Patent application number | Description | Published |
20090276684 | MULTI-ANTENNA CONFIGURATION SIGNALING IN WIRELESS COMMUNICATION SYSTEM - A wireless communication infrastructure entity ( | 11-05-2009 |
20100034314 | Antenna Configuration and Transmission Mode Signaling In Wireless Communication System - A wireless communication infrastructure entity including a transceiver communicably coupled to a controller configured to generate a handover message having a multi-bit field, the controller configured to set a value of the multi-bit field, the value of the multi-bit field jointly encoded to indicate both a transmission mode to be used after handover and an antenna configuration of a target | 02-11-2010 |
20110085588 | METHOD FOR PRECODING BASED ON ANTENNA GROUPING - A method an apparatus for performing uplink transmission in a user device with a plurality of transmit antennas, including transmitting a first data stream from a first subset of the antennas according to a first precoding vector wherein the first precoding vector may be any vector in a precoding codebook, and transmitting a second data stream from a second subset of the antennas according to a second precoding vector wherein any vector in the precoding codebook may be used for the second precoding vector when the second precoding vector is the same as the first precoding vector to within a scaling factor. | 04-14-2011 |
20110274059 | MULTIPLEXING CONTROL AND DATA ON MULTILAYER UPLINK TRANSMISSIONS - The present disclosure relates to resource allocation in multi-layer transmissions in transmissions of user data and control information. A wireless terminal allocates resources in a multi-layer transmission for one more types of control information based on scheduling information and control allocation parameters. The multi-layer transmission includes control information and one or more user data streams that are mapped to multiple transmission layers and transmitted by the wireless terminal. | 11-10-2011 |
20110317542 | Method and Apparatus for Diversity Transmission Scheme in Single-Carrier FDMA Systems - The disclosure relates to transmission of user data over multiple transmission layers in a wireless communication system with single-carrier orthogonal frequency division multiple access. A wireless terminal performs transform precoding on a vector of digital modulation symbols and the resulting complex-valued symbols are mapped to frequency/time/space resources. The digital modulation symbols are reordered, modified by a setting of complex-valued functions, and transform precoded. The resulting second set of complex-valued symbols are transform precoded and mapped to frequency/time/space resources. | 12-29-2011 |
20120087424 | Uplink Precoding For Retransmission Without Explicit Precoding Instruction - A method in a wireless communication device includes receiving precoding matrix information including first and second precoding submatrices, transmitting a first transport block from a first set of at least two antennas according to the first precoding submatrix and a second transport block from a second set of at least two antennas according to the second precoding submatrix, receiving a retransmission request for the second transport block, and retransmitting the second transport block according to a retransmission precoding matrix from at least one of the first set of antennas and at least one of the second set of antennas. | 04-12-2012 |
20120151306 | MULTI-ANTENNA CONFIGURATION SIGNALING IN WIRELESS COMMUNICATION SYSTEM - A wireless communication infrastructure entity including a transceiver coupled to a controller configured to generate parity bits based on an information word. The controller is also configured to encode the parity bits based on a communication configuration, e.g., symbol information, wherein the encoded parity bits are combined with the information word for transmission by the transceiver. A user terminal in receipt of the information word includes a controller configured to determine the communication configuration based on a set of configuration indicator bits used to encode the parity bits. | 06-14-2012 |
20130114425 | METHOD AND APPARATUS FOR RANK ADAPTATION IN AN ORTHOGONAL FEQUENCY DIVISION MULTIPLEXING COMMUNICATION SYSTEM - A communication system provides for adaptive rank determination, for example, a rank 2 transmission in instances where a rank 1 transmission may be indicated under supported feedback modes in current standards where no explicit power adaptation can be assumed, for example, where a user equipment (UE) is limited to reporting a rank 1 channel due to a large dynamic range of a signal or due to a signal received by the UE from one base station (BS) antenna port drowning out a signal received by the UE from another BS antenna port. The communication system provides for the UE to implement rank 2 transmission in such instances by using per-antenna port power control at a BS serving the UE. In one embodiment, the BS controls the rank determination at the UE by signaling transmit power or power offset related parameters to use for rank and transmission parameters determination and feedback. | 05-09-2013 |
20130196606 | UPLINK POWER CONTROL IN COORDINATED MULTI-POINT WIRELESS COMMUNICATION SYSTEM - A wireless communication device includes a transceiver and a processor configured to determine a path loss between each of a plurality of communication nodes and the wireless communication device, determine an effective path loss based on the path loss determined for the each of the plurality of communication nodes and based on a corresponding weight for each of the plurality of communication nodes, and configured to determine a transmit power of the wireless communication device based on the effective path loss. | 08-01-2013 |
