Receive signal processing for OFDM-based radar imaging

We propose a segment averaging matched-filter solution for recovering radar phase history data from orthogonal frequency division multiplex (OFDM) signals. The impact of digital communication features—guard bands, preambles, pilots, sync symbols, and cyclic prefixes—is discussed, and the derived matched-filter solution is modified accordingly. Experimental images using generic OFDM and IEEE 802.16 WiMAX signals demonstrate the success of the proposed signal processing approach for passive bistatic radar imaging.