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The paper deals with the aspects of implementation and validation of the SpaceWire-R protocol as carried out in the ESA-funded project SpaceR. We give a brief overview of the SpaceWire-R protocol for providing reliable data transfer services over SpaceWire networks and describe the SpW-R protocol software implementation elaborated in the SpaceR project. The testing platform developed for validation...
Satellite transmission based on IP may play important role for communication between event site and PPDR centers during large planned scenarios and disaster/unplanned ones. Geostationary SATCOM links that can be installed ad-hoc in any location present reliable and efficient way to transmit IP data even for voice communication based on VoIP. Using different mechanisms that handle multi connections...
This paper presents the main outcomes of the ESA funded project entitled: “SPACEMAN — A SpaceWire Network Management Tool” that was jointly carried out by ITTI Sp. z o.o. and TELETEL SA., and dealt with SpaceWire Network Discovery and Configuration Protocol (SpW-NDCP). We give a brief overview of the SpW-NDCP, present the main features of the SPACEMAN tool for discovering and configuring SpaceWire...
Availability of modern, reliable and offering a wide range of services wireless communication systems is crucial for the effective operation of Public Protection and Disaster Relief (PPDR) agencies during the emergency situations. This paper presents the elements of the financial-economic analysis for acquiring and operating PPDR communication systems by the interested entities. It deals with business...
Turbo trellis-coded modulation (TTCM) is a promising bandwidth-efficient transmission scheme, particularly suited for applications in wireless communication systems. Turbo TCM results from the combination of Ungerboeck's TCM technique with the idea of turbo coding. In this paper, turbo TCM transmission with reduced-complexity decoding algorithms in Rayleigh fading channels is studied. In particular,...
A novel method for approximating the optimal max* operator used in Log- MAP decoding of turbo and turbo trellis-coded modulation (TTCM) codes is proposed being derived from a well-known inequality, which has not been published before. The max* operation is generalized, for the first time, and performed on n > 2 rather than n = 2 arguments, as it is the conventional approach. Complexity comparisons...
In this paper, a reduced complexity Log-MAP algorithm based on a non-recursive approximation of the max∗ operator is presented and studied for turbo trellis-coded modulation (TTCM) systems. In the algorithm, denoted as AvN Log-MAP, the max∗ operation is generalized and performed on n≥2 arguments. The approximation is derived from the Jensen inequality. The non-recursive form of the max∗ calculations...
In this paper, we study application of the novel reduced implementation complexity decoding algorithm - Log-MAP Delta to decoding serial concatenated convolutional codes (SCCC). We present BER performance results in an additive white Gaussian noise (AWGN) channel and compare the new algorithm against optimal Log-MAP and low complexity Max-Log-MAP decoding. Results show that the Log-MAP Delta algorithm...
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