Patent application number | Description | Published |
20090003372 | INGRESS NOISE REDUCTION IN A DIGITAL RECEIVER - The invention provides a device for reducing ingress noise in a digital signal, comprising a noise predictor for predicting an amount of ingress noise in the digital signal based on past samples of the ingress noise, and a subtractor for subtracting the predicted amount of ingress noise from the digital signal. Channel distortion is compensated for by a noise-independent equalizer, such as a ZF equalizer, placed upstream of the noise predictor. The device may be incorporated, for example, in a cable modem termination system (CMTS) of an hybrid fiber/coax (HFC) network. | 01-01-2009 |
20090268853 | MULTIPLE INPUT, MULTIPLE OUTPUT CHANNEL, DIGITAL RECEIVER TUNER - The present invention teaches a compact and highly integrated multiple-channel digital tuner and receiver architecture, suitable for widespread field deployment, wherein each receiver demodulator channel may be remotely, automatically, dynamically, and economically configured for a particular cable, carrier frequency, and signaling baud-rate, from an option universe that includes a plurality of input cables, a plurality of carrier frequencies, and a plurality of available baud-rates. A multiple coax input, multiple channel output, digital tuner is partitioned into a multiple coax input digitizer portion and a multiple channel output front-end portion. The digitizer portion consists of N digitizers and accepts input signals from N coax cables and digitizes them with respective A/D converters. The front-end portion consists of M front-ends and provides M channel outputs suitable for subsequent processing by M respective digital demodulators. In a first clock domain, a fixed predetermined A/D sampling rate is chosen to provide oversampling of the inputs by a common integer multiple of all the symbol rates of interest. A plurality other clock domains operate at selectable sub-multiples of the first domain as required to deliver a constant number of symbol samples at the output of each front-end. At the input to each of the M front-ends is a respective input selector coupled to each of the N streams of digitized input data followed by a digital signal scaler that dynamically scales the selected incoming stream of digitized input data as a function of the signal power of the channel's associated carrier. | 10-29-2009 |
20090316824 | METHOD FOR TRANSMITTING A SEQUENCE OF SYMBOLS FOR EXPLOITING TRANSMIT DIVERSITY - An embodiment of a method for transmitting data through at least a channel in a wireless communication system, the method comprising at least the steps of:
| 12-24-2009 |
20110013734 | INGRESS NOISE REDUCTION IN A DIGITAL RECEIVER - The invention provides a device (D | 01-20-2011 |
20120076087 | Tile Allocation Method - A method and apparatus are provided for allocating and transmitting groups of subcarriers, called tiles, between a plurality of transceiver antennas. The method includes receiving at least one downlink signal by a subscriber station transceiver through at least one of the plurality of subscriber station antennas, characterizing a received signal of at least one downlink signal over multiple subcarriers, and allocating tiles for uplink transmission through at least one of the plurality of transceiver antennas. The tiles allocation is based on the characterized received signal of the at least one downlink signal over multiple subcarriers and is based on a required power Ptx for uplink transmission compared with a maximum power P that each of the plurality of the transceiver antennas can emit. | 03-29-2012 |
20120134322 | CELL SEARCH METHOD FOR A DOWNLINK CHANNEL OF AN OFDMA TRANSMISSION SYSTEM - A cell search method in a multiple carrier wireless network includes a step of trying to select, among a list of candidate couples [carrier frequency; bandwidth], at least one candidate associated with at least one cell of the multiple carrier wireless network. The cell search method includes: a step of obtaining and ordering an initial list of possible candidate couples [carrier frequency; bandwidth] according to the multiple carrier wireless network; a step of reducing the initial list, delivering a reduced list, the reduced list including only candidates compatible with a predetermined communication mode of the multiple carrier wireless network, through a differential cross correlation of the candidate couples [carrier frequency; bandwidth] of the initial list; a cell search step in which a cross-correlation is performed by testing all time/frequency hypothesis for at least one candidate of the reduced list of candidates, delivering synchronisation information. | 05-31-2012 |
