| CPC H04B 7/046 (2013.01) [H04B 17/3913 (2015.01); H04L 5/0048 (2013.01); H04L 25/0254 (2013.01)] | 20 Claims |
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1. A method of a wireless communication device, the method comprising:
receiving a reference signal from a base station;
estimating a first channel between the wireless communication device and the base station based on the reference signal;
extracting, based on a first artificial intelligence model trained to reduce a difference between the first channel estimated by the wireless communication device and a second channel estimated by the base station, a feature including grouped attributes from the estimated first channel;
quantizing the grouped attributes using a codebook that is based on a second artificial intelligence model by generating one or more indices of the codebook for each group of the attributes; and
transmitting, to the base station, a bitstream including combination information of the indices of the codebook,
wherein the codebook includes a plurality of vector codewords and a plurality of scalar codewords, and the second artificial intelligence model comprises an artificial intelligence model trained to reduce a difference between a combination of the plurality of vector codewords and the plurality of scalar codewords of the codebook and the quantized attributes.
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