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2 2011

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Cyfrowy odbiór sygnałów systemu Inmarsat M

Studański R., Brewka M., Studańska A., Wąs R.

Zeszyty Naukowe Akademii Marynarki Wojennej

2011

R. 52 nr 4 (187)

103-111

W artykule przedstawiono cyfrowe metody odbioru sygnałów systemu Inmarsat M z modulacją OQPSK. Zaprezentowano procedury synchronizacji dla potrzeb odbioru koherentnego. Podano wyniki badań symulacyjnych i analitycznych.

The paper presents digital reception methods of Inmarsat-M system signals with OQPSK modulation. It discusses methods of synchronization for coherent reception. It also includes the results of simulation and analytical investigations.

Research on quality requirements of data transmission services in RSMAD

Gajewska M., Gajewski S., Sokół M., Staszkiewicz L., Brewka M.

Archives of Transport System Telematics

2011

Vol. 4, iss. 1

43-48

The paper presents results and analysis of research of the quality of service requirements (defined by the QoS attributes) for imaging data transmission services using Radio System for Monitoring and Acquisition of Data from Traffic Enforcement Cameras (in short RSMAD). The paper also presents and discusses results of test on the impact of the size of photos from traffic enforcement cameras on the average transmission time. These tests were conducted under conditions of actual operation of the RSMAD system. Basing on the obtained results, an analysis of the capacity, to provide in the RSMAD system required quality of service by different wireless data transmission systems, was performed.