APPARATUS AND METHOD FOR TRANSMITTING/RECEIVING A SIGNAL IN A BEAM FORMING/MULTIPLE INPUT MULTIPLE OUTPUT-ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING COMMUNICATION SYSTEM

摘要

A signal transceiving system in a beam forming MIMO(Multiple Input Multiple Output)/OFDM(Orthogonal Frequency Division Multiplexing) communication system and a method thereof are provided to reduce uplink load and to increase the resource efficiency of the beam forming MIMO/OFDM by minimizing fed back information with the resource selection. A method of a signal transceiving system in a beam forming MIMO(Multiple Input Multiple Output)/OFDM(Orthogonal Frequency Division Multiplexing) communication system comprises the following several steps. A BS(Base Station) receives resource selection information from a user terminal(411). The BS selects Ns units among Nc units of sub carriers corresponding to the received resource selection information, and maps the Ns units of the sub carriers with data symbols(413). The BS multiplies the Ns units of the sub carriers, mapped with the data symbols, by corresponding weighting factors and performs a beam forming process(415). The BS performs an Nc-Point IFFT(Inverse Fast Fourier Transform) operation for the signals resulted from the beam forming process(417). The BS performs a serial conversion process for the signals resulted from the Nc-point IFFT operation(419). The BS inserts a protection section into the signals resulted from the serial conversion process(421). The BS transmits the signals, where the protection section is inserted, to the user terminal(423).