# IEEE Wireless Communications Letters

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• ### Power of Deep Learning for Channel Estimation and Signal Detection in OFDM Systems

Publication Year: 2018, Page(s):114 - 117
Cited by:  Papers (6)
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This letter presents our initial results in deep learning for channel estimation and signal detection in orthogonal frequency-division multiplexing (OFDM) systems. In this letter, we exploit deep learning to handle wireless OFDM channels in an end-to-end manner. Different from existing OFDM receivers that first estimate channel state information (CSI) explicitly and then detect/recover the transmi... View full abstract»

• ### Radio Channel Modeling for UAV Communication Over Cellular Networks

Publication Year: 2017, Page(s):514 - 517
Cited by:  Papers (13)
| | PDF (952 KB) | HTML

The main goal of this letter is to obtain models for path loss exponents and shadowing for the radio channel between airborne unmanned aerial vehicles (UAVs) and cellular networks. In this pursuit, field measurements were conducted in live LTE networks at the 800 MHz frequency band, using a commercial UAV. Our results show that path loss exponent decreases as the UAV moves up, approximating freesp... View full abstract»

• ### Optimal LAP Altitude for Maximum Coverage

Publication Year: 2014, Page(s):569 - 572
Cited by:  Papers (158)
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Low-altitude aerial platforms (LAPs) have recently gained significant popularity as key enablers for rapid deployable relief networks where coverage is provided by onboard radio heads. These platforms are capable of delivering essential wireless communication for public safety agencies in remote areas or during the aftermath of natural disasters. In this letter, we present an analytical approach t... View full abstract»

• ### Energy-Efficient Data Collection in UAV Enabled Wireless Sensor Network

Publication Year: 2018, Page(s):328 - 331
Cited by:  Papers (7)
| | PDF (330 KB) | HTML

In wireless sensor networks, utilizing the unmanned aerial vehicle (UAV) as a mobile data collector for the sensor nodes (SNs) is an energy-efficient technique to prolong the network lifetime. In this letter, considering a general fading channel model for the SN-UAV links, we jointly optimize the SNs' wake-up schedule and UAV's trajectory to minimize the maximum energy consumption of all SNs, whil... View full abstract»

• ### Low-Complexity Hybrid Precoding in Massive Multiuser MIMO Systems

Publication Year: 2014, Page(s):653 - 656
Cited by:  Papers (180)
| | PDF (349 KB) | HTML

Massive multiple-input multiple-output (MIMO) is envisioned to offer considerable capacity improvement, but at the cost of high complexity of the hardware. In this paper, we propose a low-complexity hybrid precoding scheme to approach the performance of the traditional baseband zero-forcing (ZF) precoding (referred to as full-complexity ZF), which is considered a virtually optimal linear precoding... View full abstract»

• ### Deep Learning-Based Channel Estimation for Beamspace mmWave Massive MIMO Systems

Publication Year: 2018, Page(s):852 - 855
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Channel estimation is very challenging when the receiver is equipped with a limited number of radio-frequency (RF) chains in beamspace millimeter-wave massive multiple-input and multiple-output systems. To solve this problem, we exploit a learned denoising-based approximate message passing (LDAMP) network. This neural network can learn channel structure and estimate channel from a large number of ... View full abstract»

• ### Price-Based Distributed Offloading for Mobile-Edge Computing With Computation Capacity Constraints

Publication Year: 2018, Page(s):420 - 423
Cited by:  Papers (1)
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Mobile-edge computing is a promising technology to enable real-time information transmission and computing by offloading computation tasks from wireless devices to network edge. In this letter, we propose a price-based distributed method to manage the offloaded computation tasks from users. A Stackelberg game is formulated to model the interaction between the edge cloud and users, where the edge c... View full abstract»

• ### 3-D Placement of an Unmanned Aerial Vehicle Base Station (UAV-BS) for Energy-Efficient Maximal Coverage

Publication Year: 2017, Page(s):434 - 437
Cited by:  Papers (28)
| | PDF (439 KB) | HTML

Unmanned aerial vehicle mounted base stations (UAV-BSs) can provide wireless services in a variety of scenarios. In this letter, we propose an optimal placement algorithm for UAV-BSs that maximizes the number of covered users using the minimum transmit power. We decouple the UAV-BS deployment problem in the vertical and horizontal dimensions without any loss of optimality. Furthermore, we model th... View full abstract»

• ### Low Power Wide Area Network Analysis: Can LoRa Scale?

