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Tracking reference signal design for phase noise compensation for SC-FDMA waveform

机译：用于SC-FDMA波形的相位噪声补偿的跟踪参考信号设计

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For 5G systems operating in the millimeter-wave range, the impact of the phase noise in oscillators can get higher than that in low band. In 3GPP TSG RAN1 Meeting# 86bis, agreement is achieved that the reference signal for phase tracking is supported for both 5G downlink and uplink. The preliminary design of tracking reference signal (TRS) for orthogonal frequency division multiplexing (OFDM) waveform has been done. But when the same method applies to single carrier frequency division multiple access (SC-FDMA) waveform, the peak-to-average power ratio (PAPR) of transmit signal gets huge growth. Therefore how to design the TRS for SC-FDMA waveform becomes one issue. In this paper, we propose some TRS patterns to track and compensate the phase noise based on SC-FDMA waveform, which fits for practical 5G system. The TRS and data can be mapped in a frequency division multiplexing (FDM) manner, similar as simultaneously physical uplink control channel (PUCCH) and physical uplink shared channel (PUSCH) transmission in LTE. Further the link level performance for different TRS design patterns and generation sequences are discussed, which indicate that using new patterns, the impact of phase noise can be effectively improved with little PAPR growth.
机译：对于在毫米波范围内运行的5G系统，振荡器中相位噪声的影响可能会高于低频带。在3GPP TSG RAN1 Meeting＃86bis中，达成协议，即5G下行链路和上行链路均支持用于相位跟踪的参考信号。已经完成了正交频分复用（OFDM）波形的跟踪参考信号（TRS）的初步设计。但是，当相同的方法应用于单载波频分多址（SC-FDMA）波形时，发射信号的峰均功率比（PAPR）会大幅增长。因此，如何设计SC-FDMA波形的TRS成为一个问题。在本文中，我们提出了一些基于SC-FDMA波形的TRS模式来跟踪和补偿相位噪声，适合于实际的5G系统。可以以频分复用（FDM）的方式映射TRS和数据，类似于同时进行LTE中的物理上行链路控制信道（PUCCH）和物理上行链路共享信道（PUSCH）传输。进一步讨论了不同TRS设计模式和生成序列的链路级性能，这表明使用新模式，可以在PAPR几乎不增长的情况下有效地改善相位噪声的影响。

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