发明授权
- 专利标题: Cyclic delay diversity and precoding for wireless communication
- 专利标题(中): 无线通信的循环延迟分集和预编码
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申请号: US12026360申请日: 2008-02-05
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公开(公告)号: US08780771B2公开(公告)日: 2014-07-15
- 发明人: Byoung-Hoon Kim , Durga Prasad Malladi , Xiaoxia Zhang , Taesang Yoo
- 申请人: Byoung-Hoon Kim , Durga Prasad Malladi , Xiaoxia Zhang , Taesang Yoo
- 申请人地址: US CA San Diego
- 专利权人: QUALCOMM Incorporated
- 当前专利权人: QUALCOMM Incorporated
- 当前专利权人地址: US CA San Diego
- 代理商 Peng Zhu
- 主分类号: H04B7/00
- IPC分类号: H04B7/00 ; H04B7/208 ; H04B7/02 ; H04L27/00 ; H04L1/00
摘要:
Techniques for sending a MIMO transmission using a combination of cyclic delay diversity and precoding are described. A set of delays (e.g., zero delay, small delay, and large delay) for cyclic delay diversity and a set of precoding matrices may be supported. In one design, a Node B may select a delay specifically for a UE or for a set of UEs served by the Node B. In another design, a UE may evaluate different combinations of precoding matrix and delay, determine the combination with the best performance, and send this combination of precoding matrix and delay to the Node B. The Node B may perform precoding with the precoding matrix and then processing for cyclic delay diversity based on the selected delay. Alternatively, the Node B may perform processing for cyclic delay diversity based on the selected delay and then precoding with the precoding matrix.