Orthogonal frequency-division multiplexing ≈ Orthogonal frequency-division multiplexing
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Alternating Minimization Algorithms for Hybrid Precoding in Millimeter Wave MIMO Systems Open
Millimeter wave (mmWave) communications has been regarded as a key enabling technology for 5G networks, as it offers orders of magnitude greater spectrum than current cellular bands. In contrast to conventional multiple-input-multiple-outp…
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Index Modulation Techniques for Next-Generation Wireless Networks Open
International audience
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Index modulation techniques for 5G wireless networks Open
The increasing demand for higher data rates, better quality of service, fully\nmobile and connected wireless networks lead the researchers to seek new\nsolutions beyond 4G wireless systems. It is anticipated that 5G wireless\nnetworks, whi…
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Channel Estimation for Orthogonal Time Frequency Space (OTFS) Massive MIMO Open
Orthogonal time frequency space (OTFS) modulation outperforms orthogonal\nfrequency division multiplexing (OFDM) in high-mobility scenarios. One\nchallenge for OTFS massive MIMO is downlink channel estimation due to the large\nnumber of ba…
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Towards 10 Gb/s orthogonal frequency division multiplexing-based visible light communication using a GaN violet micro-LED Open
Visible light communication (VLC) is a promising solution to the increasing demands for wireless connectivity. Gallium nitride micro-sized light emitting diodes (micro-LEDs) are strong candidates for VLC due to their high bandwidths. Segme…
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Power Minimization-Based Robust OFDM Radar Waveform Design for Radar and Communication Systems in Coexistence Open
This paper considers the problem of power minimization based robust orthogonal frequency division multiplexing (OFDM) radar waveform design, in which the radar coexists with a communication system in the same frequency band. Recognizing th…
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Full-Duplex OFDM Radar With LTE and 5G NR Waveforms: Challenges, Solutions, and Measurements Open
This paper studies the processing principles, implementation challenges, and\nperformance of OFDM-based radars, with particular focus on the\nfourth-generation Long-Term Evolution (LTE) and fifth-generation (5G) New Radio\n(NR) mobile netw…
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Waveform and Numerology to Support 5G Services and Requirements Open
The standardization of the next generation 5G radio access technology has just started in 3GPP with the ambition of making it commercially available by 2020. There are a number of features that are unique for 5G radio access compared to th…
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OFDM Inspired Waveforms for 5G Open
As the standardization activities are being formed to lay the foundation of 5G wireless networks, there is a common consensus on the need to replace the celebrated OFDM by a more effective air interface that better serves the challenging n…
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Dual-Mode Index Modulation Aided OFDM Open
Index modulation has become a promising technique in the context of orthogonal frequency division multiplexing (OFDM), whereby the specific activation of the frequency domain subcarriers is used for implicitly conveying extra information, …
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Intelligent Reflecting Surface Assisted Multi-User OFDMA: Channel Estimation and Training Design Open
To achieve the full passive beamforming gains of intelligent reflecting surface (IRS), accurate channel state information (CSI) is indispensable but practically challenging to acquire, due to the excessive amount of channel parameters to b…
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Blue Laser Diode Enables Underwater Communication at 12.4 Gbps Open
To enable high-speed underwater wireless optical communication (UWOC) in tap-water and seawater environments over long distances, a 450-nm blue GaN laser diode (LD) directly modulated by pre-leveled 16-quadrature amplitude modulation (QAM)…
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Low Complexity Iterative Rake Decision Feedback Equalizer for Zero-Padded OTFS Systems Open
This paper presents a linear complexity iterative rake detector for the recently proposed orthogonal time frequency space (OTFS) modulation scheme. The basic idea is to extract and coherently combine the received multipath components of th…
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Sum-Rate Maximization for IRS-Assisted UAV OFDMA Communication Systems Open
IEEE In this paper, we consider the application of intelligent reflecting surface (IRS) in unmanned aerial vehicle (UAV)-based orthogonal frequency division multiple access (OFDMA) communication systems, which exploits both the significant…
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An Overview of the ATSC 3.0 Physical Layer Specification Open
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ComNet: Combination of Deep Learning and Expert Knowledge in OFDM Receivers Open
