Thursday, December 8, 2022

RADAR Transceiver For Driver Assistance Systems

By Jay Soni

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Renesas has introduced an automotive RADAR Transceiver with sensor fusion technology designed for autonomous driving applications.

Credit : Renesas

Renesas has introduced a 4×4-channel, 76-81GHz transceiver designed to meet the demanding requirements of ADAS (advanced driver assistance systems) and Level 3 and higher autonomous driving applications. The device is designed in co-operation with Steradian Semiconductors Private Limited.

The new transceiver MMIC (monolithic microwave integrated circuit) is specially suited for imaging radar, long-range forward-looking radar and 4D radar, but can also be used for corner and central-processing radar architectures, the so-called “satellite” automotive radar systems. It is equipped with 4Tx and 4Rx channels. The RAA270205 supports up to 16 MIMO (multiple-input and multiple-output) channels. It can be cascaded to enable higher channel count and better radar resolution.

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Features

  • High output power for longer range, 13dBm/channel, 19dBm total
  • Low noise figure
  • Low phase noise
  • Fast chirp and high chirp linearity
  • Low power consumption
  • Fast ADC sampling up to 112.5MSPS
  • 4 lane MIPI-CSI2 interface for up to 14.4Gbps output
  • Direct output of range to obstacles with on-board range FFT engine
  • Small, easy-to-integrate eWBL package

The RAA270205 features accuracy with up to 5GHz of bandwidth, and a 112.5MSPS ADC (analog-to-digital converter) sampling rate that is nearly three times faster than competing devices. It consumes 1.2W of power which is 50 percent lower compared to the transceivers and it delivers a noise figure of 9dB, which is 3dB less than other radar transceivers. The superior chirp rate of up to 300MHz/µs improves radar resolution and object detection.


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