Introduction
This use case provides the sensing configuration for a Medium to Long Range Traffic Monitoring Radar which is typically mounted on a post on the opposite side of the intersection to detect vehicles across multiple lanes and track their position and velocity as they approach the intersection and the stop bar. This use case is based on TI's mmWave Traffic Monitoring Object Detection and Tracking Reference Design and the reader is encouraged to visit the design webpage for more details.
Step 1: System Parameters
| Parameter | Case-1, Mid Range (MIMO) | Case-2, Long Range (Non-MIMO) |
|---|---|---|
| Device Type | IWR1642 | IWR1642 |
| Maximum range (m) | 70 | 120 |
| Range resolution (m) | 0.40 | 1.0 |
| Range accuracy (m) | 0.07 | 0.18 |
| Maximum velocity (km/h) | 34 | 70 |
| Velocity resolution (km/hr) | 1.5 | 1.2 |
| Total Sweep Bandwidth (MHz) | 426 | 178 |
| RCS (m2 @ range) | Car (5m2) @ 77m | Car (5m2) @ 107m |
| Update rate (Hz) | 25 | 25 |
| Radar Cube Size (KB) | 368 | 468 |
Step 2: Chirp Configuration
| 1. | Chirp Configuration | Case-1, Mid Range (MIMO) | Case-2, Long Range (Non-MIMO) |
| 2. | Special considerations, Limitations etc | The Chirp Configuration used in TI's mmWave Traffic Monitoring Object Detection and Tracking Reference Design assumes a fixed sampling rate of 5 Msps whereas the Sensing Estimator calculates the minimum required sampling rate based on the maximum beat frequency. Because of this, the chirp configuration presented here does not exactly match the one used in the TI Design. | |
Step 3: OOB Demo Configuration File
| Use Case | OOB Demo Configuration File | |
| 1 | Traffic Monitoring Case-1, Mid Range (MIMO) | |
| 2 | Traffic Monitoring Case-2, Long Range (Non-MIMO) |
Assumptions and Miscellaneous Information
| System Level Assumptions | ||
|---|---|---|
| Case-1, Mid Range (MIMO) | Case-2, Long Range (Non-MIMO) | |
| Starting frequency (GHz) | 76 | 76 |
| TX Antenna Gain (dB) | 8 | 10 |
| RX Antenna Gain (dB) | 8 | 10 |
| Device Type | IWR1642 | IWR1642 |
| Number of TX Antennas used | 2 | 1 |
| Number of RX Antennas used | 4 | 4 |
Testing and Results
For details on Test Setup and Results, please refer to the Testing and Results section of the Design Guide for the Traffic Monitoring Object Detection and Tracking Reference Design.