《06924001 IEEE Parameter Estimation for Link Adaptation on Land-Mobile Satellite Links》.pdf

2014 9th International Symposium on Communication Systems, Networks Digital Sign (CSNDSP) Parameter Estimation for Link Adaptation on Land-Mobile Satellite Links Michael Bergmann, Wilfried Gappmair, Otto Koudelka Institute of Communication Networks and Satellite Communications Graz University of Technology, Austria Abstract—Propagation conditions on a land-mobile satellite test their performance in a simplified environment [8]. The (LMS) link may change within the round-trip time. While for current paper extends this work to LF conditions and discusses slowly fading channels the signal-to-noise ratio (SNR) is the most the advances made in in this context. The basic LMS scenario important figure of merit to adapt the related transmission pa- used for analytical and simulation work is sketched in Fig. 1. rameters, this does not hold true for mobile channels in general. Additional information about the signal-to-interference ratio (SIR) and the Doppler spread of the fading component are typi- cally necessary for successful link adaptation techniques. In this paper, we address carrier recovery as well as estimation of SNR, SIR, and Doppler spread for a Loo-Fontan channel, which is in the open literature frequently considered as a suitable model for LMS links. The focus is on the performance of an estimation framework, which we identified in a precursor study to be ap- propriate for correlated Rice channels. This developed frame- work is extended to LF conditions and verified by simulation results. Keywords—Parameter estimation; Land-mobile sa