Patent application number | Description | Published |
20090103486 | MIMO Wireless Communication System - A wireless communication method in a MIMO OFDMA system in which users in each of multiple adjacent cells are served by a base station of the cell, the base station having a transmission link to each user in the cell on a respective MIMO channel. The method involves the base station (BS | 04-23-2009 |
20090225687 | ESTIMATION OF EIGEN COHERENCE BANDWIDTH - Closed loop MIMO FDD schemes can offer significant performance gains for OFDM based wireless communication systems over open loop MIMO schemes. However, the pre-coding weights (eigenvectors) on each of the frequency bands need to be updated and this adds extra overhead. The number of adjacent frequency fingers which can use the same pre-coding weights is governed by the coherence bandwidth of the eigen spatial modes. The receiver uses the average r.m.s. delay spread of the SISO channels as an indicator to the eigen coherence bandwidth, rather than explicitly calculating the eigen coherence bandwidth itself. This technique can be applied to TDD schemes as well, where the channel estimation is done with the reverse link, eliminating the need for feedback. The TDD transmitter can estimate the eigen coherence bandwidth on the basis of average r.m.s. delay spread, which saves computational effort. | 09-10-2009 |
20110113299 | Uplink H-ARQ Signalling Mechanism in a Wireless Communication system - A method in a wireless communication system comprising a user equipment, an anchor network station and at least one assisting network station, wherein
| 05-12-2011 |
20120184280 | COVERAGE HOLE COMPENSATION IN A CELLULAR WIRELESS NETWORK - A method for use in providing coverage for at least part of a coverage hole in a first cell or cell sector in a cellular wireless network, in which method a second cell or cell sector is selected, from a group of cells or cell sectors in the cellular wireless network which neighbour the first cell or cell sector, to adapt its coverage so as to cover at least part of the coverage hole in the first cell or cell sector, the method including carrying out an identification process using data relating to a cell or cell sector in the group to identify a cell or cell sector suitable for selection as the second cell or cell sector, the identification process being carried out on one or more cells or cell sectors in the group in turn. | 07-19-2012 |
20120307750 | DYNAMIC RESOURCE ALLOCATION FOR REDUCING INTER-CELL INTERFERENCE - The present invention relates to a method for controlling communication resources in a cellular communication network ( | 12-06-2012 |