Subblock design aided orthogonal frequency division multiplexing with all index modulation using search algorithm

Shi, Yuxin; Lu, Xinjin; Luo, Junshan; Wang, Shilian

doi:10.1002/ett.4311

Cited by 2 publications

(2 citation statements)

References 25 publications

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“…In an IM system, additional information bits are transmitted through the indices of antennas, subcarriers, time slots, and/or channel states 18 . Since some part of the resources are used to achieve the same throughput as compared to nonindexed counterparts, IM also offers some advantages in terms of the implementation complexity and flexibility 19 . As a special case of IM, spatial modulation (SM) is also named as single‐RF MIMO and exploits the indices of multiple antennas to convey additional information bits along with the conventionally modulated data‐carrying symbols 20,21 .…”

Section: Introductionmentioning

confidence: 99%

“…18 Since some part of the resources are used to achieve the same throughput as compared to nonindexed counterparts, IM also offers some advantages in terms of the implementation complexity and flexibility. 19 As a special case of IM, spatial modulation (SM) is also named as single-RF MIMO and exploits the indices of multiple antennas to convey additional information bits along with the conventionally modulated data-carrying symbols. 20,21 The main asset of SM lies in the fact that it minimizes the number of active transmit antennas under definite performance constraints.…”

Section: Introductionmentioning

confidence: 99%

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Power permutation modulation in multiple‐input multiple‐output systems

Özyurt

Kucur

2021

Trans Emerging Tel Tech

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The forthcoming communications standards are conjectured to require unprecedentedly high spectral efficiency values. Motivated by this fact, we propose a new transmission scheme for multiple-input multiple-output systems, which is termed as power permutation modulation (PPM). In addition to the conventional data-carrying modulated symbols, some amount of extra information is conveyed in the distinct permutations of power allocation levels associated with the modulated symbols. The detection of the additional bits is performed by a power permutation recovery process at the receive side. Unlike the common approach, the power allocation is exploited as a new degree of freedom for carrying information without requiring any channel state information at the transmitter. The application of the introduced method is exemplified for zero-forcing beamforming and space-time block coding systems under digital phase modulation. It is shown that, without any important additional complexity, some notable signal-to-noise ratio gains (as large as 3 dB) are attained as compared to the standard approaches. An exact closed-form result on the bit error rate (BER) of the presented PPM scheme is provided. The obtained expression is used to obtain the optimum power allocation levels such that the overall BER is minimized.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Power permutation modulation in multiple‐input multiple‐output systems

Özyurt

Kucur

2021

Trans Emerging Tel Tech

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Null Subcarrier Index Modulation in OFDM Systems for 6G and Beyond

Eren

Akan

2021

Sensors

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Computational complexity is one of the drawbacks of orthogonal frequency division multiplexing (OFDM)-index modulation (IM) systems. In this study, a novel IM technique is proposed for OFDM systems by considering the null subcarrier locations (NSC-OFDM-IM) within a predetermined group in the frequency domain. So far, a variety of index modulation techniques have been proposed for OFDM systems. However, they are almost always based on modulating the active subcarrier indices. We propose a novel index modulation technique by employing the part of the transmitted bit group into the null subcarrier location index within the predefined size of the subgroup. The novelty comes from modulating null subcarriers rather than actives and reducing the computational complexity of the index selection and index detection algorithms at the transmitter and receiver, respectively. The proposed method is physically straightforward and easy to implement owing to the size of the subgroups, which is defined as a power of two. Based on the results of our simulations, it appeared that the proposed NSC-OFDM-IM does not suffer from any performance degradation compared to the existing OFDM-IM, while achieving better bit error rate (BER) performance and improved spectral efficiency (SE) compared to conventional OFDM. Moreover, in terms of computational complexity, the proposed approach has a significantly reduced complexity over the traditional OFDM-IM scheme.

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Subblock design aided orthogonal frequency division multiplexing with all index modulation using search algorithm

Cited by 2 publications

References 25 publications

Power permutation modulation in multiple‐input multiple‐output systems

Power permutation modulation in multiple‐input multiple‐output systems

Null Subcarrier Index Modulation in OFDM Systems for 6G and Beyond

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