IEEE Wireless Research Articles

IEEE Microwave and Wireless Components Letters

IEEE Microwave and Wireless Components Letters

IEEE Microwave and Wireless Components Letters information for authors

IEEE Microwave and Wireless Components Letters information for authors

Genetic Algorithm Applied to Planning IEEE 802.11g Networks

The problem of planning local wireless network IEEE 802.11g consists of automatically positioning and setting up wireless access points (APs) in order to provide access to the local network with the desired coverage and the required quality of service (QOS).In addition to the complexity of predicting the Quality of Service (QoS) of a network from the variables of the problem (positions, parameters and frequency of the APs), the planning of WLAN networks faces several difficulties. In particular, the location of APs and the allocation of frequencies. There is no single model to solve the problem of designing wireless local networks. Depending on the situations and the hypotheses studied, different criteria can be considered and expressed in terms of constraints to be observed or in terms of objectives to be optimized. The first distinction is to separate the financial criteria from the network quality criteria. The nature of these two criteria being fundamentally different. Then there are a variety of service quality criteria, but we can still group them into three main categories: coverage criteria, interference criteria and capacity criteria.. In this article, we will use an optimization method based on an algorithm of stochastic optimization, which is also based on the mechanisms of natural selection and of genetic. It is genetic algorithm. Our goal consist of minimizing the total interaction between the APs to perform the good choices when deploying a network 802.11g in a way that gives users signal-to-interference ratios (SIR) greater than the required threshold ß.

Performance Comparison of Turbo coder and low-density parity check codes

Wireless communication systems will suffer from the noise introduced in the channels. Channel codes are the essential part of wireless communication systems which help in detection and correction of errors due to the noise introduced in the channel. Turbo codes and LDPC codes are the Forward Error Correction (FEC) channel coding techniques which have the error correcting capability near to Shannon codes along with improvement in transmission rate and energy efficiency.Turbo codes were introduced in 1993[1]. LDPC codes were discovered in 1960 by R.Galleger in his Ph.D dissertation at MIT.They became implementable, after the discovery of Turbo codes[2]. The satellite communications such as DVB-RCS, telecommunications such as 3G, 4G, Wireless metropolitan standards IEEE 802.16(WiMax) uses turbo codes[3]. G.hn/G.9960 (ITU-T standard for networking over power lines, phone lines and coaxial cable), 802.3 an(10GBps ethernet over twisted pair), CMMB(China multimedia mobile broadcasting), DVB-S2/DVB-T2/DVB-C2(Digital video broadcasting , second generation), DMB-T/H(Digital video broadcasting), Wimax(IEEE 802.16e standard for microwave communications), 802.11n-2009(wi-Fi standard) are the few standards where the LDPC codes are employed.[4]

IEEE Microwave and Wireless Components Letters

IEEE Microwave and Wireless Components Letters

IEEE Microwave and Wireless Components Letters information for authors

IEEE Microwave and Wireless Components Letters information for authors

IEEE Wireless Power Transfer Conference

IEEE Wireless Power Transfer Conference

IEEE Microwave and Wireless Components Letters information for authors

IEEE Microwave and Wireless Components Letters information for authors

Exemplary Reviewers 2020

On behalf of the Editorial Board of the IEEE WIRELESS COMMUNICATIONS LETTERS, I would like to thank the exemplary reviewers, as listed below, who represent fewer than 3% of all our reviewers in 2020 for their dedicated services and high quality review work.

IEEE Microwave and Wireless Components Letters information for authors

IEEE Microwave and Wireless Components Letters information for authors

IEEE Microwave and Wireless Components Letters information for authors

IEEE Microwave and Wireless Components Letters information for authors

Wideband Circularly Polarized Cylindrical Dielectric Resonator Antennas With Rectangular Curved Slots [Antenna Applications Corner

