An Indoor Distributed Image System Based on Impulse Radio

This paper investigates a distributed imaging method based on impulse radio and time of arrival (TOA) in a typical indoor environment. In such a multi-path environment, the challenge is to detect the direct-path component in the received signal. A valid algorithm based on the generalized maximum-likelihood (GML) estimation to detect direct-path in the presence of dense multi-path is presented. In spite of pulse distortions due to multi-path propagation through the channel, our simulation in a typical office building shows that an acceptable imaging using UWB signals can be achieved.