Presents the table of contents for this issue of the publication.

Presents a listing of the editorial board, board of governors, current staff, committee members, and/or society editors for this issue of the publication.

Presents a listing of the editorial board, board of governors, current staff, committee members, and/or society editors for this issue of the publication.

Presents the table of contents for this issue of the publication.

Presents a listing of the editorial board, board of governors, current staff, committee members, and/or society editors for this issue of the publication.

Presents a listing of the editorial board, board of governors, current staff, committee members, and/or society editors for this issue of the publication.

Presents the table of contents for this issue of the publication.

Presents a listing of the editorial board, board of governors, current staff, committee members, and/or society editors for this issue of the publication.

Novel congestion control algorithms, like Google’s TCP BBR, have been designed using wired-bottleneck models. Therefore, they do not achieve efficient performance over Wi-Fi paths due to frame-aggregation mechanisms adopted by standard IEEE 802.11n/ac/ax technologies that break the standard model. In this work, we analyze the performance characteristics of a Wi-Fi bottleneck, investigating the throughput

Presents a listing of the editorial board, board of governors, current staff, committee members, and/or society editors for this issue of the publication.

The application of a nonuniform nested array provides a simple way for underdetermined direction of arrival (DOA) estimation, enabling us to develop a suited self-calibration algorithm for perturbed nested array. The key points of this algorithm contain two steps: a first step is to obtain gain-phase errors estimation by utilizing partly calibrated array and properly choosing the elements of fourth-order

This letter investigates the problem of locating a moving target using bistatic range (BR) and bistatic range rate (BRR) measurements in multi-input and multi-output (MIMO) radar systems. The proposed estimator constructs two separate semidefinite programming (SDP) problems, in which both the BR and BRR measurement noise powers can be neglected. By utilizing the optimization toolbox, we efficiently

To monitor wireless suspicious transmissions, we propose an intelligent reflecting surface enabled legitimate monitoring system. In the system, the monitor employs the passive reflection for constructive or destructive signal forwarding. For constructive passive reflection, we maximize the average monitoring rate by approximating the cumulative distribution function of outage probability at the suspicious

Presents the table of contents for this issue of the publication.

Presents a listing of the editorial board, board of governors, current staff, committee members, and/or society editors for this issue of the publication.

Presents a listing of the editorial board, board of governors, current staff, committee members, and/or society editors for this issue of the publication.

Network slicing aims to efficiently provision diversified services with distinct requirements over the same physical infrastructure. Therein, in order to efficiently allocate resources across slices, demand-aware inter-slice resource management is of significant importance. In this letter, we consider a scenario that contains several slices in a radio access network with base stations that share the

Energy management and power allocation policy is considered for energy harvesting (EH) communications. In this letter, we propose a joint optimization problem with the continuous EH time and transmit power to maximize the long-term throughput based on deep deterministic policy gradient (DDPG). However, the joint optimization problem leads to a large continuous action space. In order to reduce the dimension

Multiple-input multiple-output (MIMO) is a favorable technique that can improve system capacity and performance through spatial multiplexing. However, the performance gets degraded over the correlated wireless channels. In this letter, we consider a point-to-point MIMO system and jointly optimize both the precoding matrix and the difference between two transmit vectors to resist transmit correlation

This letter studies the rate-equivocation region of a degraded signal-dependent noise wiretap channel (SDGN-WC), where the noise is Gaussian. This signal-dependent noise occurs in optical wireless communication (OWC) settings based on intensity modulation and direct detection (IM-DD). In this setup, the transmitted signals are nonnegative and are restricted by an average optical power constraint. We

Locally recoverable codes (LRCs) have a great significance in distributed storage systems, and have received considerable attention in recent years. In particular, it is a challenging task to construct optimal $(r,\delta)$ -LRCs, meaning $(r,\delta)$ -LRCs whose minimum distances attain Singleton-type bound. In this letter, we investigate the construction of a family of optimal $(r,\delta)$ -LRCs via

In this letter, we propose a joint processing method of spatial and temporal information from L-shaped sparse array (LSA) for two-dimensional (2-D) direction of arrival (DOA) estimation. In particular, either of the two subarrays in LSA can be any type of linear sparse array. With the proposed method, we can construct a virtual planar sparse array first, whose corresponding 2-D difference coarray owns

