2015 IEEE Global Communications Conference (GLOBECOM) 2014
DOI: 10.1109/glocom.2014.7417848
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Multi-Resolution Codebook Based Beamforming Sequence Design in Millimeter-Wave Systems

Abstract: There is growing interest in using millimeter wave (mmWave) communication for fifth generation (5G) wireless systems because of the large bandwidth available in these frequencies. To overcome the higher path loss at mmWave bands, highly directional beamforming using large-scale, or massive, multiple-input multiple-output (MIMO) systems is critical. In this scenario, the problem of channel estimation becomes challenging due to the substantial training overhead needed to sound all possible beam directions using … Show more

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Cited by 4 publications
(2 citation statements)
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References 21 publications
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“…In Xiao et al, 21 the design of a hierarchical codebook for hybrid architecture is proposed by taking into account the per‐antenna power constraint. The design of the beams in Xiao et al 21 is based on the phase‐shifted discrete Fourier transform (PS‐DFT) proposed in Noh et al 22 and design only RF codewords because the phases of digital codewords have been absorbed into those of RF codewords. As mentioned above, in a hybrid architecture, the digital precoder needs to be jointly designed with the analog precoder.…”
Section: Introductionmentioning
confidence: 99%
“…In Xiao et al, 21 the design of a hierarchical codebook for hybrid architecture is proposed by taking into account the per‐antenna power constraint. The design of the beams in Xiao et al 21 is based on the phase‐shifted discrete Fourier transform (PS‐DFT) proposed in Noh et al 22 and design only RF codewords because the phases of digital codewords have been absorbed into those of RF codewords. As mentioned above, in a hybrid architecture, the digital precoder needs to be jointly designed with the analog precoder.…”
Section: Introductionmentioning
confidence: 99%
“…For example, in typical dense urban cells, a 3D hierarchical codebook can be used while in sub-urban environment, a 2D horizontal hierarchical codebook of beams is more appropriate. More references on hierarchical beamforming can be found in [11] which also describes how to design the hierarchical codebook using the Discrete Fourier Transform (DFT) matrix.…”
Section: Introductionmentioning
confidence: 99%