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Performance analysis of frequency domain simulator of multi-UE E-UTRAN fading channel with intercarrier interference

机译:载波间干扰的多UE E-UTRAN衰落信道频域仿真器性能分析

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This paper presents a recent result of the study on efficient 3GPP compliant method to simulate multiple independent multipath fading radio channels in multi-UE (User Equipment) software defined Evolved Universal Terrestrial Radio Access Network (E-UTRAN) traffic generator. In the previous research [1], authors discussed Digital Fourier Transform (DFT) based frequency domain simulation models of a multipath fading channel, including aspects of terminal mobility and Intercarrier Interference (ICI). In this paper, previously published simulation results, showing accuracy and efficiency of the models, are confirmed using mathematical analysis of ICI phenomenon, considering nature of Orthogonal Frequency Division Multiple Access (OFDMA) schemes adapted by the 3GPP Long Term Evolution (LTE) standard. Complexity of frequency domain models is evaluated in detail using Big O notation and compared against time domain approach. The research shows that direct frequency domain linear ICI approximation, represented by the frequency domain model 2, offers good accuracy in term of ICI synthesis for the most practical Doppler frequencies and simultaneously requires less operations if the number of simulated UEs is large.
机译:本文介绍了一项有效的3GPP兼容方法研究的最新结果,该方法可在多UE(用户设备)软件定义的演进通用陆地无线接入网(E-UTRAN)流量生成器中模拟多个独立的多径衰落无线信道。在先前的研究中[1],作者讨论了基于数字傅立叶变换(DFT)的多径衰落信道的频域仿真模型,包括终端移动性和载波间干扰(ICI)方面。在本文中,考虑到根据3GPP长期演进(LTE)标准改编的正交频分多址(OFDMA)方案的性质,使用ICI现象的数学分析确认了显示模型的准确性和效率的先前发布的仿真结果。频域模型的复杂性使用Big O表示法进行了详细评估,并与时域方法进行了比较。研究表明,由频域模型2表示的直接频域线性ICI逼近在最实用的多普勒频率的ICI合成方面具有良好的准确性,并且如果模拟的UE数量较大,则同时需要较少的运算。

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