Patent application number | Description | Published |
20130235851 | METHODS AND APPARATUS TO TRANSMIT AND RECEIVE SYNCHRONIZATION SIGNALS IN A MOBILE COMMUNICATION SYSTEM - Beam-steered millimeter wave signals transmitted in each of n sector slices include a sequence of primary synchronization (PSCH) symbols within predetermined symbol positions in at least one slot of a subframe. The symbols in consecutive symbol positions are each transmitted on a different one of the n slices, with the first symbol repeated on the same slice at the end. The sequence order rotates cyclically in each subframe so that two PSCH symbols are transmitted on one slice in a single subframe every nth subframe. Secondary synchronization (SSCH) and Broadcast Channel (BCH) symbols are transmitted in a predetermined pattern following the sequence of PSCH symbols. By transmitting consecutive PSCH symbols on different slices and repeating the first symbol, the mobile station can detect the best slice and beam by switching receive beams every subframe instead of every slot, relaxing time constraints on AGC adjustment while avoiding the start-at-the-edge problem. | 09-12-2013 |
20130301619 | METHODS AND APPARATUS FOR UPLINK TIMING ALIGNMENT IN SYSTEM WITH LARGE NUMBER OF ANTENNAS - A mobile station is configured to perform a method for uplink timing alignment in a wireless network. The method includes receiving a first downlink synchronization signal from a base station on a first beam pair at a first time associated with a first propagation delay. The method also includes receiving a second downlink synchronization signal from the base station on a second beam pair at a second time associated with a second propagation delay. The method further includes determining a second timing advance for the second beam pair based on a known first timing advance for the first beam pair and a time difference between the first time and the second time. | 11-14-2013 |
20140016620 | METHODS AND APPARATUS FOR TRANSMISSION OF UPLINK SOUNDING REFERENCE SIGNALS IN A COMMUNICATION SYSTEM WITH LARGE NUMBER OF ANTENNAS - Methods for preventing timing collisions in a wireless communication network include transmitting a data uplink symbol of normal duration via a first base pair using a first timing advance (TA) corresponding to the first base pair. Scheduling to transmit a second uplink symbol via a second base pair (BP) corresponding to the transmit RF chain. Predicting a timing collision will occur based on a different between the first TA and a second TA corresponding to the second BP. Preventing the timing collision by: reducing the duration of the second symbol by an adjustment amount calculated based on the first TA and the second TA; inserting a guard interval to delay transmission of the second symbol by the calculated adjustment amount; and increasing the duration of a cyclic prefix of the second symbol but refraining from transmitting a portion of the enlarged CP. | 01-16-2014 |
20140334564 | METHOD AND SYSTEM FOR PROVIDING LOW-COMPLEXITY HYBRID PRECODING IN WIRELESS COMMUNICATION SYSTEMS - A method for providing low-complexity hybrid precoding is provided. The method includes identifying a subset of a plurality of precoding sets as a reduced search space. A search is performed over the reduced search space for a preferred precoding set. Identifying the reduced search space may include determining at least one parameter, such as received power, for each of a plurality of beam directions. | 11-13-2014 |
20150124738 | CHANNEL ESTIMATION FOR DATA TRANSMISSION PARAMETER DETERMINATION IN SYSTEMS EMPLOYING AN ARRAY-OF-SUBARRAYS TRANSCEIVER ARCHITECTURE - A method and an apparatus for channel estimation. The method includes identifying a set of preferred BS receive beams for each of a plurality of BS antenna SAs based on periodic pilot transmissions from a UE transmitted using predefined UE transmit beams. The method also includes transmitting a request for the UE to transmit pilot signals for the set of preferred BS receive beams. The method further includes receiving the pilot signals using the set of preferred BS receive beams. The method also includes performing channel estimation and determining the data transmission parameters based on the received pilot signals, the data transmission parameters including at least one receive beam at each UE antenna SA to be used for data reception. Additionally, the method includes transmitting, to the UE, information for identifying the at least one receive beam at each UE antenna SA to be used for data reception. | 05-07-2015 |
20160028454 | METHOD AND APPARATUS FOR FACILITATING HIGH DATA RATE TRANSMISSION IN THE WIRELESS COMMUNICATION - A method for a wireless device capable of receiving and transmitting a signal includes receiving a reference signal from a second wireless device through a communication channel, estimating the communication channel, using the reference signal, selecting a pair of an analogue digital converter (ADC) quantizer and an input distribution, based on the estimated communication channel, and sending information on the selected input distribution and the ADC quantizer to the second wireless device. A wireless device capable of wirelessly receiving and transmitting a signal includes a transceiver configured to receive a reference signal from a second wireless device through a communication channel, and a processor configured to estimate the communication channel, using the reference signal, selecting a pair of an ADC quantizer and an input distribution, based on the estimated communication channel, and sending information on the selected input distribution and the ADC quantizer to the second wireless device. | 01-28-2016 |
Patent application number | Description | Published |
20150269126 | PORTLET DISPLAY ON PORTABLE COMPUTING DEVICES - A portal page may be displayed in the active area of a portable computing device display. The portable computing device may receive display data that includes original page display instructions specifying how to display a plurality of portlets within a common page. The personal computing device may identify an initial portlet of the plurality of portlets and remove portlets, other than the initial portlet, from the original page display instructions to produce modified page display instructions having at least one transition instruction. The personal computing device may scale, based upon the modified page display instructions, the initial portlet to render within the active display area; and render, based upon the scaled initial portlet, a web page within the active display area. | 09-24-2015 |
20150269128 | PORTLET DISPLAY ON PORTABLE COMPUTING DEVICES - A portal page may be displayed in the active area of a portable computing device display. The portable computing device may receive display data that includes original page display instructions specifying how to display a plurality of portlets within a common page. The personal computing device may identify an initial portlet of the plurality of portlets and remove portlets, other than the initial portlet, from the original page display instructions to produce modified page display instructions having at least one transition instruction. The personal computing device may scale, based upon the modified page display instructions, the initial portlet to render within the active display area; and render, based upon the scaled initial portlet, a web page within the active display area. | 09-24-2015 |