Patent ID: 8982818
Filing Date: 2015-03-17
Classification: H04L

Abstract:
1. A wireless communications device that transmits a multiplexed signal of a plurality of data sets of different sizes to a communications terminal, comprising: an empty resource block detection section that detects empty resource blocks containing no data among the plurality of data sets to which a predetermined number of resource blocks are allocated in a time direction and a frequency direction; a data redistribution section that redistributes a part of the data that is distributed in the resource blocks to the empty resource blocks that are adjacent to pilot symbols for improving channel estimation accuracy disposed within the empty resource blocks; and a Multi Input Multi Output (MIMO) multiplexing section that performs multiplexing of the plurality of data sets of different sizes to be transmitted to the communication terminal, wherein the data redistribution section preferentially selects the data of the resource element in the order of that most away from the pilot symbol in the frequency direction when the channel variation in the frequency direction is larger than the channel variation in the time direction; wherein the data redistribution section preferentially selects the data of the resource element in the order of that most away from the pilot symbol in the time direction when the channel variation in the time direction is larger than the channel variation in the frequency direction; and wherein the data redistribution section preferentially redistributes data, among the data distributed in the resource blocks, starting with the data that is furthest in the time direction or in the frequency direction from the pilot symbol disposed in the resource blocks to a position adjacent to the pilot symbol.