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In wireless communication, equalization is an effective technology to change channel characteristics and reduce the Inter-Symbol Interference (ISI). Based on analyzing the LMS algorithm, the application of this algorithm in channel equalizer is studied. A Channel Equalizer based on LMS algorithm is implemented using Xilinx System Generator for DSP develop software. This implementation method is a...
In this work the image is segmented effectively based on texture feature by reducing the noise. For effective image segmentation Expectation-Maximization (EM) algorithm based on Gabor filter is used. The EM algorithm is applied on 2D Ultrasonic image of uterus and tested. The Gabor function has been recognized by its multiresolution properties and the precision of locating the texture features in...
The principle of an automatic VHDL code generator dedicated to the control of the electric systems is presented in this paper. From the definition of classic regulator, it is possible to envisage a direct integration of the digital regulator in a FPGA component. The advantage of using a FPGA rather than a micro-controller lies in the fact of reaching very high sampling frequencies, allowing to obtain...
The history of speech recognition refers to some decades ago. Speech recognition performs by using a number of complicated algorithms. Real-time and rapid execution of these algorithms is very important. In this paper, a linear systolic architecture is proposed which can execute speech recognition algorithms based on Hidden Markov Model (HMM) in parallel and pipeline forms. The proposed architecture...
Design and field programmable gate array (FPGA) implementation of a high-speed Viterbi decoder with a constraint length of 7 and a code rate of 1/2 is presented here. Based on an algorithmic state machine (ASM) flowchart of Viterbi algorithm and by taking advantages of lookup tables and parallelism, this hard-decision decoder has a throughput of 510 Mbps. Its RTL code and self-checking test bench...
This paper examines a practical method to reduce the spectral distortion at the output of an envelope elimination and restoration (EER) power amplifier (PA). The EER amplifiers utilized in terrestrial amplitude modulation (AM) radio broadcast transmitters are affected by non-linear and memory effects; the proposed compensation method exploits the source of these effects in real-world amplifiers. Specifically,...
The limitation of speed of modern computers in performing the arithmetic operations such as addition, subtraction and multiplication suffer from carry propagation delay. Carry free arithmetic operations can be achieved using a higher radix number system such as Quaternary Signed Digit (QSD). We proposed fast adders based on Quaternary signed digit number system. In QSD, each digit can be represented...
Itpsilas well known that parametric fuzzy conjunction and disjunction operations have not effective hardware implementation because they use product and computing powers of operations in their definitions. New approach of generation of non-associative conjunctions fuzzy operations has been developed. Based on this new method parametric classes of fuzzy operations, suitable for effective hardware implementation,...
Due to aggressive technology scaling VLSI circuits have become more susceptible to transient errors. The associated reduction in supply voltages has decreased noise margins, causing system reliability to be reduced increasingly at a time when electronic systems are being used in ldquosafety criticalrdquo applications. Clock distribution issues as well as the demands for low power circuits have exposed...
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