This letter presents ZIP (zero-effort ZI gBee P roximity detection), a novel technique to detect the proximity of two Internet-of-Things devices. Based on the ZigBee technology, ZIP embodies the first zero-effort solution by differing from existing ones that resort to the use of tailor-made hardware, multiple antenna installments, the employment of a third-party device, or user involvement. At the

The Doppler effect severely degrades the orthogonality of orthogonal frequency division multiplexing (OFDM) systems, and is a severe problem in the underwater acoustic (UWA) communications, leading to nonuniform Doppler shifts for all subcarriers. In order to alleviate Doppler effect, resampling technique by oversized fast Fourier transform (FFT) can achieve fast and accurate resampling in frequency

Echelon-Ferrers is an important method to improve lower bounds for constant-dimension codes, which can be applied on various parameters. Fagang Li combined the linkage construction and echelon-Ferrers to obtain some new lower bounds of constant-dimension codes. In this letter, we generalize this linkage construction to obtain new lower bounds.

This letter presents a construction flow for rate-compatible LDPC (RC-LDPC) codes, collaboratively using both extension and splitting schemes. In addition to the decoding threshold used for selecting the degree distribution, a new metric, known as the Average ACE ( $A^{2}CE$ ) value, is introduced in order to estimate the Tanner graph connectivity. The proposed collaborative scheme provides more flexibility

The performance of conventional online fountain codes is feedback dependent. In this letter, an analysis of online fountain codes is conducted to assess their performance under limited feedback conditions. To obtain a feedback point selection scheme with approximately optimal overhead performance when the number of feedbacks is fixed, two heuristic table-look-up strategies are proposed. The simulation

Generalized integrated interleaved (GII) codes have attracted increasing research interests in distributed storage systems, since they can achieve a good tradeoff between correction capability and locality. A GII code can be characterized by a conversion matrix that satisfies a specific constraint. In the literature, only two- and three-layer GII codes have been proposed, as it is not easy to construct

In this letter, a three-dimensional (3D) joint estimation algorithm which is the variable-step hill-climbing algorithm based on two-step weighted least squares (VHC-2WLS) is proposed. The VHC-2WLS combines bistatic range (BR), time difference of arrival (TDOA) and Doppler shift (DS) to improve the estimation accuracy of the position and velocity of a moving target in the multistatic radar system (MRS)

In this letter, an alternating iterative adaptive approach (AIAA) for direction of arrival (DOA) estimation via acoustic vector sensor (AVS) array under directivity bias is proposed. Firstly, the directivity bias parameter is introduced into the signal model. An AIAA is then developed to estimate the sparse signal and the directivity bias matrix iteratively. In each iteration, in order to eliminate

In this letter, two-dimensional (2D) direction of arrival (DOA) estimation using one-dimensional (1D) nested array motion is studied, and an improved Discrete Fourier transform (DFT) algorithm is proposed. Exploiting nested array to move vertically along its axis enables 2D DOA estimation with large-scale and hole-free difference co-array. DFT algorithm has lower complexity than multiple signal cl

In this letter, a machine learning approach is proposed to cancel the interference from multiple sources in the concurrent spectrum access (CSA) model of the cognitive Internet of Things (C-IoT). We assume that the C-IoT system is non-cooperative with the primary user (PU) system, and has little knowledge on the interference caused by PU transmitters. In order to recover the C-IoT signal under power

Optical buffering is one of the essential functions in optical packet switching (OPS) network. This letter employs optical code-division multiple-access (OCDMA) signals of spectral-amplitude-coding (SAC) in a packet-buffering architecture. In the proposed scheme, the original OCDMA label of the incoming packet is identified and converted to a new label by a code-switching system. As multiple packets

The existing phase shifter models adopted for reconfigurable intelligent surfaces (RISs) have ignored the electromagnetic (EM) waves propagation behavior, thus cannot reveal practical effects of RIS on wireless communication systems. Based on the equivalent circuit, this letter introduces an angle-dependent phase shifter model for varactor-based RISs. To the best of our knowledge, this is the first

