Invention Grant
US07457366B2 System and method for adaptive phase compensation of OFDM signals
失效
OFDM信号自适应相位补偿的系统和方法
- Patent Title: System and method for adaptive phase compensation of OFDM signals
- Patent Title (中): OFDM信号自适应相位补偿的系统和方法
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Application No.: US10675215Application Date: 2003-09-30
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Publication No.: US07457366B2Publication Date: 2008-11-25
- Inventor: Alexander A. Maltsev , Alexey E. Rubtsov , Alexei M. Soupikov
- Applicant: Alexander A. Maltsev , Alexey E. Rubtsov , Alexei M. Soupikov
- Applicant Address: US CA Santa Clara
- Assignee: Intel Corporation
- Current Assignee: Intel Corporation
- Current Assignee Address: US CA Santa Clara
- Agency: Schwegman, Lundberg & Woessner, P.A.
- Agent Gregory J. Gorrie
- Main IPC: H04K1/10
- IPC: H04K1/10

Abstract:
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.
Public/Granted literature
- US20040190637A1 System and method for adaptive phase compensation of OFDM signals Public/Granted day:2004-09-30
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