Patent ID: 9184891
Filing Date: 2015-11-10
Classification: H04B,H04L,H04W

Abstract:
1. A communication apparatus, comprising: a receiver which, in operation, receives a downlink signal including a sounding reference signal (SRS) that is mapped to a SRS transmission band, the SRS transmission band being provided at a portion of a system band that includes a plurality of resource blocks (RBs), the plurality of resource blocks (RBs) being divided into a plurality of resource block groups (RBGs), and a frequency position of an edge of one of the plurality of RGBs being aligned with a frequency position of an edge of the SRS transmission band; and an estimator which, in operation, estimates a channel quality indicator (CQI) using the SRS, a number of RBs included in the SRS transmission band being a multiple of a number of RBs that form one RBG.