Abstract:
A transmitting apparatus for modulating data based on a predetermined 2q-QAM constellation and a receiving apparatus and method for demodulating a signal based on the predetermined 2q-QAM constellation, wherein the last q-2 bits corresponding to a quadrant of the predetermined 2q-QAM constellation are same with a gray code of a 2q-2-QAM constellation, the last q-2 bits corresponding to the remaining quadrants of the predetermined 2q-QAM constellation are determined by performing symmetric transformation for the last q-2 bits of the quadrant of the predetermined 2q-QAM around the x-axis or the y-axis.
Abstract:
A method and an apparatus for constituting a feedback signal for hybrid automatic repeat request (HARQ) are provided. Arbitrary two feedback states of feedback states which may occur for two frames may be integrally processed into one state. In addition, the feedback signal including information indicating the feedback state determined for the two frames is constituted and transmitted.
Abstract:
Disclosed herein are a method and an apparatus for transmitting an uplink control channel for a high speed terminal. In a method for transmitting an uplink control channel in a mobile communication system, an uplink control channel signal is generated depending on at least one resource index received from a base station and the uplink control channel signal is transmitted to the base station through a resource block corresponding to the resource index. A location where the uplink control channel signal is allocated is changed depending on the resource index.