Papers by Dr. Mahmood F Mosleh
Design and Investigation of LTE 3GPP Transceivers Based Wavelet Signals with Adaptive Antenna System
Journal of Al-Ma'moon College, 2014
The communication systems industry has been formulating new standards to efficiently deliver high... more The communication systems industry has been formulating new standards to efficiently deliver high speed broadband mobile access at low cost to operators and end users. Third Generation Partnership Project Long Term Evolution (3GPP LTE) is leading the pack towards forming the next-generation of mobile network standards. An Adaptive Antenna System (AAS) has been deployed at the receiver module to reduce the fading effects signal caused by proposed Stanford University Interim (SUI) Channel Models. AAS uses beamforming technique to focus the wireless beam between the base station and the subscriber station. The Least Mean Square (LMS) algorithm is used at the receiver to direct the main beam towards the desired LOS signal and nulls to the multipath signals. It has been proved through this thought by MATLAB simulations that the performance of the system important improves by AAS, where beamforming is implemented in the direction of desired user. The performance of the system can more improve by increasing the number of antennas at receiver.
Proceedings of the Proceedings of the 1st International Multi-Disciplinary Conference Theme: Sustainable Development and Smart Planning, IMDC-SDSP 2020, Cyperspace, 28-30 June 2020, 2020
Indoor position localization suffers from the regressive signal when the system implement based o... more Indoor position localization suffers from the regressive signal when the system implement based on Receive Signal Strength (RSS) and time synchronization when implement based on Time of Arrival (ToA). Those problems lead to high error in terms of position localization. To mitigate those errors many techniques and methods are deployed such as NLOS identification, Maximum Likelihood (ML), and weighted least-squares (WLS). In this paper, a new technique based on optimization of transmitter location has been proposed by separating the case study building into multi-zone, each zone having specific parameters which defer from other ones. The deployed receivers were 8 for the zones (A-F) and 20 into the zone G to be 68 for the whole system. There are three transmitters deployed with a changeable position to select a better one. The results confirm that the error improved from (0.638m) based on individual TOA to (0.136m) by using propose Multi-zone ToA, while improved from (0.756m) rely on individual RSS to (0.1223m) based on Multi-Zone RSS.
International Journal of Power Electronics and Drive Systems (IJPEDS), Dec 1, 2021
Spread spectrum (SS) communications have attracted interest because of their channel attenuation ... more Spread spectrum (SS) communications have attracted interest because of their channel attenuation immunity and low intercept potential. Apart from some extra features such as basic transceiver structures, chaotic communication would be the analog alternative to digital SS systems. Differential chaos shift keying (DCSK) systems, non-periodic and random characteristics among chaos carriers as well as their interaction with soft data are designed based on low-density parity-check (LDPC) codes in this brief. Because of simple structure, and glorious ability to correct errors. Using the Xilinx kintex7 FPGA development kit, we investigate the hardware performance and resource requirement tendencies of the DCSK communication system based on LDPC decoding algorithms (Prob. Domain, Log Domain and Min-Sum) over AWGN channel. The results indicate that the proposed system model has substantial improvements in the performance of the bit error rate (BER) and the real-time process. The Min-Sum decoder has relatively fewer FPGA resources than the other decoders. The implemented system will achieve 10-4 BER efficiency with 5 dB associate Eb/No as a coding gain.
Investigation of Millimeter-Wave Indoor Propagation at Different Frequencies
2019 4th Scientific International Conference Najaf (SICN), 2019
The characteristics of millimeter-wave (mmWave) multipath propagation based on the parameters of ... more The characteristics of millimeter-wave (mmWave) multipath propagation based on the parameters of path loss, delay spread and received power has been presented in this paper. The performance of different mmWave bands at 28, 39, 60 and 73 GHz for indoor communication has been included in this investigation and for both Line-of-Sight (LOS) and Non-Line-of-Sight (NLOS) scenarios. The effects of different building materials, frequency sensitivity materials and multi-floor indoor communications were the main considerations in this work. Such consideration has been carried out based on the calculation of each material parameters represented by relative permittivity and conductivity which obtained via software designed and clarified in this work. The results obtained from Wireless InSite software indicates that there is an inverse relationship between the separation distance and both the delay spread and received power. In contrast, path loss increase with increasing the separation distance due to many reasons related to antennas directionality and properties. Furthermore, Results obtained from multi-floor mmWave communication indicate that by using lower frequencies of 28 and 39 GHz, multi-floor effects on the investigated parameters have reduced the received power and increased the path losses to approximately its double values. Resulting in a valuable consideration for performing such deployment. While for 60 and 73 GHz, it shows ineffectiveness to be utilized for such communication.