20120140683 | METHOD OF EXPLOITATION OF CO-CHANNEL INTERFERENCE, APPARATUS AND COMPUTER PROGRAM - A method of canceling co-channel interference of a signal received by a mobile station having at least two receiving antennas, in a cellular OFDMA-TDD communication network having a serving base station and at least one interfering base station. The signal is a result of a serving signal transmitted by the serving base station which is distorted by at least one interfering signal transmitted by the interfering base station. The serving signal is transmitted with a first modulation scheme and the interfering signal is transmitted with a second modulation scheme. The method includes: a channel estimation phase delivering channel estimations of the serving signal and the interfering signal; and a MIMO detecting phase, detecting symbols by using the channel estimations of the serving signal and the interfering signal. The MIMO detection phase is realized using a non-linear method which uses the first modulation scheme and the second modulation scheme. | 06-07-2012 |
Patent application number | Description | Published |
20100065533 | Adaptive Resistance Weld Control - A resistance weld control employing a model-based run-to-run estimate of load impedance, giving the weld control system the ability to maintain and predict the expected impedance of a successfully completed resistance spot weld, and to detect when the load impedance observed by the resistance weld control is within a target neighborhood of that impedance predicted by the model-based run-to-run estimate of load impedance. A target weld current and a range of weld times may be specified, such that the actual weld time employed in making the resistance spot weld is responsive to the time required to complete the contact preparation phase. Further, a fixed weld time and a range of target weld currents may be specified to make a resistance spot weld, such that the actual target weld current employed is responsive to the time required to complete the contact preparation phase of the weld. | 03-18-2010 |
20110144807 | POWER MONITOR FOR VAPOR COMPRESSION EQUIPMENT DIAGNOSTICS - A method of automatically detecting an anomalous condition relative to a nominal operating condition in a vapor compression system. An expected input power function in the form of a hyperplane is calculated based on three temperature readings: an intake temperature from an intake area of the condenser unit, a return temperature from an intake area of an evaporator unit, and a supply temperature from a supply output area of the evaporator unit. The function produces an estimate of the expected input power consumed by the compressor unit, and this expected input power is compared with an actual input power measured from the compressor unit. If the expected input power deviates from the measured input power by more than a predetermined tolerance, an indication is stored and communicated that an anomalous condition, such as a refrigerant loss, condenser unit fouling, or a malfunctioning fan, exists in the vapor compression system. | 06-16-2011 |
Patent application number | Description | Published |
20140144537 | WIRED PIPE COUPLER CONNECTOR - A method of forming a wired pipe transmission line includes: providing an assembly that includes an inner conductor surrounded by an insulating material; attaching a fixation element to the assembly at or near an end thereof; providing a tubular outer conductor; disposing the assembly and the fixation element within the outer conductor; and fixedly attaching the fixation element to the inner portion of the tubular outer conductor. | 05-29-2014 |
20140144614 | WIRED PIPE COUPLER CONNECTOR - A wired pipe coupler that carries at least a data signal includes a carrier having a plurality of electrical components disposed therein and one or more antennas supported by and spaced from the carrier, the one or more antennas being electrically coupled to the carrier through respective ones of the plurality of electrical components. | 05-29-2014 |
20140352941 | TRANSMISSION LINE FOR WIRED PIPE - A wired pipe system includes a wired pipe segment having a first end and a second end, a first coupler in the first end and a second coupler in the second end and a transmission line disposed in the wired pipe segment between the first and second ends. The transmission line includes a transmission cable that includes an inner conductor and an insulating material disposed about the inner conductor as well as a a wire channel surrounding the insulating material and the inner conductor for at least a portion of a length of the transmission cable. The wire channel and the insulating material are mated together by at least one mating feature. | 12-04-2014 |
