Dual-Mode Index Modulation Aided OFDM
Citations
676 citations
Cites background or methods from "Dual-Mode Index Modulation Aided OF..."
...In this GFDM-SFIM scheme, dual-mode IMprinciple of [31] is integrated to SM-based MIMO-GFDM systems to further improve their BER performance....
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...The authors of [31] proposed the scheme of dualmode OFDM (DM-OFDM) in which the major disadvantage of OFDM-IM is removed by the activation of the inactive subcarriers of OFDM-IM to transmit modulated symbols selected from a secondary constellation that is distinguishable from the primary constellation used by the active subcarriers (see Subsection VII....
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...activating all subcarriers while still exploiting IM [31]....
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292 citations
252 citations
Cites background or methods from "Dual-Mode Index Modulation Aided OF..."
...In [34], the “inactive” subcarriers of OFDM-IM are allowed to transmit modulated symbols drawn from a secondary constellation that is distinguishable from the primary constellation used by the “active” subcarriers, enlarging the symbol domain significantly while keeping the index domain unchanged....
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...The classical OFDM, OFDM-IM [8], DM-OFDM [34], and OFDM-I/Q-IM [17] schemes are chosen as reference in comparisons....
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...It is worth noting that due to the same multiple-mode transmission nature, our study of the optimal modes for the MM-OFDM-IM scheme is extendable to the DM-OFDM scheme, which is not performed in [34]....
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...This scheme, called dual-mode IM aided OFDM (DM-OFDM) in [34], is shown to achieve a larger MED than OFDM-IM under the same average bit energy....
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243 citations
Cites background or methods or result from "Dual-Mode Index Modulation Aided OF..."
...To overcome this performance limitation of single-mode based schemes, dual-mode IM aided OFDM (DM-OFDM) was developed in [46], which fully utilizes the valuable spec-...
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...Moreover, as demonstrated by the simulation results given in [41] and [46], the LLR-based detectors for GSIM-OFDM and DM-OFDM only suffer from slight performance loss, compared to their optimal ML counterparts, which are also illustrated in Fig....
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...After obtaining the UPEP of any two possible realizations of OFDM subblock, the estimated BER, which is referred to as average bit error probability (ABEP), can be derived as [46]...
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...Therefore, for systems with large sizes of constellation alphabets and/or high number of activated subcarriers, the log-likelihood ratio (LLR) algorithm [46] is invoked for reduced-complexity detection at the cost of slight performance degradation....
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...An example of MA and MB in DM-OFDM with MA = MB = 4 [46]....
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165 citations
Cites background from "Dual-Mode Index Modulation Aided OF..."
...The improvement is achieved by dividing all subcarriers into two groups and modulating the subcarriers within groups with two distinguishable constellation alphabets [32]....
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...Unlike the aforementioned two schemes, which focus on the enlargement of the index domain, the recently-emerging dual-mode index modulation aided OFDM (DM-OFDM) improves the SE by ensuring the increase of the number of ordinary modulation bits....
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...For the same reason described earlier, OFDM-HIQ-IM outperforms DM-OFDM in spite of a much larger SE....
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...and DM-OFDM [32] systems are also considered for comparison, where for the classical OFDM system we assume 4-QAM...
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...The classical OFDM, OFDM-IM [24], and DM-OFDM [32] systems are also considered for comparison, where for the classical OFDM system we assume 4-QAM and 16-QAM, for the OFDM-IM system we assume (n, k) = (4, 3) with 4-QAM and (8, 7) with 16-QAM, and for the DM-OFDM system we assume (n, k) = (4, 2) with (BPSK, π/2-rotated BPSK) and (8, 6) with (8-PSK, π/8-rotated 8-PSK) in Figs....
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References
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1,996 citations
"Dual-Mode Index Modulation Aided OF..." refers background in this paper
...The concept of index modulation (IM) is related to the principle of spatial modulation [4]–[6] originally conceived for multiple-input-multiple-output (MIMO) systems, which was then also invoked in the context of OFDM, leading to the index-modulation-based OFDM philosophy....
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1,171 citations
752 citations
729 citations
"Dual-Mode Index Modulation Aided OF..." refers background in this paper
...It is also capable of offering a low-complexity high-performance solution for mitigating the inter-symbol interference (ISI) caused by a dispersive channel [2], [3]....
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...by the mapper A are determined by the two index bits, which assume the values of [0, 0], [0, 1], [1, 0] and [1, 1], as I((1)) A = [1, 2], I (2) A = [2, 3], I (3) A = [3, 4] and I((4)) A = [1, 4], while the other subcarriers are modulated by the mapper B....
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