Performance Analysis of Automotive SAR With Radar Based Motion Estimation

by   Oded Bialer, et al.

Automotive synthetic aperture radar (SAR) can achieve a significant angular resolution enhancement for detecting static objects, which is essential for automated driving. Obtaining high resolution SAR images requires precise ego vehicle velocity estimation. A small velocity estimation error can result in a focused SAR image with objects at offset angles. In this paper, we consider an automotive SAR system that produces SAR images of static objects based on ego vehicle velocity estimation from the radar return signal without the overhead in complexity and cost of using an auxiliary global navigation satellite system (GNSS) and inertial measurement unit (IMU). We derive a novel analytical approximation for the automotive SAR angle estimation error variance when the velocity is estimated by the radar. The developed analytical analysis closely predicts the true SAR angle estimation variance, and also provides insights on the effects of the radar parameters and the environment condition on the automotive SAR angle estimation error. We evaluate via the analytical analysis and simulation tests the radar settings and environment condition in which the automotive SAR attains a significant performance gain over the angular resolution of the short aperture physical antenna array. We show that, perhaps surprisingly, when the velocity is estimated by the radar the performance advantage of automotive SAR is realized only in limited conditions. Hence since its implementation comes with an increase in computation and system complexity as well as an increase in the detection delay it should be used carefully and selectively.


page 2

page 3

page 6

page 7

page 8

page 9

page 10

page 13


Radar shadow detection in SAR images using DEM and projections

Synthetic aperture radar (SAR) images are widely used in target recognit...

Super-resolution radar imaging via convex optimization

A radar system emits probing signals and records the reflections. Estima...

Generation of SAR Image for Real-life Objects using General Purpose EM Simulators

In the applications related to airborne radars, simulation has always pl...

WSR: A WiFi Sensor for Collaborative Robotics

In this paper we derive a new capability for robots to measure relative ...

Bistatic SAR ATR

With the present revival of interest in bistatic radar systems, research...

Soil moisture estimation from Sentinel-1 interferometric observations over arid regions

We present a methodology based on interferometric synthetic aperture rad...

Deep learning based landslide density estimation on SAR data for rapid response

This work aims to produce landslide density estimates using Synthetic Ap...

Please sign up or login with your details

Forgot password? Click here to reset