Patent ID: 8385218
Filing Date: 2013-02-26
Classification: H04L

Abstract:
1. A communication apparatus for communicating by using a plurality of subcarriers and transmitting feedback information generated based on channel conditions of the plurality of subcarriers to a communicating destination apparatus, comprising: a discrete cosine transform section which performs discrete cosine transform on the channel conditions of the plurality of subcarriers; a dividing section which divides a plurality of sample components obtained by the discrete cosine transform into a plurality of groups each including one or more sample components, the division based on frequency of the sample components; and a quantizing section which performs quantization corresponding to beforehand-set indices for each group, the indices defining a correspondence between one or more instances of a variable quantization parameter and the respective frequency divisions of the respective groups, wherein the feedback information is a result of the quantization, and the plurality of groups including at least a high-frequency group and a low-frequency group, the high-frequency group comprising sample components, from the plurality of sample components, that have a frequency that is higher than the frequency of sample components that constitute the low-frequency group.