Exploiting Signal Space Diversity in OFDM With Grouped Subcarriers: Going Beyond Subcarrier Index Modulation | IEEE Journals & Magazine | IEEE Xplore

Exploiting Signal Space Diversity in OFDM With Grouped Subcarriers: Going Beyond Subcarrier Index Modulation


Abstract:

We propose a unified approach for orthogonal frequency-division multiplexing with grouped subcarriers which encompasses previous schemes such as subcarrier-index modulati...Show More

Abstract:

We propose a unified approach for orthogonal frequency-division multiplexing with grouped subcarriers which encompasses previous schemes such as subcarrier-index modulation and grouped linear constellation-precoding as particular cases. To exploit signal space diversity (SSD), we treat the n subcarriers within a group as 2n real resources. Interleaving at the real component level is used to break the correlation between adjacent subcarriers. Error performance analysis then reveals that a 2n-dimensional real signal constellation (codebook) should be designed according to the SSD criterion and the multiplicity-to-product distance ratio criterion. Under certain constraints, the maximum diversity gain of 2n can be achieved by proper design. We design new codebooks based on real lattices and show through both computer simulations and analysis that a superior error performance can be achieved.
Published in: IEEE Wireless Communications Letters ( Volume: 7, Issue: 4, August 2018)
Page(s): 650 - 653
Date of Publication: 19 February 2018

ISSN Information:

Funding Agency:


References

References is not available for this document.