-
Performance Analysis of a 5G Compatible Windowing and Overlapping Scheme Implemented Hybrid Precoded mmWave Massive MIMO NC- OFDM System
Jinia Rahman,
Aniqa Tahsin,
Shaikh Enayet Ullah
Issue:
Volume 2, Issue 2, December 2018
Pages:
5-15
Received:
16 October 2018
Accepted:
31 October 2018
Published:
21 November 2018
DOI:
10.11648/j.ajece.20180202.11
Downloads:
Views:
Abstract: Non-continuous orthogonal frequency division multiplexing (NC-OFDM) can be considered as a promising technique for obtaining significant sidelobe suppression in baseband OFDM signaling. In this paper, we have conducted an investigative study on the performance analysis of a 5G compatible Windowing and overlapping (WO) scheme implemented mmWave massive MIMO NC-OFDM wireless communication system. In such 32×256 massive MIMO antenna configured Hybrid Precoded and 3D beamforming scheme implemented simulated system, various signal detection (Group detection (GD) approach aided and Cholesky decomposition (CD) based efficient Zero-Forcing (ZF)), modern channel coding (LDPC, and (3, 2) SPC)) and windowing and overlapping for Out-of-band(OOB) power spectral reduction techniques have been implemented with higher order digital modulations (64-QAM, 128- QAM and 256-QAM). On consideration of color image transmission in constructed 3D geometrical mmWave Massive MIMO fading channel, it is observable from MATLAB based simulation study that the (3, 2) SPC) channel encoded simulated system is quite robust and effective in retrieving color image under utilization of Cholesky decomposition (CD) based efficient Zero-Forcing (ZF) signal detection techniques. The impact of tapering of Tukey (tapered cosine) window and various order of digital modulations on system performance in terms of Bit error rate(BER) have also been assessed critically. Additionally, it is noticeable that implementation of 2D image noise filtering technique enhances the quality of retrieved color image.
Abstract: Non-continuous orthogonal frequency division multiplexing (NC-OFDM) can be considered as a promising technique for obtaining significant sidelobe suppression in baseband OFDM signaling. In this paper, we have conducted an investigative study on the performance analysis of a 5G compatible Windowing and overlapping (WO) scheme implemented mmWave mass...
Show More
-
Fingerprint Verification System Using Combined Minutiae and Cross Correlation Based Matching
Akinleye Okedola Akinyele,
Adegbola Jamiu Sarumi,
Badmus Abdulsamad,
Olawole Olakunle Green
Issue:
Volume 2, Issue 2, December 2018
Pages:
16-26
Received:
22 May 2018
Accepted:
20 June 2018
Published:
27 November 2018
DOI:
10.11648/j.ajece.20180202.12
Downloads:
Views:
Abstract: An effective system to verify human identity is a major challenge in most traditional access control systems in developing countries, as it can easily be compromised. From the vulnerability of banking transactions to the multiple registration in most civic identification projects like voters’ registration, Payroll System and Pension Scheme underscores the urgent need for an effective system that provide immediate technological solution. This research work presents an Automated Fingerprint Verification System simulating both Minutiae Based Matching and Cross Correlation Coefficient Matching that provides an effective and efficient means of verifying human identity which significantly decreases the possibility of fraud in access control. The method used MATLAB simulation to align the minutiae of the two-fingerprint image (query template) and stored templates (reference template) inputted to find the total number of minutiae matched. After alignment, two minutiae are considered for matching when spatial distance and direction difference between them are not up to a given tolerance. Finally, the templates were further verified with cross correlation algorithm to improve the result accuracy. This approach has better performance as compared to individual matching technique. The result obtained after testing several fingerprints for identification proved to be efficient by verifying correctly the identities of the persons enrolled and achieving a matching score above 80% threshold for Matching Pair and below 80% threshold for Non-Matching Pair.
Abstract: An effective system to verify human identity is a major challenge in most traditional access control systems in developing countries, as it can easily be compromised. From the vulnerability of banking transactions to the multiple registration in most civic identification projects like voters’ registration, Payroll System and Pension Scheme undersco...
Show More
-
The Importance of Use of Solar Energy
Tulakov Jahongir Turakul Uglu
Issue:
Volume 2, Issue 2, December 2018
Pages:
27-30
Received:
19 November 2018
Accepted:
5 December 2018
Published:
14 January 2019
DOI:
10.11648/j.ajece.20180202.13
Downloads:
Views:
Abstract: Nowadays, much attention is paid to the usage of solar energy. Solar energy, in addition to traditional energy, is ecologically clean while changing. Today, the demand for electricity and thermal energy is becoming increasingly urgent all over the world. This can be explained by the fact that researchers can reduce the burden of traditional energy resources (oil, coal, gas), increase their cost, ecological disturbances, and so on. Therefore, one of the key issues is to build solar panels that are economical and practical in their application. This requires the development of existing equipment and the research of modern variants of various constructive schemes.
Abstract: Nowadays, much attention is paid to the usage of solar energy. Solar energy, in addition to traditional energy, is ecologically clean while changing. Today, the demand for electricity and thermal energy is becoming increasingly urgent all over the world. This can be explained by the fact that researchers can reduce the burden of traditional energy ...
