发明名称 |
System and Method for Early Termination in Iterative Null-Space Directed Singular Value Decomposition for MIMO |
摘要 |
Embodiments are provided for early termination of an iterative process of determining channel directions and transmissions in multi-user multiple-input and multiple-output (MU-MIMO) communications systems. In an embodiment, a base station or a user equipment (UE) calculates a multi-user channel matrix using a first iteration of a null-space singular value decomposition (SVD) based iterative zero-forcing (I-ZF) algorithm for multi-user MU-MIMO. The base station or UE repeats updating the multi-user channel matrix using a next iteration of the algorithm and the multi-user channel matrix calculated in a previous iteration, until the diagonal elements of the multi-user channel matrix are greater than the off-diagonal elements by a predefined threshold. Upon determining that the diagonal elements are greater than the off-diagonal elements by the predefined threshold, a plurality of transmission signals are calculated using the last updated multi-user channel matrix. |
申请公布号 |
US2015215009(A1) |
申请公布日期 |
2015.07.30 |
申请号 |
US201414163494 |
申请日期 |
2014.01.24 |
申请人 |
FutureWei Technologies, Inc. |
发明人 |
Jia Ming;Ma Jianglei;Zhu Peiying |
分类号 |
H04B7/04;H04L25/03 |
主分类号 |
H04B7/04 |
代理机构 |
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代理人 |
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主权项 |
1. A method by a network component for early termination of an iterative process of determining channel directions and transmissions for multi-user multiple-input and multiple-output (MIMO), the method comprising:
calculating a multi-user channel matrix using a first iteration of a null-space singular value decomposition (SVD) based iterative zero-forcing (I-ZF) algorithm for multi-user MIMO (MU-MIMO), wherein the multi-user channel matrix includes a plurality of diagonal elements corresponding to channels for multiple stations and a plurality of off-diagonal elements corresponding to inter-station interference; until the diagonal elements are greater than the off-diagonal elements by a predefined threshold, repeating updating the multi-user channel matrix using a next iteration of the null-space SVD based I-ZF algorithm and the multi-user channel matrix calculated in a previous iteration of the null-space SVD based I-ZF algorithm; and upon determining that the diagonal elements are greater than the off-diagonal elements by the predefined threshold, calculating a plurality of transmission signals using a last updated multi-user channel matrix. |
地址 |
Plano TX US |