Opportunistic beam training with hybrid analog/digital codebooks for mmWave systems

The millimeter wave (mmWave) frequency band offers substantial hitherto unused spectral resources for future wireless communication systems in order to meet the increasing capacity demand. However, mmWave frequencies suffer from high propagation losses, which may be mitigated by directional beamforming in addition to baseband precoding. This is usually referred to as hybrid beamforming. In this paper, we investigate the so-called discrete Fourier transform-mutually unbiased bases (DFT-MUB) aided codebook design conceived for limitedfeedback mmWave systems, where the MUB aided codebook is applied in the baseband, while the DFT codebook is invoked for RF analog phase shifters. We demonstrate that our DFT-MUB codebook design performs similarly to the optimal digital precoding matrix, where the precoder is selected as the right singular matrix of the channel. However, our solution significantly reduces the search complexity in the baseband, while performing within 2.5 dB from the optimal digital precoder.

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“…Given that Hadamard matrix A in (10) and by applying element-wise operation on A with vectors v 1 , v 2 , and v 3 , we arrive at…”

Section: B Baseband Codebook Design Using Mubsmentioning

confidence: 99%

“…In [9], Alkhateeb and Heath proposed RF codebook designs for limited feedback mmWave systems. By exploiting the channels' reciprocity, a heuristic codebook design was advocated by Eltayeb et al [10]. The efficiency of a practical communication system critically hinges on its performance vs complexity tradeoff.…”

Section: Introductionmentioning

confidence: 99%

Millimeter Wave Hybrid Beamforming with DFT-MUB Aided Precoder Codebook Design

Satyanarayana

El‐Hajjar

Kuo

et al. 2017

2017 IEEE 86th Vehicular Technology Conference (VTC-Fall)

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“…The mmWave literature has a few papers that propose techniques for finding the the best beam alignment between two nodes [33,30,26]. Unfortunately, we cannot use these schemes since they require the both nodes to transmit and/or receive signals, while MoVR can neither transmit nor receive; it can only reflect signals.…”

Section: How Does Movr Find the Correct Angles Of Incidence And Reflementioning

confidence: 99%

Cutting the Cord in Virtual Reality

Abari

Bharadia

Duffield

et al. 2016

Proceedings of the 15th ACM Workshop on Hot Topics in Networks

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Today's virtual reality (VR) headsets require a cable connection to a PC or game console. This cable significantly limits the player's mobility and hence her VR experience. The high data rate requirement of this link (multiple Gbps) precludes its replacement by WiFi. In this paper, we focus on using mmWave technology to deliver multi Gbps wireless communication between VR headsets and their game consoles. The challenge, however, is that mmWave signals can be easily blocked by the player's hand or head motion. We describe a novel system design and algorithms that allow mmWave links to sustain high data rates even in the presence of blockage, enabling a high-quality untethered VR experience.

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“…In [11], Alkhateeb et al proposed an RF codebook design for hybrid systems. A heuristic algorithm devised by exploiting channel's reciprocity was advocated by Eltayeb et al [12]. Considering the hardware complexity and system performance, Chen [13] proposed an iterative hybrid beamforming, where phase shifters can only supply discrete phase adjustments while maximizing the spectral efficiency.…”

Section: Introductionmentioning

confidence: 99%

Hybrid Beamforming Design for Full-Duplex Millimeter Wave Communication

Satyanarayana

El‐Hajjar

Kuo

et al. 2019

IEEE Trans. Veh. Technol.

135

106

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Harnessing the abundant availability of spectral resources at millimeter wave (mmWave) frequencies is an attractive solution to meet the escalating data rate demands. Additionally, it has been shown that full-duplex (FD) communication has the potential of doubling the bandwidth efficiency. However, the presence of significant residual self-interference (SI), which is especially more pronounced at mmWave frequencies because of the non-linearities in the hardware components, erodes the full potential of FD in practice. Conventionally, the residual SI is canceled in the baseband using digital processing with the aid of a transmit precoder. In this work, we propose a hybrid beamforming design for FD mmWave communications, where the SI is canceled by the joint design of beamformer weights at the radio-frequency (RF) and the precoder as well as combiner in the baseband. Our proposed design preserves the dimensions of the transmit signal, while suppressing the SI. We demonstrate that our joint design is capable of reducing the SI by upto 30 dB, hence performing similarly to the interference-free FD system while being computationally efficient. Our simulation results show that the proposed design significantly outperforms eigen-beamforming.

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Opportunistic beam training with hybrid analog/digital codebooks for mmWave systems

Cited by 41 publications

References 15 publications

Millimeter Wave Hybrid Beamforming with DFT-MUB Aided Precoder Codebook Design

Millimeter Wave Hybrid Beamforming with DFT-MUB Aided Precoder Codebook Design

Cutting the Cord in Virtual Reality

Hybrid Beamforming Design for Full-Duplex Millimeter Wave Communication

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