Adaptive OFDM‐IM for Enhancing Physical Layer Security and Spectral Efficiency of Future Wireless Networks

Furqan, Haji M.; Hamamreh, Jehad M.; Arslan, Hüseyin

doi:10.1155/2018/3178303

Cited by 19 publications

(17 citation statements)

References 34 publications

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“…Regarding the two-way information exchange processes, which are Figures 16 to 19, 1 achieves better secrecy trade-off performance than other users. This is also because of the order of user decoding process as described in (15) to (22) and (25) to (32). These observations are consistent with the derived analytical and asymptotic expressions.…”

Section: Figure 21supporting

confidence: 87%

“…It is also observed from Figure 8 and 9 that the untrustworthy relay terminal is being active roughly between −10 and 10 − 15 dB for the different users in the HD-based TWR case. The differences arise because of the user decoding process as described in (19), (20), (21),and (22). Beyond 15 dB, the untrustworthy relay terminal gets out of order and saturates.…”

Section: Figure 18mentioning

confidence: 99%

“…(3.351.3) the final CDF expression can be obtained as in (33). Likewise, following the same procedures as in (A1), the CDF expressions of (4), (5), (6), (9), (10), (11), (12), (15), (16), (17), (18), (19), (20), (21), (22), (25), (26), (27), (28), (29), (30), (31), and (32) can be calculated. However, because of space limitation, the derivation details of these CDF expressions are omitted.…”

Section: Appendix A: Proof Of Propositionmentioning

confidence: 99%

“…Li et al 21 investigate the resource allocation techniques to maximize the secure energy efficiency of OFDM-based FD relaying network. Furqan et al 22 propose and analyze algorithms for enhancing the PHY security of OFDM with index modulation systems. Yang et al 23 utilize the orthogonal frequency division multiple access (OFDMA) technique for the downlink network in the presence of a single eavesdropper.…”

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confidence: 99%

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Leakage rate analysis with imperfect channel state information for cooperative nonorthogonal multiple access networks

Özduran

2020

Int J Communication

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This paper investigates the imperfect channel state information that is caused by the channel estimation error and feedback delay effects on the leakage rate analysis for the cooperative nonorthogonal multiple access networks. The investigation considers a dual hop one-/two-way nonorthogonal multiple access-based information exchange process with the aid of half-/full-duplex untrustworthy wireless relaying network for the leakage rate analysis. The channel estimation error causes system coding gain losses while the feedback delay does not have any effect on the users' outage performance at untrustworthy relay terminal in low signal-to-noise ratio regimes. Conversely, the channel estimation error effects become negligible while the feedback delay causes system coding gain losses on the users' outage performance at untrustworthy relay terminal in high signal-to-noise ratio. Results also reveal that the untrustworthy relay terminal, which is under the effect of the channel estimation error and feedback delay, is being active between −10 and 25-30 dB. Beyond 25-30 dB, the untrustworthy relay terminal becomes out of order and saturates. The Monte Carlo-based simulation results are in agreement with the analytical and asymptotic derivations. KEYWORDScooperative communications, leakage rate analysis, nonorthogonal multiple access INTRODUCTIONWireless information exchange process has become vulnerable to cyber attacks. This is because of the open medium of wireless communication and broadcasting nature. This results in an information leakage on the legitimate terminals' information exchange process. The literature contains several types of techniques to mitigate the information leakage. Until Wyner's wiretap channels, 1 the secure information exchange processes were compensated with the help of the higher layer encryption techniques, which are data encryption standard (DES), 2 triple data ecryption standard (TDES), 3 Rivest-Shamir-Adleman (RSA), 4 and advanced encryption standard (AES). 5 The drawback of the aforementioned higher level encryption techniques is the receiver needs to have a secret key to decode the cipher text. Wyner showed that the physical layer (PHY) security could be an alternative solution to mitigate the information leakage. Friendly jammers and/or legitimate terminals send artificial noise/interference to confuse the illegitimate terminals. There are several other Abbreviations: LRA, leakage rate analysis; NOMA, nonorthogonal multiple access; CC, cooperative communications Int J Commun Syst. 2020;33:e4387.wileyonlinelibrary.com/journal/dac

