Invention Grant
- Patent Title: Adaptive time-filtering for channel estimation in OFDM system
- Patent Title (中): OFDM系统中信道估计的自适应时间滤波
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Application No.: US12939118Application Date: 2010-11-03
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Publication No.: US08442160B2Publication Date: 2013-05-14
- Inventor: Linbo Li , Ashok Mantravadi , Fuyun Ling , Krishna Kiran Mukkavilli
- Applicant: Linbo Li , Ashok Mantravadi , Fuyun Ling , Krishna Kiran Mukkavilli
- Applicant Address: US CA San Diego
- Assignee: Qualcomm Incorporated
- Current Assignee: Qualcomm Incorporated
- Current Assignee Address: US CA San Diego
- Agency: Fulbright & Jaworski L.L.P.
- Main IPC: H04L27/06
- IPC: H04L27/06

Abstract:
Time filtering channel estimates in a wireless communication system, such as an Orthogonal Frequency Division Multiplex (OFDM) system, can be used to improve the quality of channel estimates. The characteristics of an optimal channel estimate time filter can depend on the manner in which the channel estimate is determined as well as the time correlation of channel estimates. A receiver can implement an adaptive time filter for channel estimates in which the time filter response can vary based on channel estimate parameters. The channel estimate parameters can include the manner of determining channel estimates, a time correlation of channel estimates, and an estimated Doppler frequency. The time filter response can be varied continuously over a range of responses or can be varied discretely over a predetermined number of time filter responses.
Public/Granted literature
- US20110051618A1 ADAPTIVE TIME-FILTERING FOR CHANNEL ESTIMATION IN OFDM SYSTEM Public/Granted day:2011-03-03
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