Publication Year: 2017, Page(s):162 - 165
Cited by:  Papers (49)
| | PDF (371 KB) | HTML

Low power wide area (LPWA) networks are making spectacular progress from design, standardization, to commercialization. At this time of fast-paced adoption, it is of utmost importance to analyze how well these technologies will scale as the number of devices connected to the Internet of Things inevitably grows. In this letter, we provide a stochastic geometry framework for modeling the performance... View full abstract»

• ### Deep Learning for Massive MIMO CSI Feedback

Publication Year: 2018, Page(s):748 - 751
| | PDF (543 KB) | HTML

In frequency division duplex mode, the downlink channel state information (CSI) should be sent to the base station through feedback links so that the potential gains of a massive multiple-input multiple-output can be exhibited. However, such a transmission is hindered by excessive feedback overhead. In this letter, we use deep learning technology to develop CsiNet, a novel CSI sensing and recovery... View full abstract»

• ### Modeling Cellular-to-UAV Path-Loss for Suburban Environments

Publication Year: 2018, Page(s):82 - 85
Cited by:  Papers (4)
| | PDF (1376 KB) | HTML

Operating unmanned aerial vehicle (UAV) over cellular networks would open the barriers of remote navigation and far-flung flying by combining the benefits of UAVs and the ubiquitous availability of cellular networks. In this letter, we provide an initial insight on the radio propagation characteristics of cellular-to-UAV (CtU) channel. In particular, we model the statistical behavior of the path-l... View full abstract»

• ### Transmit Antenna Selection in MIMO Wiretap Channels: A Machine Learning Approach

Publication Year: 2018, Page(s):634 - 637
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In this letter, we exploit the potential benefits of machine learning in enhancing physical layer security in multi-input multi-output multi-antenna-eavesdropper wiretap channels. To this end, we focus on the scenario where the source adopts transmit antenna selection (TAS) as the transmission strategy. We assume that the channel state information (CSI) of the legitimate receiver is available to t... View full abstract»

• ### Relay Selection for Cooperative NOMA

Publication Year: 2016, Page(s):416 - 419
Cited by:  Papers (79)
| | PDF (283 KB) | HTML

This letter studies the impact of relay selection (RS) on the performance of cooperative non-orthogonal multiple access (NOMA). In particular, a two-stage RS strategy is proposed, and analytical results are developed to demonstrate that this two-stage strategy can achieve the minimal outage probability among all possible RS schemes, and realize the maximal diversity gain. The provided simulation r... View full abstract»

• ### Outage Analysis for Downlink NOMA With Statistical Channel State Information

Publication Year: 2018, Page(s):142 - 145
Cited by:  Papers (1)
| | PDF (497 KB) | HTML

Conventional non-orthogonal multiple access (NOMA) schemes assume perfect channel state information (CSI) at the transmitter side, which is nearly impractical for many communication scenarios. Instead, this letter considers a practical downlink NOMA system in the Nakagami-m fading channels, of which the transmitter only knows the statistical CSI associated with each user. We analyze the outage per... View full abstract»

• ### On the Ergodic Capacity of MIMO NOMA Systems

Publication Year: 2015, Page(s):405 - 408
Cited by:  Papers (144)
| | PDF (452 KB) | HTML

Non-orthogonal multiple access (NOMA) is expected to be a promising multiple access technique for 5G networks due to its superior spectral efficiency. In this letter, the ergodic capacity maximization problem is first studied for the Rayleigh fading multiple-input multiple-output (MIMO) NOMA systems with statistical channel state information at the transmitter (CSIT). We propose both optimal and l... View full abstract»

• ### Unmanned Aerial Vehicle-Aided Communications: Joint Transmit Power and Trajectory Optimization

Publication Year: 2018, Page(s):522 - 525
Cited by:  Papers (1)
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This letter investigates the transmit power and trajectory optimization problem for unmanned aerial vehicle (UAV)-aided networks. Different from majority of the existing studies with fixed communication infrastructure, a dynamic scenario is considered where a flying UAV provides wireless services for multiple ground nodes simultaneously. To fully exploit the controllable channel variations provide... View full abstract»

• ### Energy- and Spectral-Efficiency Trade-Off for D2D-Multicasts in Underlay Cellular Networks

Publication Year: 2018, Page(s):546 - 549
| | PDF (392 KB) | HTML

Underlay in-band device-to-device (D2D) multicast communication, where the same content is disseminated via direct links in a group, has the potential to improve the spectral and energy efficiencies of cellular networks. However, most of the existing approaches for this problem only address either spectral efficiency (SE) or energy efficiency (EE). We study the tradeoff between SE and EE in a sing... View full abstract»

