The millimeter Wave (mmW) radar characterization, testing, verification challenges and opportunities

Jha, Uma S.

doi:10.1109/autest.2018.8532561

Cited by 15 publications

(8 citation statements)

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“…Multi-path in an indoor environment contains rays reflected from the walls, ceiling, floor, as well as from obstacles. However, each reflection of a ray from a surface results in an attenuation in accordance with the reflection coefficient given by Fresnel's Equation (5). The more it is reflected, the less power it maintains, so effectively, there is a finite number of reflections that need to be taken into consideration in the summation Equation (1).…”

Section: Number Of Dominant Rays: Simulation Resultsmentioning

confidence: 99%

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Millimeter Wave Propagation in Long Corridors and Tunnels—Theoretical Model and Experimental Verification

Rapaport

Pinhasi

2020

Electronics

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The development of the Fifth-Generation (5G) of cellular communications considers bands in millimeter waves (MMW) for indoor, short-range links. The propagation of MMW is affected by atmospheric and weather conditions, specular reflections from surfaces, and the directivity of the antennas. The short wavelength enables utilization of a quasi-optical propagation model for the description of indoor multi-path scenarios. A study of MMW propagation in tunnels, long corridors, or canyons is carried out using ray-tracing to evaluate the link budget and group delay. The analysis considers radiation patterns of both transmitting and receiving antennas, deriving a criterion for the number of dominating rays. Error analysis demonstrates the convergence of the method, while using a finite number of reflected rays. Experiments in a small-scale tunnel model demonstrate the accuracy of the analysis.

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Section: Number Of Dominant Rays: Simulation Resultsmentioning

confidence: 99%

“…New bands in the MMW spectrum are already allocated, mainly in the vicinity of 28 GHz [1][2][3][4]. In addition to the growth in cellular communications, the rising popularity of autonomic vehicles has accelerated development in automotive radars, which are based on millimeter wave technology [5,6].…”

Section: Introductionmentioning

confidence: 99%

Millimeter Wave Propagation in Long Corridors and Tunnels—Theoretical Model and Experimental Verification

Rapaport

Pinhasi

2020

Electronics

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“…In the real radiated immunity test, the developed Innova-EMS platform can apply the customized virtue target vehicle and road environment conveniently. This design with specific velocity and distance can be simulated by a radar simulator based on the Doppler effect and time-delay algorithm [16,17]. In addition, the image can be projected on the screen, which can be managed by the algorithm for the vehicle camera.…”

Section: Vhil-based Radiated Immunity Test Platformmentioning

confidence: 99%

“…These are based on traditional setups in ISO 11451-2 as shown in Figure 1 [15]. The research presented in [9,16,17] focuses on the use of radar simulators for ACC immunity testing. However, this study only demonstrated the activation of ACC in an anechoic chamber and performed no actual radio immunity testing.…”

Section: Introductionmentioning

confidence: 99%

Research on Radiated Immunity Test Methods for ADAS Functions Considering Vehicle In-the-Loop

Qin

Tang

Jia

et al. 2022

WEVJ

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The radiated immunity of passenger cars and commercial vehicles is validated using electromagnetic interference from off-vehicle radiation sources in an anechoic chamber according to the procedure in ISO 11451-2. Common electrical or electronic vehicle systems, including dual flash, monitors, and entertainment systems, must be validated using a standardized immunity evaluation procedure. However, Automated Driver Assistance System (ADAS) functions often lack verification in complex electromagnetic fields, which might create potential risk due to electromagnetic compatibility problems. For example, radar and camera sensors based on autonomous emergency braking (AEB), adaptive cruise control (ACC), or lane departure warning (LDW) functions may be ineffective in the real world if subjected to electromagnetic interference. This paper presents a new methodology to evaluate vehicle immunity performance based on the main ADAS functions. A target simulator and a virtual driving environment are designed to trigger AEB, ACC, and LDW functions in an anechoic chamber. Moreover, the vehicle In-the-Loop (VHIL) conception is also applied by acquiring and analyzing key ADAS-related signals. The reliability of ADAS functions at the whole-vehicle level can be evaluated and improved using standardized external radiation sources.

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“…The millimeter wave (mmWave) technology, with its high resolution and the advantage of penetrability in dealing with insulating materials like paper, clothing, and fog, is now an important topic in radar imaging [1]. It has been applied in various fields, such as medical diagnostics [2,3], security screening [4][5][6], military fields [7,8], and nondestructive testing [9][10][11][12]. A vital component of these mmWave imaging systems is the in-phase and quadrature (IQ) demodulation which its performance can affect the imaging quality.…”

Section: Introductionmentioning

confidence: 99%

BPSK Modulation‐Based Local Oscillator‐Free IQ Demodulation for Millimeter Wave Imaging

et al. 2021

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The precision of local oscillator (LO) signal in in-phase and quadrature (IQ) demodulation strongly affects the imaging performance of millimeter wave (mmWave) radars. Therefore, to eliminate the requirement for high-precision LO, a simple yet effective digital IQ demodulation method has been proposed with the aid of a specified sampling scheme in order to eliminate the demand for LO. Based on the bandpass sampling theorem, the characteristic of the intermediate frequency signal of mmWave imaging indicates that the LO is unrequired if the sampling rate is twice of the frequency of the carrier of the intermediate signal. In this way, the in-phase signal would be directly and accurately obtained by performing the Binary-Phase-Shift-Keying (BPSK) modulation on the samples, based on which the IQ demodulation would be completed by using the Hilbert transform. The proposed method does not employ LO and thus simplifies the demodulation process and is suitable for implementation in a Field-Programmable Gate Array (FPGA) with fewer hardware resources. To verify the method, a three-dimensional mmWave radar imaging is carried out at the 30-34 GHz bandwidth, where the sampling and digital IQ demodulation are realized by an ADC (AD9250) and FPGA (XC7K325T), respectively. The results show a simplified transceiver with lower requirements and the prospect of the proposed method being applied in radar imaging and other related fields.

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The millimeter Wave (mmW) radar characterization, testing, verification challenges and opportunities

Cited by 15 publications

References 0 publications

Millimeter Wave Propagation in Long Corridors and Tunnels—Theoretical Model and Experimental Verification

Millimeter Wave Propagation in Long Corridors and Tunnels—Theoretical Model and Experimental Verification

Research on Radiated Immunity Test Methods for ADAS Functions Considering Vehicle In-the-Loop

BPSK Modulation‐Based Local Oscillator‐Free IQ Demodulation for Millimeter Wave Imaging

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