20140374167 | ELECTRONICS FRAME WITH SHAPE MEMORY SEAL ELEMENTS - An electronics frame for a wired pipe drill string, including a housing arranged to be disposed within the wired pipe drill string. The housing includes a chamber formed therein and one or more electronic components disposed in the chamber. A shape memory element is disposed in the chamber. The shape memory element is transitionable in response to a transition stimulus between a first shape permitting positioning within the chamber and a second shape sealingly engagable with the housing to isolate the one or more electronic components from fluid. A method of isolating an electronic component is also included. | 12-25-2014 |
20150060041 | ELECTRONIC FRAME FOR USE WITH COUPLED CONDUIT SEGMENTS - An electronic frame for use in a downhole component coupling mechanism in a segmented wired pipe system includes a first frame element including at least one retaining structure configured to retain an electronic component. The frame also includes a sealed chamber disposed in the frame element, the sealed chamber including inputs to receive input signals from communication elements and either couple the inputs together or direct the input signals to control electronics. | 03-05-2015 |
20150194239 | TRANSMISSION LINE FOR WIRED PIPE - A wired pipe transmission line for disposal in a wired pipe segment. The line includes an assembly including an inner conductor and an insulating material surrounding the inner conductor and a protective layer that is formed of a continuous portion of a starting material spirally around the assembly. | 07-09-2015 |
20150204143 | WIRED PIPE EROSION REDUCTION - A wired pipe segment includes an inner bore extending through the wired pipe segment and a transmission line channel forming a channel from outside the wired pipe segment to the inner bore and including an inlet into the inner bore. The inner bore includes a pocket formed in the inner bore proximate the inlet and an insert is disposed in the pocket that substantially fills the pocket. | 07-23-2015 |
20150226053 | REACTIVE MULTILAYER FOIL USAGE IN WIRED PIPE SYSTEMS - A sealed chamber for disposal in a wired pipe segment includes a base element, electronics supported in a chamber in the base element and a sealing layer that prevents the electronics inside the chamber from harmful gases and fluids, the sealing layer comprising a reactive multi-layer foil material (RMFM). | 08-13-2015 |
20150248950 | TRANSMISSION LINE FOR WIRED PIPE, AND METHOD - A wired pipe transmission line for disposal in a wired pipe segment for use in subterranean drilling. The transmission line includes an assembly including an inner conductor and a dielectric layer including silicon dioxide (SiO | 09-03-2015 |
20150337641 | DOWNHOLE TOOL INCLUDING A MULTI-CHIP MODULE HOUSING - A downhole tool includes a tool body having an in inner surface portion and an outer surface portion. The outer surface portion includes a recess having a peripheral wall and an inner surface. A multi-chip module (MCM) housing is defined in the recess. The MCM housing includes one or more fortifying members that support axial and radial loading of the downhole tool and include one or more electronics receiving zones. | 11-26-2015 |
20150337644 | REMOVEABLE ELECTRONIC COMPONENT ACCESS MEMBER FOR A DOWNHOLE SYSTEM - A downhole tool includes a tool body having an outer surface portion and an inner surface portion and a recess formed in one of the outer surface portion and inner surface portion. At least one removable electronic component access member is detachably mounted to the tool body. The removable electronic component access member provides access to electronic components housed in the recess. A metallic seal is provided on at least one of the tool body and the removable electronic component access member. The metallic seal prevents fluid ingress into the recess through the at least one removable electronic component access member. | 11-26-2015 |
20160076364 | TRANSMISSION LINE FOR DRILL PIPES AND DOWNHOLE TOOLS - A method of forming a wired pipe transmission line includes: providing an assembly that includes an inner conductor surrounded by an insulating material; attaching a fixation element to the assembly at or near an end thereof; providing a tubular outer conductor; disposing the assembly and the fixation element within the outer conductor; and fixedly attaching the fixation element to the inner portion of the tubular outer conductor. | 03-17-2016 |
Patent application number | Description | Published |
20140166309 | PRESSURE COMPENSATION DEVICE FOR THREAD CONNECTIONS - A threaded tubular section includes a first tubular member made of a first material, the first tubular member including a threaded pin section. The section also includes a second tubular member made of a second material, the second tubular member including a threaded box section to mate with the threaded pin section. A pressure equalization device made of a third material is disposed between the first tubular member and the second tubular member, the pressure equalization device including one or more openings to equalize pressure in an interior of a thread connection of the first and the second tubular members with pressure in a bore or an annulus of the first and the second tubular members. | 06-19-2014 |
