Adaptive pre-encoding method and device for MIMO system based on codebook

Adaptive pre-encoding method and device for MIMO system based on codebook

  • CN 101,388,702 A
  • Filed: 07/01/2008
  • Published: 03/18/2009
  • Est. Priority Date: 09/11/2007
  • Status: Active Application
First Claim
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1. the method based on adaptive pre-encoding in the multi-input multi-output system of code book is characterized in that, comprises the steps:

  • Step 1 according to test the priori value that is obtained under different condition, obtains and sends corresponding handoff threshold value of spatial coherence or handoff threshold value list;

    Step 2, according to described handoff threshold value or handoff threshold value list and in conjunction with sending spatial coherence, select to carry out one or more in the following switching;

    Single user mode that carries out in conjunction with number of users information and the switching between the multi-user mode;

    Under multi-user mode, the switching between unitary matrice precoding mode and the zero-forcing beamforming precoding mode;

    Under zero-forcing beamforming precoding mode, the switching between discrete Fourier transform code book and the Jim Glassman code book;

    Under multi-user mode, big code book that carries out according to number of users information and the switching between the little code book.

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