Resolution improvement for UWB wallscanning radar applications

An important quality criterion of radar systems is the maximum obtainable resolution. This limit is reached when echoes coming from adjacent objects overlap and it is no longer possible to distinguish between them. This paper presents an algorithm formulating the echo separation as an optimization algorithm. The basic idea is to model each received signal as a linear superposition of reference signals. The parameters of the model are obtained by using evolutionary optimization strategies. An example of imaging two pipes placed in a concrete wall verifies the proposed principle experimentally.