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专利名称：Robust scalable and adaptive frequency
estimation and frequency tracking forwireless systems
发明人：Zhu Ji,Johnson O. Sebeni,Yu-Lin Wang申请号：US14058155申请日：20131018公开号：US092278B2公开日：20160216
专利附图：
摘要：Methods and apparatuses to determine a frequency adjustment in a mobilewireless device are disclosed. A method includes determining a coarse frequency error
estimate and multiple fine frequency error estimates; selecting at least one candidatefine frequency error estimate having a frequency value closest to a correspondingfrequency value for the coarse frequency error estimate; and determining a frequencyadjustment based on a combination of the coarse frequency error estimate and theselected at least one candidate fine frequency error estimate. In an embodiment, themethod further includes calculating a confidence metric for the coarse frequency errorestimate; when the confidence metric exceeds a threshold value, determining thefrequency adjustment based on the candidate fine frequency error estimate; otherwise,determining the frequency adjustment based on a fine frequency error estimate in theplurality of fine frequency error estimates closest to a most recent previous finefrequency error estimate.
申请人：Apple Inc.
地址：Cupertino CA US
国籍：US
代理机构：Downey Brand LLP
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