Patent application number | Description | Published |
20130083866 | DISTORTION COMPENSATOR AND DISTORTION COMPENSATION METHOD - A distortion compensator compensates for distortion of a signal caused by an amplifier. A storage section stores a plurality of compensation coefficients used for distortion compensation. A selection section selects a compensation coefficient corresponding to an index value indicative of a power level of the signal from among the plurality of compensation coefficients. The selection section determines whether or not the power level is higher than a threshold, and uses, based on a determination result, a first index value calculated without using a logarithmic operation or a second index value calculated by using a logarithmic operation. | 04-04-2013 |
20130084810 | RECEIVING APPARATUS, BASE STATION APPARATUS AND METHOD FOR REDUCING INTERFERENCE WAVE - A receiving apparatus includes: an interference wave reducer configured to reduce an interference wave included in a received signal; and an automatic gain controller configured to automatically control a gain for the received signal, the automatic gain controller including a convergence time saver to save convergence time of an automatic gain control for the received signal based on an input of an interference wave. | 04-04-2013 |
20130259154 | WIRELESS APPARATUS AND DISTORTION COMPENSATING METHOD - A wireless apparatus includes amplifying systems each including a storing unit storing a distortion compensation coefficient for compensation for a nonlinear distortion of one or more transmission signals, a compensator compensating for the nonlinear distortion using the distortion compensation coefficient stored in the storing unit, and an amplifier amplifying the transmission signal after distortion compensation. The wireless apparatus further includes a switch that selects feedback signals corresponding to the transmission signals output from the amplifying systems, a subtractor that derives one or more differences between the feedback signal selected in the switch and the transmission signal, a first calculator that derives a distortion compensation coefficient that restricts the difference derived in the subtractor, and a switch controller that controls a length of time during which the feedback signal is selected in the switch depending on magnitude of distortion of the transmission signal output from the amplifying system. | 10-03-2013 |
20130321078 | DISTORTION COMPENSATION APPARATUS AND DISTORTION COMPENSATION METHOD - A distortion compensation apparatus including: a processor configured to generate a pre-distortion signal by compensating an input signal for a distortion based on a distortion compensation coefficient and a plurality of delayed signals obtained by delaying the input signal by a plurality of amounts of delay, and an amplifier configured to generate an amplified signal by amplifying the pre-distortion signal, wherein the processor calculates the distortion compensation coefficient based on the input signal, the pre-distortion signal, and the amplified signal, and calculates the plurality of amounts of delay based on the amplified signal. | 12-05-2013 |
20140003554 | DISTORTION COMPENSATING DEVICE AND DISTORTION COMPENSATING METHOD | 01-02-2014 |
20140106692 | TRANSMISSION APPARATUS, OUTPUT CONTROL METHOD FOR TRANSMISSION APPARATUS AND TRANSMISSION SYSTEM - A transmission apparatus includes: an amplifier configured to amplify a transmission signal; a calculation unit configured to calculate a standing-wave ratio based on the transmission signal and a signal from an antenna to the amplifier; and a controller configured to switch a state of the amplifier based on the state of the amplifier and the standing-wave ratio. | 04-17-2014 |
20140145788 | DISTORTION COMPENSATION DEVICE AND DISTORTION COMPENSATION METHOD - A distortion compensation device includes a storage unit, an address generator, and a distortion compensation processor. The storage unit stores therein a distortion compensation coefficient for compensating distortion generated in an amplifier for amplifying an input signal. The address generator generates a first address based on a power value of the signal at a current time. Furthermore, the address generator delays, every time a new augend is input, the sum of the power value of the signal at the current time and the augend. The address generator generates a second address based on the sum obtained by calculating a new augend, from the delayed sum. The distortion compensation processor acquires a distortion compensation coefficient corresponding to a combination of the first address and the second address from the storage unit and performs distortion compensation processing on the signal by using the acquired distortion compensation coefficient. | 05-29-2014 |
