Search Results - "lookup table"

Sigmoid function implementation using the unequal segmentation of differential lookup table and second order nonlinear function by Syahrulanuar, Ngah, Rohani, Abu Bakar

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Simulation of adaptive gain control via 2-D lookup table for isolated hybrid micro-grid system by Mahdi, Mazin Mustafa, Thajeel, Ekhlas Mhawi, Abu Zaharin, Ahmad

“…This paper presented a smartness 2-D lookup table (2-DLT) control by means of adaptation gain to develop a frequency controller and facilitate the power-sharing requirements in an isolated micro-grid system. …”
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Field programmable gate array based sigmoid function implementation using differential lookup table and second order nonlinear function by Syahrulanuar, Ngah

“…Owing to its accuracy, the lookup table (LUT) has always been used to implement the sigmoid function in FPGA. …”
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Encrypting text data using elliptic curve cryptography by Ali, Abas Abdullahi

“…This technique boosts the system performance by wiping out the lookup table compared to the current mapping techniques that tend to share the lookup table between the recipient and the sender. …”
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A lightweight and secure algorithm of elliptic curve cryptography scalar multiplication using Q-NAF method in Lopez-Dahab coordinate by Abdulraheem, Waleed Khalid Amin

“…Finally, a new look-up table is proposed to optimize the formula {0, 1, 3}-NAF lookup table. The new lookup table reduces the size of the {0, 1, 3}-NAF lookup table from 15X6 into 4X5. …”
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Improving the performance of {0,1,3}-NAF recoding algorithm for elliptic curve scalar multiplication by Abdul Raheem, Waleed K., Md Yasin, Sharifah, Udzir, Nur Izura, Kamel Ariffin, Muhammad Rezal

“…Thus, we propose an improved {0, 1, 3}-NAF lookup table and mathematical formula algorithm which improves the performance of {0, 1, 3}-NAF algorithm. …”
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Two-Steps Implementation of Sigmoid Function for Artificial Neural Network in Field Programmable Gate Array by Syahrulanuar, Ngah, Rohani, Abu Bakar, Abdullah, Embong, Saifudin, Razali

“…To overcome this problem, the combination of second order nonlinear function (SONF) and the differential lookup table (dLUT) has been proposed in this paper. …”
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Wireless Local Area Network Based Indoor Positioning System by Keoh , Choo Kent

“…The data then will go through the predefined lookup table to locate the location of the user/object and the location will send to the MATLAB. …”
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Review of the Sigmoid Function Implementation into Digital Hardware by Syahrulanuar, Ngah, Rohani, Abu Bakar, Abdullah, Embong

“…Several methods has been proposed such as lookup table (LUT), piecewise linear approximation (PWL), piecewise nonlinear approximation and CORDIC. …”
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Local Position Estimation Using an Artificial Neural Network Based Model with a Hardware Implementation by Abdullah, Embong, Rohani, Abu Bakar, Syahrulanuar, Ngah

“…The proposed method used second order nonlinear function (SONF) as a foundation and further improves the result by using 320 bits of read only memory (ROM) for storing a differential lookup table (differential LUT). The method proves to be more effective considering the smallest deviation of sigmoid function achieved in comparison to conventional LUT and SONF. …”
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A faster version of Rijndael Cryptograpic algorithm using cyclic shift and bitwise operations by Mohd Ali, Fakariah Hani

“…In fact, too many tables are needed for various irreducible polynomials that this system is not flexible and expandable. The area for lookup tables becomes huge when multiple round units are implemented. …”
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A hermite interpolated LUT for RF power amplifiers by Selvadurai, Dinaagaren, Mohd Sidek, Roslina, Al-Hussaini, Khalid Taher Mohammed, Mohd Ali, Borhanuddin

“…Digital predistortion is one of the most widely used techniques to linearize a power amplifier (PA) to reduce the error vector magnitude (EVM) distortion and spectral regrowth. By far, the lookup table (LUT) predistorters are most frequently used scheme to mitigate the effects of non-linear power amplifier. …”
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A robust non-uniform indexation of a quadratically interpolated LUT predistorter for RF power amplifiers by Selvadurai, Dinaagaren, Mohd Sidek, Roslina, Varahram, Pooria, Mohd Ali, Borhanuddin

“…In digital predistortion, lookup table (LUT) predistorters are the most frequently used technique in order to compensate the non-linear effects of a power amplifier. …”
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A wide-speed high torque capability utilizing overmodulation strategy in DTC of induction machines with constant switching frequency controller by Jidin, Auzani, Nik Idris, Nik Rumzi, Mohamed Yatim, Abdul Halim, Sutikno, Tole, Elbuluk, Malik E.

“…This is achieved by modifying the flux error status produced from the flux hysteresis controller before it is fed to the lookup table. The main benefit of the proposed method is its simplicity since it requires only a minor modification to the conventional DTC hysteresis-based structure and does not require a space-vector modulator.…”
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Decoding of low-density parity-check codes in non-Gaussian channels by Chuah, T.C.

“…The nonlinear functions embedded in the filter bank can be stored as a lookup table or implemented efficiently using the CORDIC algorithm, which is very suitable for VLSI implementation. …”
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Torque ripple reduction in a.c. permanent magnet servo motor drives by Tang, Mi

“…For the purpose of accurately modelling the cogging torque and flux harmonics in PMSM, a lookup table embedded PMSM model is also proposed. It has been validated by both simulative and experimental tests that the proposed control scheme is able to reduce torque ripple in a PMSM drive system effectively for a wide range of frequencies, and even during transients, which has never been achieved according to the author's knowledge. …”
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Analog Structural Modeling Of Resonant Tunneling Diode Using Ltspice by Zaharimying, Wan Nurnabilah

“…One of the ways to implement the built-in model for an RTD is by using lookup table method in the voltage controlled current source. …”
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Simple dynamic overmodulation strategy for fast torque control in DTC of induction machines with constant-switching-frequency controller by Jidin, Auzani, Nik Idris, Nik Rumzi, Mohamed Yatim, Abdul Halim, Sutikno, Tole, Elbuluk, Malik E.

“…The selection of the optimized voltage vector can be simply implemented by modifying the flux error status before it is being fed to the lookup table. It will be shown that the proposed switching strategy facilitates the DTC to perform under six-step mode to achieve the fastest dynamic torque response. …”
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Optimum spacing for a quadratically interpolated look-up table predistorter for cellular power amplifiers by Selvadurai, Dinaagaren

“…Digital predistortion (DPD) is one of the most promising techniques to linearize a non-linear power amplifier (PA) in order to reduce the intermodulation distortion (IMD) and enhance the power efficiency. By far, lookup table (LUT) predistorters are the most commonly used approach to alleviate the effects of non-linear PA. …”
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On line fault detection for transmission line using power system stabilizer signals by Ali Falifla, Hamza AbuBeker

“…Once the fault is classified using the above classifier, its location is sent to the lookup table using the online neuro- fuzzy control strategy the optimum value of the gain and time constant for the PSS (Power System Stabilizer) are selected and used to compensate the damping at various fault conditions. …”
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