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The DVB set of standards for satellite communication is mature, field proven and efficient. Over the recent year, SatixFy, in collaboration with other DVB member companies, has been working to adapt this standard to the specific requirements of Non-Geostationary Satellites (NGSO) systems. These adaptations include incorporating signaling for accurate ephemeris, supporting beam-hopping, and enhancing the capacity and performance of the return link. The paper outlines the main modifications to the specifications and presents the results of analyses performed on the expected Doppler and the operation without GNSS.

Beam-hopping is an important technology that enables the better utilization of satellite assets for geosynchronous satellites, especially for non-geosynchronous (NGSO) constellations. This technology is matured and is supported in the DVB-S2X standard. With the new amendments to the signaling standards of DVB-SI and DVB-RCS2 for both beam-hopping and NGSO constellations, it can also be integrated into interactive NGSO-based RCS2 systems. This paper describes the signaling elements, provides an estimate for the overhead it introduces and describes a general procedure for connecting a new terminal to an interactive DVB-RCS2 based system.

JOEYSAT is an advanced broadband Ku/Ka Band satellite that was launched into Low Earth Orbit (LEO) on May 20, 2023. It incorporates a fully digital next generation communication payload, made up from a set of digital beamforming antenna arrays coupled with a regenerative on-board processor. The combination of digital beamforming, steering and hopping with powerful on-board digital processing allows the payload to enhance the efficiency and reliability of satellite communication systems suffering from limited bandwidth, high latency, and interference. This presentation outlines the underlying technology elements, the test results obtained so far and the additional tests planned.

Beam-hopping was shown to provide a level of flexibility that makes it possible to increase served traffic, reduce areas of unmet demand while enabling the reduction of power consumption on-board. In the paper we study the impact on utilization and capacity, as a function of various deployment parameters, of those features.

Electronically steered digital beam-forming antenna arrays have gained significant attraction in satellite communications and 5G applications. Electronical steering has the distinct advantage of not requiring mechanical rotating parts and thanks to digital beamforming, supporting of multiple beams simultaneously is possible unlike analog phase arrays.

The design of new generation of satellites- multibeam High Throughput Satellites, LEO and MEO constellations and alike, needs to be highly cost-effective and adaptive to the actual demand. Beam-hopping was shown to provide a level of flexibility that makes it possible to increase served traffic, reduce areas of unmet demand while enabling the reduction of power consumption on-board.

This paper presents special ways in which digital processing, can be utilized to make use of SatixFy’s fully digital wideband multibeam steerable antenna aperture.

In this paper, real-time performance measurement results of a digital electronically steered multi-beam antenna (ESMA) system are presented for static and mobility conditions using actual signals from active satellites.

This paper presents an adaptation to the network architecture envisioned by DVB-RCS2 that splits the network hub between the part of the satellite payload that serves a user beam and a separate, associated ground control function

This paper discusses system deployment and configuration scenarios as well as features of the DVB-S2X standard speci-fication for beam-hopping.

In this paper we present measurement results of an antenna using the actual production chips, as well as a new AERO antenna, based on the chip set.

In this paper we analyze the performance of beam-hopping system in terms of beam utilization, comparing various approaches to beam-hopping scheduling, for both transparent and regenerative payloads.

The evolution of high throughput satellites (HTS), towards smaller beams (VHTS) sets a reference criterion in space segment cost per Mbps. In this paper, we will present the system design considerations of a LEO satellite constellation targeting broadband applications.

This article presents the SDR ASIC designed by SatixFy for a Regenerative processor payload, combined with the reasoning to use a regenerative processor in modern UHTS and LEO constellations both from a technical and commercial points of view.

Beam-hopping was shown to provide a level of flexibility that makes it possible to increase served traffic, reduce areas of unmet demand while enabling the reduction of power consumption on-board. In the paper, we discuss and analyze the system considerations for implementation of beam-hopping in a multi-beam environment and the trade-offs required for different applications.

In this paper, we analyze the performance and limits of such a fully digital wideband beamforming antenna array taking into account actual implementation.

The ever-increasing demand for data communication traffic, combined with the need for truly global coverage has spurred the introduction of new satellite systems with Low Earth Orbit (LEO) constellations, which are to operate independently, or in conjunction with Geosynchronous Earth Orbit (GEO) satellite fleets.
The paper takes a step further in analyzing the total capacity that can be achieved by a satellite system whereby terminals can receive, via multi-beams, several satellites. Thus, making it possible to re-use spectrum and uniformly share the load among multiple satellites.