Channel estimating method in MIMO-OFDM system
A MIMO-OFDM and channel estimation technology, applied in the field of wireless broadband communication, can solve the problems of low practical value, slow operation convergence speed, and large loss of spectral efficiency.
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[0088] A specific MIMO-OFDM configuration implemented in this patent is given below. The parameters in this example do not affect the generality of the invention.
[0089] The channel model adopts the semi-correlated fading channel model, according to the 3GPP SCM method (see literature [3rdGeneration Partnership Project; Technical Specification Group Radio Access Network; Spatial Channel Model for Multiple Input Multiple Output (MIMO) simulations.2003.www.3gpp.org]) produce. The center frequency is 2GHz, the signal bandwidth is 5MHz, the multipath component is 6, the number of OFDM subcarriers is 1024, and the transmitted information sequence (frequency domain information sequence) is a QPSK symbol encoded by space-time trellis code. The training sequence adopts the gold sequence.
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