RADIO RECEIVING DEVICE AND METHOD THEREOF

To provide a radio receiving device, method, program, radio unit (RU) and distributed unit (DU) that reduce a processing time for multiuser detection in the DU while reducing fronthaul bandwidth between the RU and DU.SOLUTION: A radio receiving device decomposes an estimated N'×M' channel...

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Bibliographic Details
Main Authors TAKAHASHI TAKUMI, DOI TAKANOBU, ISHII NAOTO, IHI SHINSUKE, MURAOKA KAZUSHI
Format Patent
LanguageEnglish
Japanese
Published 15.03.2023
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Summary:To provide a radio receiving device, method, program, radio unit (RU) and distributed unit (DU) that reduce a processing time for multiuser detection in the DU while reducing fronthaul bandwidth between the RU and DU.SOLUTION: A radio receiving device decomposes an estimated N'×M' channel matrix into N'×B' weight matrix W (B' is an integer equal to or less than N'-1 and equal to or more than M'), each column of which is orthogonal, and a B'×M' matrix containing two or more non-zero matrix elements in each column, generates the weight matrix W or generates a combination of an N'×B' sub-weight matrix W1 and at least one second sub-weight matrix, the product of which equals the weight matrix W, performs reception beamforming for received signals of N' receiving antennas using the weight matrix W or the sub-weight matrix W1, and executes BP algorithm using the signals after the reception beamforming.SELECTED DRAWING: Figure 4 【課題】Radio Unit(RU)とDistributed Unit(DU)の間のフロントホールの帯域を低減しつつ、DUでのマルチユーザ検出の処理時間を低減する無線受信装置、方法、プログラム、RU及びDUを提供する。【解決手段】無線受信装置は、推定されたN'×M'チャネル行列を、各列が直交するN'×B'ウェイト行列W(B'はN'-1以下M'以上の整数)と各列に2つ以上のゼロでない行列要素を含むB'×M'行列に分解し、ウェイト行列Wを生成するか又はそれらの積がウェイト行列Wに等しいN'×B'サブ・ウェイト行列W1と少なくとも1つの第2のサブ・ウェイト行列との組み合わせを生成し、ウェイト行列W又はサブ・ウェイト行列W1を用いてN'個の受信アンテナの受信信号に対する受信ビームフォーミングを行い、受信ビームフォーミング後の信号を用いて、BPアルゴリズムを実行する。【選択図】図4
Bibliography:Application Number: JP20210144215