Time-variance of 60 GHz vehicular infrastructure-to-infrastructure (I2I) channel

Rahman, AU and Ghosh, A and Chandra, A and Vychodil, J and Blumenstein, J and Mikulasek, T and Prokes, A (2020) Time-variance of 60 GHz vehicular infrastructure-to-infrastructure (I2I) channel. In: Vehicular Communications, 26 .

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Abstract

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.

Item Type:	Journal Article
Publication:	Vehicular Communications
Publisher:	Elsevier Inc.
Additional Information:	The copyright of this article belongs to Elsevier Inc.
Department/Centre:	Division of Electrical Sciences > Electrical Communication Engineering
Date Deposited:	28 Aug 2020 11:15
Last Modified:	28 Aug 2020 11:15
URI:	http://eprints.iisc.ac.in/id/eprint/66404

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