• ### Contention-Based Access for Ultra-Reliable Low Latency Uplink Transmissions

Publication Year: 2018, Page(s):182 - 185
Cited by:  Papers (5)
| | PDF (406 KB) | HTML

We consider a sporadic ultra-reliable and low latency communications in the uplink 5G cellular systems. Reliable low latency access for randomly emerging packet transmission cannot be guaranteed in current wireless systems. To achieve the goal of low latency and high reliability simultaneously, we propose a contention-based transmission scheme aimed at users with small payloads. We seek to reduce ... View full abstract»

• ### Energy-Efficient Resource Allocation for Mobile Edge Computing-Based Augmented Reality Applications

Publication Year: 2017, Page(s):398 - 401
Cited by:  Papers (18)
| | PDF (419 KB) | HTML

Mobile edge computing is a provisioning solution to enable augmented reality (AR) applications on mobile devices. AR mobile applications have inherent collaborative properties in terms of data collection in the uplink, computing at the edge, and data delivery in the downlink. In this letter, these features are leveraged to propose a novel resource allocation approach over both communication and co... View full abstract»

• ### Joint Channel Estimation and Multiuser Detection for Uplink Grant-Free NOMA

Publication Year: 2018, Page(s):682 - 685
| | PDF (376 KB) | HTML

Grant-free non-orthogonal multiple access is an emerging research topic in machine-type communications, which is used to reduce signaling overhead. In this context, this letter introduces a novel joint channel estimation (CE) and multiuser detection (MUD) framework for the frame based multi-user transmission scenario where users are (in)active for the duration of a frame. First, considering the in... View full abstract»

• ### Random Access Preamble Design and Detection for 3GPP Narrowband IoT Systems

Publication Year: 2016, Page(s):640 - 643
Cited by:  Papers (27)
| | PDF (459 KB) | HTML

Narrowband Internet of Things (NB-IoT) is an emerging cellular technology that will provide improved coverage for massive number of low-throughput low-cost devices with low device power consumption in delay-tolerant applications. A new single tone signal with frequency hopping has been designed for NB-IoT physical random access channel (NPRACH). In this letter, we describe this new NPRACH design a... View full abstract»

• ### Minimum Cache Size and Backhaul Capacity for Cache-Enabled Small Cell Networks

Publication Year: 2018, Page(s):490 - 493
| | PDF (361 KB) | HTML

In cache enabled networks, either memory or backhaul is used to deliver files from a core network to a transmitter. To support a high level of wireless quality of service (QoS), network resources including small base stations, memory, and backhaul are required. In this letter, while satisfying a wireless QoS constraint, memory, and backhaul for the whole network are minimized. For a given density ... View full abstract»

• ### Uplink Transmissions in URLLC Systems With Shared Diversity Resources

Publication Year: 2018, Page(s):590 - 593
Cited by:  Papers (2)
| | PDF (594 KB) | HTML

5G features flagship use cases with ultra reliable low latency communication (URLLC), supported through high diversity. When multiple URLLC connections are only intermittently active, dedicating many diversity resources to a single connection leads to inefficient operation. We address this problem through shared diversity resources and compare it to per-link dedicated diversity. Two receiver types... View full abstract»

• ### Incentivizing Consensus Propagation in Proof-of-Stake Based Consortium Blockchain Networks

Publication Year: 2018, Page(s): 1
| | PDF (172 KB)

In proof-of-stake based consortium blockchain networks, pre-selected miners compete to solve a crypto-puzzle with a successfully mining probability proportional to the amount of their stakes. When the puzzle is solved, the miners are encouraged to take part in mined block propagation for verification to win a transaction fee from the blockchain user. The mined block should be propagated over wired... View full abstract»

• ### 3-D Placement of an Unmanned Aerial Vehicle Base Station for Maximum Coverage of Users With Different QoS Requirements

Publication Year: 2018, Page(s):38 - 41
Cited by:  Papers (2)
| | PDF (341 KB) | HTML

The need for a rapid-to-deploy solution for providing wireless cellular services can be realized by unmanned aerial vehicle base stations (UAV-BSs). To the best of our knowledge, this letter is the first in literature that studies a novel 3-D UAV-BS placement that maximizes the number of covered users with different quality-of-service requirements. We model the placement problem as a multiple circ... View full abstract»

