A Novel Simulation Model for Nonstationary Rice Fading Channels

Jiang, Kaili; Chen, Xiaomin; Zhu, Qiuming; Chen, Lele; Xu, Dazhuan; Chen, Bing

doi:10.1155/2018/8086073

Cited by 8 publications

(4 citation statements)

References 23 publications

(63 reference statements)

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“…17 and 19 that the reflection of the oncoming truck produces a tall spectral spike that commutes from an initial positive frequency of around 250 Hz to a negative frequency of -250 Hz. This behavior is consistent with the theoretical models of electromagnetic wave propagation when the source and the observer are in motion [33], [34].…”

Section: B Doppler Signatures Of Relevant Road Safety Eventssupporting

confidence: 89%

Doppler Spectrum Measurement Platform for Narrowband V2V Channels

et al. 2022

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This paper describes the implementation of a Doppler spectrum measurement platform for narrowband frequency-dispersive vehicle-to-vehicle (V2V) channels. The platform is based on a continuous-wave (CW) channel sounding approach widely used for path-loss and large-scale fading measurements, but whose effectiveness to measure the Doppler spectrum of V2V channels is not equally known. This channel sounding method is implemented using general-purpose hardware in a configuration that is easy to replicate and that enables a partial characterization of frequency-dispersive V2V channels at a fraction of the cost of a dedicated channel sounder. The platform was assessed in a series of field experiments that collected empirical data of the instantaneous Doppler spectrum, the mean Doppler shift, the Doppler spread, the path-loss profile, and the large-scale fading distribution of V2V channels under realistic driving conditions. These experiments were conducted in a highway scenario near San Luis Potosí, México, at two different carrier frequencies, one at 760 MHz and the other at 2,500 MHz. The transmitting and receiving vehicles were moving in the same direction at varying speeds, ranging from 20 to 130 km/h and dictated by the unpredictable traffic conditions. The obtained results demonstrate that the presented measurement platform enables the spectral characterization of narrowband V2V channels and the identification of their Doppler signatures in relevant road-safety scenarios, such as those involving overtaking maneuvers and rapid vehicles approaching the transmitter and receiver in the opposite direction.INDEX TERMS Doppler shift, Doppler spectrum, fading channels, radio-frequency propagation, vehicular communications.

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Section: B Doppler Signatures Of Relevant Road Safety Eventssupporting

confidence: 89%

Doppler Spectrum Measurement Platform for Narrowband V2V Channels

et al. 2022

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“…It is shown that the measured PDF of proposed channel emulator is close to the result of field test in [31]. Based on the theoretical expressions of ( 28)-( 30) in [32] and ( 9)-( 10) in [33], the absolute values of time-variant CCF of firt two paths are calculated and given in Figure 11. In the figure, we assume that the antenna spaces of the BS and MS are the same, and equal to twice the wavelength of carrier.…”

Section: Measured Results and Analysismentioning

confidence: 57%

A Flexible FPGA-Based Channel Emulator for Non-Stationary MIMO Fading Channels

et al. 2020

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In this paper, a discrete non-stationary multiple-input multiple-output (MIMO) channel model suitable for the fixed-point realization on the field-programmable gate array (FPGA) hardware platform is proposed. On this basis, we develop a flexible hardware architecture with configurable channel parameters and implement it on a non-stationary MIMO channel emulator in a single FPGA chip. In addition, an improved non-stationary channel emulation method is employed to guarantee accurate channel fading and phase, and the schemes of other key modules are also illustrated and implemented in a single FPGA chip. Hardware tests demonstrate that the output statistical properties of proposed channel emulator, i.e., the probability density function (PDF), cross-correlation function (CCF), Doppler power spectrum density (DPSD), and the power delay profile (PDP) agree well with the corresponding theoretical ones.

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“…The proposals in [46] were applied by Dahech et al [47] to characterize non-stationary V2X channels allowing for speed and trajectory variations of the vehicles [47]. Based on the concepts discussed in [45][46][47], novel simulation models for non-stationary vehicular channels under velocity variations of the MSs were proposed independently in [48,49]. In the aforementioned papers, the spotlight was on narrowband channels.…”

Section: Motivation and Related Workmentioning

confidence: 99%

A Non-WSSUS Channel Simulator for V2X Communication Systems

et al. 2020

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This paper presents a simulator of non-wide sense stationary uncorrelated scattering (non-WSSUS) multipath fading channels for the performance analysis of vehicle-to-everything (V2X) communication systems. The proposed simulator is constructed with the combination of the Monte Carlo and sum-of-cisoids (SOC) principles, and it is suitable for multicarrier transmission schemes such as those defined for dedicated short-range communications (DSRC) and cellular-based V2X (C-V2X) communications. The channel simulator provides an accurate and flexible solution to reproduce the time and frequency (TF) correlation properties of non-WSSUS vehicular channels under arbitrary isotropic and non-isotropic scattering conditions. Furthermore, the proposed simulator allows velocity variations and non-linear trajectories of the mobile stations (MSs). To demonstrate the practical value of the presented simulator, we evaluate the bit error rate (BER) performance of two channel estimation techniques that are considered for IEEE 802.11p transceivers, namely the least squares (LS) estimator and the spectral temporal averaging (STA) technique. The BER performance of both channel estimators was analyzed by considering three propagating scenarios for road safety applications. Our results show that the non-stationary characteristics of the vehicular multipath fading channel have nearly no effects on the LS estimator’s BER performance. In contrast, the performance of the STA estimator is significantly affected by the channel’s non-stationary characteristics. A variation of the original STA technique that applies only a temporal averaging is introduced in this work to improve the system’s BER in non-WSSUS channels.

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A Novel Simulation Model for Nonstationary Rice Fading Channels

Cited by 8 publications

References 23 publications

Doppler Spectrum Measurement Platform for Narrowband V2V Channels

Doppler Spectrum Measurement Platform for Narrowband V2V Channels

A Flexible FPGA-Based Channel Emulator for Non-Stationary MIMO Fading Channels

A Non-WSSUS Channel Simulator for V2X Communication Systems

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