发明授权
US07529179B1 Joint maximum likelihood estimation of integer carrier frequency offset and channel in OFDM systems 有权
OFDM系统中整数载波频偏和信道的联合最大似然估计

Joint maximum likelihood estimation of integer carrier frequency offset and channel in OFDM systems
摘要:
An Orthogonal Frequency Division Multiplexing (OFDM) receiver is provided that receives a modulated OFDM signal through a channel. The OFDM receiver includes an RF downconverter that generates a downconverted modulated OFDM signal based on the modulated OFDM signal, an analog-to-digital converter (ADC) that generates digitized OFDM symbols based on the downconverted modulated OFDM signal, a carrier-phase correction module that generates time-domain symbols based on the digitized OFDM symbols, a fast Fourier transform (FFT) module that generates frequency-domain symbols based on the time-domain symbols, and an estimator module that receives the frequency-domain symbols and determines an integer carrier frequency offset (CFO) estimate and a channel estimate and that generates respective integer CFO estimate and channel estimate signals.
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