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Time-variance of 60 GHz vehicular infrastructure-to-infrastructure (I2I) channel
Vehicular Communications ( IF 5.8 ) Pub Date : 2020-08-14 , DOI: 10.1016/j.vehcom.2020.100288
Aniq Ur Rahman , Anirban Ghosh , Aniruddha Chandra , Josef Vychodil , Jiri Blumenstein , Tomas Mikulasek , Ales Prokes

In this paper, we study the time-variance of a roadside infrastructure to infrastructure (I2I) channel operating at 60 GHz millimetre wave (mmWave) band, where the time-variance is caused by moving vehicles acting as scatterers. At first, measurement data is obtained by placing the transmitter (TX) and the receiver (RX) at different heights to emulate a link between two nonidentical roadside units (RSUs), and time-domain channel sounding is performed by sending complementary Golay sequences from the TX to the RX. A linear piece-wise interpolation of the corresponding temporal auto-correlation function (ACF) is used to find the Doppler spread of the I2I channel, where our interpolation method compensates for a slower sampling rate. Next, a framework is presented for time-variant channel impulse response (CIR) simulation which focuses on moving scatterers only and validates the linear piece-wise ACF model. The framework is useful for time-variant vehicular I2I channel simulation and in speed estimation related vehicular applications. Finally, a double-slope curve-fitted analytical model for ACF is proposed as a generalisation to the linear piece-wise model. The proposed model and its Doppler spectrum are found to be in agreement with the analytical results for fixed-to-fixed (F2F) channels with moving scatterers and matches perfectly with the measured data.



中文翻译:

60 GHz车辆基础设施到基础设施(I2I)通道的时变

在本文中,我们研究了在60 GHz毫米波(mmWave)频段上工作的路边基础设施到基础设施(I2I)信道的时变,其中时变是由充当散射器的移动车辆引起的。首先,通过将发射器(TX)和接收器(RX)放置在不同的高度,以模拟两个不同路边单元(RSU)之间的链接,获得测量数据,并通过从TX到RX。对应的时间自相关函数(ACF)的线性分段插值用于查找I2I通道的多普勒扩展,其中我们的插值方法可补偿较慢的采样率。下一个,提出了用于时变信道脉冲响应(CIR)模拟的框架,该框架仅关注移动散射体,并验证了线性分段ACF模型。该框架可用于时变车载I2I通道仿真以及与速度估算相关的车载应用。最后,提出了双斜率曲线拟合的ACF分析模型,作为对线性分段模型的推广。发现所提出的模型及其多普勒频谱与具有移动散射体的固定到固定(F2F)通道的分析结果一致,并且与测量数据完美匹配。提出了一种双斜率曲线拟合的ACF分析模型,作为对线性分段模型的推广。发现所提出的模型及其多普勒频谱与具有移动散射体的固定到固定(F2F)通道的分析结果一致,并且与测量数据完美匹配。提出了一种双斜率曲线拟合的ACF分析模型,作为对线性分段模型的推广。发现所提出的模型及其多普勒频谱与具有移动散射体的固定到固定(F2F)通道的分析结果一致,并且与测量数据完美匹配。

更新日期:2020-08-14
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