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Performance Comparison of AODV and OLSR for MANET
Jintana Nakasuwan,Paitoon Rakluea 제어로봇시스템학회 2010 제어로봇시스템학회 국제학술대회 논문집 Vol.2010 No.10
In this paper present performance comparison of AODV and OLSR for mobile ad hoc network. Though mobile ad hoc network (MANET) routing protocols have been extensively studied through simulation. We perform extensive simulations using NS-2 simulator. In particular, We look at average throughput as performance parameters while varying various network parameters such as number of nodes and pause time under different area1000x1000 ㎡ and 1500x1500 ㎡. Our studies have shown that AODV better OLSR in terms of average throughput.
Performance Analysis of Channel Effective for Wireless LAN and Wireless Ad-Hoc Networks
Auttapon Pomsathit,Jintana Nakasuwan,Aekkarat Lorphichian,Chawalit Benjangkaprasert 제어로봇시스템학회 2008 제어로봇시스템학회 국제학술대회 논문집 Vol.2008 No.10
Wireless local area networks (WLANs) provide mobility and convenience to users, the efficiency of today"s WLANs are still far from satisfactory. In this paper discusses the performance of WLANs and wireless Ad-Hoc networks, our main contribution is analyze several methods to compare the throughput performance on simulation and experimental results. We describe NS-2 (Network Simulation) implementations for fine-tuning WLAN and wireless Ad-Hoc network parameters such as the physical layer (IEEE802.11) datalink layer (MAC) and network layer (Routing Protocol) related parameters. Customizing these parameters oppose to using the values specified in the standards will increase throughput and channel utilization under fixed load conditions.
A 3.5 GHz WiMAX Power Amplifier using Si-LDMOS
Paitoon Rakluea,Jintana Nakasuwan 제어로봇시스템학회 2008 제어로봇시스템학회 국제학술대회 논문집 Vol.2008 No.10
This paper describes the design a power amplifier for WiMAX applications at 3.5GHz using Si-LDMOS technology and is built on Epoxy-FR4 board with a dielectric constant of 4.5. To study the performance consisted of the design a linear Class A power amplifier which achieves the highest gain. Furthermore, all the simulations done in ADS simulator in order to optimize the design and to study performance. The design has shown an acceptable behaviour with a gain of 13.678 dB at 3.5 GHz. The achieved results given by the simulations have shown an excellent power performance which allows the use of that technology in the WiMAX systems.
Planar UWB Antenna with Single Band-Notched Characteristic
Paitoon Rakluea,Jintana Nakasuwan 제어로봇시스템학회 2010 제어로봇시스템학회 국제학술대회 논문집 Vol.2010 No.10
The planar UWB antenna with single band-notched characteristic is proposed. It is designed for Ultra-wideband wireless communications with a notch frequency response in the WLAN bands. The antenna consists of a rectangular slot etched out from the ground plane of a FR4 substrate (dielectric constant = 2.2) and a CPW-fed. The antenna is successfully designed, implemented and measured. The measured results show the proposed UWB antenna can achieve a return loss greater than 10dB from 3.02GHz to 11.05GHz with a single band-notched characteristic 4.85 GHz to 5.50 GHz.
Performance Analysis of Space diversity for OFDM transmission
Aekkarat Lorphichian,Auttapon Pomsathit,Jintana Nakasuwan,Thanupong Srikalsin,Chawalit Benjangkaprasert 제어로봇시스템학회 2008 제어로봇시스템학회 국제학술대회 논문집 Vol.2008 No.10
This paper presents a simple space diversity scheme for orthogonal frequency-division multiplexing (OFDM) transmission. Using multiple antenna technology provides the same diversity order as maximal-ratio receiver combining (MRRC). It is also shown that the scheme may easily be generalized to M transmit antennas and M receive antennas to provide a diversity order of 2M. We examine feasibility of several types of OFDM transmitter diversity techniques and generate data for the third-generation wireless systems. In particular, single input single output (SISO), single input multiple output (SIMO), multiple input single output (MISO), and multiple input multiple output (MIMO) techniques are compared. We employ the long range AWGN channel to enable transmitter diversity.
Controllable Band-Notched Slot Antenna for UWB Communication Systems
Weerathep Kueathaweekun,Noppin Anantrasirichai,Chawalit Benjangkaprasert,Jintana Nakasuwan,Toshio Wakabayashi 한국전자통신연구원 2012 ETRI Journal Vol.34 No.5
We propose a slot antenna consisting of a rectangular slot on the ground plane, fed by a microstrip line with a rectangular-ring-shaped tuning stub that can be deployed in ultra-wideband (UWB) communication systems to avoid interference with wireless local area network (WLAN) communication. Our antenna can achieve a single band-notched property from the 5 GHz frequency to the 6 GHz frequency owing to a controllable band notch that uses L- and J-shaped parasitic elements. The antenna characteristics can be modified to tune the band-notched property (4 GHz to 5 GHz or 6 GHz to 7 GHz) and the bandwidth of the band notch (1 GHz to 2 GHz). Furthermore, the shifted notch with enhanced width of the band notch from 1 GHz to 1.5 GHz is described in this paper. The UWB slot antenna and L- and J-shaped parasitic elements also provide the band-rejection function for reference in the WiMAX (3.5 GHz) and WLAN (5 GHz to 6 GHz) regions of the spectrum. Experiment results evidence the return loss performance, radiation patterns, and antenna gains at different operational frequencies.