| Abstract: | For the prospective personal satellite communications in the early 21st century, this paper presents a general exploration of a Ka-band DBPSK/DQPSK land-mobile satellite channel model and its BER performance from system design, modelling and simulation. A forward-link (i.e. outbound from the hub) channel design is introduced in brief. A complete model of channel multipath fading and shadowing is proposed for the first time, including a basic model and various derivative submodels corresponding to different actual propagation environments. Computer simulation results are given for a Rician channel model, a shadowed channel model and different combinational-fading channel models by complete curve sets of BER performance, which coincide with the results of the analysis, and could be used as valuable references in further research and implementation. |
