What is the meaning of multi-resolution beamforming codebook in hybrid precoding and how can I design it in mmWave?
If you consider the hybrid precoding in mmWave, the precoding includes digital and analog precoding. I am not sure which kind of precoding that you are talking about.
Actually, beamforming codebook is the set of beams, and each beam is considered as one direction of the spatial range. In conventional antenna structure, the codebook is regarded as the digital precoding, and analog beams are always fixed to cover the cell. So usually, we talk the resolution as "high resolution" or "low resolution" with the different antenna set.
Here,if you consider the multi-resolution, I think it is the joint design of digital and analog beams. Both of them could make the coopearation optimization, and make
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