Invention Grant
- Patent Title: Multi-stage frequency offset estimation and compensation method and its circuit
- Patent Title (中): 多级频偏估计及补偿方法及其电路
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Application No.: US12697612Application Date: 2010-02-01
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Publication No.: US08194793B2Publication Date: 2012-06-05
- Inventor: Syang-Myau Hwang , Chun Chin Chen
- Applicant: Syang-Myau Hwang , Chun Chin Chen
- Applicant Address: TW Hsinchu
- Assignee: Uniband Electronic Corp.
- Current Assignee: Uniband Electronic Corp.
- Current Assignee Address: TW Hsinchu
- Agency: Muncy, Geissler, Olds & Lowe, PLLC
- Priority: TW98133853A 20091006
- Main IPC: H03D3/22
- IPC: H03D3/22 ; H04L27/22 ; H04L27/18 ; H03D3/00 ; H03K9/06

Abstract:
A multi-stage frequency offset (FO) estimation and compensation method and its circuit are described. The method includes performing at least a stage of primary-level FO estimation and compensation procedure, and a stage of advance-level FO estimation and compensation procedure. The first stage receives an input carrier signal of a larger FO and outputs a corrected carrier signal with an estimation error within the required estimation range of the next stage, to the next stage. Generated and fed forward stage-by-stage, the corrected carrier signal free of FO may be approached. Besides, since a feed-forward rather than a closed-loop approach is employed, the SNR requirement may be lower. Also, at primary-level, modulation may be first removed so the whole input carrier signal may be used to estimate FO; at advance-level, the periodic PN sequence in the input carrier signal may be utilized to estimate FO, thereby no dedicated training symbols are required.
Public/Granted literature
- US20110080978A1 MULTI-STAGE FREQUENCY OFFSET ESTIMATION AND COMPENSATION METHOD AND ITS CIRCUIT Public/Granted day:2011-04-07
Information query
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