Chromatic dispersion is one of the most significant impairments in long-distance fiber-optical communications. Electrical domain compensation of optical chromatic dispersion by signal predistortion using digital processing is investigated with two different approaches: using a linear digital FIR compensating filter and using a nonlinear filter based on a look-up table (LUT). The linear compensa...

This paper presents an approach of logic mapping into LUT-Array-Based PLD where Boolean functions in the form of the sum of generalized complex terms (SGCTs) can be mapped directly. While previous mapping approach requires predetermined variable ordering, our approach performs mapping and variable reordering simultaneously. For the purpose, we propose a directed acyclic graph based on the multi...

The direct Fourier transform method is a straightforward solution with high accuracy for reconstructing magnetic resonance (MR) images from nonuniformly sampled k-space data, given that the optimal density compensation function is selected and the underlying magnetic field is sufficiently uniform. The computation however is very time-consuming, making it impractical especially for large-size im...

In Digital Signal Processing FIR Filter is used to remove the noise or unwanted components from a signal. This paper Presents an efficient VLSI Architecture of a Multi-Standard Digital Up Converter (DUC) based FIR filter that is used to remove the noise in the received channel data bits effectively. The proposed DUC based FIR filter consists of weight update block with Shift add architecture to...

This paper presents an optimized synchronous hybrid scaling scheme for the 8-bit moduli set {2 − 1,2,2 + 1}. Both Look-up-tables (LUTs) and modular adders are employed efficiently to generate the accurate scaled residues. Reverse conversion from residues to the original binary number is also computed in one residue channel without further hardware cost required. Xilinx device xc6slx4 − 3tqg144 ...

In this paper, a Time division multiplexing (TDM) based multichannel FIR filter architecture is proposed using a single multiplier and adder irrespective of number of channels and taps using the concept of resource sharing principle. For efficient optimization of the resources Output Product Coding (OPC) and Dual port schematic is used, which are based on Look-Up-Table (LUT). The proposed 16-ta...

The use of Look-Up Tables (LUTs) is extended from binary to multiple-valued logic (MVL) circuits. A multiple-valued LUT can be implemented using both current-mode and voltage-mode techniques, reducing the transistor count to half compared to that of a binary implementation. Two main applications for multiple-valued LUTs are multiple-valued FPGAs and intelligent memories. An FPGA uses a LUT as a...

This paper presents a new e cient method for nding an \optimal" bi-decomposition form of a logic function. A bi-decomposition form of a logic function is the form: f(X) = (g1(X ); g2(X )). We call a bi-decomposition form optimal when the total number of variables in X and X is the smallest among all bi-decomposition forms of f . This meaning of optimal is adequate especially for the synthesis o...

Polarimetric Synthetic Aperture Radar (Pol.-SAR) allows us to implement the recognition and classification of radar targets. This article investigates the arrangement of scatterers by SAR data and proposes a new Look-up Table of Region (LTR). This look-up table is based on the combination of (entropy H/Anisotropy A) and (Anisotropy A/scattering mechanism α), which has not been reported up now. ...

Land surface albedo (LSA), one of the Visible Infrared Imaging Radiometer Suite (VIIRS) environmental data records (EDRs), is a fundamental component for linking the land surface and the climate system by regulating shortwave energy exchange between the land and the atmosphere. Currently, the improved bright pixel sub-algorithm (BPSA) is a unique algorithm employed by VIIRS to routinely generat...