Patent application number | Description | Published |
20080316968 | FAST RELAY STATION HANDOVER - A method of signalling a handover condition to a mobile station in a network, comprising the steps of determining handover conditions based on the topology in the network; and signalling a handover condition to the mobile station. A base station and relay station operating in accordance with the method are also disclosed. | 12-25-2008 |
20090154352 | NETWORK SCHEDULING - A method of scheduling transmission between a base station ( | 06-18-2009 |
20090238113 | WIRELESS COMMUNICATIONS APPARATUS - A preamble for use in a packet based communication system is defined on the basis of a preamble for use in a legacy packet based communication system. The preamble is constructed by extracting from the legacy preamble a pilot symbol sequence in frequency of the legacy preamble, replicating the pilot symbol sequence, and concatenating the pilot symbol sequence and the replicated pilot symbol sequence. | 09-24-2009 |
20100208837 | WIRELESS COMMUNICATION METHOD AND APPARATUS - The present invention provides a method of processing information prior to an emission from a multi-antenna device in a multi-user network having at least one user, said emission comprising transmission of a plurality of subcarriers comprising pilot symbols and data symbols, and said information being a data vector, the method comprising arranging said pilot symbols and said data symbols such that at least one of said plurality of subcarriers comprises at least one of said pilot symbols and at least one of said data symbols, wherein said data vector corresponds to said at least one of said plurality of subcarriers such that said data vector comprises data elements corresponding to said at least one of said pilot symbols and said at least one of said data symbols, precoding said data vector prior to transmission, and the precoding comprising applying a perturbation to said data vector in order to generate a perturbed data vector in which data elements corresponding to the pilot symbol remain unperturbed, and scaling said data vector by means of a precoding matrix. | 08-19-2010 |
20100246715 | WIRELESS COMMUNICATION METHOD AND APPARATUS - In a wireless communications system, a method of processing data prior to transmission thereof to a plurality of stations. The method includes determining a channel matrix using a plurality of weighted channel responses, each of which is associated with one of the plurality of stations and weighted by a gain factor corresponding to the station, wherein the gain factor is inversely proportional to a noise power of the station. The data is then processed in accordance with a precoding scheme using the determined channel matrix. | 09-30-2010 |
20110243045 | LINEAR MULTIUSER PRECODING WITH MULTIPLE-RECEIVE ANTENNA RECEIVERS - According to one embodiment there is provided a method performed in a transmitter side of a multiuser minimum square error linear precoding MIMO system that comprises a transmitter with a plurality of transmit antennae and a plurality of receivers. Each receiver of the plurality of receivers comprises a plurality of receive antennae. The method is a method of scheduling receivers from among the plurality of receivers and comprises obtaining, for some or all of the receivers, receiver channel information that quantifies the properties of transmit channels between receiver antennae of the receiver and transmit antennae of the transmitter and establishing an order for determining the receiver combining vectors of the some or all of the receivers. The order is established by selecting as a next receiver in the order a so far unselected receiver from the some or all of the receivers that minimally increases the mean square data transmission error. The establishing of the order is based on the channel information of any receivers previously selected in the order and of unselected receivers. | 10-06-2011 |
20110249613 | REMOTELY WEIGHTED SDMA TRANSMISSION - The present disclosure concerns the harnessing of the effect of a relay to enhance the ability to avoid the effect of interference at mobile stations. This is achieved either by overlaying beamforming for an indirectly reached mobile station so that a relay passes on this beamforming to the mobile station concerned, and retaining orthogonality therewith, or by harnessing a base station and a relay station together so that their combined effect is to provide spatial multiplexing to two or more mobile stations. | 10-13-2011 |
20110249763 | DUAL INDICATOR SCHEME FOR CHANNEL STATE INFORMATION FEEDBACK - Codebook based communication of precoding data between two stations involves determining a ‘best fit’ precoding at a receiving station, on the basis of channel state measurements taken therein. The best fit precoding is compared with pre-agreed entries in a codebook, and an indicator is sent back to the terminal emitting the analysed signal. The determination is separated into two elements, one being sufficient for use with SU-MIMO, and another being provided, with a second codebook indicator, if MU-MIMO is to be employed. This second codebook indicator points to a codebook of eigenvector representations for the multi-user space in which the channel is persisting. | 10-13-2011 |