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Section: Figure 21supporting

confidence: 87%

Section: Figure 18mentioning

confidence: 99%

Section: Appendix A: Proof Of Propositionmentioning

confidence: 99%

mentioning

confidence: 99%

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Leakage rate analysis with imperfect channel state information for cooperative nonorthogonal multiple access networks

Özduran

2020

Int J Communication

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“…By involving the concept of the permuted OFDM block, for T (k) < N we can express (22) in an alternative form: 6 One should note that the concept of permuted OFDM block introduced in analytical derivations is simply for facilitating the error performance analysis and expression of results, but will not amend the actual transmission procedure of enhanced OFDM-SNM.…”

Section: B Approximation Of Average Block Error Ratementioning

confidence: 99%

Enhanced Orthogonal Frequency-Division Multiplexing With Subcarrier Number Modulation

Dang

Shihada

et al. 2019

IEEE Internet Things J.

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A novel modulation scheme termed orthogonal frequency-division multiplexing with subcarrier number modulation (OFDM-SNM) has been proposed and regarded as one of the promising candidate modulation schemes for next generation networks. Although OFDM-SNM is capable of having a higher spectral efficiency (SE) than OFDM with index modulation (OFDM-IM) and plain OFDM under certain conditions, its reliability is relatively inferior to these existing schemes, because the number of active subcarriers varies. In this regard, we propose an enhanced OFDM-SNM scheme in this paper, which utilizes the flexibility of placing subcarriers to harvest a coding gain in the high signal-to-noise ratio (SNR) region. In particular, we stipulate a methodology that optimizes the subcarrier activation pattern (SAP) by subcarrier assignment using instantaneous channel state information (CSI) and therefore the subcarriers with higher channel power gains will be granted the priority to be activated, given the number of subcarriers is fixed. We also analyze the proposed enhanced OFDM-SNM system in terms of outage and error performance. The average outage probability and block error rate (BLER) are derived and approximated in closed-form expressions, which are further verified by numerical results generated by Monte Carlo simulations. The high-reliability nature of the enhanced OFDM-SNM makes it a promising candidate for implementing in the Internet of Things (IoT) with stationary machine-type devices (MTDs), which are subject to slow fading and supported by proper power supply.Index Terms-Orthogonal frequency-division multiplexing with subcarrier number modulation (OFDM-SNM), subcarrier assignment, reliability enhancement, outage performance analysis, error performance analysis.

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Orthogonal frequency division multiplexing with subcarrier power modulation for doubling the spectral efficiency of 6G and beyond networks

Hamamreh

Hajar

Abewa

2020

Trans Emerging Tel Tech

Self Cite

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With the emergence of new applications (eg, extended reality [XR] and haptics), which require to be simultaneously served not just with low latency and sufficient reliability, but also with high spectral efficiency, future networks (ie, 6G and beyond) should be capable of meeting this demand by introducing new effective transmission designs. Motivated by this, a novel modulation technique termed as orthogonal frequency division multiplexing with subcarrier power modulation (OFDM-SPM) is proposed for providing highly spectral-efficient data transmission with low-latency and less-complexity for future 6G wireless communication systems. OFDM-SPM utilizes the power of subcarriers in OFDM blocks as a third dimension to convey extra information bits while reducing both complexity and latency compared to conventional schemes. In this article, the concept of OFDM-SPM is introduced and its validity as a future adopted modulation technique is investigated over a wireless multipath Rayleigh fading channel. The proposed system structure is explained, an analytical expression of the bit error rate (BER) is derived, and numerical simulations of BER and throughput performances of OFDM-SPM are carried out. OFDM-SPM is found to greatly enhance the spectral efficiency where it is capable of doubling it. In addition, OFDM-SPM introduces negligible complexity to the system, does not exhibit error propagation, reduces the transmission delay, and decreases the transmission power by half.

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Adaptive OFDM‐IM for Enhancing Physical Layer Security and Spectral Efficiency of Future Wireless Networks

Cited by 19 publications

References 34 publications

Leakage rate analysis with imperfect channel state information for cooperative nonorthogonal multiple access networks

Leakage rate analysis with imperfect channel state information for cooperative nonorthogonal multiple access networks

Enhanced Orthogonal Frequency-Division Multiplexing With Subcarrier Number Modulation

Orthogonal frequency division multiplexing with subcarrier power modulation for doubling the spectral efficiency of 6G and beyond networks

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