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  • 學位論文

用於無線通訊之8x8多輸入多輸出解碼器之設計

Design of An 8x8 MIMO Detector for Wireless Communications

指導教授 : 黃元豪

摘要


隨著無線通訊資料傳輸速率需求增高,在傳送端與接收端置放多個天線並使用空間多工 (Spatial multiplexing)是其中一種可以在既定的頻譜範圍內達到此種要求的方法。隨著傳輸容量需求大增,利用增加更多天線數來提高傳輸容量已是趨勢。 由於高維度多入多輸出系統 (MIMO)的要求增加,排序正交三角分解 (sorted-QR decomposition)前置處理在多輸入多輸出偵測法(QR-based MIMO detection)變成一個計算瓶頸,且MIMO detector的功率消耗與計算複雜度呈現巨幅成長。本論文提出的8x8 MIMO detector可分成兩部份。第一部分提出的Givens-Rotation based演算法利用提早停止排列運算機制和放寬執行排序需要成立的條件,進而改善parallel sorted-QR decomposition的吞吐量以及硬體使用效率。偵測效益下降小到可忽略,且在較大天線數時能達到更好的硬體使用效率。第二部分我們提出 8x8 mixed K-best/QR-SIC MIMO detector利用提出的 modified sorted-QR分解做為前置處理。modified sorted-QR利用放寬執行排序需要成立的條件改善運算時間以及硬體使用效率。相對於K-best detector,在高維度 MIMO detection時,我們提出的 mixed K-best/QR-SIC能夠達到更低的計算複雜度而且幾乎沒有偵測效益的損失。

並列摘要


Due to the growing demands of high-dimension multiple-input multiple-output (MIMO) systems, the preprocessing of sorted-QR decomposition becomes one of the computational bottlenecks in the QR-based MIMO detection, and the power consumption and computation complexity of the MIMO detector are growing dramatically. This thesis proposes an 8 × 8 MIMO detector which can be divided into two parts. First, the proposed Givens-Rotation-based algorithm aims to improve the throughput and the hardware utilization efficiency by stopping the sorting operations earlier or relaxing the sorting condition for the parallel sorted-QR decomposition. The detection performance degradation is negligible and better hardware efficiency can be obtained for the larger number of the MIMO antennas. Then, we propose an 8 × 8 mixed K-best/QR-SIC detector with the proposed modified sorted-QR decomposition as the preprocessing. The modified sorted-QR decomposition is used to relax the sorting condition to improve the latency and the hardware utilization rate. Compared to the K-best detector, the proposed mixed K-best/QR-SIC detector can achieve lower computation complexity with almost no performance loss in the high-dimension MIMO detection.

參考文獻


[1] IEEE std 802.16e, “Standard for Local and Metropolitan area networks”, Feb. 2006.
May, 2006.
[3] Q. Li and Z. Wang, “Improved K-Best Sphere Decoding Algorithms for MIMO
pp. 1159–1162.
using the Sorted QR Decomposition based on Log-Likelihood Ratio in V-Blast

被引用紀錄


劉曉恬(2014)。家屬照顧者運用安寧療護經驗探討〔碩士論文,朝陽科技大學〕。華藝線上圖書館。https://www.airitilibrary.com/Article/Detail?DocID=U0078-2502201617123144

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