Patent ID: 7881389

Claim:
A reception quality notifying method comprising: receiving a multicarrier signal; measuring reception quality of the multicarrier signal on a subcarrier basis; comparing the measured reception quality of each subcarrier of the multicarrier signal, with a predetermined threshold value: performing format conversion on the comparison result, using a plurality of different references, to generate a plurality of reception quality data that have different formats and that are expressed by bits, the plurality of reception quality data including first reception quality data in which the comparison result is expressed by bits in ascending order of subcarrier numbers of subcarriers constituting the multicarrier signal, and at least one of second reception quality data in which subcarrier numbers of subcarriers with reception quality greater than or equal to the threshold value are expressed by bits based on the comparison result and third reception quality data in which subcarrier numbers of subcarriers with reception quality less than the threshold value are expressed by bits based on the comparison result; selecting reception quality data with a smallest data amount, from the plurality of generated reception quality data; and transmitting the selected reception quality data.