In this letter, we propose a model-driven deep learning (DL) approach that combines DL with the expert knowledge to replace the existing orthogonal frequency-division multiplexing receiver in wireless communications. Different from the dat…
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Low Complexity Modem Structure for OFDM-based Orthogonal Time Frequency Space Modulation Open
Orthogonal time frequency space (OTFS) modulation is a 2-D signaling technique that has recently emerged in the literature to tackle the time-varying (TV) wireless channels. OTFS deploys the Doppler-delay plane to multiplex the transmit da…
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Enabling Massive IoT in 5G and Beyond Systems: PHY Radio Frame Design Considerations Open
The parameters of physical layer radio frame for 5th generation (5G) mobile cellular systems are expected to be flexibly configured to cope with diverse requirements of different scenarios and services. This paper presents a frame structur…
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LED Based Wavelength Division Multiplexed 10 Gb/s Visible Light Communications Open
LED-based visible light communications can provide high data rates to users. This can be further increased by the use of wavelength division multiplexing using the different colours required to generate white light to transmit different da…
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Single-Carrier SM-MIMO: A Promising Design for Broadband Large-Scale Antenna Systems Open
The main limitations of employing largescale antenna (LSA) architectures for broadband frequency-selective channels include, but are not limited to their complexity, power consumption and the high cost of multiple radio frequency (RF) chai…
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15.73 Gb/s Visible Light Communication With Off-the-Shelf LEDs Open
Visible light communication (VLC) can provide high speed data transmission that could alleviate the pressure on the conventional radio frequency (RF) spectrum with the looming capacity crunch for digital communication systems. In this pape…
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On Multiple-Input Multiple-Output OFDM with Index Modulation for Next Generation Wireless Networks Open
Multiple-input multiple-output orthogonal frequency division multiplexing\nwith index modulation (MIMO-OFDM-IM) is a novel multicarrier transmission\ntechnique which has been proposed recently as an alternative to classical\nMIMO-OFDM. In …
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Multi-Carrier $M$-ary DCSK System With Code Index Modulation: An Efficient Solution for Chaotic Communications Open
A new multi-carrier M-ary differential chaos shift keying system with code index modulation, referred to as CIMMC-M-DCSK, is proposed in this paper. In the proposed CIMMC-M-DCSK system, the reference and information-bearing signals for eac…
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26 m/55 Gbps air-water optical wireless communication based on an OFDM-modulated 520-nm laser diode Open
We experimentally demonstrate a high-speed air-water optical wireless communication system with both downlink and uplink transmission employing 32-quadrature amplitude modulation (QAM) orthogonal frequency division multiplexing (OFDM) and …
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Super-Resolution Delay-Doppler Estimation for OFDM Passive Radar Open
In this paper, we consider the problem of joint delay-Doppler estimation of moving targets in a passive radar that makes use of orthogonal frequency-division multiplexing (OFDM) communication signals. A compressed sensing algorithm is prop…
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Subcarrier-Index Modulation Aided OFDM - Will It Work? Open
The achievable performance of subcarrier-index modulation (SIM) is analyzed in terms of its minimum Euclidean distance, constrained and unconstrained average mutual information, as well as its peak-to-average power ratio (PAPR). Our perfor…
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Flexible Radio Access Beyond 5G: A Future Projection on Waveform, Numerology, and Frame Design Principles Open
To address the vast variety of user requirements, applications, and channel conditions, flexibility support is strongly highlighted for 5G radio access technologies (RATs). For this purpose, usage of multiple orthogonal frequency division …
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BiLoc: Bi-Modal Deep Learning for Indoor Localization With Commodity 5GHz WiFi Open
In this paper, we study fingerprinting-based indoor localization in commodity 5-GHz WiFi networks. We first theoretically and experimentally validate three hypotheses on the channel state information (CSI) data of 5-GHz OFDM channels. We t…
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A Review of Partial Transmit Sequence for PAPR Reduction in the OFDM Systems Open
Orthogonal frequency division multiplexing (OFDM) is a superior technology for the high-speed data rate of wire-line and wireless communication systems. The OFDM has many advantages over other techniques such as its high capacity and immun…
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Point-to-Multipoint Optical Networks Using Coherent Digital Subcarriers Open
A paradigm shift in optical communication networks is proposed, with the introduction of a new ecosystem of devices and components with the capability of transforming current point-to-point optical networks (with their entailed, limiting, …