• ### Strategic Densification With UAV-BSs in Cellular Networks

Publication Year: 2018, Page(s):384 - 387
| | PDF (768 KB) | HTML

Using base stations mounted on an unmanned aerial vehicle (UAV-BSs) is a promising new evolution of wireless networks for the provision of on-demand high data rates. While many studies have explored deploying UAV-BSs in a green field-no existence of terrestrial BSs, this letter focuses on the deployment of UAV-BSs in the presence of a terrestrial network. The purpose of this letter is twofold: 1) ... View full abstract»

• ### New SWIPT Using PAPR: How It Works

Publication Year: 2016, Page(s):672 - 675
Cited by:  Papers (10)
| | PDF (499 KB) | HTML

In this letter, we propose a new architecture for simultaneous wireless information and power transfer (SWIPT) which utilizes multi-sine waveforms for energy transfer and their distinct peak-to-average-power-ratios (PAPR) for information transmission. The new form of SWIPT proposed is based on an innovative idea of conveying information using the different levels of PAPR which can be measured at t... View full abstract»

• ### Coordinated Direct and Relay Transmission Using Uplink NOMA

Publication Year: 2018, Page(s):400 - 403
Cited by:  Papers (1)
| | PDF (424 KB) | HTML

A coordinated direct and relay transmission is proposed using uplink non-orthogonal multiple access (UP-NOMA). A two-user UP-NOMA scenario is considered, where a cell-center user directly communicates with a base station (BS), whereas a cell-edge user needs the assistance of a half-duplex decode-and-forward relay to communicate with the BS. The ergodic sum capacity of UP-NOMA is analyzed under bot... View full abstract»

• ### Environment-Aware Drone-Base-Station Placements in Modern Metropolitans

Publication Year: 2018, Page(s):372 - 375
Cited by:  Papers (2)
| | PDF (1603 KB) | HTML

Unmanned aerial vehicles, i.e., drones, have recently caught attention for providing on-demand capacity to wireless networks as drone-base-stations (drone-BSs). Many studies assume simplified channel models based on average characteristics of the environment to estimate the placement of drone-BSs. However, especially in urban areas, positioning of drone-BSs with respect to intersections and roof-t... View full abstract»

• ### Low Complexity Modem Structure for OFDM-Based Orthogonal Time Frequency Space Modulation

Publication Year: 2018, Page(s):344 - 347
| | PDF (448 KB) | HTML

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 data where the time variations of the TV channel are integrated over time and hence the equivalent channel relating the input and output of the system boils down t... View full abstract»

Publication Year: 2017, Page(s):774 - 777
Cited by:  Papers (8)
| | PDF (364 KB) | HTML

In this letter, we investigate an energy efficiency with performance guaranteed problem in mobile-edge computing. The mobile users desire lower energy consumption with better performance of tasks, for that we propose an energy minimizing optimization problem for mobile-edge cloud computing. We apply KKT conditions to solve it, and also present a request offloading scheme for this issue. In particu... View full abstract»

• ### Power Allocation for a Downlink Non-Orthogonal Multiple Access System

Publication Year: 2016, Page(s):532 - 535
Cited by:  Papers (29)
| | PDF (326 KB) | HTML

This letter investigates power allocation for a downlink non-orthogonal multiple access system with a base station and two users. We first formulate an optimization problem for the single-input single-output (SISO) case in terms of power allocation between two users for maximizing the sum capacity under a total power constraint and a quality-of-service condition that the minimum rate requirement o... View full abstract»

• ### Low-Dimensionality of Noise-Free RSS and Its Application in Distributed Massive MIMO

Publication Year: 2018, Page(s):486 - 489
Cited by:  Papers (1)
| | PDF (555 KB) | HTML

We examine the dimensionality of noise-free uplink received signal strength (RSS) in a distributed massive multiple-input multiple-output system. Upon applying principal component analysis to the noise-free uplink RSS data, we observe that it spans over a low-dimensional principal subspace. We make use of this unique property to propose a reconstruction-based Gaussian process regression (RecGP) me... View full abstract»

• ### Cyclical Multiple Access in UAV-Aided Communications: A Throughput-Delay Tradeoff

Publication Year: 2016, Page(s):600 - 603
Cited by:  Papers (32)
| | PDF (390 KB) | HTML

This letter studies a wireless system consisting of distributed ground terminals (GTs) communicating with an unmanned aerial vehicle (UAV) that serves as a mobile base station (BS). The UAV flies cyclically above the GTs at a fixed altitude, which results in a cyclical pattern of the strength of the UAV-GT channels. To exploit such periodic channel variations, we propose a new cyclical multiple ac... View full abstract»

