Design a precoding codebook generator with an angular channel model using eigen beamforming

In this paper, we design a precoding codebook generator with an angular channel model using eigen beamforming. We consider a codebook generator which is constructed by an eigen beamforming with a channel state rotation matrix. The transmission signals are rotated by a real (θ) and a complex (φ) phase angle in the channel. Complex phase rotation (φ) depends on real phase angle (θ) and it has a free variable vector which is very easy to construct a beam in a precoding codebook generator. This paper inquires about a precoding codebook generator with an angular channel model which efficiently improves the transceiver beam structure and performance of bit error rate (BER).