Method for carrying out channel information feedback by using double codebook and system thereof
A technology of channel information feedback and dual codebook, which is applied in the field of multiple input and multiple output in the field of wireless communication technology, and can solve problems such as inaccurate channel information feedback and inability to correspond
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[0048]Relevant research shows that, compared with the codebook scheme based on unitary matrix precoding in the prior art, the Grassmannian codebook scheme can achieve greater performance gain. However, Grassmannian precoding is a non-unitary matrix precoding and does not have a constant model characteristic.
[0049] Consider a M t root transmitting antenna, M r Point-to-point wireless communication system with root receiving antenna. The input signal is first multiplexed into M≤min(M t ,M r ) different sub-streams s, through the precoding matrix F p Perform preprocessing to obtain the actual transmitted signal, and the equivalent baseband signal expression at the receiving end is as follows:
[0050] y=HF p s+v (1)
[0051] Among them, H represents the channel matrix, v represents the noise vector, and the elements of the channel matrix obey the complex normal distribution CN(0, N 0 ), the covariance matrix of the noise vector is N 0 I M .
[0052] When the receivi...
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