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A novel method for designing a pipelined parallel architectures for the computation of FFT (Fast Fourier Transform) with the procedure of folding transformation and register minimization techniques is presented. The functionality of designed architecture is verified by simulation in hardware description language VHDL. Further architectures namely R22SDF(Radix22 Single path delay feedback), R4SDC (Radix4...
Conference proceedings front matter may contain various advertisements, welcome messages, committee or program information, and other miscellaneous conference information. This may in some cases also include the cover art, table of contents, copyright statements, title-page or half title-pages, blank pages, venue maps or other general information relating to the conference that was part of the original...
Space Time Block Codes (STBC) have shown remarkable performance for Multiple Inputs Multiple Output (MIMO) systems. The performance of STBC can be further enhance by knowing transmit channel side information. This paper investigates how to exploit the channel side information at the transmitter end for STBC-MIMO system using pre-coding methods. The mathematical model for designing the codebook for...
A Wireless Sensor Networks (WSN) consists of spatially distributed sensor to monitor physical conditions and pass their data through network to the sink node. Topology control is an important technique used in WSN to achieve energy conservation and extend network lifetime without affecting important network performance such as connectivity and throughput. Topology control can be implemented in following...
In this paper, an improved version of Gravitational Search Algorithm (GSA) called GSA with Wavelet Mutation (GSAWM) is applied for the design of 8th order infinite impulse response (IIR) band pass digital filter. Incorporation of mutation strategy into the conventional GSA technique not only enhances its searching capability but also the chance of convergence to near global solution is increased many...
This paper presents an optimal design of linear phase digital finite impulse response (FIR) low pass (LP) filter using Adaptive Particle Swarm Optimization (APSO). APSO is an improved version of conventional PSO in which estimation of evolution state determines one of the four phases such as exploration, exploitation, convergence and jump-out for the entire optimization process. These modifications...
This research work targets to address the needs of new generation wireless technology for Wireless Local Area Networks (WLAN) and Wireless Personal Area Networks (WPAN) including high-performance personal computers (pes) and multimedia equipment, utilizing short-range Gigabit Radios at 60 GHz. The issues involved in planning & deployment of wireless communications system functional at 60 GHz were...
PAPR reduction of OFDM signal has been a subject of intense research in the past decade. Many methods have been proposed to reduce the high PAPR problem. Partial transmit sequence (PTS) is one of the most popular peak-to-average power ratio (PAPR) reduction technique proposed for orthogonal frequency-division multiplexing (OFDM) systems. The Conventional PTS (C-PTS) is suffers from higher computational...
Indoor optical wireless communication systems provide an attractive alternative for realizing next generation wireless local area network. Free space optical (FSO) communication suffers from several challenges in practical deployment. To overcome such limitation various modulation schemes are used. Generally modulation technique like on-off keying is used in visible light communication system to build...
In this paper, we present a method of using Particle Swarm Optimization (PSO) to optimize the element spacings and lengths of mutually coupled Linear Array Antenna (LAA) to have maximum Directivity (D) and minimum Half Power Beam Width (HPBW). Two different design structures of LAA are considered comprising of six and fifteen element dipoles. Simulation and result verification of the design array...
Compact high gain UWB antenna with multiple resonance characteristics are reported in this paper. The high gain is achieved by introducing U shaped slot and 7 shaped stubs. The directors are pasted on top of the patch in U shaped slot of center position. The FR4 substrate thickness and permittivity helps to the achieving high gain. The performance of the proposed antenna simulated and measured. The...
This paper presents a Koch-like sided Sierpinski multi-fractal antenna operating in ultra wide band range for wireless applications. The novel idea of multi-fractal geometry is introduced into the conventional triangular patch antenna with microstrip feed. The addition of Koch and Sierpinski fractal techniques gives rise to better impedance bandwidth and return loss characteristics. The proposed antenna...
This paper presents the design of reconfigurable antenna for LTE (band1, band23, band40) and WLAN applications. The proposed antenna consists of rectangular patch fed by a proximity feed. The presence of square slots on the diagonal corners is used for frequency reconfiguration. The antenna can operate at 2.07GHz, 2.1GHz 2.4GHz and 2.45GHz by proper selection of diagonal slots. The directivity is...
Wireless Sensor Network is made up of tiny nodes with ability to sense, communicate and compute due to the presence of battery, sensors, transceivers, memory, and processor in them. This paper deals with a single target tracking scenario performed with static as well as mobility optimized mobile sensor nodes in an energy conserving manner, hence the name hybrid sensor network. Using the static nodes...
A low-noise amplifier (LNA) with high gain is presented. The LNA is the outer most part of a transceiver and it is responsible for providing enough gain to the signal with the least distortion possible. This system uses current-reuse technique to achieve high gain with minimal noise. The CMOS 0.18μm technology has been chosen for the design of the LNA at the transistor level. Agilent's ADS tool has...
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