keep the system overall cost very low.…”

Section: Radio Linkmentioning

confidence: 99%

“…The lifetime of the Nanosatellite is about three months [6]. In this section, we will calculate the energy consumption of each RN to be deployed on the ground in operation mode.…”

Section: Relay Node Life Timementioning

confidence: 99%

“…The compact design of the RN facilitates its fixing aboard many types of payloads, including cargo containers, buoys, pipelines and boats. In fact, The RN proposed in this paper is based on the Nanosatellite electronic card payload [6] with the addition of a GPS board and a backup lithium battery instead of Nanosatellite electrical power subsystem. Its built-in software handles all functions involved in collecting, packaging, and transmitting the various data to the Nanosatellite from all SNs belong to its cluster.…”

mentioning

confidence: 99%

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Design of WSN with Relay Nodes Connected Directly with a LEO Nanosatellite

Addaim¹,

Kherras²,

Guennoun³

2014

IJCCE

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Abstract-There have been a few studies in the literature about using a Low Earth Orbit (LEO) satellite as a component of wireless sensor network (WSN). The satellite, as small as a Nanosatellite with a lifetime of three months, requires employment of a very simple payload whereas all the complexity is brought back to the relay nodes (RNs) which are connected directly to the Nanosatellite using a random access protocol. The mainly constraint on the design of this type of RN is its energy consumption which determine the lifetime of the WSN network. In this article, in order to calculate the energy comsumption of each RN, we will establish a mathematical model which takes into account all parameters involved for determining the lifetime of a RN for direct Communication with a LEO Nanosatellite. This model is completted by using discret event simulator. The simulations show that we could reach the maximum number of RNs that can be served by the Nanosatellite by implementing an optimized method of energy-saving on these RNs.Index Terms-LEO satellite, data aggregation, slotted ALOHA, WSN, satellite communication. I. INTRODUCTIONRecent advances in the development of Wireless Sensor Networks (WSNs) [1] reveal a new architecture [2] for WSN network using direct communication between typical RNs and a satellite. In this paper, each RN plays the role of cluster head node which consists of aggregating received data from many sensor nodes into an aggregated data packet and then forwarding the aggregated data packet to the Nanosatellite.The network architecture under consideration consists of SNs, RNs, a satellite and a Central Station (see Fig. 1). SNs located in specified predetermined sensing locations send the gathered physical information to a RN, which in turn forwards the data to the LEO Nanosatellite. Noted that the number of passes per day of the Nanosatellite, with altitude of 650Km, over the same service area on the earth is equal to four [3]. A central station could gather data via the Nano-satellite from worldwide remote sites, where human presence is expensive and difficult to support (montains, deserts, oceans, dams, …). Then the gathered data will be archived to a database and accessed by Internet. In this article, we will focus on the direct communication between the RNs and the Nanosatellite and especially on the energy consumption of a RN which is the key parameter to design such WSN. Manuscript received February 12, 2014; revised April 28, 2014. A. Addaim is with the Ecole Nationale des Sciences Appliqué es (ENSA), Kenitra, B.P 241,.A. Kherras and Z. Guennoun are with the Mohammadia Engineering School, Rabat, B.P 765, Morocco (e-mail: kherras@emi.ac.ma, guennoun@emi.ac.ma). II. SYSTEM DESCRIPTION Consider a communication network comprising one LEO Store and forward Cubesat Nanosatellite and a finite number of RNs on the ground. The instantaneous coverage of the satellite depends on the minimum angle of elevation E min under which any RN can be serviced by the Nanosatellite. Because of the spherical shape...

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Sensing Accuracy Improvement for Gyrowheel Based on Sensitivity Analysis and Accurate Estimation of Tilt-Related Signals

Zhao

Wang

et al. 2023

Lecture Notes in Electrical Engineering

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DSP implementation of integrated store-and-forward APRS payload and OBDH subsystems for low-cost small satellite

Cited by 8 publications

References 5 publications

Real-Time Remote Monitoring Urban and Architectural 3d Digital Design and Spatial Simultaneous Simulation.

Real-Time Remote Monitoring Urban and Architectural 3d Digital Design and Spatial Simultaneous Simulation.

Design of WSN with Relay Nodes Connected Directly with a LEO Nanosatellite

Sensing Accuracy Improvement for Gyrowheel Based on Sensitivity Analysis and Accurate Estimation of Tilt-Related Signals

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