On the Uplink Capacity of High Speed Railway Communications with Massive MIMO Systems

Liu, Ziyue; Wu, Jingxian; Fan, Pingzhi

doi:10.1109/vtcspring.2014.7023021

Cited by 17 publications

(21 citation statements)

References 10 publications

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“…According to these facts, we readily arrive at (20). It is observed that the autocorrelation in (20) is independent of the time index t. This completes the proof.…”

Section: Appendix a Proof Of Lemmasupporting

confidence: 58%

“…Note that there exists a constant coefficient between (20) and the accurate channel autocorrelation which will not affect the subsequent analysis. Since it is hard to get the close-form expression for the integrals in (20), we develop an effective approximation for (20). With a given beamforming angle θ, the beam pattern of the ULA determined by (19) is comprised of two parts: mainlobe and sidelobes, as shown in Fig.…”

Section: A Psd Analysis For the Equivalent Uplink Channelmentioning

confidence: 99%

“…3. Therefore, it is natural to divide the autocorrelation in (20) into the following two parts according to the range of the mainlobe and sidelobes…”

Section: A Psd Analysis For the Equivalent Uplink Channelmentioning

confidence: 99%

“…In a typical massive MIMO system, a large-scale antenna array is configured at the transmitter or receiver to provide many additional benefits such as high-spatial resolution and highspectral efficiency. Some works have already demonstrated the potential of massive MIMO to deal with high-mobility related challenges [20]- [22]. In [20], the large-scale antenna arrays are employed at both the BS and the train to maximize the uplink capacity in HSR communications.…”

Section: Introductionmentioning

confidence: 99%

“…Some works have already demonstrated the potential of massive MIMO to deal with high-mobility related challenges [20]- [22]. In [20], the large-scale antenna arrays are employed at both the BS and the train to maximize the uplink capacity in HSR communications. In [21], the massive MIMO beamforming schemes are presented with the location information for HSR transmissions.…”

Section: Introductionmentioning

confidence: 99%

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High-Mobility Wideband Massive MIMO Communications: Doppler Compensation, Analysis and Scaling Laws

Wei

Zhang

et al. 2019

IEEE Trans. Wireless Commun.

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In this paper, we apply angle-domain Doppler compensation for high-mobility wideband massive multi-input multioutput (MIMO) uplink transmission. The time-varying multipath channel is considered between high-speed terminal and static base station (BS), where multiple Doppler frequency offsets (DFOs) are associated with distinct angle of departures (AoDs). With the aid of the large-scale uniform linear array (ULA) at the transmitter, we design a beamforming network to generate multiple parallel beamforming branches, each transmitting signal pointing to one particular angle. Then, the transmitted signal in each branch will experience only one dominant DFO when passing over the time-varying channel, which can be easily compensated before transmission starts. We theoretically analyze the Doppler spread of the equivalent uplink channel after angledomain Doppler compensation, which takes into account both the mainlobe and sidelobes of the transmit beam in each branch. It is seen that the channel time-variation can be effectively suppressed if the number of transmit antennas is sufficiently large. Interestingly, the asymptotic scaling law of channel variation is obtained, which shows that the Doppler spread is proportional to the maximum DFO and decreases approximately as 1/ √ M (M is the number of transmit antennas) when M is sufficiently large. Numerical results are provided to corroborate the proposed scheme.

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“…According to these facts, we readily arrive at (20). It is observed that the autocorrelation in (20) is independent of the time index t. This completes the proof.…”

Section: Appendix a Proof Of Lemmasupporting

confidence: 58%

Section: A Psd Analysis For the Equivalent Uplink Channelmentioning

confidence: 99%

“…3. Therefore, it is natural to divide the autocorrelation in (20) into the following two parts according to the range of the mainlobe and sidelobes…”

Section: A Psd Analysis For the Equivalent Uplink Channelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

High-Mobility Wideband Massive MIMO Communications: Doppler Compensation, Analysis and Scaling Laws

Wei

Zhang

et al. 2019

IEEE Trans. Wireless Commun.

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Hybrid precoding design forMmWavemulti‐user massiveMIMOsystems under high mobility

Faragallah

El‐Sayed

El‐Mashed

2022

Trans Emerging Tel Tech

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Studying hybrid precoding in a high mobility scenario is challenging task. Because the channel changes quickly with time and becomes double selective fading in the spatial domain. As a result, there is a difficulty to achieve perfect channel state information or estimate the channel under high mobility. In this paper, an applicable hybrid precoding based on amplitude and phase excitation beams for millimeter wave (mmWave) massive multiple input multiple output (MIMO) systems is proposed under high speed railway. The proposed hybrid precoding uses the data from the locations of the mobile stations to build the amplitude and phase beam matrix. The proposed precoders and decoders are designed to maximize the mobile service. An optimization problem of mobile service maximization is formulated for designing hybrid precoders and decoders. To solve the optimization problem, a heuristic technique under power constraint is provided. The proposed hybrid precoding algorithm is compared with analog only beam steering algorithm, partially connected hybrid precoding algorithm and fully connected hybrid precoding algorithm. Results illustrated that the proposed precoding scheme outperforms the other precoding algorithms and handover success probability is enhanced under high mobility.

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Resource Management for High-Speed Railway Mobile Communications

Zhang

Zhu

et al. 2017

Advances in High-Speed Rail Technology

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On the Uplink Capacity of High Speed Railway Communications with Massive MIMO Systems

Cited by 17 publications

References 10 publications

High-Mobility Wideband Massive MIMO Communications: Doppler Compensation, Analysis and Scaling Laws

High-Mobility Wideband Massive MIMO Communications: Doppler Compensation, Analysis and Scaling Laws

Hybrid precoding design forMmWavemulti‐user massiveMIMOsystems under high mobility

Resource Management for High-Speed Railway Mobile Communications

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