Recent Patents on Signal Processing (Discontinued) - Volume 5, Issue 1, 2015

This paper reviews the digital signal processing (DSP) methods used in coherent fiber optic communication systems. With the advances in high speed DSP, linear impairments such as chromatic dispersion (CD) and polarization mode dispersion (PMD) can be compensated for using fixed/adaptive equalizers. It is also possible to compensate for the interplay between dispersion and nonlinearity by digital back propaga Read More

When liquid steel is tapped from a basic oxygen furnace (BOF), it is essential to minimize the quantity of slag carry-over, because the high level slag may result in the oxidation and the phosphorus reversion during the secondary metallurgy process. The system with the infrared thermal camera is widely used to detect the slag. However, two problems still exist. The first problem is the tracking of tapping stream. The second proble Read More

An image processing patent technique for the improvement of entropic compression with digital images has been presented. “Twodimension wavelet transform” (2D-DWT), “two-dimension discrete cosine transform” (2D-DCT) and multi-resolution perfect reconstruction structures, with quincunx filter and grid are used for image processing and simulations using MATLAB, up to 2-level of analysis and synthesis. The possibi Read More

The “Internet-of-Things" (IoT) paradigm has been extensively focused in the last years, since it covers a wide scope of applications, that range from spam detection in e-mail datasets to on-body sensors. However, this data flooding, also known as “big data" phenomenon, has required high levels of security, since private and important data are now surfing over our heads. In this paper, we introduced a recently developed pattern Read More

The monitoring of the power level during nuclear reactors operation is done by instruments, which measure the neutron flux. The calibration of this power is carried out by thermal means. Its accurate knowledge is critical to the fuel burnup calculations, and mainly to electrical power. Nuclear fuel burning is proportional to the thermal power released by the reactor and is extremely relevant for the calculation of uranium-235 m Read More

The output of an N-point FFT (Fast Fourier Transform) is zero at odd positions if its inputs at odd positions with N/2 distance are equal and this property is exploited in order to reduce the power consumed by the FFT circuitry when operating on sparse data. An OFDM (Orthogonal Frequency Division Multiplexing) transceiver with such a configurable FFT is described, where undersampling is applied in order to reduce the ADC ( Read More