• ### Low-Complexity Compressive Spectrum Sensing for Large-Scale Real-Time Processing

Publication Year: 2018, Page(s):674 - 677
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To overcome the challenges in high-speed sampling and processing of real-time spectrum measurement, compressive sensing (CS) theory has been implemented in wideband spectrum sensing. Moreover, to take full advantage of CS, the nonconvex Lv-norm minimization algorithms are employed to reconstruct the wideband signals from compressive samples. However, solving these algorithms usually lea... View full abstract»

• ### Probabilistic Omnidirectional Path Loss Models for Millimeter-Wave Outdoor Communications

Publication Year: 2015, Page(s):357 - 360
Cited by:  Papers (49)
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This letter presents a probabilistic omnidirectional millimeter-wave path loss model based on real-world 28 GHz and 73 GHz measurements collected in New York City. The probabilistic path loss approach uses a free space line-of-sight propagation model, and for non-line-of-sight conditions uses either a close-in free space reference distance path loss model or a floating-intercept path loss model. T... View full abstract»

• ### Resource Allocation for D2D Communications Underlaying a NOMA-Based Cellular Network

Publication Year: 2018, Page(s):130 - 133
Cited by:  Papers (3)
| | PDF (338 KB) | HTML

This letter investigates the power control and channel assignment problem in device-to-device (D2D) communications underlaying a non-orthogonal multiple access (NOMA) cellular network. With the successive interference cancellation decoding order constraints, our target is to maximize the sum rate of D2D pairs while guaranteeing the minimum rate requirements of NOMA-based cellular users. Specifical... View full abstract»

• ### Experimental Throughput Analysis of Low-THz MIMO Communication Channel in 5G Wireless Networks

Publication Year: 2016, Page(s):616 - 619
Cited by:  Papers (8)
| | PDF (1094 KB) | HTML

This letter presents first results of a Terahertz (THz) band line-of-sight 2 × 2 multiple-input multiple-output (MIMO) channel. The system architecture is based on a subharmonic mixer that translates the measuring frequency of vector network analyzer in the range of 298-313 GHz. The system uses a virtual antenna array technique to characterize a MIMO channel. The antenna element spacing is derived... View full abstract»

• ### Optimal Resource Allocation for Non-Orthogonal Transmission in UAV Relay Systems

Publication Year: 2018, Page(s):356 - 359
Cited by:  Papers (1)
| | PDF (483 KB) | HTML

A novel resource allocation (RA) algorithm for non-orthogonal transmission is proposed to maximize overall throughput of user equipments (UEs) in unmanned aerial vehicle (UAV) relay systems (URSs), which jointly optimizes transmit duration and power of signals at base station and UAV. Also, the proposed RA algorithm is shown to maximize the overall throughput of UEs while guaranteeing a seamless U... View full abstract»

• ### Energy-Efficient Power Allocation in Millimeter Wave Massive MIMO With Non-Orthogonal Multiple Access

Publication Year: 2017, Page(s):782 - 785
Cited by:  Papers (12)
| | PDF (383 KB) | HTML

In this letter, we investigate the energy efficiency (EE) problem in a millimeter wave massive MIMO system with non-orthogonal multiple access (NOMA). Multiple two-user clusters are formulated according to their channel correlation and gain difference. Following this, we propose a hybrid analog/digital precoding scheme for the low radio frequency chains structure at the base station. On this basis... View full abstract»

• ### Tighter Bounds on the Gaussian $Q$ Function and Its Application in Nakagami- ${m}$ Fading Channel

Publication Year: 2017, Page(s):574 - 577
Cited by:  Papers (3)
| | PDF (773 KB) | HTML

In this letter, using the Trapezoidal rule of numerical integration, we propose simpler and tighter approximations for the Gaussian Q function. These can be efficiently applied to compute the integrals in symbol error probability (SEP) expressions of various digital modulation schemes over additive white Gaussian noise as well as fading channels. Using the proposed approximations, we present a clo... View full abstract»

• ### Information Prediction and Dynamic Programming-Based RAN Slicing for Mobile Edge Computing

Publication Year: 2018, Page(s):614 - 617
| | PDF (528 KB) | HTML

In 5G networks, mobile edge computing (MEC) and radio access network (RAN) slicing can support the evolving services and satisfy the diverse service requirements efficiently, thereby, being promising technologies. In this letter, the work is focused on the RAN slicing between MEC services and traditional services. An information prediction and dynamic programming based RAN slicing algorithm is pro... View full abstract»