20140176334 | ELECTRONIC FRAME FOR USE WITH COUPLED CONDUIT SEGMENTS - An electronic frame for use in a downhole component coupling mechanism includes: a first frame element including at least one retaining structure configured to retain an electronic component; and a second frame element configured to be disposed at the first frame element, the second frame element permanently joined to the first frame element to isolate the electronic component from downhole fluids and form the electronic frame, the electronic frame configured to be disposed in a coupling assembly of a first downhole component and a second downhole component and constrained axially by the coupling assembly. | 06-26-2014 |
20140209296 | TUBE LOCKING MECHANISM FOR DOWNHOLE COMPONENTS - An apparatus for securing a transmission line in a downhole component includes: an element coupled to an exterior surface of the transmission line, the transmission line configured to be disposed in a communication conduit that extends through the downhole component, the element configured to restrict axial movement of the transmission line within the communication conduit. | 07-31-2014 |
20140209324 | MAINTAINING TENSION OF A TRANSMISSION LINE IN A TUBULAR - An apparatus for maintaining tension of a transmission line in a tubular includes a first clamp segment configured to surround at least a portion of a transmission line and a second clamp segment configured to surround at least a portion of the transmission line. The second clamp segment has a first axial end and a second axial end. The first axial end is configured to contact an axial end of the first clamp segment, such that the first clamp segment and the second clamp segment are configured to apply a force in opposite radial directions to clamp the transmission line with respect to the tubular to lock a position of the transmission line with respect to the tubular. | 07-31-2014 |
20140332235 | COUPLED ELECTRONIC AND POWER SUPPLY FRAMES FOR USE WITH BOREHOLE CONDUIT CONNECTIONS - An apparatus for retaining electronic components in a downhole component coupling mechanism includes: a power supply frame including a first housing configured to retain a power supply therein and isolate the power supply from downhole fluids, the power supply frame configured to be disposed in and constrained axially by a coupling assembly of a first downhole component and a second downhole component; an electronic component disposed in a second housing in the coupling assembly, the electronic component located external to the power supply frame; and a connector configured to transmit electric power from the power supply to the electronic component to supply electrical power to the electronic component. | 11-13-2014 |
20150027685 | SHOULDER RING FOR TRANSMISSION LINE AND TRANSMISSION DEVICES - A tubular section and a system including the tubular section are described. The tubular section includes a first tubular member including a threaded pin section and a second tubular member, the second tubular member including a threaded box section configured to mate with the threaded pin section. The tubular section also includes a shoulder ring disposed between the first tubular member and the second tubular member, wherein a wall thickness of at least a portion of the shoulder ring is greater than a smallest wall thickness of the threaded pin section of the first tubular member. | 01-29-2015 |
20150041214 | RETENTION DEVICE FOR DRILL PIPE TRANSMISSION LINE - An apparatus for communicating a signal to or from a downhole tool includes a drill pipe configured to be rotated to drill a borehole, a tubular under axial tension and secured in the drill pipe, and a retention device secured to the tubular and configured to maintain the tubular under the axial tension. The retention device includes a portion extending from a body of the device in a direction that is non-inward-radial with respect to a longitudinal axis of the drill pipe. The apparatus further includes a transmission line disposed in the tubular and in an opening of the retention device and in communication with the downhole tool. | 02-12-2015 |
20160049718 | WIRED PIPE COUPLER CONNECTOR - A wired pipe segment includes a body extending from a box end to a pin end and a coupler located in one of the box and pin ends. The coupler includes a carrier having at least one electrical component disposed therein and one or more antennas supported by and spaced from the carrier and being electrically coupled to the carrier through at least one of the electrical components, the antennas being formed in the carrier in a same molding machine. The segment also includes a transmission line extending away from the coupler towards the other of the box and pin end and in communication with the one or more antennas. | 02-18-2016 |