Radio Channel Characterization for IEEE 802.11

The performance of mobile ad hoc wireless networks has been primarily limited by the radio propagation channel. In the mobile radio environment, fading due to multipath delay spread impairs received signals. The aim of this paper is to propose a suitable mobile radio channel model based on a Tapped Delay Line (TDL) structure that not only examines the effect of various parameters on channel behavior, but also represent the environment in which the mobile ad hoc wireless networks (IEEE 802.11 b/g) operates. The performance of the time-varying nature of the radio channel is studied and simulated by plotting the signal constellations using QPSK modulation technique.