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This technology enables synthetic or inverse synthetic aperture radar (I/SAR) techniques to be performed on independent transmitters and receivers, which do not necessarily share a common frequency or clock reference. It has commercial applications in processes that involve synthetic aperture radar imaging, localization, and gesture sensing between distributed wireless nodes, and can be used for example, to develop a wireless device that can identify the locations of cellular phones in the environment or a Wi-Fi access point that can localize surrounding client nodes.