In order to solve the problem that the severe inter-symbol interference (ISI) introduced by faster-than-Nyquist (FTN) strong filtering leads to the degradation of the equalization capability of the traditional receiver side (Rx) IQ imbalance compensation, a two-stage Rx IQ imbalance compensation algorithm is designed and demonstrated in this paper. The algorithm uses a time domain equalizer based on the decision directed-least mean square (DD-LMS) algorithm cascaded with a 4×2 frequency domain (FD) equalizer based on the radius directed equalization (RDE) algorithm, which can effectively improve the compensation range compared to using only a conventional 4×2 FD equalizer based on the RDE algorithm. 128Gbaud-FTN-PM-16QAM system simulation results show that with an acceleration factor as low as 0.85, the designed algorithm has a 14.3%, 100% and 40% improvement in the compensation range of Rx IQ amplitude, phase and skew imbalance compared to using only the 4×2 FD equalizer based on the RDE algorithm. The results validate the performance improvement of the proposed algorithm.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.