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arXiv 2104.00191eess.SP
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全双工mmWave大规模多输入多输出系统:一种联合混合预编码/合并和自干扰消除的设计

Full-Duplex mmWave Massive MIMO Systems: A Joint Hybrid Precoding/Combining and Self-Interference Cancellation Design

Asil Koc, Tho Le-Ngoc

摘要:

毫米波(mmWave)大规模多输入多输出(MIMO)系统已经被认为是第五代(5G)和5G之后的无线通信网络的主要候选之一,以满足不断增长的容量需求。全双工技术可以进一步增强毫米波大规模多输入多输出系统的优势。然而,强自干扰(SI)是全双工技术的主要限制因素。因此,本文提出了一种新的基于角度的联合混合预编码/合并(AB-JHPC)技术,用于全双工毫米波MIMO系统。我们的主要目标是:(i)提高自干扰消除(SIC),(ii)增加预期的信号功率,(iii)减少信道估计开销,(iv)设计具有少量RF链的大规模多输入多输出系统。首先,AB-JHPC的RF级通过慢时变的离开角(AoD)和到达角(AoA)信息来开发。提出了一种联合发射/接收RF波束形成器设计,用于覆盖(不包括)预期(SI)信道的AoD/AoA支持。其次,AB-JHPC的BB级是通过减小尺寸的有效预期通道构造的。在BB阶段使用众所周知的奇异值分解(SVD)方法之后,我们还提出了一种新的半盲最小均方误差(S-MMSE)技术,通过使用AoD/AoA参数来进一步抑制剩余SI功率。数值结果表明,该方法能有效地消除SI信号。结果表明,AB-JHPC达到85.7 dB SIC和SIC的总量几乎线性增加,通过天线隔离技术。我们观察到,所提出的全双工毫米波大规模多输入多输出系统与其半双工对应物相比,随着天线阵列尺寸的增加和发射/接收天线隔离度的提高,可实现的速率容量加倍。

英文摘要:

Millimeter-wave (mmWave) massive multiple-input multiple-output (MIMO) systems have been considered as one of the primary candidates for the fifth generation (5G) and beyond 5G wireless communication networks to satisfy the ever-increasing capacity demands. Full-duplex technology can further enhance the advantages of mmWave massive MIMO systems. However, strong self-interference (SI) is the major limiting factor in full-duplex technology. Hence, this paper proposes a novel angular-based joint hybrid precoding/combining (AB-JHPC) technique for the full-duplex mmWave massive-MIMO systems. Our primary goals are listed as: (i) improving the self-interference cancellation (SIC), (ii) increasing the intended signal power, (iii) decreasing the channel estimation overhead, (iv) designing the massive MIMO systems with a low number of RF chains. First, the RF-stage of AB-JHPC is developed via slow time-varying angle-of-departure (AoD) and angle-of-arrival (AoA) information. A joint transmit/receive RF beamformer design is proposed for covering (excluding) the AoD/AoA support of intended (SI) channel. Second, the BB-stage of AB-JHPC is constructed via the reduced-size effective intended channel. After using the well-known singular value decomposition(SVD) approach at the BB-stage, we also propose a new semi-blind minimum mean square error (S-MMSE) technique to further suppress the residual SI power by using AoD/AoA parameters. The numerical results demonstrate that the SI signal is remarkably canceled via the proposed AB-JHPC technique. It is shown that AB-JHPC achieves 85.7 dB SIC and the total amount of SIC almost linearly increases via antenna isolation techniques. We observe that the proposed full-duplex mmWave massive MIMO systems double the achievable rate capacity compared to its half-duplex counterpart as the antenna array size increases and the transmit/receive antenna isolation improves.

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