May 19

The IUP Journal of Telecommunications

Focus

Wireless Local Area Network (WLAN) faces challenges in meeting the online and multimedia-based service requirements of heavy data-intensive personal and portable computing devices. These networks require a highly reliable connection to support multi-standard services operating beyond a few hundreds of Mbps. Obviously, to enhance the customer base, these systems should operate at a lower operative cost, employing lesser complex equipment without any compromise with the data rate and network performance issues. Solutions to meet these objectives either using an infrared radiation or radio waves in the microwave or millimeter-wave bands do not seem to be a viable one. Therefore, research on high-speed WLAN has focused on infrared and optical wave carriers exploiting the unlimited and unregulated spectrum. In free space optics, information is transferred through optical beams in free space and does not require any frequency license. These systems can support up to a maximum 10 Gbps of data rate by full duplex connectivity with a very high degree of reliability and mean time between failures beyond 10 years.

Of the five papers in this issue, the first paper addresses the performance enhancement issues of a wireless network using OPNET and NS-2 simulators, and the second paper is a study on free space communication. The next three papers are related to digital signal processing and VLSI circuit optimization techniques used in the design of compact and faster digital signal conditioning subsystems.

The first paper, “Parameter Estimation and Comparison of Wireless Network Using Opnet Modeler and Network Simulator-2”, by Tarun Kumar and Poonam Singal, investigates and compares the performance parameters of a wireless network using Network Simulator-2 and OPNET Modeler Simulators to evaluate Ad-hoc On demand Distance Vector (AODV) routing protocol and file transfer protocols.

The free space optical communication is useful in establishing a reliable physical connection to provide high data rates at lower power consumption, lower installation cost and easier system up gradation. The second paper, “Free Space Optical Communication: A Study“, by Rashmi Singh and Akhilesh Kandariya, is a study report on FSO communication highlighting its performance measurements and system descriptions. External parameters or non-system-specific parameters related to the free space environment in terms of visibility, atmospheric attenuation, scintillation, deployment distance, window loss and pointing loss have been considered in the performance study of the FSO systems.

Signal processing, noise filtering and low power VLSI circuits also play a crucial role in boosting the usage of wireless communication network components, circuits and systems. The third paper, “Sparse FIR Filter Design Using Orthogonal Matching Pursuit“, by Priyanka Dalal and Ritu Boora proposes a digital filter design approach based on sparse impulse response to achieve an improvement in the efficiency. The paper utilizes compressive sensing recovery algorithms to design a Finite Impulse Response (FIR) digital filter with sparse impulse response.

The fourth paper, “An Optimized 6T XOR Circuit Using CNTFET Technology”, by Veski Dabas and Surender Kumar Grewal, proposes a range of XOR circuits based on Carbon Nano-Tube Field Effect Transistor (CNTFET) technology. The design has been simulated using HSPICE, to evaluate average power, power dissipation, PDP and delay, claiming an improvement in these parameters.

The last paper, “Optimization of SRAM Cell Using 32 nm FinFET Technology“, by Mamta and Surender Kumar Grewal, discusses different configurations of Static RAM cells and implementation of them using FINFET technology to improve power and speed. The paper further presents a comparative study focusing on various performance parameters like average power and delay. The simulation results claims an improvement in average power and delay by 94.7% and 33%, respectively, for 2-bit SRAM FinFET.

-V K Chaubey,
Consulting Editor

CheckOut
Article   Price (₹) Buy
Parameter Estimation and Comparison of Wireless Network Using Opnet Modeler and Network Simulator-2
50
Free Space Optical Communication: A Study
50
Sparse FIR Filter Design Using Orthogonal Matching Pursuit
50
An Optimized 6T XOR Circuit Using CNTFET Technology
50
Optimization of SRAM Cell Using 32 nm FinFET Technology
50
     
Contents : May 19

Parameter Estimation and Comparison of Wireless Network Using Opnet Modeler and Network Simulator-2
Tarun Kumar and Poonam Singal

The paper investigates and compares the performance parameters like load, delay, throughput, and data sent and received for a wireless network. The study has been conducted using two network simulators, Network Simulator-2 (NS-2) and Opnet Modeler (IT Guru Academic Edition), which are widely used in the field of network simulations . The network that has been selected is the wireless network consisting of 12 nodes each with Ad-hoc Ondemand Distance Vector (AODV) as routing protocol, the application used is FTP (File Transfer Protocols) and the bandwidth selected is 11 Mbps for all kind of communications.


© 2019 IUP. All Rights Reserved.

Article Price : ₹ 50

Free Space Optical Communication: A Study
Rashmi Singh and Akhilesh Kandariya

The paper explorers Free Space Optical (FSO) communication with its flashes and corns. FSO technology is useful where the physical connection is impractical due to high cost or other considerations, and in most cases, optical data transmission is done via optical fibers, because it allows transmission over relatively large distances without alignment issues and relatively very less disturbing influences of atmosphere. But optical data transmission using fiber has also many limitations. Some limitations are removed by FSO technology, such as it provides high data rates, low power consumption, low installation cost and easily upgradable. FSO performance parameters, i.e., internal and external parameters, and some modulation techniques used in FSO technology are also discussed.


© 2019 IUP. All Rights Reserved.

Article Price : ₹ 50

Sparse FIR Filter Design Using Orthogonal Matching Pursuit
Priyanka Dalal and Ritu Boora

Digital filters are used in a wide variety of signal processing applications. To improve the implementation efficiency of a digital filter, design of filters with sparse impulse response is a good solution and is currently a hot research area. Compressive sensing is an emerging signal processing technique for data acquisition, wherein a sparse signal is recovered from a highly incomplete set of measurements. The paper utilizes one of the well-known compressive sensing recovery algorithms, i.e., Orthogonal Matching Pursuit (OMP), to design a Finite Impulse Response (FIR) digital filter with sparse impulse response. Numerical example is taken to demonstrate the utility of the above-mentioned algorithm. The results demonstrate that at the cost of losing some optimality, one can design reasonably sparse FIR filters using OMP.


© 2019 IUP. All Rights Reserved.

Article Price : ₹ 50

An Optimized 6T XOR Circuit Using CNTFET Technology
Veski Dabas and Surender Kumar Grewal

In this paper, a new design of 6T XOR circuits based on Carbon Nanotube Field Effect Transistor (CNTFET) technology in 32 nm technology length is proposed for evaluation. They are simulated using HSPICE, and the performance parameters such as average power, power dissipation voltage source, PDP and delay are determined. The proposed circuit is compared with 12T CMOS XOR circuit which is conventionally used and compared with CNTFET counterpart of the XOR gate. The simulation results showed that the proposed 6T XOR gate is better in performance.


© 2019 IUP. All Rights Reserved.

Article Price : ₹ 50

Optimization of SRAM Cell Using 32 nm FinFET Technology
Mamta and Surender Kumar Grewal

CMOS technology is the most feasible semiconductor technology, but it fails to perform as per expectations beyond and at 22 nm technology node due to short channel effects. Multigate Field Effect Transistor (FET) like FinFET is the most viable substitute for MOSFETs at 22 nm and beyond. In this paper, different configurations of Static RAM (SRAM) cells (6T, 8T and 10T) are designed and implemented using FINFET technology to improve their power and speed. A 2-bit and a 4-bit SRAM are also implemented using the optimized circuit (10T) of SRAM cell. Also, a comparative study is made for various performance parameters like average power and delay. It can be concluded that the FinFET technology can effectively reduce power. Due to limited amount of power consumption, it can be used in a number of electronic devices.


© 2019 IUP. All Rights Reserved.

Article Price : ₹ 50

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