| 摘要 |
A demodulation method and a demodulator for an Orthogonal Frequency Division Multiplexing (OFDM) - Multiple Input Multiple Output (MIMO) system are provided. At first, using a received reference signal, the channel estimation values on the sub-carrier of the reference signal on each channel are estimated; using the channel estimation values on the sub-carrier of the reference signal on each channel, an equalization matrix on the sub-carriers of the reference signals; using the obtained equalization matrix, an interpolation calculation is carried out, and equalization matrixes on all data sub-carriers are obtained; using all the data signals received from all data sub-carriers and corresponding equalization matrixes, an intermediary estimation value of the transmitted data is calculated; using a precoding matrix, the intermediary estimation value of the transmitted data is de-precoded, and a final estimation value of transmitted data is obtained. The demodulator comprises an OFDM demodulation module, a frame parsing module, a precoding matrix generation module, a partial channel estimation module, a partial equalization matrix generation module, an equalization matrix interpolation module, a MIMO demodulation module and a de-precoding module. The present invention can reduce the complexity of an OFDM-MIMO receiver. |
