Index modulation techniques in OFDM relay systems for 5G wireless networks

Mrkic, Jovana; Kočan, Enis; Pejanović-Djurišić, Milica

doi:10.1109/tsp.2017.8075970

Cited by 18 publications

(21 citation statements)

References 10 publications

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“…This cooperative paradigm can well offset the inherent disadvantages of OFDM-IM. In [18], a primary numerical study of relay assisted OFDM-IM is first presented. In [19], relay assisted OFDM-IM is applied in cognitive radio (CR) networks.…”

Section: A Related Work Of Relay Assisted Ofdm-immentioning

confidence: 99%

OFDM-IM Based Dual-Hop System Using Fixed-Gain Amplify-and-Forward Relay With Pre-Processing Capability

Dang

Wen

et al. 2019

IEEE Trans. Wireless Commun.

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Orthogonal frequency-division multiplexing with index modulation (OFDM-IM) has recently attracted much researchers' attention due to its superior spectrum efficiency and reliability compared to the traditional OFDM. Cooperative decode-and-forward (DF) relaying has been incorporated with OFDM-IM, which provides a higher energy efficiency and better network coverage. However, it might not be feasible in realistic applications owing to the high system complexity and transmission delay rendered by complex decoding and channel estimation procedures. Therefore, in this paper, we propose a fixed-gain (FG) amplify-and-forward (AF) relay assisted OFDM-IM system, which does not need to perform complex decoding and channel estimation at the relay, but only requires a preprocessing capability at the relay, e.g., cyclic prefix (CP) removal and re-insertion. Therefore, the system complexity can be reduced and the forwarding delay as well as power consumption caused by processing at the relay also decline. We analyze the average outage probability, block error rate (BLER), and achievable rate of the proposed system and verify all analysis by numerical results. The proposed FG AF relay assisted OFDM-IM provides a simple solution to the implementation of OFDM-IM in new network paradigms, where nodes are simple, power-limited and/or complexity-limited. Index Terms-Orthogonal frequency-division multiplexing with index modulation (OFDM-IM), fixed-gain (FG) amplifyand-forward (AF) relaying, performance analysis, multi-carrier systems, the Internet of Things (IoT). I. INTRODUCTION

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Section: A Related Work Of Relay Assisted Ofdm-immentioning

confidence: 99%

OFDM-IM Based Dual-Hop System Using Fixed-Gain Amplify-and-Forward Relay With Pre-Processing Capability

Dang

Wen

et al. 2019

IEEE Trans. Wireless Commun.

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“…Study explained in the paper stated that to tackle the new confronts that 5G networks are expected to resolve, various modulation schemes have been projected, like filtering, shaping of calculated pulse, and pre-coding to lessen the out-of-band (OOB) leakage of signals obtained through OFDM. [7] Qazi Nuaman et al, IJRASET provided an analysis of technique which is suitable for the requirement of 5G Networks. Discussion which has been proposed in the paper stated that OFDM technique could not considered as an adequate method for 5g wireless networks due to some limitations like PAPR, OOB, and use of cyclic prefix (CP) which created the need for new waveforms candidates like UFMC, FBMC, and GFDM to get exploited in 5G air interfaces.…”

Section: A Literature Surveymentioning

confidence: 99%

Augmentation of Spectral Efficiency using APSK in FBMC to Assess High Data Rate

Rai¹,

Vyas²

2019

IJRTE

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There are various techniques which have been developed to improvise the modulation technique exploited in the system which were intended to enhance the data rate and bandwidth of the 5G network. Various researchers worked on OFDM modulation technique in order to enhance the efficiency as it is successfully working on 4G networks. Although utilization of OFDM in 5G networks will not provide the expected outcomes due to some flaws. This paper proposed a system that induced FBMC (Filter Bank Multi-Carrier) modulation technique which is capable of delivering higher spectral efficiency than OFDM. Proposed method employed APSK (Amplitude Phase Shift Modulation) for the modulation of sub carriers. The idea of implementing APSK in FBMC is to optimize the peak to average power ratio and also reduces bit error rate. The techniques proposed in the system, aimed to achieve high efficiency in terms of data rate and bandwidth with less power consumption. By using MATLAB all the simulations will be performed to analyze the results of spectral efficiency in terms of BER vs Eb/No (SNR) and power spectral density.

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“…Another attempt to further enhance the performance of OFDM-IM is to incorporate it with cooperative communications and relay networks [9]. It has also been found that such an incorporation is able to extend the coverage and improve the power efficiency [10]- [13] and even achieve spatial diversity when relay selection is applied [14], [15].…”

Section: Introductionmentioning

confidence: 99%

Full-Duplex Relay-Assisted Orthogonal Frequency-Division Multiplexing With Index Modulation

Zhao

Dang

Wang

2019

IEEE Systems Journal

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In this paper, we propose a full-duplex relay-assisted orthogonal frequency-division multiplexing (OFDM) with index modulation (OFDM-IM) system, in which a complete transmission from source to destination is forwarded by a full-duplex decode-and-forward (DF) relay. By introducing full-duplex relaying, we are able to achieve a higher end-to-end capacity, as long as the power of the residual self-interference (SI) can be mitigated to an appropriate level. To investigate the proposed system, we assume the maximum-likelihood (ML) detection is adopted at both relay and destination for decoding the received OFDM block. Then, we derive or approximate the average outage probability, block error rate (BLER) and end-to-end capacity in closed form. All analyses are verified by numerical results generated by Monte Carlo simulations and comparisons between half-duplex and full-duplex relaying schemes are also provided to show the performance superiority of the proposed system.

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Index modulation techniques in OFDM relay systems for 5G wireless networks

Cited by 18 publications

References 10 publications

OFDM-IM Based Dual-Hop System Using Fixed-Gain Amplify-and-Forward Relay With Pre-Processing Capability

OFDM-IM Based Dual-Hop System Using Fixed-Gain Amplify-and-Forward Relay With Pre-Processing Capability

Augmentation of Spectral Efficiency using APSK in FBMC to Assess High Data Rate

Full-Duplex Relay-Assisted Orthogonal Frequency-Division Multiplexing With Index Modulation

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