Advanced Electromagnetics, 2020
The main challenges of MIMO design for future wireless communication is size reduction which lead... more The main challenges of MIMO design for future wireless communication is size reduction which leads to more mutual coupling. This paper deals with this problem in order to mitigate the impact of mutual coupling by proposing four elements MIMO prototype each one having a dual polarized patch rectangular microstrips. The idea is to insert annular rectangular opened one ribs in front of each microstrip and in corresponding to circular ring slot etched has etched in the ground. The advantage of such slot is to obtain regular radiation pattern distributed around device body. The four elements with eight ports are incorporated on 67×139 mm2 PCB with FR-4 dielectric layer. The single antenna is simulated CST.STUDIO 2019 resulting an operated frequency of 6.23 GHz with a band of 850 MHz (5.81-6.66) GHz at -10 dB. The fabrication MIMO system prototype is tested to show its measurement results which are match the simulated results. All results confirm of that proposed MIMO prototype which is o...
Indonesian Journal of Electrical Engineering and Informatics (IJEEI), 2021
Karrar Shakir Muttair, Ali Z. Ghazi Zahid, Oras A. Shareef Al-Ani, Ahmed Mohammed Q. ALAsadi, Mah... more Karrar Shakir Muttair, Ali Z. Ghazi Zahid, Oras A. Shareef Al-Ani, Ahmed Mohammed Q. ALAsadi, Mahmood F. Mosleh Department of Computer Techniques Engineering, College of Technical Engineering, The Islamic University, Najaf, Iraq. Department of Computer Engineering Techniques, Electrical Engineering Technical College, Middle Technical University, Baghdad, Iraq. Al-Najaf Al-Ashraf International Airport, Najaf, Iraq.
Effects of Antenna Directivity and Polarization on Indoor Multipath Propagation Characteristics for different mmWave frequencies
Informatica : Journal of Applied Machines Electrical Electronics Computer Science and Communication Systems, Mar 29, 2021
Journal of Techniques, 2021
Designing a localization system for an indoor environment faces more challenges because of multip... more Designing a localization system for an indoor environment faces more challenges because of multipath and interference problems. In this field, the most important techniques used for such environment, are RSS and ToA which need to be improved especially from more interference because of the huge multipath problems. In this paper, a case study of a selected building is chosen in order to apply the proposed technique of this research. Such proposal is based on the PT of the area in the case study into MZ. Each zone is allocated special values for the parameters used to estimate the target positions. WI package is used to simulate the case study area and apply such proposal based on RSS and ToA. The results confirm that the estimated locations are close to the real locations by the average error of (2.8) meter and (0.192) meter for ToA corresponding one zone and four zones respectively. In contrast, the results of our experiment show that the accuracy is improved from an average er...
Four-Port Wideband Circular Polarized MIMO Antenna for Sub-6 GHz Band
Proceedings of International Conference on Emerging Technologies and Intelligent Systems
Indoor environment propagation review
Computer Science Review
Performance Comparison of Multi-band Frequencies for Outdoor Communication
Springer Nature Switzerland AG 2020, 2019
A comparison between the performance of C-, S- and Millimeter Waves (mm-Waves) bands with differe... more A comparison between the performance of C-, S- and Millimeter Waves (mm-Waves) bands with different range of frequencies has been presented in this paper. To implement an outdoor communication network, which can satisfy the coverage requirement of signal propagation, an optimal design has been proposed using the Wireless InSite (WI) program. Comparison of measurements derived in the same outdoor environment but at different frequency bands including 28 and 73 GHz, which they related to 5G technique. The obtained results are compared according to other models with different bands including 2.4 GHz and 5 GHz for S- and C-bands, respectively. These ranges of frequencies are quite important for the development of channel models in a specific area. An algorithm has been formed in this work to calculate the probability of the best-received points. That means the points that achieved the highest received power, highest average signal quality (ASQ) and average received power (ARP) for each ...
