Abstract
In this paper, we extend the concept of adaptive spatial modulation to the parallel Gaussian channel with finite alphabet input and propose a transmit scheme called adaptive index modulation (AIM). In the proposed scheme, the transmitter adaptively selects the index modulation pattern, consisting of the active channel subset and the associated signal constellations, according to the criterion of maximizing the minimum squared Euclidean distance. To reduce the complexity, first, the number of candidate patterns in the selection procedure is reduced by employing the relation of the normalized signal constellations with different modulation orders. Second, a simple lookup table method is presented. Finally, the performance of the proposed scheme is demonstrated in both the scenarios of multicarrier transmission and multiantenna transmission by computer simulations.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: 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.