<i>Q</i>-Ary Multi-Mode OFDM With Index Modulation

Yarkin, Ferhat; Coon, Justin P.

doi:10.1109/lwc.2020.2982157

Cited by 22 publications

(11 citation statements)

References 13 publications

(45 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, as will be shown in Fig. 2, a receiver performing only (10) and (11) in the presence of channel encoding fails to provide near-optimal error performance when N < 4. To solve this problem, instead of employing the MDS coding mechanism among symbol vectors, equivalent (N, N − 1) single parity check (SPC) code can be employed among information bits and the resulting bit sequence can be mapped to the symbol vectors.…”

Section: Log-likelihood Ratio Calculationmentioning

confidence: 89%

“…Performing the optimum ML detector in (4) requires excessive complexity when the size of the codebook, M , is high. To overcome this problem, we proposed low complexity ML (LC-ML) detectors in [10], [11] for the MDS modulation techniques and showed that these detectors perform close to the optimum ML detector while reducing the complexity significantly.…”

Section: B Receivermentioning

confidence: 99%

“…For the information bits related to the quadrature components of the constellation points, LLR values can be calculated in the same way as in (10) and (11). A receiver using these equations performs QM 1 squared Euclidean distance calculations per bit, thus such a receiver exhibit much lower complexity than that of a receiver using ( 7) and ( 9).…”

Section: Log-likelihood Ratio Calculationmentioning

confidence: 99%

“…As seen from the figure, the channel encoding improves the BER performance of the MDS-IQM techniques remarkably. The system performing only (10) and (11) suffers from significant performance loss compared to the optimum system when especially N = 2. On the other hand, the performance of soft-decision decoder using the LLR values in ( 10)-( 13) is very close to that of the one using optimum LLR values in (7).…”

Section: Log-likelihood Ratio Calculationmentioning

confidence: 99%

“…On the other hand, modulation concepts based on a wellknown maximum distance separable (MDS) code are capable of outperforming the IM concepts in terms of error performance while having even less implementation complexity [10], [11]. These concepts use a simple MDS code over disjoint constellations to form codewords.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Simple Gray Coding and LLR Calculation for MDS Modulation Systems

Yarkin¹,

Coon²

2022

Preprint

Self Cite

View full text Add to dashboard Cite

Due to dependence between codeword elements, index modulation (IM) and related modulation techniques struggle to provide simple solutions for practical problems such as Gray coding between information bits and constellation points; and low-complexity log-likelihood ratio (LLR) calculations for channel-encoded information bits. In this paper, we show that a modulation technique based on a simple maximum distance separable (MDS) code, in other words, MDS modulation, can provide simple yet effective solutions to these problems, rendering the MDS techniques more beneficial in the presence of coding. We also compare the coded error performance of the MDS methods with that of the IM methods and demonstrate that MDS modulation outperforms IM.

show abstract

Section: Log-likelihood Ratio Calculationmentioning

confidence: 89%

Section: B Receivermentioning

confidence: 99%

Section: Log-likelihood Ratio Calculationmentioning

confidence: 99%

Section: Log-likelihood Ratio Calculationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Simple Gray Coding and LLR Calculation for MDS Modulation Systems

Yarkin¹,

Coon²

2022

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

Index and mode modulated orthogonal frequency division multiplexing with enhanced spectral efficiency

Sengupta

Dasgupta²,

Barman

2023

Trans Emerging Tel Tech

View full text Add to dashboard Cite

Index modulation aided orthogonal frequency division multiplexing (OFDM-IM) is a potential multicarrier transmission technique for wireless data transmission systems due to its attractive error performance and energy efficiency. However, it fails to cope with increasing demand of high data rate in upcoming mobile data services, mainly, due to the lower spectral efficiency.In this communication, an efficient transmission technique, called index and mode modulation OFDM, is proposed that delivers additional information through permutations of multiple modes and indexed bits patterns resulting in higher spectral efficiency. For the proposed technique, a low complexity log-likelihood ratio detector with suitable algorithm is designed and its computational complexity has been analysed. The simulation results indicate improved performance of this newly proposed scheme in terms of spectral efficiency, bit error rate, as well as energy efficiency over other existing index modulated and multiple mode based OFDM schemes, while maintaining considerably low computational complexity in detection. That proclaims the scheme as a potential transmission technique to meet the data transmission challenges in 5G and beyond.

show abstract