Outdoor Millimeter-Wave Propagation Simulation Model for 5G Band Frequencies
IEEE, 2020
Design and implementation of wireless local area network for the specific region with fifth-gener... more Design and implementation of wireless local area network for the specific region with fifth-generation (5G) networks is one possibility to reach high speed, low power, and low latency. 5G technology is expected to officially launch across the world in the near future. As a contribution, the propagation of millimeter-wave (mm-wave) at different frequencies including 28, 39, 60 and 73 GHz has been studied in this paper. Wireless InSite program has been used to form a deterministic model for outdoor propagation in a specific campus according to the real geometric dimensions. The appropriate location has been identified for the transmitter that has a directional antenna. The surround receivers have been divided and distributed into two groups; the first located in a place without any barriers between them and the transmitter called LOS (Line-of-Sight). In contrast, the second group of the receivers is located in front of barriers that causing multiple reflections which called NLOS (Non-...
Outdoor to Indoor Wireless Propagation Simulation Model for 5G Band Frequencies
IOP Conference Series: Materials Science and Engineering
This paper analyses the signals propagation characteristics and the most important obstacles that... more This paper analyses the signals propagation characteristics and the most important obstacles that encountered these signals when transmitted from outdoor to indoor (O2I) antennas for the college buildings. These buildings consists of several floors and built in the 3D form according to the real dimensions. In this study, we used measurement analysis and a ray-tracing simulation model approach based on the use of the Wireless InSite (WI) software. The use of different frequencies related to the fifth generation (5G) which are 10, 17, 30 and 60 GHz. According to the results that appeared, it is observed the increase in frequency will lead to an increase in path loss, decrease the received signal strength (RSS). There is an inverse relationship between frequency increase and delay spread and an inverse relationship between frequency increase and received power. In addition, we noticed that there is a direct correlation between frequency increase and path loss, where increasing frequenc...
International Journal of Online and Biomedical Engineering (iJOE)
With the development of various wireless communication networks, Wi-Fi Router positioning and dep... more With the development of various wireless communication networks, Wi-Fi Router positioning and deployment systems have become widely popular in recent years to improve coverage in various environments. In this paper, we present an appropriate mechanism for defining the deployment of Wi-Fi Routers to improve coverage in the Oxford Languages Institute (OLI) environment. In addition, the institute's environment was simulated using the Wireless InSite (WI) Package. In this work, two types of Wi-Fi Routers are used. The first is the TP-Link, while the second is the Rocket. These two devices operate at 2.4 and 5 GHz frequencies. There are two objectives in this work. The first aim is to determine the best location to cover the simulated scene environment in a better way. The second aim is to compare Wi-Fi Routers to find out which Wi-Fi Router is better and find out how many Wi-Fi Routers we need to cover the institute's environment. The comparison between Wi-Fi Routers was based o...
Improving Indoor Localization System Using a Partitioning Technique Based on RSS and ToA
Designing a localization system for an indoor environment faces more challenges because of multip... more Designing a localization system for an indoor environment faces more challenges because of multipath and interference problems. In this field, the most important techniques used for such environment, are RSS and ToA which need to be improved especially from more interference because of the huge multipath problems. In this paper, a case study of a selected building is chosen in order to apply the proposed technique of this research. Such proposal is based on the PT of the area in the case study into MZ. Each zone is allocated special values for the parameters used to estimate the target positions. WI package is used to simulate the case study area and apply such proposal based on RSS and ToA. The results confirm that the estimated locations are close to the real locations by the average error of (2.8) meter and (0.192) meter for ToA corresponding one zone and four zones respectively. In contrast, the results of our experiment show that the accuracy is improved from an average er...
SM High Data Rate Transmission over Multipath Channel Using MIMO with LDPC
ZANCO Journal of Pure and Applied Sciences, 2016
The most important type of Multiple Input Multiple Output (MIMO) is the Spatial Multiplexing (SM)... more The most important type of Multiple Input Multiple Output (MIMO) is the Spatial Multiplexing (SM) which is used to increase the data rate depending on the number of transmitted and received antennas. The main challenge of SM is high Bit Error Rate (BER) at low Signal to Noise Ratio (SNR), which leads to increase the power expended. In this paper, the performance of MIMO system for Space Time Block Code (STBC) and SM has been investigated. We expected that the STBC increase the reliability of data rate but it can't increase the data rate, while SM increase the data rate with significant BER. The proposal of this research is to add effective channel code to reduce the BER in SM to achieve reliable data rate with the exploitation of SM potential to increase the speed of data. Low density Parity Check (LDPC) is become an effectiveness type of channel coding to improve the performance of wireless system in multipath environments. To avoid the higher complexity stem from adding such c...
