Direct Data Detection of OFDM Signals Over Wireless Channels

Saci, Anas; Al-Dweik, Arafat; Shami, Abdallah

doi:10.1109/tvt.2020.3022054

Cited by 15 publications

(6 citation statements)

References 52 publications

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“…While spatial multiplexing can improve the link spectral efficiency, the use of linear receivers eliminates the diversity gain that can be obtained using MLD, which is usually avoided due to its high complexity. Therefore, capitalizing on our work in [41], we propose in this work a novel Direct Detection (DD)-MIMO receiver with the following features:…”

Section: B Motivation and Contributionmentioning

confidence: 99%

Near-Optimal Efficient MIMO Receiver for Miniature UAV-IoT Communications

Saci,

Al-Dweik,

Jimaa

2024

IEEE Open J. Veh. Technol.

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This article proposes a novel Direct Detection (DD) scheme for multiple-input multipleoutput (MIMO) unmanned aerial vehicle (UAV) communications where tedious, slow, and computationally demanding channel state information (CSI) estimation and detection processes are not required. The proposed detection scheme is achieved by exploiting the frequency and/or temporal correlation among the transmitted signals to directly extract the information symbols from the received signals. The results obtained show that the proposed scheme offers a significant advantage of approximately 15 dB performance gain compared to conventional linear detection schemes, even when such schemes are using perfect CSI. Furthermore, the proposed detection algorithm can be efficiently implemented using the Viterbi Algorithm, or its variants, to achieve further complexity reduction.INDEX TERMS Unmanned aerial vehicle (UAV), fading, diversity, sixth generation (6G), multiple-input multiple-output (MIMO), Internet of things (IoT), wireless sensor networks (WSNs).

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Section: B Motivation and Contributionmentioning

confidence: 99%

Near-Optimal Efficient MIMO Receiver for Miniature UAV-IoT Communications

Saci,

Al-Dweik,

Jimaa

2024

IEEE Open J. Veh. Technol.

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“…The DFT outputs r A and r B can be used to obtain the channel state information (CSI) for both channels, i.e., G AB and G BA . The process typically starts by estimating the CFR at the pilot subcarriers using techniques such as the leastsquare (LS) or minimum mean-square error (MMSE), and then interpolation can be used to compute the channel gains at the data subcarriers [46]. The communications between Alice and Bob are assumed to be conducted using TDD where the coherence time of the channel is larger than the TDD frame.…”

Section: Signal and Channel Modelsmentioning

confidence: 99%

High-Rate Secret Key Generation Using Physical Layer Security and Physical Unclonable Functions

Assaf

Al-Dweik

Iraqi

et al. 2023

IEEE Open J. Commun. Soc.

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Physical layer security (PLS) can be adopted for efficient key sharing in secured wireless systems. The random nature of the wireless channel and channel reciprocity (CR) are the main pillars for realizing PLS techniques. However, for applications that involve air-to-air (A2A) transmission, such as unmanned aerial vehicle (UAV) applications, the channel does not generally have sufficient randomness to enable reliable key generation. Therefore, this work proposes a novel system design to mitigate the channel randomness constraint and enable high-rate secret key generation (SKG) process. The proposed system integrates physically unclonable functions (PUFs) and CR principle to securely exchange secret keys between two nodes. Moreover, an adaptive and controllable artificial fading (AF) level with interleaving is used to mitigate the impact of low randomness variations in the wireless channel. The proposed system can operate efficiently even when the channel is nearly flat or time invariant. Consequently, the time required for generating and sharing a key is significantly shorter than conventional techniques. We also propose a novel bit extraction scheme that reduces the number of overhead bits required to share the intermediate keys.The obtained Monte Carlo simulation results show that a key agreement can be reached at the first trial for moderate and high signal-to-noise ratios (SNRs), which is substantially faster than other PLS techniques. Moreover, the results show that inducing AF into static channels reduces the mismatch ratio between the generated secret sequences and degrades the eavesdropper's capability to predict the secret keys.

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“…In general, the product of two independent Gaussian random variables X [52]. For Rician fading channels, such condition can be satisfied when the Rician factors K; K 1 dB.…”

Section: B Multiple Reflectors(n > 1)mentioning

confidence: 99%

Performance Analysis of Wireless Mesh Backhauling Using Intelligent Reflecting Surfaces

Al‐Jarrah

Alsusa

Al-Dweik

et al. 2021

IEEE Trans. Wireless Commun.

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This paper considers the deployment of intelligent reflecting surfaces (IRSs) technology for wireless multi-hop backhauling of multiple basestations (BSs) connected in a mesh topology. The performance of the proposed architecture is evaluated in terms of outage and symbol error probability in Rician fading channels, where closed-form expressions are derived and demonstrated to be accurate for several cases of interest. The analytical results corroborated by simulation, show that the IRS-mesh backhauling architecture has several desired features that can be exploited to overcome some of the backhauling challenges, particularly the severe attenuation at high frequencies. For example, using IRS with four elements, N = 4, provides a symbol error rate of about 10 5 at a signal-to-noise ratio of about 0 dB, even for a large number of hops. Moreover, the obtained analytical results corroborated by Monte Carlo simulation show that the gain obtained by increasing N decreases significantly for N > 5. For example, increasing N from 1 to 2 provides about 8 dB of gain, while the increase from 3 to 4 provides about 4 dB. Moreover, the degradation caused by the relaying process becomes negligible when the number of IR elements N = 3.

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Direct Data Detection of OFDM Signals Over Wireless Channels

Cited by 15 publications

References 52 publications

Near-Optimal Efficient MIMO Receiver for Miniature UAV-IoT Communications

Near-Optimal Efficient MIMO Receiver for Miniature UAV-IoT Communications

High-Rate Secret Key Generation Using Physical Layer Security and Physical Unclonable Functions

Performance Analysis of Wireless Mesh Backhauling Using Intelligent Reflecting Surfaces

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