20140146910 | DELAY QUANTITY ESTIMATION APPARATUS AND DELAY QUANTITY ESTIMATION METHOD - A delay quantity estimation apparatus comprises a first correlation value arithmetic unit to calculate a first correlation value as a correlation value between a first input signal and a feedback signal delayed with a first delay value; a second correlation value arithmetic unit to calculate a second correlation value as a correlation value between the first input signal and a feedback signal delayed with a second delay value; and a delay quantity estimation unit to estimate a delay quantity of the feedback signal with respect to the input signal on the basis of the first difference value as a difference between the first correlation value and the second correlation value, wherein the second delay value is a value given by adding a certain value to the first delay value. | 05-29-2014 |
20150077180 | DISTORTION COMPENSATION APPARATUS AND DISTORTION COMPENSATION METHOD - A distortion compensation apparatus includes: a storage unit that stores a distortion compensation coefficient; a distortion-compensation-coefficient selecting unit that takes a logarithm of power of an input signal and exponentiates a value obtained by taking the logarithm, and that selects a distortion compensation coefficient that is stored in the storage unit according to a value obtained by the exponentiating; a distortion-compensation processing unit that acquires the selected distortion compensation coefficient from the storage unit, and that performs distortion compensation processing on the input signal to the distortion-compensation-coefficient selecting unit using the acquired distortion compensation coefficient; an amplifier that amplifies the signal subjected to the distortion compensation processing; and a distortion-compensation-coefficient updating unit that updates the distortion compensation coefficient stored in the storage unit based on the amplified signal and the input signal to the distortion-compensation-coefficient selecting unit. | 03-19-2015 |
Patent application number | Description | Published |
20090277248 | METHOD TO DETERMINE GAS LEAKAGE FROM UNDERGROUND PIPELINES - Method to determine the point of the gas leak from the buried pipeline located in the ditch under the soil, providing positioning at least one fiber-distributed temperature transmitter in the soil over the pipeline; the fiber-distributed temperature transmitter's readings allow to determine the leak point presence and location; the method is characterized by the fact that the fiber-distributed temperature transmitter is located above the pipeline surface; in the ground, between the pipeline and the transmitter or over the transmitter a shield is mounted which deflects the gas flow (in case of leakage) in the upper central part of the ditch adjacent to the transmitter and preventing the gas flow to the ditch peripheral areas located far away from the transmitter; the temperature is measured continuously and by the temperature drop the gas leak and its location is determined. | 11-12-2009 |
20100080260 | METHOD OF DETERMINING THERMOPHYSICAL PROPERTIES OF SOLID BODIES - The invention is related to the methods of solid bodies' thermophysical properties determination, particularly, to the methods of heat conduction and volumetric heat capacity determination. In accordance with the method heating of the reference sample and surface and sequentially located samples of the solid bodies in question is performed using a thermal energy source moving at a constant speed relative to the reference sample and samples-in-question. Excessive temperatures of the reference sample and samples-in-question at the points on the heating line are measured and by the excessive temperatures values the thermophysical properties are determined. Arbitrary shape samples are used and the samples' heat conduction and volumetric heat capacity are determined by solving the inverse-factor heat conduction problem. | 04-01-2010 |
20120103600 | METHOD OF DETERMINATION OF FLUID INFLUX PROFILE AND NEAR-WELLBORE SPACE PARAMETERS - Method for determination of a fluid influx profile and near-wellbore area parameters comprises measuring a first bottomhole pressure and operating a well at a constant production rate. After changing the production rate a second bottomhole pressure is measured together with a fluid influx temperature for each productive layer. Relative production rates and skin factors of the productive layers are calculated from measured fluid influx temperatures and measured first and second bottomhole pressures. | 05-03-2012 |
20140174729 | METHOD FOR DETERMINING PARAMETERS OF A BOTTOMHOLE AND A NEAR-BOTTOMHOLE ZONE OF A WELLBORE - Whiles moving a pipe string in a wellbore during tripping operations, pressure and temperature are measured. Based on the measured pressure and temperature, such parameters of a bottomhole and a near-bottomhole zone of the wellbore are calculated as skin factor, permeability, reservoir thickness, bottomhole pressure, and outflow or inflow from/to the zone under consideration. | 06-26-2014 |