• ### Spatio-Temporal Wireless Traffic Prediction With Recurrent Neural Network

Publication Year: 2018, Page(s):554 - 557
| | PDF (586 KB) | HTML

Accurate prediction of user traffic in cellular networks is crucial to improve the system performance in terms of energy efficiency and resource utilization. However, existing work mainly considers the temporal traffic correlation within each cell while neglecting the spatial correlation across neighboring cells. In this letter, machine learning models that jointly explore the spatio-temporal corr... View full abstract»

Publication Year: 2018, Page(s): 1
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Deep learning (DL), despite its enormous success in many computer vision and language processing applications, is exceedingly vulnerable to adversarial attacks. We consider the use of DL for radio signal (modulation) classification tasks, and present practical methods for the crafting of white-box and universal black-box adversarial attacks in that application. We show that these attacks can consi... View full abstract»

• ### Full-Duplex Wireless-Powered Relay With Self-Energy Recycling

Publication Year: 2015, Page(s):201 - 204
Cited by:  Papers (143)
| | PDF (318 KB) | HTML

This letter studies a wireless-powered amplify-and-forward relaying system, where an energy-constrained relay node assists the information transmission from the source to the destination using the energy harvested from the source. We propose a novel two-phase protocol for efficient energy transfer and information relaying, in which the relay operates in full-duplex mode with simultaneous energy ha... View full abstract»

• ### Multi-User Detection Using ADMM-Based Compressive Sensing for Uplink Grant-Free NOMA

Publication Year: 2018, Page(s):46 - 49
| | PDF (264 KB) | HTML

Non-orthogonal multiple access (NOMA) is considered a primary candidate addressing the challenge of massive connectivity in fifth generation wireless communication systems. In this letter, we propose a low-complexity NOMA mechanism with efficient multi-user detection (MUD) based on the adaptive alternating direction method of multipliers, which is able to jointly detect user activity and transmitt... View full abstract»

• ### Resource Allocation for a Wireless Powered Integrated Radar and Communication System

Publication Year: 2018, Page(s): 1
| | PDF (559 KB)

The integrated radar and communication system is promising in the next generation wireless communication networks. However, its performance is confined by the limited energy. In order to overcome it, a wireless powered integrated radar and communication system is proposed. An energy minimization problem is formulated subject to constraints on the radar and communication performances. The energy be... View full abstract»

• ### Deep Neural Networks for Linear Sum Assignment Problems

Publication Year: 2018, Page(s): 1
| | PDF (223 KB)

Many resource allocation issues in wireless communications can be modeled as assignment problems and can be solved online with global information. However, traditional methods for assignment problems take a lot of time to find the optimal solutions. In this letter, we solve the assignment problem using machine learning (ML) approach. Specifically, the linear sum assignment problems (LSAPs) are sol... View full abstract»

• ### Energy-Efficient Optimization for Wireless Information and Power Transfer in Large-Scale MIMO Systems Employing Energy Beamforming

Publication Year: 2013, Page(s):667 - 670
Cited by:  Papers (115)
| | PDF (133 KB) | HTML

In this letter, we consider a large-scale multiple-input multiple-output (MIMO) system where the receiver should harvest energy from the transmitter by wireless power transfer to support its wireless information transmission. The energy beamforming in the large-scale MIMO system is utilized to address the challenging problem of long-distance wireless power transfer. Furthermore, considering the li... View full abstract»

• ### On the Sum Rate of MIMO-NOMA and MIMO-OMA Systems

Publication Year: 2017, Page(s):534 - 537
Cited by:  Papers (13)
| | PDF (286 KB) | HTML

In this letter, the performance of non-orthogonal multiple access (NOMA) is compared with conventional orthogonal multiple access (OMA) over multiple-input multiple-output (MIMO) channels. It is proved analytically that for a simple scenario of two users, MIMO-NOMA dominates MIMO-OMA in terms of both sum rate and ergodic sum rate. Furthermore, for a more practical scenario of multiple users, with ... View full abstract»

## Aims & Scope

IEEE Wireless Communications Letters publishes short papers in a rapid publication cycle on advances in the state-of-the-art of wireless communications. Both theoretical contributions (including new techniques, concepts, and analyses) and practical contributions (including system experiments and prototypes, and new applications) are encouraged. This journal focuses on the physical layer and the link layer of wireless communication systems.

Full Aims & Scope

## Meet Our Editors

Editor-in-Chief
Wei Zhang
The University of New South Wales