Systems Engineering and Electronics ›› 2018, Vol. 40 ›› Issue (1): 191-197.doi: 10.3969/j.issn.1001-506X.2018.01.28

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Space and frequency index modulation technique combining non-orthogonal subcarrier

WANG Yuan, LIU Wenlong, JIN Minglu#br#

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  1. School of Information and Communication Engineering, Dalian University of Technology, Dalian 116024, China
  • Online:2018-01-08 Published:2018-01-08

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Abstract:

Generalized space and frequency index modulation (GSFIM) shows better performance compared with traditional multiple input multiple output-orthogonal frequency division multiplexing (MIMO-OFDM). However, GSFIM has a complex system structure and a detector of high computational complexity. We research a peculiar space and frequency index modulation system, i.e. Spatial modulation (SM) based on frequency and quadrature amplitude modulation (FQAM)/frequency and phase shift keying (FPSK),which greatly simplifies the system structure. In order to improve the spectral efficiency of the system, we propose FQAM/FPSK-SM combining non-orthogonal subcarrier. Simulation results show that under the different parameter configurations, the proposed scheme not only enhances the spectral efficiency, but also achieves the nearly same performance as FQAM/FPSK-SM with the same transmit rate and improves throughput of unit bandwidth by adjusting the compression coefficient.

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