In this study, power-domain non-orthogonal multiple access (NOMA) is combined with zero-forcing (ZF) vertical Bell Labs layered space-time (V-BLAST) technique. Motivated by the fact that the successive interference cancellation (SIC) is a pivotal element in either technique, we thoroughly investigate the impact of SIC on inter-user and inter-layer interference. A two-user downlink scenario is investigated

In this letter, we investigate the ergodic capacity of the intelligent reflecting surface (IRS)-assisted communication system with quantization phase errors, which is different from existing works assuming ideal continuous or discrete phases. The ergodic capacity, however, does not admit an exact closed-form expression if not impossible. In order to gain insight into the capacity performance, the impact

In distributed storage, erasure codes provide fault-tolerance while reducing the storage overhead compared to replication. The network traffic cost during the repair of node failures, called repair bandwidth, is an important metric in code design. Regenerating codes are a class of erasure codes developed with the aim of reducing the repair bandwidth while maintaining a high level of fault-tolerance

By assuming signal propagation speed to be unknown, a convex rank unconstrained semidefinite programming (RUSDP) algorithm is designed to obtain the unified solution for near-field and far-field TDOA-based localization. Then the rank constrained semidefinite programming (RCSDP) is further proposed by availing of the rank constraint. The simulations show the validity of the RUSDP and RCSDP algorithms

The rich mobile data and edge computing enabled wireless networks motivate to deploy artificial intelligence (AI) at network edge, known as edge AI , which integrates wireless communication and machine learning. In communication, data bits are equally important, while in machine learning some data bits are more important. Therefore we can allocate more radio resources to the more important data and

In this letter, we analyze ergodic capacity (EC) and outage probability (OP) for threshold-based selective cooperative non-orthogonal multiple access (TBS-C-NOMA) which has been proposed as a reliable alternative to conventional C-NOMA networks. We derive exact expressions for EC and OP in closed-forms and the theoretical analyses are validated via computer simulations. The trade-off for TBS-C-NOMA

In array signal processing, source-sensor amplitude responses are in general assumed to be in equality and signal parameters are estimated by exploiting spatial phase difference caused by propagation delay. This is unrealistic when sources are located in the near-field of the array. In near field, array sensors’ amplitude responses are inversely proportional to the radial distance from the sources

This letter investigates the optimal sensor placement strategy for single static target localization using the hybrid received-signal-strength (RSS), angle-of-arrival (AOA) and time-of-arrival (TOA) measurements on the 2-dimensional (2D) plane. Firstly, the problem formulation is introduced. Secondly, the theoretical smallest trace of the Cramér-Rao lower bound (CRLB), which is equivalent to the smallest

Recent advancements in machine learning for communications show that channel autoencoders could revolutionize conventional communication systems through end-to-end optimization. For channel autoencoders to reliably transmit over the air, a scheme to enable adaptive use of resources is needed. Thus, we propose ConvAE-Advanced, an improved channel autoencoder structure that can adaptively transmit across

Analyzing and recognizing radar signals are important tasks for effective Electronic Support Measurement (ESM) system operation. The electromagnetic environment is highly complex nowadays, however, resulting in non-uniformed distributed pulse streams. The high-dimensional features of the radar emitters are also overly complicated. Isolating useful information of the pulse streams and removing noise

Recently, a new family of polar codes, termed interleaved polar (i-polar) codes, was proposed. It has been shown that both i-polar codes and polar codes of the same block length generate the same synthesized channels. Therefore, conventional bit channel selection algorithms designed for polar codes can be employed for i-polar codes. However, since most of the bit channel selection algorithms are optimized

We consider the communication between a source (user) and a receiver in the presence of multiple jammers, and study resource assignment in a non-cooperative game theory framework using communication latency as the user’s utility. Equilibrium strategies are found in closed form, and their uniqueness is proven. This allows one to identify jammers whose equilibrium strategies have an on/off structure

In this letter, we present a novel and important performance metric for analyzing and evaluating the physical layer security of wireless communication systems in the presence of eavesdropping users. Specifically, we introduce the concept of amount of secrecy loss and derive the expressions that can quantify the severity of loss in systems with eavesdropping users. In addition, a new method for calculating

Moving contents proximity to the network edge and proactively caching popular contents at multiple infrastructures are promising directions for solving the backhaul congestion problem. This letter proposes and evaluates a multi-level cache-enabled network, where cache-hit users can fetch their data from the available cache at either small base-stations, unmanned aerial vehicles, or cache-enabled mobile

An approximate method for evaluation of the reliability of the symbol subchannels induced by a polarizing transformation with non-binary kernels is proposed. We show that if polar codes are combined with the channel adapter, the capacities of the subchannels can be estimated recursively.

