Patent ID: 8654667
Filing Date: 2014-02-18
Classification: H04B,H04L

Abstract:
1. A method for demodulating data based on a downlink transmit diversity mode in a LTE system, comprising: performing channel estimation on a downlink channel by using a cell reference signal, so as to obtain channel estimation values; dividing received data from sub-carriers of each receiving antenna based on a transmit diversity mode into multiple groups of received data according to numbers of antennas of a transmitter and a receiver; performing an independent demodulation on each group of the multiple groups of received data separately according to a demodulation algorithm of two-port transmitting and single-port receiving, so as to obtain a corresponding group of demodulated data; and for multiple groups of demodulated data corresponding to same transmitted data, performing a maximum ratio combination on the multiple groups of demodulated data according to a channel condition corresponding to each group of the multiple groups of demodulated data, so as to obtain a final demodulated data value corresponding to the same transmitted data; wherein the step of dividing the received data from sub-carriers of each receiving antenna based on the transmit diversity mode into the multiple groups of received data comprises: classifying the data into K groups by classifying data from two neighboring sub-carriers of a same receiving antenna into one group, wherein and N and M represent the numbers of the antenna of the transmitter and the receiver respectively.