Adaptive Out-of-Band Interference Suppression for Coexistent Wi-Fi and Bluetooth Systems
Chin-Liang Wang, Min-Chau Jan, Yuan-Shuo Chang, Erlang Wang, Ying-Hsi Lin · IEEE Communications Letters · 2017
Coexistence of Wi-Fi and Bluetooth (BT) systems is often necessary in various handheld devices. Due to nonlinearities of radio frequency front-end components, leakage signals from one transmitter to the other transmitter would produce out-of-band (OOB) interference and corrupt adjacent frequency bands outside the spectral masks defined in standards. In this letter, we propose an adaptive OOB interference suppression scheme based on a modified normalized least mean-squared algorithm for coexistent Wi-Fi and BT transceivers. Computer simulation results show that the proposed approach provides pretty good performance in transmitter leakage cancellation and effectively relieves the OOB interference issue.