Proceedings of the Proceedings of the 1st International Multi-Disciplinary Conference Theme: Sustainable Development and Smart Planning, IMDC-SDSP 2020, Cyperspace, 28-30 June 2020, 2020
MIMO antenna is the future elements which will operate with the 5G smartphone devices. In this re... more MIMO antenna is the future elements which will operate with the 5G smartphone devices. In this research, a model of MIMO system of four elements each has a dual-polarized port is proposed. In order to approach a preferred model to match the future application of wireless, two right-angle triangles with chord have a serrated shape is proposed. The partial ground is segmented to four elements corresponding to each proposed single antenna with a suitable shape. The results show that the operating frequency of each single antenna is 6.27 GHz and can cover 590 MHz (5.97 GHz-6.56 GHz) at -10dB with good isolation -26dB while the MIMO system operated at 6.13 GHz with 500 MHz covered a range of (5.9 - 6.4) GHz.
Home Energy Management System Based on Particle Swarm Optimization
Proceedings of the 2020 3rd International Conference on Robot Systems and Applications, 2020
In various countries, limited power from providers and high electricity tariffs have increased th... more In various countries, limited power from providers and high electricity tariffs have increased the prevalence of demand response programs and energy management systems. Home energy management system (HEMS) is a utility and environmental concern that requires urgent solutions. This study proposes a virtual house design that has an air conditioner (AC), refrigerator (REF), washing machine, and water pump. Inverter technology based on the power management algorithm is proposed to limit the power consumption of AC and REF. Moreover, particle swarm optimization is employed to support the HEMS and increase price and power savings. Results reveal a substantial increase of 29.24% in power savings. Importantly, the proposed system is applicable to any customer, residential or otherwise..
Determining the best location for indoor access point based on received signal strength
IOP Conference Series: Materials Science and Engineering, 2021
Recently, a massive demand for wireless communication for big data transfer has risen. However, t... more Recently, a massive demand for wireless communication for big data transfer has risen. However, the interface and high noise stem from a large number of wireless local area networks require a better improvement of our own wireless devices; one of the best solutions is to locate an optimal location for the access point to achieve good received signal strength. In this research, a case study of a large house is simulated using Wireless Insite software to find the optimum location of the access point to investigate better coverage area. In addition, the performance of wave propagation for frequencies of 2.4 GHz and 5 GHz are carried out to show the differences between them. The results help to find the optimum location that gives optimal coverage area. Also, the results show that using 5 GHz leads to significant attenuation in received power by about 12.744%; this means that the transmitted power of the 5 GHz has to be increased by the same percentage to achieve the same coverage area ...
Wideband Fractal Circular-Shaped Microstrip Patch Antenna for Recent Wireless Applications
2019 2nd International Conference on Electrical, Communication, Computer, Power and Control Engineering (ICECCPCE), 2019
this paper introduces a design of microstrip patch antenna using two techniques such as fractal g... more this paper introduces a design of microstrip patch antenna using two techniques such as fractal geometry and partial ground plane to increase the antenna bandwidth with a reduction in its size. FR4 substrate is used with dimensions (22×22) mm2, 1.5 thickness, 4.3 permittivity ϵr and 0.02 loss tangent. The type of feeding used to excite this antenna is microstrip line feed. An iterative method of fractal geometry up to the 2nd iteration is used in this design and taking the advantage of a self-similarity property of fractal geometry. The proposed model is investigated for different radius of circular-shaped patch Pr and ground plane length Lg and simulated using High-Frequency Structure Simulator (HFSS) Ver.14 software. The results of the simulation show that when Pr=7.5mm and Lg=4mm, it can achieve the optimum bandwidth with more reduction in reflection coefficient S11 values and good gain. The proposed model has the best impedance matching attained at the 2nd iteration, which equal...
Uploads
Papers by Dr. Mahmood F Mosleh