Patent ID: 9577735
Date: 2017-02-21
CPC Classifications: H04B

Claim:
1. A method for transmitting one or more signals in a Multiple-Input Multiple-Output (MIMO) system including four antennas arranged as a first antenna set and a second antenna set, the method comprising: mapping data bits to data symbols; converting the data symbols into space-time signals; and transmitting reference signals and the space-time signals via the four antennas, wherein a number of the space-time signals transmitted at a specific orthogonal frequency divisional multiplexing (OFDM) symbol region in a subframe from the first antenna set is twice a number of the space-time signals transmitted at the specific OFDM symbol region in the subframe from the second antenna set, wherein the first antenna set and the second antenna set transmit the same number of the reference signals at the specific OFDM symbol region, wherein the specific OFDM symbol region is configured with 3 OFDM symbols from a first OFDM symbol of the subframe, wherein the first antenna set has two antennas of the four antennas and the second antenna set has the other two of the four antennas, and wherein the space-time signals are alternately transmitted through the first antenna set and the second antenna set in the specific OFDM symbol region of the subframe.