5G BWP基带信号低延时产生技术研究

Research on Low-latency Generation Technology for 5G BWP Baseband Signals

针对5G系统大带宽下采用频域插值和时域插值方法实现带有循环前缀的正交频分复用(Cyclic Prefix Orthogonal Frequency Division Multiplexing,CP-OFDM)调制带来的高时延问题,提出了一种满足5G系统低时延要求的宽带(Bandwidth Part,BWP)基带信号产生方法。该方法采用CP直接输出预处理技术,可提前一个符号时间输出5G基带信号,采用时域速率匹配技术可大幅度地降低基带处理时延,满足5G系统对宽带滤波器组多载波技术(Filter-Bank MultiCarrier,FBMC)信号产生的高速率、低时延的要求,可用于5G系统物理层信号发生单元,以及5G测试的终端模拟器中。

To address the high delay problem caused by using frequency-domain interpolation and timedomain interpolation to achieve CP-OFDM(Cyclic Prefix Orthogonal Frequency Division Multiplexing)modulation under the large bandwidth of 5G systems,this paper proposes a BWP(Bandwidth Part)signal generation method that meets the low delay requirements of 5G systems.The method uses CP direct output preprocessing technology to output 5G baseband signals one symbol time in advance,and uses time-domain rate matching technology to greatly reduce the baseband processing delay,which can meet the requirements of 5G systems for high speed and low delay of wideband FBMC(Filter-bank multicarrier)signal generation,and can be used in the physical layer signal generation unit of 5G systems,as well as in the terminal simulators of 5G test.