METHOD OF JOINT CLUSTERING AND PRECODING AND BASE STATION USING THE SAME

專利類型

發明

專利國別 (專利申請國家)

美國

專利申請案號

15/215,400

專利證號

US 10,045,350 B2

專利獲證名稱

METHOD OF JOINT CLUSTERING AND PRECODING AND BASE STATION USING THE SAME

專利所屬機關 (申請機關)

國立清華大學

獲證日期

2018/08/07

技術說明

本發明涉及一種聯合用戶分組與預編碼的方法以及使用所述方法的基地台，適合用於非正交多重接取（non-orthogonal multiple access，NOMA）系統。本發明之方法包括下列步驟：將四個用戶設備兩兩區分為第一群組與第二群組；在基地台端形成擬同時傳送之第一群組訊號與第二群組訊號；利用基地台與用戶設備之間的通道資訊建立分別對應於第一群組與第二群組的第一預編碼器集合和第二預編碼器集合；從第一預編碼器集合和第二預編碼器集合中分別選出第一預編碼器與第二預編碼器；利用第一與第二預編碼器分別對第一群組訊號與第二群組訊號進行預編碼；以及將二預編碼之結果疊加並廣播傳送至第一群組與第二群組。 A method of joint clustering and precoding and a base station using the same are provided. They are applicable to non-orthogonal multiple access (NOMA) systems. The method includes: dividing four user equipments into the first cluster and the second clusters, each consisting of two user equipments; forming the first-cluster’s signal and the second-cluster’s signal for simultaneous transmission at the base station; establishing the first precoding set and the second precoding set for the first cluster and the second cluster, respectively, by using channel information between the base station and all the user equipments; selecting the first precoder from the first precoding set and the second precoder from the second precoding set; using the first precoder and the second precoder to precode the first-cluster’s signal and the second-cluster’s signal; and superposing the two precoded signals and broadcasting the resulting signal to the first cluster and the second cluster.

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