Patent ID: 8509329
Filing Date: 2013-08-13
Classification: H04L

Abstract:
1. A data transmission apparatus, comprising: a constellation mapping unit configured to apply a first constellation mapping scheme to a first data frame; and a transmission unit configured to transmit the first data frame to a data receiving apparatus, wherein the data receiving apparatus receives the first data frame, receives, from a second data transmission apparatus, a second data frame where a second constellation mapping scheme is applied, and discriminates the first data frame and the second data frame in accordance with each of the first and second constellation mapping schemes, wherein the first data frame is modulated using an orthogonal frequency division multiplexing (OFDM) scheme. wherein the constellation mapping unit is further configured to group, into a first sub carrier group and a second sub carrier group, a plurality of sub carriers of an OFDM symbol included in the first data frame, and wherein the first constellation mapping scheme applies a constellation mapping scheme mutually different with respect to the first sub carrier group and the second sub carrier group.