Characterization of Full-Duplex Constant-Envelope Transceiver for Emerging Multifunction Systems

We assess the operation of a special multifunction full-duplex transceiver that uses its frequency-shifting constant-envelope transmitted signal as the downconversion carrier (in contrast to a tone for conventional direct conversion). While self-interference suppression is greatly simplified by using this architecture, the spectra of other downconverted signals turn up sweeping through the frequency domain as the cost of that. Adequate characterization and compensation of these consequences is the key to guarantee the required performance of emerging multifunction systems. We develop solutions to these effects and evaluate the behavior of the transceiver concept by varying transmission- and reception-related parameters.