WANG Meng‑yi,CHEN Zhen‑xing,CHEN Zhi-hui.Generalization of Zero‑Padded Tri‑Mode OFDM with Index Modulation Based on Three‑Stage LLR Detection[J].ACTA ELECTRONICA SINICA,2021,49(07):1291-1297.
WANG Meng‑yi,CHEN Zhen‑xing,CHEN Zhi-hui.Generalization of Zero‑Padded Tri‑Mode OFDM with Index Modulation Based on Three‑Stage LLR Detection[J].ACTA ELECTRONICA SINICA,2021,49(07):1291-1297. DOI: 10.12263/DZXB.20201420.
Generalization of Zero‑Padded Tri‑Mode OFDM with Index Modulation Based on Three‑Stage LLR Detection
we propose a generalization of zero‑padded tri‑mode orthogonal frequency division multiplexing with index modulation (GZTM‑OFDM‑IM) system based on the log‑likelihood ratio (LLR) detection. In the proposed system
a dual‑mode signal constellation is designed and applied
and a three‑stage detector based on LLR algorithm is applied for the receiver. Due to more index activation patterns produced in the transmitter
spectral efficiency (SE) of the proposed system is efficiently improved compared with the traditional ZTM‑OFDM‑IM system. Simulation results show that the GTM‑OFDM‑IM system has higher SE than the corresponding ZTM‑OFDM‑IM
and maintains the bit error rate (BER) performance depending on the proposed detection algorithm with low computational complexity. And theoretical BER upper bound of the proposed system is fit to the simulation results at the high signal‑to‑noise ratio (SNR) region.
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