Invention Grant
US07974364B2 Doppler frequency estimation and adaptation for mobile multimedia multicast systems
有权
用于移动多媒体多播系统的多普勒频率估计和适应
- Patent Title: Doppler frequency estimation and adaptation for mobile multimedia multicast systems
- Patent Title (中): 用于移动多媒体多播系统的多普勒频率估计和适应
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Application No.: US12110688Application Date: 2008-04-28
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Publication No.: US07974364B2Publication Date: 2011-07-05
- Inventor: Nabil Yousef
- Applicant: Nabil Yousef
- Applicant Address: US CA Lake Forest
- Assignee: Newport Media, Inc.
- Current Assignee: Newport Media, Inc.
- Current Assignee Address: US CA Lake Forest
- Agency: Rahman LLC
- Main IPC: H04L27/00
- IPC: H04L27/00

Abstract:
A technique for Doppler frequency estimation and adaptation in a MediaFLO™ (Forward Link Only) receiver system includes receiving Orthogonal Frequency Division Multiplexing (OFDM) symbols in the receiver, dividing a Doppler frequency range into N ranges corresponding to N interpolation filters; determining a correlation between two OFDM symbols separated by time; estimating a Doppler frequency by the correlation of OFDM symbols; determining a ratio of the correlation of OFDM symbols; comparing the determined ratio of the correlation of OFDM symbols with a look up table of α stored at a receiver to determine a corresponding Doppler frequency; mapping α ranges stored at the look up table to suitable interpolation filters; estimating an interpolation filter from the mapped α ranges mapped against determined α ratio; adapting Time Domain Interpolation (TDI) to the selected interpolation filter; and synchronizing receiver to the TDI filter.
Public/Granted literature
- US20090323790A1 Doppler Frequency Estimation and Adaptation for MediaFLO Systems Public/Granted day:2009-12-31
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