发明授权
US07457366B2 System and method for adaptive phase compensation of OFDM signals
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OFDM信号自适应相位补偿的系统和方法
- 专利标题: System and method for adaptive phase compensation of OFDM signals
- 专利标题(中): OFDM信号自适应相位补偿的系统和方法
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申请号: US10675215申请日: 2003-09-30
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公开(公告)号: US07457366B2公开(公告)日: 2008-11-25
- 发明人: Alexander A. Maltsev , Alexey E. Rubtsov , Alexei M. Soupikov
- 申请人: Alexander A. Maltsev , Alexey E. Rubtsov , Alexei M. Soupikov
- 申请人地址: US CA Santa Clara
- 专利权人: Intel Corporation
- 当前专利权人: Intel Corporation
- 当前专利权人地址: US CA Santa Clara
- 代理机构: Schwegman, Lundberg & Woessner, P.A.
- 代理商 Gregory J. Gorrie
- 主分类号: H04K1/10
- IPC分类号: H04K1/10
摘要:
An OFDM receiver applies phase compensation to subcarriers of data symbols of an OFDM packet. A phase compensation estimate is generated from pilot subcarriers within the data symbol and applied to the subcarriers of the data symbol prior to demapping. The pilot subcarriers of the data symbol are combined and weighted to generate an observation vector. Recursive filtering is performed on the observation vector to generate the phase compensation estimate. The recursive filtering may include performing an extended Kalman-type filtering (EKF) operation on the observation vector using a channel estimate, an additive noise power estimate, a signal to noise ratio (SNR) estimate and a priori information about a dynamic model of the phase noise spectrum of transceiver oscillators. The channel estimate may be generated from a long training symbol of the OFDM packet, and the additive noise power estimate and the SNR estimate may be generated from short training symbols of the OFDM packet.
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