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OFDM signal receiving apparatus and method for estimating common phase error of OFDM signals using data subcarriers
OFDM signal receiving apparatus and method for estimating common phase error of OFDM signals using data subcarriers
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机译:使用数据子载波估计OFDM信号的公共相位误差的OFDM信号接收装置和方法
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摘要
An Orthogonal Frequency Division Multiplexing (OFDM) signal receiving apparatus and method of estimating a common phase error (CPE) using data subcarriers (and pilot subcarriers) instead of only pilot subcarriers. In the OFDM signal receiver, a channel measurement unit estimates a channel from a fast-Fourier-transformed signal to generate information about good subcarrier indexes as channel state information (CSI). A Common Phase Error (CPE) estimation unit estimates good pilot subcarriers and good data subcarriers from an equalized signal output from an equalizer (EQ) based on the channel state information (CSI), calculates the first and second common phase errors from the estimated pilot and data subcarriers respectively, and combines the first and second common phase errors to generate a final common phase error.
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