Efficient fractional sampling clock offset compensation method for Q-band mmWave communication in fiber-to-the-room scenario

In the past two years, the Fiber-to-the-room (FTTR) solution has been widely deployed, which provides strong support for the usage of indoor Q-band mmWave communication. To reduce the peak-to-peak ratio (PAPR) requirements of RF components, single carrier (SC) modulation is adopted by Q-band mmWave communication. For SC communication, the fractional sampling clock offset influences link quality a lot. By inserting zero correlation zone (ZCZ) sequences between data symbols and doing equalization in frequency domain, the clock offset could be compensated at certain degree. To further improve the performance, a fractional sampling clock offset compensation method is proposed here and maximum 5.2dB gain of Signal-to-Ratio (SNR) is achieved.