Patent application number | Description | Published |
20110305263 | Methods Providing Precoder Feedback Using Multiple Precoder Indices and Related Communications Devices and Systems - Data may be transmitted from a first communications device using multiple antennas to a second communications device based on precoder feedback defining a grid of transmission beams. A first precoder index may be received from the second communications device, and a second precoder index may be received from the second communications device. At least one symbol stream may be processed based at least in part on the first and second precoder indices to generate antenna signals for respective antenna elements of the multiple antennas, and the antenna signals may be transmitted over the multiple antennas to the communications device. Related base stations and user equipment are also discussed. | 12-15-2011 |
20130195161 | Method and Arrangement in a Wireless Communication System - The invention relates to methods and arrangements for rank adaptation for transmissions over a multipie-input-muttipie-output, M1MO, channel in a wireless communications system. A receiving node ( | 08-01-2013 |
20130229980 | Radio Base Station and Method Therein for Transmitting a Data Signal to a User Equipment in a Radio Communications Network - Embodiments herein relate to a method in a radio base station ( | 09-05-2013 |
20130230081 | Radio Base Station and Method Therein for Transforming a Data Transmission Signal - Embodiments herein relate to a method in a radio base station ( | 09-05-2013 |
20130242769 | Induced Incoherency for Joint Transmission - Frequency-selective phase shifts are applied to signals transmitted from multiple transmission points involved in a coordinated (joint) transmission to a given UE. An eNodeB or other network node controlling the joint transmission artificially induces frequency selectivity between signals received by the UE in joint transmission from different transmission points, so as to ensure an even balance between constructive and destructive combination over frequency. By applying frequency-selective phase shifts (e.g., pseudo-random phase shifts) to the different transmission points that perform joint transmission, the signals from the different transmission points are forced to combine at the UE in a non-coherent manner. As a result, uncertainty in how the signals combine is drastically reduced, since it can be expected that the signals will always combine incoherently. The reduced uncertainty translates to reduced back-off offset in the link adaptation, and thus in an increased throughput. | 09-19-2013 |
20130242773 | NODE AND METHOD FOR GENERATING BEAMFORMED FOR DOWNLINK COMMUNICATIONS - Example embodiments presented herein are directed towards an eNodeB, and method therein, for generating downlink communications in a multiple antenna system. The method comprises transmitting, to a number of user equipments, a plurality of reference signals, where each signal is beamformed in a distinct direction within at least one correlated domain (e.g., elevation and/or azimuth). The eNodeB receives at least one CSI report from a specific user equipment and determines a primary reference signal based on, for example, the at least one CSI report. The eNodeB may thereafter generate downlink communication signals for antenna element(s) and/or subelements of the multiple antenna system. The downlink communication signals are beamformed into a transmitting direction that aligns most closely with a beamforming direction of the at least one primary reference signal, as compared to any other beamforming direction of the reference signals. | 09-19-2013 |
20130286866 | Configuring Channel-State Information Resources used for Reference-Signal-Received-Power Feedback - The initialization of the CoMP Resource Management Set for a given mobile terminal is based, at least in part, on an estimation of the mobile terminal's geographical location, which can be estimated using network positioning of the mobile terminal. One example method begins with the acquisition ( | 10-31-2013 |
20130301432 | Methods and Arrangements for CSI Reporting - Some embodiments provide a method in a wireless device for reporting channel state information, CSI, for a CSI process. The CSI process corresponds to a reference signal resource and an interference measurement resource. According to the method, the wireless device obtains an adjustment value associated with the CSI process. The wireless device estimates an effective channel based on one or more reference signals received in the reference signal resource, and applies the adjustment value to the estimated effective channel, thereby obtaining an adjusted effective channel. Furthermore, the wireless device determines channel state information based on the adjusted effective channel, and on interference estimated based on the interference measurement resource. Finally, the channel state information is transmitted to a network node. | 11-14-2013 |
20130303090 | Methods and Arrangements for CSI Reporting - Some embodiments provide a method in a wireless device for reporting channel state information, CSI, for a CSI process. The CSI process corresponds to a reference signal resource and an associated interference measurement resource, IMR. According to the method, the wireless device obtains an interference power adjustment value. The wireless device estimates interference and noise based on the IMR, and on the interference power adjustment value. Furthermore, the wireless device determines channel state information based on an estimated effective channel measured based on the reference signal resource, and on the estimated interference and noise. Finally, the wireless device transmits the channel state information to a network node. | 11-14-2013 |
20130328722 | NODE AND METHOD FOR ESTABLISHING BEAMFORMING FOR DOWNLINK COMMUNICATIONS - Example embodiments presented herein are directed towards an eNodeB ( | 12-12-2013 |
20130329649 | BEAMFORMED DOWNLINK COMMUNICATIONS FOR A MULTIPLE ANTENNA SYSTEM - Some of the example embodiments presented herein are directed towards an eNodeB ( | 12-12-2013 |
20130329772 | DATA TRANSMISSION IN A MULTIPLE ANTENNA SYSTEM - Some of the example embodiments presented herein are directed towards an eNodeB ( | 12-12-2013 |
20140073313 | Artificial Interference Injection for Channel State Information Reporting - A system and method for improving the link adaptation in a wireless communication system is disclosed. User Equipment (UE) forms an interference hypothesis by amending a measured interference and noise by artificially injecting, to the measured interference and noise, interference corresponding to at least one emulated interfering isotropic signal that is virtually transmitted over an associated estimated effective channel. The UE further determines at least one channel state information (CSI) report based on the interference hypothesis, and transmits the CSI report to the network. | 03-13-2014 |
20140112173 | Configuration of Coordinated Multipoint Transmission Hypotheses for Channel State Information Reporting - A system and method for providing an eNodeB with the flexibility to configure a Channel State Information (CSI) report to match a specific Coordinated Multipoint (CoMP) transmission hypothesis, which is a candidate for a downlink transmission to a User Equipment (UE) is disclosed. A UE receives, from the eNodeB, a configuration message that specifies a CSI report. The CSI report is specified by a particular interference hypothesis and a particular desired signal hypothesis corresponding to data transmission over at least one effective channel characterized by a specific reference signal. The UE estimates interference according to the interference hypothesis, and/or estimates at least one effective channel by performing measurements on the specific reference signal, and determines a CSI report based on the interference estimation and on the estimated effective channel. The UE also transmits the CSI report to the eNodeB. | 04-24-2014 |
20140112248 | Load-Invariant Configuration of Interference Measurement Resources - According to one aspect of this disclosure, the configuration of which Interference Measurement Resources, “IMRs”, a given user equipment, “UE”, should measure for Channel State Information, “CSI”, reporting is made more or less invariant to dynamic traffic variations affecting the set of Coordinated Multi-Point, “CoMP”, transmission points used for serving the UE, or to the use of dynamic blanking for those transmission points. These goals are achieved at least in part by configuring one or more of the transmission points to follow a first rule embodying a negative logic. According to the first rule, the transmission point transmits on a given IMR if it has been deemed as being not likely to transmit data at a time relevant to the IMR, and, conversely, to not transmit the IMR if it has been deemed as being likely to transmit data at a time relevant to the IMR. | 04-24-2014 |