发明授权
- 专利标题: Weight prediction for closed-loop mode transmit diversity
- 专利标题(中): 闭环模式发射分集的权重预测
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申请号: US10364638申请日: 2003-02-10
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公开(公告)号: US07155177B2公开(公告)日: 2006-12-26
- 发明人: Jittra Jootar , Da-shan Shiu , Parvathanathan Subrahmanya
- 申请人: Jittra Jootar , Da-shan Shiu , Parvathanathan Subrahmanya
- 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 Philip R. Wadsworth; Charles D. Brown; George C. Pappas
- 主分类号: H04B1/02
- IPC分类号: H04B1/02 ; H04B17/00 ; H04B1/10
摘要:
Techniques for predicting weights used for closed-loop transmit diversity. In a channel prediction scheme, channel gains for multiple transmit antennas are initially estimated (e.g., based on pilots received from these antennas) and used to derive predicted channel gains for a future time instant. The predicted channel gains are then used to derive predicted weights that are deemed to be “optimal” at the future time instant. Optimality may be determined based on one or more criteria, such as maximizing a received SNR for the received signals. In a weight prediction scheme, the channel gains for the multiple antennas are estimated and used to compute optimal weights for the current time instant. The current optimal weights are then used to predict the optimal weights at the future time instant. For both schemes, the prediction may be performed based on an adaptive filter (e.g., LMS or RLS filter) or a non-adaptive filter.
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