618 | Page DEVELOPMENT OF WIRELESS CHANNEL SIMULATOR USING LABVIEW Pitike Manisha 1 , Dr. B. Venkateshulu 2 1 M.Tech, Dept. of ECE ,GNITS, Hyderabad, Telangana, (India) 2 Professor, Dept. of ECE, GNITS, Hyderabad, Telangana, (India) ABSTRACT In the design of a digital communication link an assessment of its performance and reliability in the desired operational environments is required. Thus for clear understanding of wireless channels, their multipath and time variations should be characterized properly and suitable channel model should be developed. A class of aeronautical channel models is proposed for en-route, taxi, arrival and take-off situations. In this paper the different airborne channel and airborne scenario during different stages of a flight of an aircraft are presented and implemented by using MATLAB.A channel simulator is developed on Wideband Digital Scanning Transceiver using LabVIEW. Wideband Digital Scanning Transceiver is capable of recording and playing back faded signals which are practical solutions for testing receivers under signal fading and multipath conditions. Keywords: Airborne scenarios, Channel simulator,Multipath propagation,VSA and VSG. I.INTRODUCTION The development of channel model for wireless communication system is currently becoming important to fulfill the entire user’s requirements and increasing demand where to provide a good communication link between the users at everywhere and anytime. In wireless environment, transmitted signals are received through multiple paths due to reflection, scattering, and diffraction which results in fading of the received signal. The different paths have different propagation delays, attenuation and phase.Reflection, scattering and diffraction with direct line of sight path are shown in Fig. 1. They are known as multipath propagation and result in fading of the signal due to constructive and destructive superposition. Fig. 1 Multipath propagation in aeronautical communication