20130202015 | Gain Normalization Correction of PMI and CQI Feedback for Base Station with Antenna Array - A wireless communication device and a method therein includes estimating a channel for each of a plurality of transmit antenna ports using a reference symbol received from the corresponding antenna port, determining a composite channel estimate based on the estimated channels and based on a precoding matrix, and determining an updated composite channel estimate using the composite channel estimate and using a gain correction corresponding to the precoding matrix. The gain correction can be obtained over-the-air or computed at the wireless communication device. | 08-08-2013 |
20140018123 | METHOD AND SYSTEM FOR MANAGING TRANSMIT POWER ON A WIRELESS COMMUNICATION NETWORK - The present disclosure sets forth multiple embodiments of the invention. Among those embodiments is a method for managing the power of an uplink signal (e.g., an LTE PUSCH or PUCCH). The method involves determining a convolution of a first function and a second function (which may be power density functions) of the uplink signal and determining the power of the uplink signal based on the convolution. The uplink signal comprises one or both of a data signal (transmitted over a PUSCH, for example) and a control signal (transmitted over a PUSCH or PUCCH, for example). The uplink signal is transmitted over one or more subcarriers (which may be carried by resource blocks, for example). | 01-16-2014 |
20140126440 | METHOD AND SYSTEM FOR MANAGING TRANSMIT POWER ON A WIRELESS COMMUNICATION NETWORK - The present disclosure sets forth multiple embodiments of the invention. Among those embodiments is a method for determining a maximum power reduction of an uplink signal. The uplink signal is transmitted on a carrier that has a range of frequencies. Frequencies outside of the carrier frequency range include adjacent channel regions. Resource blocks of the carrier that have been allocated for use by to transmit the uplink signal are identified. A power spectral density is determined based on the identified resource blocks. A metric that is based on a third order convolution of the power spectral density function is determined. A maximum power reduction for the adjacent channel regions is also determined based on the metric. | 05-08-2014 |
20140177683 | METHOD AND APPARATUS FOR ANTENNA ARRAY CHANNEL FEEDBACK - A method and apparatus provide antenna array channel feedback. The method can include receiving, at a wireless terminal, a set of channel state information reference signals. The method can include determining, by the wireless terminal, based on the received set of channel state information reference signals, a precoding matrix that is a product of a first precoding matrix and a second precoding matrix. The first precoding matrix can have at least a representation in terms of a representation matrix. The representation matrix can be based on a matrix selected from a first codebook. The second precoding matrix can be based on a second codebook. The method can include transmitting, by the wireless terminal, a representation of at least one of the first precoding matrix and the second precoding matrix. | 06-26-2014 |
20140177744 | METHOD AND APPARATUS FOR ANTENNA ARRAY CHANNEL FEEDBACK - A method and apparatus provide antenna array channel feedback. The method can include receiving, at a wireless terminal, a set of channel state information reference signals. The method can include determining a precoding matrix based on the received set of channel state information reference signals. The precoding matrix can have a representation in terms of three components. The first component of the three components can be determined from a first set of vectors. The second component of the three components can be determined from a first set of parameters. The third component of the three components can be determined from a second set of parameters. The second set of parameters can be a set of unit-magnitude scalars. The method can include transmitting, by the wireless terminal, a representation of at least one of the first component, the second component, and the third component. | 06-26-2014 |
20140177745 | METHOD AND APPARATUS FOR ANTENNA ARRAY CHANNEL FEEDBACK - A method and apparatus provide antenna array channel feedback. The method can include receiving a first set of channel state information reference signals on resource elements, and a second set of channel state information reference signals on resource elements. The method can include determining a first precoding matrix based on the received first set of channel state information reference signals. The first precoding matrix can be chosen from a first codebook. The method can include determining a second precoding matrix based on the second set of channel state information reference signals. The second precoding matrix can be chosen from a second codebook that is different than the first codebook. The method can include transmitting a representation of at least one of the first precoding matrix and the second precoding matrix. | 06-26-2014 |
20140254508 | METHOD FOR CODEBOOK ENHANCEMENT FOR MULTI-USER MULTIPLE-INPUT MULTIPLE-OUTPUT SYSTEMS - A wireless terminal is capable of receiving a pilot signal from a base station; and determining a precoding matrix as a linear combination of two matrices V | 09-11-2014 |
20140362938 | METHODS FOR CODEBOOK SUB-SAMPLING - Disclosed are methods for codebook sub-sampling. In various implementations, a wireless terminal receives a reference signal, determines, based on the reference signal, a first precoding index i | 12-11-2014 |