Invention Grant
US08934595B2 Estimation of sample clock frequency offset based on error vector magnitude
有权
基于误差矢量幅度估计采样时钟频率偏移
- Patent Title: Estimation of sample clock frequency offset based on error vector magnitude
- Patent Title (中): 基于误差矢量幅度估计采样时钟频率偏移
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Application No.: US14156202Application Date: 2014-01-15
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Publication No.: US08934595B2Publication Date: 2015-01-13
- Inventor: I. Zakir Ahmed , Krishna Bharadwaj , Ramesh Krishnan , Vijaya Yajnanarayana
- Applicant: National Instruments Corporation
- Applicant Address: US TX Austin
- Assignee: National Instruments Corporation
- Current Assignee: National Instruments Corporation
- Current Assignee Address: US TX Austin
- Agency: Meyertons Hood Kivlin Kowert & Goetzel, P.C.
- Agent Jeffrey C. Hood; Mark K. Brightwell
- Main IPC: H04L7/033
- IPC: H04L7/033 ; H04L7/00 ; H03M1/12

Abstract:
A low complexity system and method for operating a receiver in order to estimate an offset between the actual sample clock rate 1/TS′ of a receiver and an intended sample clock rate 1/TS. The receiver captures samples of a received baseband signal at the rate 1/TS′, operates on the captured samples to generate an estimate for the clock rate offset, and fractionally resamples the captured samples using the clock rate offset. The resampled data represents an estimate of baseband symbols transmitted by the transmitter. The action of operating on the captured samples involves computing an error vector signal and then estimating the clock rate offset using the error vector signal. The error vector signal may be computed in different ways depending on whether or not carrier frequency offset and carrier phase offset are assumed to be present in the received baseband signal.
Public/Granted literature
- US20140126676A1 Estimation of Sample Clock Frequency Offset Based on Error Vector Magnitude Public/Granted day:2014-05-08
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