雙向放大轉送多輸入多輸出中繼系統之中繼點預編碼器選擇方法

專利類型

發明

專利國別 (專利申請國家)

中華民國

專利申請案號

105111204

專利證號

I 605693

專利獲證名稱

雙向放大轉送多輸入多輸出中繼系統之中繼點預編碼器選擇方法

專利所屬機關 (申請機關)

國立清華大學

獲證日期

2017/11/11

技術說明

本發明提供一種雙向放大轉送多輸入多輸出（MIMO）中繼系統之中繼點預編碼器選擇方法及使用該選擇方法或所選中繼點預編碼器之通訊裝置。所述之選擇方法係根據中繼點預編碼器與有效MIMO通道奇異值之間的關聯性，建構一基於串接MIMO通道之奇異向量子空間的候選中繼點預編碼器集合，然後從中選擇一預編碼器以符合所採用的設計準則，例如：最小均方誤差總和、最大通道容量總和、最小或最大條件數總和等，其中條件數定義為一MIMO通道之最大與最小奇異值比。相較於具有最佳效能之迭代演算法，本發明可達到類似效能但具有明顯較低的運算複雜度。 This invention provides a relay precoder selection method for two-way amplify-and-forward multiple-input multiple-output (MIMO) relay systems and communication devices using the selection method or the selected relay precoder. According to the relationship between a relay precoder and the singular values of the effective MIMO channels, a set of candidate relay precoders are constructed based on the singular vector subspaces of cascaded MIMO channels, and one of them is selected for meeting a specific design criterion, such as the minimum sum of MSEs, the maximum sum of capacities, and the minimum or maximum sum of condition numbers, where the condition number is defined as the ratio of the largest to the smallest singular value of a MIMO channel. As compared with the iterative design methods with the optimum performance, this invention achieves close performance while requiring much lower computational complexity.

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