论文信息 - Improved joint carrier and sampling frequency offset estimation scheme for OFDM systems

Improved joint carrier and sampling frequency offset estimation scheme for OFDM systems

We present an improved joint carrier and sampling frequency offset estimation (JCSFOE) scheme for OFDM systems. With adaptive weighted carrier frequency offset estimation and compensation, this improved JCSFOE scheme reduces the sensitivity of sampling frequency offset estimation to the intercarrier interference (ICI) caused by carrier frequency offset. Moreover, by carefully combining estimates from several OFDM preambles, more accurate sampling frequency offset estimation is achieved. Effects of sampling frequency offset and frequency selective fading on the improved JCSFOE scheme are analyzed. Simulation results show that the proposed scheme significantly improves the system performance compared with existing methods.

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