Invention Grant
- Patent Title: User equipment reference signal-based timing estimation
- Patent Title (中): 用户设备参考信号定时估计
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Application No.: US13678332Application Date: 2012-11-15
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Publication No.: US09014114B2Publication Date: 2015-04-21
- Inventor: Yi Huang , Tao Luo , Taesang Yoo , Xiliang Luo
- Applicant: QUALCOMM Incorporated
- Applicant Address: US CA San Diego
- Assignee: QUALCOMM Incorporated
- Current Assignee: QUALCOMM Incorporated
- Current Assignee Address: US CA San Diego
- Agency: Norton Rose Fulbright US LLP
- Main IPC: H04W4/00
- IPC: H04W4/00 ; H04L12/66 ; H04W72/00 ; H04W72/04 ; H04L27/26 ; H04L5/00

Abstract:
Estimation of timing errors is disclosed that uses user equipment reference signals (UERSs). A UE models each channel in a user equipment reference signal (UERS) as a channel on an adjacent UERS tone multiplied by a phase ramping term. This phase ramping term is determined using an estimator on the modeled channels. The UE then determines the equivalent timing error by mapping the phase ramping terms into the estimated timing errors in the time domain. In coordinated multipoint (CoMP) systems, the UERS-based timing error may be used to identify an aligned common reference signal (CRS) associated with the network entity transmitting the data. With this determination, the UE may estimate a CRS-based timing error and either substitute the CRS-based timing error for the UERS-based timing error or calculate a further average timing error based on both the CRS-based and UERS-based timing errors.
Public/Granted literature
- US20130156013A1 USER EQUIPMENT REFERENCE SIGNAL-BASED TIMING ESTIMATION Public/Granted day:2013-06-20
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