應用於毫米波系統之均勻線性及平面式天線子連接架構研究;Sub-Connected Architectures for Uniform Linear and Planar Arrays in Millimeter Wave MIMO Systems

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Title:	應用於毫米波系統之均勻線性及平面式天線子連接架構研究;Sub-Connected Architectures for Uniform Linear and Planar Arrays in Millimeter Wave MIMO Systems
Authors:	張嘉華;ZHANG, JIA-HUA
Contributors:	通訊工程研究所
Keywords:	毫米波;混合式預編碼;薩利赫?巴倫蘇埃拉通道;多輸入多輸出;最大總和傳輸率;子連接架構;millimeter wave communication;hybrid precoding design;Saleh Valenzuela channel model;MIMO;achievable sum-rate;partially-connected
Date:	2017
Issue Date:	2019-07-17 10:47:50 (UTC+8)
Publisher:	通訊工程研究所
Abstract:	本文考慮在薩利赫?巴倫蘇埃拉(Saleh Valenzuela)通道模型情況下毫米波(millimeter wave, mmWave)多重輸入多重輸出(multiple-input multiple-output, MIMO)通訊系統之子連接(subarray)混合式預編碼器(hybrid analog/digital precoding)設計，討論以最大化總和傳輸率(achievable sum-rate maximization, ASR maximization)為準則之最佳化預編碼設計。因在毫米波系統下波長較短，可以在相同面積下擺放更多的天線陣列，而採用部分天線連接的方式，可以在傳輸效能與硬體成本之間取得一個平衡點，本文中主要是分析經過分配後的天線子集(subset)，進行重複(overlapped)、交錯(interlaced)及動態選擇預定義(dynamic pre-defined)之集合的連接架構，對於毫米波系統效能的影響，並且分別在均勻線性天線陣列(uniform linear array, ULA)與均勻方形平面天線陣列(uniform square planar array, USPA)下，研究各個子陣列(subarray)的架構對於總和傳輸率的效能分析，然後在平面式的陣列天線，還可以延伸出垂直(vertical)、水平(horizontal)以及方形(squared)的分配天線集合的方式。最後從模擬結果得出，由於動態選擇預定義是基於傳輸率最大化的標準去選擇固定式的子連接架構，從多個候選的固定子連接架構下，去選出因應當前隨機的通道表現最好的子連接架構，除了系統總合傳輸率可逼近全連接及全數位的效能外，也可以降低硬體上的複雜度。 Hybrid precoding design for an adaptive sub-connected structure offers a compromise between hardware complexity and spectral efficiency in massive multiple-input multiple-output (MIMO) systems at millimeter-wave (mmWave) frequencies. This paper focuses on the impacts of the partially antenna connections on the achievable sum-rate (ASR) performance for the uniform linear array (ULA) and uniform square planar array (USPA) configurations in mmWave networks. Due to the short wavelength in the millimeter-wave system, more antenna arrays can be assigned in the same area, and partially antenna connections offers a compromise between hardware complexity and system performance. The subarray architectures consist of the overlapped, interlaced, vertical, horizontal, squared and dynamically selective subset schemes in mmWave MIMO systems. Finally, simulation results demonstrate that a dynamic pre-defined set subarray architecture in conjunction is able to accomplish the ASR performance approaching the fully-connected architecture with an alleviated demand on hardware complexities.
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