Invention Grant
US08767855B2 Method of estimating sampling clock offset, a sampling clock offset estimator and a receiver comprising the same
有权
估计采样时钟偏移的方法，采样时钟偏移估计器和包含该取样时钟偏移估计器的接收机
- Patent Title: Method of estimating sampling clock offset, a sampling clock offset estimator and a receiver comprising the same
- Patent Title (中): 估计采样时钟偏移的方法，采样时钟偏移估计器和包含该取样时钟偏移估计器的接收机
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Application No.: US13856970Application Date: 2013-04-04
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Publication No.: US08767855B2Publication Date: 2014-07-01
- Inventor: Rui Zhang , Hung C. Nguyen
- Applicant: Greenvity Communications, Inc.
- Applicant Address: US CA Milpitas
- Assignee: Greenvity Communications, Inc.
- Current Assignee: Greenvity Communications, Inc.
- Current Assignee Address: US CA Milpitas
- Agency: Perkins Coie LLP
- Agent Aaron Wininger
- Main IPC: H04L5/12
- IPC: H04L5/12 ; H04L27/34
Abstract:
A SCO estimator comprises the following units. A module obtains a first data output by a first unit and copies the first data to obtain copied data. A QAM unit quadrature modulates the copied data into each sub-carrier of each OFDM symbol to regenerate transmitted modulated data. A first phase unit obtains a first phase of each sub-carrier of each OFDM symbol of the modulated data. A second phase unit obtains a second data from a second unit, and obtains a second phase of each sub-carrier of each OFDM symbol of the second data. A comparator generates a comparing result according to the first phase and the second phase of each sub-carrier of each OFDM symbol. A divider divides the comparing result of each sub-carrier by the subcarrier index within each OFDM symbol and the OFDM symbol index of each OFDM symbol. An averaging unit averages the divided comparing result over number of sub-carriers and number of OFDM symbols.
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