MIMO CHANNEL SIMULATION AND ANALYSIS FOR MOBILE AD HOC WIRELESS NETWORKS

Abstract

The radio channel has very significant characteristics specially in Mobile Ad Hoc Wireless Networks because of its dynamic configuration, mobility, type of terrains in which the networks operates and fading and multipath propagation. The integration of Multiple Input Multiple Output (MIMO) elements for either diversity or spatial multiplexing makes the channel more complex for study and analysis. This thesis work implements the MIMO channel simulation for Mobile Ad Hoc Wireless Networks and studies and examines the effects of important characteristics on the channel. The characteristics like Doppler shift due to mobile devices, Doppler power spectrum, type of terrains, spatial correlation have been introduced in the channel and examined the channel behaviour. The MIMO channel simulation is implemented based on power delay profile, Doppler power spectrum and spatial correlation at the transmitter and receiver. The spatial correlation present at the transmitter and receiver has seen to have great effect on fading envelopes at the channel output. The simulation results obtained for 1*2 MIMO diversity indicate that the Gaussian spectrum is more suitable for signal estimation in low mobile velocity both in urban and hilly areas. But in high mobile velocity, Flat spectrum is suitable for signal estimation in urban areas and Flat and Jakes spectrum both are suitable for signal estimation in hilly areas. .