IMPROVEMENT IN DATA TRANSMISSION EFFICIENCY IN COMMUNICATION SYSTEMS USING SCATTERING COMPENSATION TECHNIQUES

Abstract

The primary requirement for maximum power transfer and minimum power loss is matched impedance in a transmission system. However, static design variations in system such as parasitics and dynamic variations such as changes in transmission frequency will result in re∞ections. A redesign or reconflguration of complex systems is neither easy nor cost efiective. A noble technique for compensating re∞ections in a communication system is presented here. The proposed methodology adapts the system to change without any modiflcation to the system physical conflguration. In this methodology compensation signals are added by I/O drivers with programmable phase delay and drive strength adjustments to cancel re∞ections. The concept application is demonstrated for a narrow bandwidth antenna system. An operating frequency ofi the antenna frequency results in a degraded received message eye. Using the proposed technique, without modifying the antenna, re∞ections were compensated and a signiflcantly improved data eye was produced, as measured by the enhancement of critical performance parameters. The architecture of an expanded driver to implement the concept is outlined here. An algorithm and ∞ow chart to dynamically identify and compensate for re∞ections are also presented.