Increasing reliability of an interactive mobile satellite telecommunication system using diversity and MIMO schemes

Observation of the mobile satellite system industry shows a significant growth in the need for more demanding services and higher rates these last years; as an example, recent success of hybrid broadcasting system (XM, Sirius) and DVB-SH arrival are meeting commercial users expectations in terms of high rates mobile communications. In this context, the use of diversity and MIMO schemes (cyclic delay diversity and Alamouti) is studied in this paper in the aim of increasing reliability of interactive systems which don´t take benefit of very long interleaving time durations (as pure broadcasting systems). Simulations have been done on a DVB-SH physical layer adapted to support 1×1, 1×2, 2×1, 2×2 multiplexing schemes. Satellite mobile MIMO channels have been used. This paper presents combinations of diversity/MIMO architectures, interleaving durations, channels, and makes the trade off of the air interface adjustment regarding of the results.