WiMAX MIMO Research Articles

Medical Surgical Video Recognition and Retrieval Based on Novel Unified Approximation

Video retrieval recognition is a linear characterized action constituted by many frame similarity-based videos. This medical video recognition and classification can be a great extent in medical research, such as Endoscopic, radiological, pathological, and applied health informatics. General Video Retrieval Recognition (GVRR) cannot address a problem with recognition alone. GVRR can be solving the Multi-Input-Multi-Output (MIMO) interface mixed video retrieval system. To generalize the conventional video retrieval interface like Multi-user MIMO, WiMAX MIMO, single-user MIMO, several types of research made excused. In fine-tuning existing video retrieval, this research gives the authentic procedure for a frame-based cognitive operation called Secure Approximation and sTability Based Secure Video Retrieval recognition (SAT-SR) recognition proposed. In this research article, the process of recognition has three processes generalized by the video retrieval system. Initially, the virtual dissection and connection weights of input video were established using the mathematical and numerical analysis of interpolation estimation. Secondly, the interpolation approximation and activation function were figured out using the Open Mcrypt Stimulus (oMs) for video security fragments. Similarly, systematic investigations are accomplished for approximation error computation. The result for this widely circulated utilization of three processes on the video retrieval recognition prevents the occurrence of the cybercrime abuse of stored video registers. The proposed technique was used to identify the virtual dissection, interpolation, and activation function for decoding the videos. Using this information, the abusers identified cybercrime rate might be reduced considerably.

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.

English

This paper presents the simulation and performance evaluation of WiMAX MIMO (worldwide interoperability for microwave access) system along with efficient wireless channels using real time data transmission. In order to visualize and understand the effects of real time environment over system performance, it is essential to analyze the real time fading channels i.e. Rayleigh channel and Rician channel. As in the real life scenario it is not possible to have unified distribution of fading over the entire communication channel. The present paper enhances the current status of WiMAX MIMO system along with the modelling of suitable wireless channels i.e. AWGR, Rayleigh and Rician in order to control BER of the system. Further with the variation of different channel parameters for real time data transmission through WiMAX MIMO system, the structure compatible to practical scenario can be implemented through this, Modelling using antenna diversity principles in order to control BER of the system. The central objective of this paper is to built up the real time model for the WiMAX MIMO system along with the suitable wireless channels compatible to various atmospheric conditions for the signal propagation.

Folded Monopole Antenna with Parasitic Element in Small Terminal for WiMAX and WLAN MIMO Systems

Folded Monopole Antenna with Parasitic Element in Small Terminal for WiMAX and WLAN MIMO Systems

Novel F-Shaped Quad-Band Printed Slot Antenna for WLAN and WiMAX MIMO Systems

A novel F-shaped microstrip slot antenna for WLAN and WiMAX multiple-input-multiple-output (MIMO) systems is presented. The proposed antenna structure consists of both open-ended and short-ended slots connected by a metal “via” to a microstrip line. The open-ended slot is exploited to obtain resonant mode at 2.4 GHz, and three short-ended slots are aimed to obtain resonant modes at 3.5, 5.2, and 5.8 GHz, whose center frequencies can be adjust by the slot lengths. The parametric studies show that the center frequencies are independent of each other. A four-element array configuration of the proposed antenna for MIMO applications is also studied. The simulation and measurement results of reflection coefficient, mutual coupling, and radiation pattern are presented, which attest to the applicability of antenna.

Computational Investigation and Design of Planar EBG Structures for Coupling Reduction in Antenna Applications

The uniplanar cross-like compact EBG structure is thoroughly assessed by means of a computational FEM-based eigenvalue analysis. A careful inspection of the dispersion diagram reveals the existence of a nearly-TEM mode that compromises the bandgap behavior, a fact that is also confirmed in coupling performance investigations. The structure is then modified and optimized to maximize the resulting bandgap zone, for mutual coupling reduction in WiMAX MIMO arrays.

MIMO-OFDMA Measurements; Reception, Testing, and Evaluation of WiMAX MIMO Signals With a Single Channel Receiver

The number of multiple-input-multiple-output (MIMO) orthogonal frequency-division multiple-access (OFDMA) systems is expected to sharply increase in the near future. Engineers who need to test these systems face two difficulties: 1) the lack of descriptive instructions to conduct reliable measurements and 2) the increased hardware cost due to the need for multiple transmitters and receivers. This paper first introduces all the measurable parameters of MIMO-OFDMA systems and provides a clear guide in performing the measurements specific to various parts of the system. Then, it proposes the implementation of the reception of MIMO-OFDMA signals using a single receiver rather than multiple receivers. For this purpose, impairments related to each of the radio frequency front-end components are investigated. The challenges of MIMO-OFDMA measurements are addressed in comparison with single-input single-output measurements. A complete procedure is provided to receive and perform impairment estimation for Worldwide Interoperability for Microwave Access (WiMAX) MIMO signals using a single receiver according to the IEEE 802.16 Standards.