Abstract
In this letter, a novel dual-mode index modulation aided orthogonal frequency division multiplexing (DM-OFDM) scheme called subcarrier-interactive (SI-) DM-OFDM is proposed. In the SIDM-OFDM, each subcarrier pair conveys the same QAM modulated symbols to achieve a diversity gain. At the receiver, a low complexity (LC) signal detection algorithm is proposed, i.e., SIDM-OFDM-LC, where each subcarrier interacts with other subcarriers in the same subblock as complementary and non-complementary states to improve BER performance. Moreover, Euclidean distance (ED) of the received signal and channel-noise matrix (CNM) based signal detection algorithms are employed for demodulation, namely SIDM-OFDM-ED and SIDM-OFDM-CNM, respectively. Simulation results confirm that the SIDM-OFDM with the proposed three signal detection algorithms achieves a significantly better BER performance than the existing DM-OFDM scheme at the same spectral efficiency. Also, it is revealed that the SIDM-OFDM-LC reduces the signal detection cost compared to the other two proposed detectors.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
