AboutMark C J Posen Expertise I am happy to answer questions of a technical and regulatory nature in the area of satellite and radio communications. I am best able to answer questions about systems and technology and less able to respond to questions about specific hardware and equipment setup and installation, but I'm happy to try and address any question put my way.
My main areas of expertise are link analysis (link budgets, performance, Eb/No, capacity), interference analysis (C/I, protection ratios, interference avoidance), spectrum management (frequency coordination, inter-system sharing), Radio Regulation (ITU, ITU-R) and satellite technologies and trends.
Experience I have worked as a satellite communications engineer at a professional level since 1983. Since 1990, as Managing Director of RPC Telecommunications Limited, I have operated a private satellite communications consultancy and have provided technical support to many satellite operators and national governments.
Organizations IET - Institution of Engineering and Technology, IEEE - Institute of Electrical and Electronic Engineers
Expert: Mark C J Posen Date: 5/27/2008 Subject: data rate and SSPA size
Question Dear!
how can i choose data rate with SSPA size... how can we calculate beacon frequency of satellite
Answer It's rather more complex than your question implies. You need to know the satellite parameters (frequency, SFD, G/T, EIRP, etc.), earth-station paramaters (antenna diameter/gain, G/T, etc.) and modem parameters (BER, Eb/No, etc.) then set up a link budget which will determine the link performance that you can support with the available SSPA power. I recommend you download the demo version of SatMaster Pro (http://www.arrowe.com) which will let you set up the necessary link analysis. Regarding the beacon frequency, this depends on the satellite you are using. Each satellite will have its own beacon frequency which will be informed to you by the satellite operator.
