Patent ID: 7590045
Filing Date: 2009-09-15
Classification: H04L

Abstract:
1. An apparatus for transmitting uplink fast feedback information in a wireless communication system, the apparatus comprising: a channel encoder for inputting uplink fast feedback information to transmit, and outputting 3-bit codewords being set according to the fast feedback information; a noncoherent modulator for modulating transmission symbols corresponding to the codewords using a noncoherent modulation scheme; and an inverse fast Fourier transform (IFFT) unit for generating a transmission signal comprised of subcarrier bundles by IFFT-processing the modulated transmission symbols before transmission, wherein the 3-bit codewords are represented as 3-bit payloads as follows: wherein the fast feedback vector index is represented as a vector index as follows: and wherein orthogonal vectors P0, P1, P2 and P3, each of which indicates a Quadrature Phase Shift Keying (QPSK) modulation symbol, can be expressed by: