Downlink channel reconstruction method and apparatus

A downlink channel reconstruction apparatus, comprising

• a processor;
• and
• a non-transitory computer-readable storage medium coupled to the processor and storing programming instructions for execution by the processor, the programming instructions instruct the processor to:
• generate a pilot weighting codebook, wherein the pilot weighting codebook comprises multiple different weighting matrices;
• multiply the multiple different weighting matrices by pilot signals to obtain multiple different weighted pilot signals;
• send the multiple different weighted pilot signals to a terminal;
• receive multiple different optimal code words returned by the terminal, wherein each of the optimal code words is obtained based on a channel estimation of a weighted pilot signal;
• and
• reconstruct a downlink channel according to the multiple different optimal code words.

A non-transitory machine-readable medium having instructions stored therein, which when executed by one or more processors, cause the one or more processors to perform operations, the operations comprising:

• generating a pilot weighting codebook, wherein the pilot weighting codebook comprises multiple different weighting matrices;
• multiplying the multiple different weighting matrices by pilot signals to obtain multiple different weighted pilot signals;
• sending, by a base station, the multiple different weighted pilot signals to a terminal;
• receiving, by the base station, multiple different optimal code words returned by the terminal, wherein each of the optimal code words is obtained based on a channel estimation of a weighted pilot signal;
• and
• reconstructing, by the base station, a downlink channel according to the multiple different optimal code words.