In this letter, we always assume that $n$ is an odd integer, $\Bbb F_{q}$ is a finite field of characteristic 2, and $D_{2n}$ is a dihedral group of $2n$ elements, i.e., $D_{2n}=\langle x,y|x^{n}=1, y^{2}=1, yxy=x^{-1}\rangle $ . We give self-dual group codes with parameters in the finite dihedral group algebra $\Bbb F_{q}[D_{2n}]$ . Some numerical examples are also presented to illustrate our main

Two arrays form a periodic complementary pair if the sum of their periodic autocorrelations is a delta function. Finding such pairs, however, is challenging for large arrays whose entries are constrained to a small alphabet. One such alphabet is the quaternary set which contains the complex fourth roots of unity. In this letter, we propose a technique to construct periodic complementary pairs defined

Due to the urgent and unpredictable nature of disaster relief, emergency management systems (EMS) faces an enormous challenge of real-time data analysis without the complete information from emergency communication networks (ECNs). In this letter, we propose an incomplete information based two-tier game model (IITG) to realize collaborative computing at the edge of ECNs, which incentivizes idle computing

Beam selection can alleviate the requirement on the number of radio frequency (RF) chains in lens array-assisted millimeter Wave (mmWave) multiple-input multiple-output (MIMO) systems. This letter investigates the performance of joint user and beam selection in a multi-user discrete lens arrays (DLA) communication system. To reap the maximum throughput, we jointly optimize the beam selection and user

Spatial modulation (SM) unveils a new spatial constellation dimension for increasing the throughput of multi input multi output (MIMO) systems. In quadrature SM (QSM), each of the real and imaginary parts of the M-ary complex symbol activate an antenna independently, to achieve higher bits per channel use (bpcu). In this letter, we propose a structured multiplexing of several QSM symbols in each transmission

In this letter, we present the $\alpha $ - $\eta $ - $\mathcal {F}$ and $\alpha $ - $\kappa $ - $\mathcal {F}$ composite fading distributions. The two distributions generalize the two well-known composite fading distributions, namely the $\eta $ - $\mu $ /inverse gamma and the $\kappa $ - $\mu $ /inverse gamma distributions. For both distributions, we derive new exact closed-form expressions for the

In LTE and NR, the user equipment initiates a recovery procedure when a radio link failure (RLF) is declared. A shorter RLF timer T312 is introduced to speed up the recovery from an RLF and lower the outage time during a handover. However, T312 cannot remove the outage time completely and guarantee a successful recovery. In this letter, an event-based faster RLF trigger scheme is proposed to remedy

Practical codes for the Gaussian wiretap channel are designed aiming at satisfying information-theoretic metrics to ensure security against a passive eavesdropper (Eve). Specifically, a design criterion is introduced for the coset coding scheme in order to satisfy a strong secrecy condition described with the mutual information between the secret message and Eve’s observation. In addition, mutual information

Multiple-Input Multiple-Output (MIMO) is one of the key technology components in the fifth generation communication (5G). Inevitably, the growing antenna number in a limited space makes mutual coupling (MC) effect severely influence the system performance of wireless communication. Therefore, accurate MC modeling is of great significance to eliminate MC effects. To this end, we propose a new MC modeling

Visible light communication (VLC) has emerged as a potential wireless connectivity solution for infrastructure-to-vehicle networks where street lights can be configured to serve as access points. In this letter, we propose dynamic soft handover algorithm based on coordinated multipoint (CoMP) transmission. The proposed algorithm takes the rate of change in the received power as an input and accordingly

We propose an SNR estimation procedure for systems that transmit frequency-multiplexed analog signals in a channel. It is agnostic to the type of radio signal transmitted, can be performed without increasing the required bandwidth, and without interrupting the transmission of the signals. We simulate the transmission of frequency-multiplexed OFDM signals in an optical channel with intensity modulation