Patent application number | Description | Published |
20130022139 | CORRELATION-MATRIX FEEDBACK METHOD AND SYSTEM FOR ANTENNA ARRAY - The present invention provides a correlation-matrix feedback method and system for an antenna array. The method comprises steps of: selecting, at a receiving end, a codeword from a predetermined correlation-matrix codebook comprising a plurality of codewords according to a predetermined criterion to represent a correlation matrix to be fed back ( | 01-24-2013 |
20130022141 | TRANSFORMATION APPARATUS AND METHOD - The present invention provides a transformation apparatus for transforming a long-term wideband channel property feedback. The transformation apparatus comprises: a first transformation unit for constructing an estimation R | 01-24-2013 |
20130028340 | CHANNEL STATUS INFORMATION FEEDBACK - The present invention provides a method and system for channel status information feedback based on a hierarchical codebook, the method comprising steps of: generating a hierarchical codebook; configuring the generated hierarchical codebook to a transmit end and a receive end, respectively; and feeding back channel state information from the receive end to the transmit end based on the hierarchical codebook, wherein the step of generating a hierarchical codebook further comprises the following steps: i) dividing each level of codeword in a to-be-generated codebook into a plurality of segments based on a basic codebook; ii) a module configured to generate each level of codeword in a first stage, wherein the each level of codeword is selected from the basic codebook; and iii) generating each level of codeword in other stages, wherein the each level of codeword is selected a pre-provided training sample matrix. And the feeding back the channel status information from the receiving end to the transmitting end based on the hierarchical codebook further comprises using a first bit and a second bit of the feedback bits to represent a signaling for performing tree search to the hierarchical codebook. | 01-31-2013 |
20130028344 | METHOD AND APPARATUS FOR INFORMATION FEEDBACK AND PRECODING - Methods and apparatuses for information feedback and precoding have been provided. A method for processing communication data at a user equipment in a wireless communication system may comprise: deriving a spatial correlation matrix R of multiple transmit antennas of a base station based on an obtained downlink channel transmission matrix H; transforming a precoding codebook F according to the spatial correlation matrix R; selecting a precoding matrix F | 01-31-2013 |
20130088981 | METHOD AND DEVICE FOR PERFORMING HIERARCHY FEEDBACK WITH SPACE INFORMATION-ASSISTED - A method for performing hierarchical feedback with space information assisted in a mobile communication system is provided. At the user terminal, the method comprises: measuring a space correlated matrix of multiple transmit antennas of a base station; converting a hierarchical code book in the mode of hierarchical feedback by using the spatial correlation matrix; selecting the code word from the converted hierarchical code book; and feedbacking a pre-coding matrix index corresponding to the index of the selected code word and the space correlated correlation matrix from the user terminal to the base station by using the mode of hierarchical feedback. | 04-11-2013 |
20130089158 | METHOD AND DEVICE FOR OBTAINING PRECODING MATRIX - The present invention provides a method and device for obtaining precoding matrix. A network apparatus comprises a plurality of groups of cross-polarized linear array antennas. The method comprises: obtaining first channel indicating information indicating a first code word; obtaining second channel indicating information indicating a second code word; determining the precoding matrix, according to the first channel indicating information and the second channel indicating information, the first code word and/or the second code word comprises phase shifts and/or amplitude differences among the plurality of groups of cross-polarized linear array antennas. Since the first code word and the second code word for determining the precoding matrix by the network apparatus comprise phase shifts and amplitude differences among cross-polarized linear array antennas, the phase shifts and amplitude differences among cross-polarized linear array antennas are considered when the network apparatus sends downlink data according to the precoding matrix, so as to be able to improve the receiving quality of the sent data, thereby improving the system performance effectively. | 04-11-2013 |
20130089165 | METHOD OF DETERMINING PRECODING MATRIX AND CORRESPONDING COMMUNICATION METHODS AND DEVICES - In order to improve the performance of the precoding scheme for closely-spaced cross-polarized CLA antennas, the invention proposes a new precoding codebook and precoding matrix. The invention also proposes a method for determining precoding matrix based on the new precoding codebook, and corresponding method and device for communicating by using this precoding matrix. The precoding codebook and matrix proposed in the invention has better performance. | 04-11-2013 |
20130170578 | METHOD FOR DETERMINING PRECODING MATRIX AND CORRESPONDING COMMUNICATION METHODS AND DEVICES - A method for determining precoding matrix for the sub-band precoding in a transmitter, wherein the transmitter has M transmitting antennas, and the method comprises: a. determining an optimized first matrix W | 07-04-2013 |
20130188745 | METHOD AND APPARATUS FOR SUB-SAMPLING OF A CODEBOOK IN LTE-A SYSTEM - The embodiments of the present invention disclose a method and an apparatus for sub-sampling of a codebook in the LTE-A system where a precoding matrix W is a product of two matrices W | 07-25-2013 |
20130195064 | METHOD AND APPARATUS FOR IMPROVING ACCURACY OF TRANSMITTING CSI VIA PUCCH - The present invention discloses a method and apparatus for improving the accuracy of transmitting CSI via PUCCH. The method for improving the accuracy of transmission of channel status information via the physical uplink control channel comprises reducing the number of bits of other channel information transmitted via the physical uplink control channel under the condition that the payload of the physical uplink control channel remains unchanged, and utilizing the thus-saved bits to transmit the channel state information to reduce the degree of sub-sampling the channel state information and thereby improve the accuracy of transmission of the channel status information via the physical uplink control channel. According to the present invention, system performance loss can be reduced. | 08-01-2013 |