Radio base station apparatus, mobile terminal device and wireless communication method

摘要

To provide a radio base station apparatus, mobile terminal device and wireless communication method for transmitting and receiving downlink channel quality measurement reference signals in consideration of orthogonalization among transmission antennas, orthogonalization among cells, and interference estimation of high accuracy, in a wireless communication method of the invention, a radio base station apparatus generates channel quality measurement reference signals, performs randomization processing on the channel quality measurement reference signals to be mutually non-orthogonal among at least a part of cells, and orthogonalizes the channel quality measurement reference signals among transmission antennas to transmit to a mobile terminal device together with control information, and the mobile terminal device receives a downlink signal including the control information and the channel quality measurement reference signal, extracts the channel quality measurement reference signal using the control information, and measures channel quality using the channel quality measurement reference signal.

主权项

1. A radio base station apparatus comprising:
a generation section that generates each of channel quality measurement reference signals using a scrambling code associated with a cell ID; a mapping section that maps each of the channel quality measurement reference signals to a resource in time and frequency domains based on a shifting number indicative of a shifting pattern; and a transmission section that performs orthogonalization processing on the channel quality measurement reference signals to be orthogonal among transmission antennas and transmits each of the channel quality measurement reference signals to a mobile terminal device,
wherein the mobile terminal apparatus is notified of the shifting number and a radio resource with no data signal arranged as common control information or dedicated control information, andthe shifting number and the radio resource with no data signal arranged are used as a basis to control transmission of a data signal in the resource in time and frequency domains.