Show More
-
Solving Initial Value Problems by Flower Pollination Algorithm
Fatima Ouaar,
Naceur Khelil
Issue:
Volume 2, Issue 2, December 2018
Pages:
31-36
Received:
20 November 2018
Accepted:
13 December 2018
Published:
14 January 2019
DOI:
10.11648/j.ajece.20180202.14
Downloads:
Views:
Abstract: Differential equations are very important in modeling many phenomena mathematically. The aim of this paper is to consider Initial Value Problems (IVPs) in ordinary differential equations (ODEs) as an optimization problem, solved by using a meta-heuristic algorithm which is considered as an alternative way to find numerical approximation of (IVPs) since they can almost be solved simply by classical mathematical tools which are not very precise. By selecting a methodical way based on the use of recent and efficient algorithm, that is, Flower Pollination Algorithm (FPA), inspired by the pollination process of flowers plants to solve approximately an (IVP) when a specified example is selected that is the exponential problem which have an imperative role to describe many real problems. The effectiveness of the proposed method is tested via a simulation study between the exact results, the FPA results and Euler method which is considerate as a classical tool to solve numerically an (IVP). The final results and after a comparison between the performance of FPA and Euler method in terms of solution quality shows that FPA yields satisfactorily precise approximation of the solution. That ensures the ability of FPA to solve such important problems and highly complexes problems efficiently with minimal error.
Abstract: Differential equations are very important in modeling many phenomena mathematically. The aim of this paper is to consider Initial Value Problems (IVPs) in ordinary differential equations (ODEs) as an optimization problem, solved by using a meta-heuristic algorithm which is considered as an alternative way to find numerical approximation of (IVPs) s...
Show More
-
Investigation of the Dynamic Stability for a Light Aircraft
Samuel David Iyaghigba,
Aminu Hamza,
Andrew Ebiega Ogaga
Issue:
Volume 2, Issue 2, December 2018
Pages:
37-55
Received:
22 November 2018
Accepted:
11 December 2018
Published:
15 January 2019
DOI:
10.11648/j.ajece.20180202.15
Downloads:
Views:
Abstract: The dynamic stability of a light aircraft is very crucial at all phases of flight. This may include takeoff, climb, cruise, loiter, descend and landing where the aircraft is subjected to intense pressure from aerodynamic forces and moments. Control surfaces and flight control systems are therefore, used to control and pilot the aircraft to safe flight. The dynamic behavior of the aircraft can be simulated if an appropriate model of the aircraft is generated with a view to predicting the amount of force required to control the actuators that would actuate the control surfaces and make the aircraft stable from a disturbance. In this research paper, the dynamic stability of a light aircraft called the Air Beetle (ABT- 18) was investigated where the geometry of the aircraft was inputted in Athena Vortex Lattice (AVL) Software using X downstream, Y outright wing and Z up coordinates. The objective was to investigate how stable the aircraft will be on the longitudinal and lateral directions respectively. A model of the aircraft was created with dimensionless aerodynamic coefficients based on trim flight condition of cruise speed 51.4m/s at 12,000ft altitude. The aircraft airframe configuration and specification was inputted in AVL and aerodynamic stability coefficients were produced. The simulation was carried out in the graphic environment of Matlab Simulink, where block models of the aircraft were formed. Thereafter, transfer functions were obtained from the solutions of the light aircraft equations of motions. Pole placement method was used to test the dynamic stability of the aircraft and it was found to be laterally stable on the longitudinal axis and longitudinally stable on the lateral axis. Thus, the dynamic stability controls of the aircraft were achieved in autopilot design by implementing PID controllers’ successive loops and it was found that the ABT-18 aircraft had satisfied the conditions necessary for longitudinal and lateral stabilities.
Abstract: The dynamic stability of a light aircraft is very crucial at all phases of flight. This may include takeoff, climb, cruise, loiter, descend and landing where the aircraft is subjected to intense pressure from aerodynamic forces and moments. Control surfaces and flight control systems are therefore, used to control and pilot the aircraft to safe fli...
Show More
-
Feeder Reconfiguration and Distributed Generator Placement in Electric Power Distribution Network
Issue:
Volume 2, Issue 2, December 2018
Pages:
56-63
Received:
23 November 2018
Accepted:
13 December 2018
Published:
15 January 2019
DOI:
10.11648/j.ajece.20180202.16
Downloads:
Views:
Abstract: Power system deregulation and shortage of transmission capacities have led to an increase interest in Distributed Generations (DGs) sources. The optimal location of DGs in power systems is very important for obtaining their maximum potential benefits. A novel approach is proposed in this paper for placement of Distributed Generation (DG) units in reconfigured distribution system with the aim of reduction of real power losses while satisfying operating constraints. This paper presents an efficient method for feeder reconfiguration associated with DG allocation in radial distribution networks for active power compensation by reduction in real power losses and enhancement in voltage profile. Modified plant growth simulation algorithm has been applied successfully to minimize real power loss because it does not require barrier factors or cross over rates because the objectives and constraints are dealt separately. The main advantage of this algorithm is continuous guiding search along with changing objective function because power from distributed generation is continuously varying so this can be applied for real time applications with required modifications. The proposed system has been implemented with different scenarios on 33 bus Yamethin distribution system.
Abstract: Power system deregulation and shortage of transmission capacities have led to an increase interest in Distributed Generations (DGs) sources. The optimal location of DGs in power systems is very important for obtaining their maximum potential benefits. A novel approach is proposed in this paper for placement of Distributed Generation (DG) units in r...
Show More
