Abstract
This letter presents a capacity analysis of filter bank multicarrier offset quadrature amplitude modulation (FBMC-OQAM) systems. In FBMC-OQAM receivers, it is common to preserve the real part of the demodulated signal samples for information recovery. The imaginary part of these samples, which are called intrinsic interference, is simply ignored. This letter provides a theoretical answer to the following fundamental question. Does the ignored imaginary interference in FBMC-OQAM contain any information beyond what could be obtained from the preserved real parts?
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