Engineering Commons^™

Multi-Resolution Codebook And Adaptive Beamforming Sequence Design For Millimeter Wave Beam Alignment, Song Noh, Michael D. Zoltowski, David J. Love

Department of Electrical and Computer Engineering Technical Reports

Millimeter wave (mmWave) communication is expected to be widely deployed in fifth generation (5G) wireless networks due to the substantial bandwidth available at mmWave frequencies. To overcome the higher path loss observed at mmWave bands, most prior work focused on the design of directional beamforming using analog and/or hybrid beamforming techniques in largescale multiple-input multiple-output (MIMO) systems. Obtaining potential gains from highly directional beamforming in practical systems hinges on sufficient levels of channel estimation accuracy, where the problem of channel estimation becomes more challenging due to the substantial training overhead needed to sound all directions using a high-resolution narrow beam. …