Patent ID: 8121537
Filing Date: 2012-02-21
Classification: H04L

Abstract:
1. A channel sounding apparatus for a Mobile Station (MS) in a wireless communication system, comprising: a baseband Modulator-Demodulator (MODEM) for generating as many channel sounding signals as the MS has antennas and outputting the channel sounding signals to an antenna switch; and the antenna switch for switching the channel sounding signals to the antennas in a one-to-one basis and transmitting the channel sounding signals to a Base Station (BS) through all of the antennas of the MS, wherein the antennas include a data transmit and receive antenna and a data receive antenna, further comprising at least one antenna for transmitting a channel sounding signal received from the antenna switch to the BS in an allocated uplink period, wherein the channel sounding signals are allocated to one of a plurality of symbols and a plurality of channels in an uplink frame, and wherein the antenna switch transmits a channel sounding signal through an antenna in a first symbol, transmits a channel sounding signal through another antenna in a second symbol, and transmits channel sounding signals through remaining antennas in remaining symbols in the same manner.