20140192953 | METHOD FOR DETERMINATION OF SPATIAL DISTRIBUTION AND CONCENTRATION OF CONTRAST COMPONENTS IN A POROUS AND/OR HETEROGENEOUS SAMPLE - A method for determination of a spatial distribution and concentration of contrast components in a porous sample comprises the steps of scanning a sample with X-ray and obtaining a computer tomographic image of the sample. Then an area of interest inside the obtained computer tomographic image is selected and a first cross-section of the computer tomographic image is defined. Spatial distribution and concentration of contrast components inside the area of interest are determined by analyzing histograms of grayness distribution in the cross-sections of the computer tomographic image starting with the reference cross-section. | 07-10-2014 |
20140288836 | METHOD FOR DETERMINING THE INFLOW PROFILE OF FLUIDS OF MULTILAYER DEPOSITS - A method for determining the profile of fluids inflowing into multi-zone reservoirs provides for a temperature measurement in a wellbore during the return of the wellbore to thermal equilibrium after drilling and determining a temperature of the fluids inflowing into the wellbore from each pay zone after perforation at an initial stage of production. Specific flow rate for each pay zone is determined by a rate of change of the measured temperatures. | 09-25-2014 |
20150053398 | METHOD FOR DETERMINING AN INFLOW PROFILE OF MULTILAYER RESERVOIR FLUIDS IN A WELLBORE - Methods for determining an inflow profile of multilayer reservoir fluids in a wellbore are described herein. A bottom-hole zone is cooled before well perforation. Then, the wellbore is perforated, and a flow temperature is measured in the wellbore above each perforation zone. A production rate of each productive layer is determined taking into account thicknesses of the perforation zones and using results of temperature measurements acquired in a period between an end of an initial production stage characterized by strong impact of a volume of the wellbore and quick flow temperature changes in the wellbore, and a time when the bottom-hole zone cooling effect on the temperature measurements becomes insignificant. | 02-26-2015 |
Patent application number | Description | Published |
20120073802 | COMPLEX TOOL FOR WELL MONITORING - A complex tool according to the invention comprises a cylindrical housing, a lever centralizer aligning the tool along the well axis and having at least six levers and a fluid flow temperature sensor and inflow temperature indicator located on the tool axis. A fluid phase composition sensors are located on the centralizer levers and distributed along the well bore circumference. An additional fluid phase composition sensor is located on the tool axis. At least one additional fluid flow temperature sensor and at least one additional inflow temperature indicator disposed on each lever and distributed along the well bore circumference and located on the same line with the phase composition sensors parallel to the tool axis. There is an additional upper lever centralizer in the tail part. | 03-29-2012 |
20120103601 | METHOD OF DETERMINATION OF FLUID INFLUX PROFILE AND NEAR-WELLBORE SPACE PARAMETERS - Method for determination of a fluid influx profile and near-wellbore area parameters comprises measuring a first bottomhole pressure and after operating a well at a constant production rate changing the production rate and measuring a second bottomhole pressure. A wellbore fluid temperature over an upper boundary of a lowest productive layer and wellbore fluid temperatures above and below other productive layers are measured and relative production rates and skin factors of the productive layers are calculated from measured wellbore fluid temperatures and measured first and second bottomhole pressures. | 05-03-2012 |
20140060172 | METHOD FOR MEASURING WEIGHT CONCENTRATION OF CLAY IN A SAMPLE OF A POROUS MEDIUM - For the purpose of determining a weight concentration of a clay material in a porous medium sample, a specific active surface area of the clay material and an initial specific active surface area of the porous sample are measured. A water solution of the clay material is pumped through the sample and a specific active surface area of the sample of the porous medium is measured after the pumping. Then, the weight concentration | 03-06-2014 |
20140064452 | METHOD FOR MEASUREMENT OF WEIGHT CONCENTRATION OF CLAY IN A SAMPLE OF A POROUS MATERIAL - A solution of a clay material is pumped through a sample of a porous material. After completion of pumping, at least a part of the sample is crushed into powder and a clay fraction is elutriated from the prepared powder. X-ray diffraction analysis of the elutriated clay fraction is performed and weight concentration of clay material in the sample of the porous material is determined. | 03-06-2014 |
20140065713 | METHOD FOR MEASUREMENT OF WEIGHT CONCENTRATION OF CLAY IN A SAMPLE OF A POROUS MATERIAL - Determining weight concentration of clay in a sample of a porous material, a water-soluble salt of a metal is selected that enters in a selective ion exchange reaction with clay, with the general formula R | 03-06-2014 |