Wideband circularly polarized antennas with wide axial-ratio (AR) bandwidth and required gain are desired for point-to-multipoint communication and remote tracking applications. Two different designs of probe-fed rectangular curved slotted dielectric resonator antenna (SDRA) models are proposed in this article, one with an overall size of 50 × 50 mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> (SDRA-1) and the other a scaled-down version with 25 × 25 mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> (SDRA-2). Axially symmetric rectangular curved slots are introduced in cylindrical dielectric resonator antennas (CDRAs) to create asymmetry in the structure for circular polarization (CP). The proposed SDRA-1 offers a wide impedance bandwidth of 55% (4.14-7.31 GHz) and a 3-dB AR bandwidth of 38% (4.82-7.07 GHz) with a minimum AR value of 0.1 dB. The peak gain obtained for SDRA-1 is 6 dBi. A scaled-down version of the dielectric resonator antenna (DRA) provides an impedance bandwidth of 57.5% (7.34-12.94 GHz), a 3-dB AR bandwidth of 0.76 GHz, and a peak gain of 5.52 dBi. The proposed DRA models are suitable for IEEE wireless standard 802.11ac Wi-Fi (5 GHz), IEEE 802.11a (5.2 GHz), IEEE 802.16d worldwide interoperability for microwave access (WiMax) and x-band applications.

Radio &amp; Wireless Week 2021 [From the Guest Editor's Desk

This focus issue of IEEE Microwave Magazine contains columns on topics being covered during IEEE Radio & Wireless Week 2021 (RWW 2021) and five overview feature articles dedicated to themes that represent the scope and purpose of the different subconferences within RWW. The five feature articles have been prepared by highly renowned authors in their research fields and address several timely technical topics, such as digital predistortion (DPD) in power amplifiers (PAs); integrated digital power amplifiers (DPAs) and transmitters; reflectionless filtering devices; emerging inkjet and 3D printing fabrication techniques for sensing, communication, and empowering tasks in modern Internet of Things (IoT) modules; and advanced receiver architectures with multiband, multifunction, and multimode operational capabilities.

IEEE Microwave and Wireless Components Letters information for authors

IEEE Microwave and Wireless Components Letters information for authors

Compact Multiband Microstrip Printed Slot Antenna Design for Wireless Communication Applications

In this paper, a compact multiband printed antenna is proposed to cover four resonant bands in the range of 1-6 GHz. The antenna structure is inspired from that of the classical multi-cavity magnetron resonator. The antenna comprises a slot annular ring structure in the ground plane of an Isola FR4 substrate having Ԑr = 3.5 and thickness h=1.5 mm. The outer circle of the annular ring is loaded with radial arranged small circular slots. On the opposite side of the substrate, the antenna is fed with a 50-Ohm microstrip line. To investigate the effect of different antenna elements on the antenna performance, a parametric study is conducted. The antenna is simulated, fabricated, and measured. The simulated 10 dB return loss bandwidths for the four resonant bands are 35% (1.53–2.11GHz), 14% (2.9–3.34GHz), 12% (4.2–4.75GHz), and 9% (4.94–5.39GHz), respectively. Thus, the antenna is a proper candidate for many in use bands of wireless systems (1.65, 3.14, 4.44, 5.24 GHz), including LTE-FDD, GNSS, GSM-450, W-CDMA/HSPA/k, 802.11a, and IEEE 802.11ac WLAN. The results indicate that the designed antenna has quad-band resonant responses with substantial frequency ratios of f4/f3, f3/f2 and f2/f1. Besides, the antenna offers reasonable radiation characteristics with a gain of 2.5, 4.0, 6.2, and 4.2 dBi, throughout the four resonant bands.

IEEE Microwave and Wireless Components Letters information for authors

IEEE Microwave and Wireless Components Letters information for authors

IEEE Microwave and Wireless Components Letters information for authors

IEEE Microwave and Wireless Components Letters information for authors

Optimizing channel allocation in WiMAX MIMO model using fuzzy game theory

The WiMAX (IEEE 802.16) network is meant to serve the requirement of prevalent broadband wireless network and present an affordable low maintenance substitute to the wired counterpart. Channel allocation for fully connected multi-radio wireless networks is a major research area for few years due to the challenges involved in it. In this paper, a hybrid multi-channel allocation in wireless IEEE802.16 network is formulated through game theory approach. In the channel allocation game, there can be too many strategies available, out of which only some of the strategies are feasible and the pay-offs are not known precisely. Since fuzzy based mathematics can be used to eliminate strategies which are impractical. An optimization technique for channel allocation using Fuzzy game theory is proposed. The simulation exhibit that the proposed FGCA (Fuzzy Game based Channel Allocation) notably diminishes the channel interference and enhance the comprehensive performance of the WiMAX system with respect to important network parameters like Channel acquisition delay, Channel utilization, Average throughput.

IEEE Microwave and Wireless Components Letters information for authors

IEEE Microwave and Wireless Components Letters information for authors

IEEE Microwave and Wireless Components Letters information for authors

IEEE Microwave and Wireless Components Letters information for authors