Patent application number | Description | Published |
20090322608 | ANTENNA SYSTEM - Embodiments of the invention are concerned with improvements to antenna systems, in particular beamforming antenna systems. Embodiments provide an improved beamformer arrangement for receiving and transmitting of signals by antenna elements. Embodiments are particularly well suited to use for transceiving of radio signals by base stations, such as are commonly found in cellular networks. In one aspect, embodiments provide a beamformer for use in processing signals received, or transmitted, by a first antenna element, the beamformer comprising a first set of ports and a second set of ports, wherein the first set of ports is connected to at least two antenna elements including said first antenna element and the second set of ports is connected to a connecting port, wherein the beamformer is arranged to generate at least first and second output beams from signals received from the at least two antenna elements and to transform signals received via the second set of ports into signals for transmission by the at least two antenna elements, wherein the beamformer is arranged to combine said generated at least first and second output beams at the connecting port such that said signals from said first antenna element are constructively combined at the connecting port, and to combine said at least first and second output beams at the connecting port such that signals from antenna elements other than the first antenna element are destructively combined at the connecting port, wherein the connecting port is arranged so as to provide access to individual said signals received, or transmitted, by said at least two antenna elements. In particularly preferred arrangements the first set of ports is connected to three or four antenna elements. | 12-31-2009 |
20100248785 | FEEDER CABLE REDUCTION - The present invention allows transmission of multiple signals between masthead electronics and base housing electronics in a base station environment. At least some of the received signals from the multiple antennas are translated to being centered about different center frequencies, such that the translated signals may be combined into a composite signal including each of the received signals. The composite signal is then sent over a single feeder cable to base housing electronics, wherein the received signals are separated and processed by transceiver circuitry. Prior to being provided to the transceiver circuitry, those signals that were translated from being centered about one frequency to another may be retranslated to being centered about the original center frequency. | 09-30-2010 |
20100272089 | METHOD AND APPARATUS FOR PROCESSING MULTIPLE COMMON FREQUENCY SIGNALS THROUGH A SINGLE CABLE USING CIRCULATORS - A method and apparatus for processing multiple signals at a common frequency combined into a single radio frequency cable and subsequently recovering the signals without significant losses, distortion, or cross-talk. The method and apparatus includes processing multiple signals at a common frequency fed through a single radio frequency (RF) cable with or without one or more amplifiers and utilized for either forward or reverse link transmissions. The invention enables a single power amplifier to amplify multiple RF signals that occupy a common frequency channel and after amplification splitting these signals into amplified copies of the originals. The amplified signals may be sent to different antenna ports to illuminate different base station sectors if required. The signal splitting function is performed at the antenna masthead such that this method reduces the number of feeder cables running up the antenna tower by a factor of N, where N is the number of common frequency signals (e.g., the number of sectors) amplified by the single power amplifier. This invention enables a single power amplifier to simultaneously provide all the radio frequency signals necessary to feed a general N input phased array antenna system and form multiple antenna beams uniquely for several individual users simultaneously. | 10-28-2010 |
20110111760 | Method and Apparatus for Co-Scheduling Transmissions in a Wireless Network - The invention relates to a method and apparatus for determining whether two user equipments (UEs) in a wireless network can be co-scheduled by an uplink scheduler. The method includes the determination of orthogonality factors for each pair of equipments to be considered and, from the orthogonality factors, selecting UEs to be co-scheduled. | 05-12-2011 |
20110235683 | ANTENNA SYSTEMS WITH COMMON OVERHEAD FOR CDMA BASE STATIONS - Systems and methods for use in CDMA antenna systems are provided in which signals each having a common overhead component are transmitted on a set of adjacent beams of a sector with a micro-timing offset between signals transmitted on adjacent pairs of beams which is large enough that destructive cancellation substantially does not occur between the pair of beams. | 09-29-2011 |
20120001801 | Antenna System - A beamformer is arranged to receive an input from a first antenna element and from at least one other antenna element and to generate at least a first and second output beam. The first and second output beams are combined at a connecting port such that signals received at the first antenna element are constructively combined at the connecting port and signals received at another antenna element or elements are destructively combined at the connecting port, so that a receiver connected to the connecting port may receive signals from the first antenna element and may not receive signals from the other antenna element or elements. The arrangement may also be used to transmit a signal which is fed into the connecting point from the first antenna element and not from the other antenna element or elements. | 01-05-2012 |
20120058720 | FEEDER CABLE REDUCTION - The present invention allows transmission of multiple signals between masthead electronics and base housing electronics in a base station environment. At least some of the received signals from the multiple antennas are translated to being centered about different center frequencies, such that the translated signals may be combined into a composite signal including each of the received signals. The composite signal is then sent over a single feeder cable to base housing electronics, wherein the received signals are separated and processed by transceiver circuitry. Prior to being provided to the transceiver circuitry, those signals that were translated from being centered about one frequency to another may be retranslated to being centered about the original center frequency. | 03-08-2012 |
20120076019 | Methods, Testing Apparatuses and Devices for Removing Cross Coupling Effects in Antenna Arrays - Methods and devices for removing cross coupling effects between elements of an antenna array ( | 03-29-2012 |
20130010834 | Antenna Systems with Common Overhead for CDMA Base Stations - Systems and methods for use in CDMA antenna systems are provided in which signals each having a common overhead component are transmitted on a set of adjacent beams of a sector with a micro-timing offset between signals transmitted on adjacent pairs of beams which is large enough that destructive cancellation substantially does not occur between the pair of beams. | 01-10-2013 |
20130207843 | DETERMINATION OF AN IMPAIRMENT COMPENSATION MATRIX FOR AN ANTENNA ARRAY - Determination of an impairment compensation matrix for compensation of impairments in an antenna array is disclosed. A plurality of different combinations of multi-signal transmissions which form at least one null at a respective location of a plurality of locations is determined. Each combination includes a multi-signal transmission that comprises at least two concurrent signal transmissions from at least two antenna subarrays of N antenna subarrays and the respective location. Based on signal characteristics associated with the plurality of different combinations of multi-signal transmissions and an expected signal reception at the plurality of locations, an impairment matrix that identifies an effect of impairments among the N antenna subarrays is determined. The impairment compensation matrix is determined based on the impairment matrix. | 08-15-2013 |
20140133317 | ADAPTIVE TRANSMISSION MODE SWITCHING | 05-15-2014 |
20140302883 | Co-Scheduling Based on Steering Vector Orthogonality - The invention relates to a method and apparatus for determining whether two user equipments (UEs) in a wireless network can be co-scheduled by an uplink scheduler. The method includes the determination of orthogonality factors for each pair of equipments to be considered and, from the orthogonality factors, selecting UEs to be co-scheduled. | 10-09-2014 |
20150085950 | ANTENNA SYSTEMS WITH COMMON OVERHEAD FOR CDMA BASE STATIONS - Systems and methods for use in CDMA antenna systems are provided in which signals each having a common overhead component are transmitted on a set of adjacent beams of a sector with a micro-timing offset between signals transmitted on adjacent pairs of beams which is large enough that destructive cancellation substantially does not occur between the pair of beams. | 03-26-2015 |