Performance Evaluation of Rician Fading Channels using QPSK, DQPSK and OQPSK Modulation Schemes in Simulink Environment
نویسنده
چکیده
Fading is a term used to describe the rapid fluctuations of the amplitudes, phases, or multipath delays of a radio signal over a short interval of time or travel distance, so that large-scale path loss effects may be completely ignored. When there is a dominant stationary signal component present, such as a line-of-sight propagation path, the small-scale fading envelope distribution is Ricean. Digital modulation techniques such as QPSK, DQPSK and OQPSK are dealt in this paper to analyze the characteristics of Rician fading channels in terms of the Bit Error Rate and the implementation is done in the Simulink environment. The paper begins with an overall review on the different type of models for estimating the propagation loss, followed by the different channel models in wireless standards and finally the analysis of Ricean fading characteristics for the different type of modulation schemes is discussed.
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تاریخ انتشار 2013