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A Comprehensive Survey on Routing Schemes
for High Speed Networks
--Veenu Pondwal and Himanshi Saini
It is observed that the impact of network failures is more pronounced in high speed networks. To maintain optimal network performance parameters, it is essential to deal with network routing in an efficient manner. To maintain network survivability after occurrence of failures, the routing technique implemented for high speed network should work for failure-prone networks. In this paper, a comprehensive survey of existing routing techniques in optical networks, such as Ad hoc On-Demand Distance Vector (AODV) routing, Destination Sequenced Distance Vector (DSDV) routing protocol, Dynamic Source Routing (DSR), Zone Routing Protocols (ZRP), Temporally Ordered Routing Algorithm (TORA), and Greedy Perimeter Stateless Routing (GPRS) protocol, has been presented. Each routing technique has its limitations and advantages. Implementation of a particular technique in a network is dependent on the size of the network, geographical area and network performance desired. Network performance is measured through various parameters such as Packet Delivery Ratio (PDR), link throughput, link bandwidth, delay, throughput, etc.
© 2016 IUP. All Rights Reserved.
Performance Analysis of MIMO Detection Schemes
for M-Ary QAM Modulation
--V K Chaubey, Girish Kakalwar and P C Hariprasad
Implementation of orthogonal space time coding to gain ultimate bandwidth efficiency at higher bitrate is an attractive choice to exploit the capability of Multi-Input Multi-Output (MIMO) system in wireless faded environment. The paper presents a suitable mathematical model to evaluate the performance of such a receiver under Zero Forcing (ZF) and Singular Value Decomposition (SVD) schemes for two different configurations of 2 x 2 and 3 x 3 MIMO structures. The model has been tested to evaluate the performance of 16-QAM and 64-QAM modulation schemes to establish the superior performance of SVD scheme over ZF especially at low SNR. The paper also reports comparative performance of Symbol Error Rate (SER) with respect to SNR for QPSK, 16-QAM and 64-QAM schemes to understand the qualitative and quantitative inferences for a suitable practical design.
© 2016 IUP. All Rights Reserved.
A Comparison of Generalized Cross-Correlation Methods
for Time Delay Estimation
--Ritu and Sanjeev Kumar Dhull
Time Delay Estimation (TDE) between the signals received at the spatial sensor pair has been a topic of significant importance because this estimated delay can be used as input in plenty of applications for further processing of the signal. The estimation of the delay should be accurate enough in order to avoid or minimize the propagation of the error to the subsequent stages. The generalized cross-correlation method is the most popular and widely used technique for TDE due to accuracy and low computational complexity. The paper presents a comparison of weighting functions used in generalized cross-correlation along with their simulation results. It has been shown how each weight affects the peak sharpening in the correlation function. Simulation has been carried out with different types of sound and noise. The effect of varying Signal-to-Noise Ratio (SNR) on the estimated delay has also been studied.
© 2016 IUP. All Rights Reserved.
Performance Testing of Composite Dielectric Patch Antenna
--B Premalatha, M V S Prasad and M B R Murthy
Microstrip antennae are low profile and less weight and are preferred for conformal low profile antennae requirements. A patch using two different dielectric materials in substrate is simulated for operation at 2.5 GHz and the performance is analyzed. The effect of placement of the two materials is investigated. The gain and bandwidth values are reported and discussed. The analysis is carried out with the help of HFSS (High Frequency Structural Simulator) software.
© 2016 IUP. All Rights Reserved.
Design and Analysis of High Gain Proximity Feed
Microstrip Patch Antenna for Wi-Fi Applications
--Y Pandu Rangaiah and R V S Satyanarayana
The modern communication systems need development in antennas which have large bandwidth and low profile. Profile is the physical size of the antenna and it should be as small as possible for easy installation and operation. The paper deals with design aspects of square microstrip patch antenna with proximity feed and its properties. In this paper, simulations are carried out on C-band square microstrip patch antenna that suits Wi-Fi and bluetooth applications. With the adjusted parameters, the designed antenna exhibits maximum gain of 7 dBi and return loss –40 dB at center frequency 5 GHz. Desired patch antenna design was simulated using ANSYS HFSS software. The substrate material used for designing of microstrip patch antenna is RT Duroid 5880 and the thickness of the substrate is 1.6 mm.
© 2016 IUP. All Rights Reserved.
A Survey of Various Reversible Binary to Gray Code Converters
--P Gowthami
Reversible logic has attained importance in the recent developments of high speed and low power digital systems. This factor calls for a performance analysis of different reversible binary to gray code converters. To know the different combinations of reversible gates used in the design for the construction of reversible binary to gray code converters, several binary to gray code converters are analyzed in this paper
© 2016 IUP. All Rights Reserved.
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