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Eddy-current sensors are the most commonly used position sensors in a magnetic bearing application. Most commercial eddy current sensor outputs analog voltage of 0–2 V or 0–5 V in their measurement range. Such eddy current sensors are quite expensive and are in the price range of $2500 (USD). This paper presents a design of a $20 (USD) low-cost eddy current sensor capable of resolving displacements...
Microstrip patch antenna finds a better choice in wireless communications because of their less cost, light weight and ease of fabrication. This paper proposes a novel design for the bandwidth enhancement of microstrip patch antenna with parasitic patch placed adjacent to the radiating patch along with the slots. The proposed structure is designed at 8.5 GHz using FR4-epoxy as substrate material that...
In this paper, analysis of a compact triple band microstrip antenna based on principle of etching slots in the radiating patch to produce desired resonance frequency is discussed. The proposed triband microstrip patch antenna achieved resonances at 3.6GHz, 5.6GHz and 7.9GHz. The miniaturization of the designed triband microstrip antenna is achieved with the introduction of slots in the radiating patch...
One of the important elements in an Active magnetic Bearing system is the electromagnetic coil. The shape and size of the magnetics depends upon the physical structure of the bearing system and its load bearing capacity. This paper presents an experimental design, fabrication and testing of magnetics used in an axial active magnetic bearing system. The designed magnetic coil is capable of supporting...
The cameras which use in day to day life are low resolution and high resolution cameras. In Practical video scrutiny applications, the faces developed by outside cameras are of low degree resolution and are disturbed by uncontrolled brilliance. Since low resolution cameras are preferred for surveillance because of its low cost. The existing GLF feature is not robust to track face at large changes...
In general human face has similar and different characteristics which play a very important role in recognizing facial expression. In this work, a new method presents to recognize different facial expressions from time sequential facial expression images. The performance of an automatic facial expression recognition system can be significantly improved by modeling the accuracy of various streams of...
A new approach blends a new camera architecture based on a digital micro-mirror device with the new mathematical theory and algorithms of compressive sampling. The “single-pixel” compressive digital camera functions by the method of focussing the desired image onto a digital micro-mirror device (DMD) consisting of an array of N tiny mirrors. Camera architecture employs a digital micromirror array...
Development of Personal Computers and Cloud Computing, Internet of Things is making duplicating the data very feasible. In this paper we are proposing visible watermarking using FPGA which provides one to one compound mapping that allows reversible watermarking. This method can be applied for different types of host images like binary, opaque monochrome and translucent full color ones. The ultimate...
Column scaling of LDPC codes is generally done to reduce the decoding complexity without degradation in bit error rate. It has been deduced that, the so constructed CS-LDPC codes had better performance than the existing regular and deterministic LDPC in terms of Bit Error Rate (BER). In this paper, ability of Column Scaled LDPC codes in reaching the best performance is evaluated for different fading...
The low-density parity-check (LDPC) codes are used to achieve excellent performance with low encoding and decoding complexity. One major criticism concerning LDPC codes has been their apparent high encoding complexity and memory inefficient nature due to large parity check matrix. More generally, we consider the encoding problem for codes specified by sparse parity-check matrices. We show how to exploit...
Purpose of this paper is to introduce a new technique for denoising underwater acoustic signal affected by ambient noise. Ambient noise is nonstationary and unwanted background noise caused due to manmade or natural causes. In practical application it is essential to denoise underwater acoustic signal, which is received by a hydrophone in order to get actual information. Having considered wind driven...
Security has become a primary concern in order to provide protected communication between mobile nodes in a hostile environment. Unlike the wireline networks, the unique characteristics of mobile ad hoc networks pose a number of nontrivial challenges to security design, such as open peer-to-peer network architecture, shared wireless medium, stringent resource constraints, and highly dynamic network...
A data discovery and dissemination protocol for wireless sensor networks (WSNs) is answerable for updating configuration parameters of, and distributing management instructions to, the sensor nodes. All existing data discovery and dissemination protocols undergo from two drawbacks. First, they are based on the centralized approach; only the base station can distribute data item. Such an approach is...
Cryptography plays an important role in the security of data. It enables us to store sensitive information or transmit it across insecure networks so that unauthorized persons cannot read it. The need for privacy has become a major priority and important for communication in all fields. Widespread use of personal communications devices has only increased demand for a level of security on previously...
Finite Impulse Response filters are the most important element in signal processing and communication. FIR filter architecture has multiplier, adder and delay unit. So FIR filter performance is mainly based on multiplier. In this paper presents FIR filter implantation of Booth multiplier using Modified Carry Save Adder (MCSA) and Carry Save Adder (CSA). These techniques are used to improve the performance...
This paper presents an architectural approach to the design of Low power and high speed Reconfigurable finite impulse response (FIR) filter. FIR digital filters are used in DSP by the virtue of its, linear phase, fewer finite precision error, stability and efficient implementation. In the proposed architecture, we are introduced pipeline Technique to obtain the high speed. So the proposed architectures...
Wireless Sensor Network consists of several sensor nodes which continuously monitor or sensing its environmental or physical condition and agreeably sends the sensing information to the Base Station or Sink. WSNs are application-specific, where the design requirements of WSNs change according to the application. Hence, routing protocol requirements are changed from one application to another. As WSN...
Cryptography plays an important role in the security of data. It enables us to store sensitive information or transmit it across insecure networks so that unauthorized persons cannot read it[1]. In this paper, we use FPGA chips to realize high data throughput AES pipelined architecture is proposed by partitioning the ten rounds into sub-blocks of repeated AES modules. In this paper we have detailed...
It is crucial to design energy-efficient advanced encryption standard (AES) cryptography for low power embedded systems powered by limited battery. We will present the hardware architecture to implement low power AES crypto module. Our low power AES crypto module has optimized architecture of data encryption unit and key schedule unit which could be applicable to wireless sensor networks. We also...
This paper presents a software-defined radio (SDR) system with reconfigurable architecture for wireless communications. The baseband software implementation by using a low-power fixed-point digital signal processor (DSP) is applied to demonstrate the concept of SDRs for different standards, and different operational modes. For simplicity, two operational modes, quadrature amplitude modulation (QAM)...
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