基于AWR1843的77-79GHz调频连续波雷达传感器解决方案

2022-04-12 12:19分类：传感器阅读：

TI公司的AWR1843是77-79GHz电台广播持续波（FMCW）雷达探测感应器，选用TI功耗低45nm RFCMOS加工工艺生产制造，具备十分高的处理速度和特别小样子系统软件，工作中频率段76-81GHz.元器件集成化了DSP分系统，包括了用以雷达探测信号分析的性能的C674x DSP.元器件还包含BIST分系统，以开展无线通信配备，操纵和校正，及其根据客户可编程控制器ARM R4F的车辆插口。具备四个接受通道，三个推送通道，根据成绩N PLL的超精密度啁啾模块，TX输出功率12dBm，RX噪声（76-77GHz） 14dB，关键用在盲区检测，变更车道輔助系统软件，街口交通出行报警，泊车輔助系统软件，占有检验及其简易图像识别和汽车车门打开器运用。文中详细介绍了AWR1843关键特点，框架图，CPU子系统结构图，参照原理图及其评定控制模块AWR1843BOOST关键特点和原理图。

The AWR1843 device is an integrated single-chip FMCW radar sensor capable of operaTIon in the 76- to81-GHz band. The device is built with TI’s low-power 45-nm RFCMOS process and enablesunprecedented levels of integraTIon in an extremely small form factor. The AWR1843 is an ideal solutionfor low-power， self-monitored， ultra-accurate radar systems in the automotive space.

The AWR1843 device is a self-contained FMCW radar sensor single-chip solution that simplifies theimplementation of Automotive Radar sensors in the band of 76 to 81 GHz. It is built on TI’s low-power 45-nm RFCMOS process， which enables a monolithic implementation of a 3TX， 4RX system with built-in PLLand A2D converters. It integrates the DSP subsystem， which contains TI’s high-performance C674x DSPfor the Radar Signal processing. The device includes a BIST processor subsystem， which is responsible for radio configuration， control， and calibration. Additionally the device includes a user programmable ARMR4F based for automotive interfacing. The Hardware Accelerator block （HWA） can perform radarprocessing and can help save MIPS on the DSP for higher level algorithms. Simple programming modelchanges can enable a wide variety of sensor implementation （Short， Mid， Long） with the possibility ofdynamic reconfiguration for implementing a multimode sensor. Additionally， the device is provided as acomplete platform solution including reference hardware design， software drivers， sample configurations，API guide， and user documentation.

AWR1843关键特点：

? FMCW Transceiver

– Integrated PLL， Transmitter， Receiver，Baseband， and A2D

– 76- to 81-GHz Coverage With 4 GHz AvailableBandwidth

– Four Receive Channels

– Three Transmit Channels

– Ultra-Accurate Chirp Engine Based onFractional-N PLL

– TX Power： 12 dBm

– RX Noise Figure：

– 14 dB （76 to 77 GHz）

– 15 dB （77 to 81 GHz）

– Phase Noise at 1 MHz：

– –95 dBc/Hz （76 to 77 GHz）

– –93 dBc/Hz （77 to 81 GHz）

? Built-in Calibration and Self-Test （Monitoring）

– ARM? Cortex?-R4F-Based Radio ControlSystem

– Built-in Firmware （ROM）

– Self-calibrating System Across Frequency andTemperature

? C674x DSP for FMCW Signal Processing

? On-Chip Memory： 2MB

? Cortex-R4F Microcontroller for Object Tracking andClassification， AUTOSAR， and Interface Control

– Supports Autonomous Mode （Loading UserApplication from QSPI Flash Memory）

? Integrated Peripherals

– Internal Memories With ECC

? Host Interface

– CAN （Two Instances， One Being CAN-FD）

? Other Interfaces Available to User Application

– Up to 6 ADC Channels

– Up to 2 SPI Channels

– Up to 2 UARTs

– I2C

– GPIOs

– 2-Lane LVDS Interface for Raw ADC Data andDebug Instrumentation

? ASIL B Targeted

? AECQ100 Qualified

? AWR1843 Advanced Features

– Embedded Self-monitoring With No HostProcessor Involvement

– Complex Baseband Architecture

– Embedded Interference Detection Capability

– Programmable Phase Rotators in Transmit Pathto Enable Beam Forming

? Power Management

– Built-in LDO Network for Enhanced PSRR

– I/Os Support Dual Voltage 3.3 V/1.8 V

? Clock Source

– Supports External Oscillator at 40 MHz

– Supports Externally Driven Clock （Square/Sine）at 40 MHz

– Supports 40 MHz Crystal Connection with LoadCapacitors

? Easy Hardware Design

– 0.65-mm Pitch， 161-Pin 10.4 mm × 10.4 mmFlip Chip BGA Package for Easy Assembly andLow-Cost PCB Design

– Small Solution Size

? Supports Automotive Temperature OperatingRange

AWR1843运用：

? Blind Spot Detection

? Lane Change Assistance

? Cross Traffic Alert

? Parking Assistance

? Occupancy Detection

? Simple Gesture Recognition

? Car Door Opener Applications

图1.AWR1843框架图

图2.AWR1843车辆运用的基层民主雷达探测感应器框架图

图3.AWR1843CPU子系统结构图

图4.AWR1843参照原理图

图5.AWR1843参照原理图高层走曲线图

图6.AWR1843参照原理图高层走曲线图特写

图7.AWR1843参照原理图最底层走曲线图

评定控制模块AWR1843BOOST

AWR1843 Evaluation Module （AWR1843BOOST） Single-Chip mmWave Sensing Solution The AWR1843 BoosterPack? from Texas Instruments? is an easy-to-use evaluation board for theAWR1843 mmWave sensing device， with direct connectivity to the microcontroller （MCU） LaunchPad?Development Kit. The BoosterPack contains everything required to start developing software for on-chipC67x DSP core and low-power Arm? R4F controllers， including onboard emulation for programming anddebugging as well as onboard buttons and LEDs for quick integration of a simple user interface.

The AWR1843 BoosterPack from Texas Instruments is an easy-to-use evaluation board for the AWR1843mmWave sensing device， with direct connectivity to the microcontroller （MCU） LaunchPad DevelopmentKit. The BoosterPack contains everything required to start developing software for on-chip C67x DSP coreand low-power ARM R4F controllers， including onboard emulation for programming and debugging as wellas onboard buttons and LEDs for quick integration of a simple user interface.

The standard 20-pin BoosterPack headers make the device compatible with a wide variety of TI MCULaunchPads and enables easy prototyping.

评定控制模块AWR1843BOOST关键特点：

? Two 20-pin LaundPad connectors that leverages the ecosystem of the TI LaunchPad

? XDS110 based JTAG emulation with a serial port for onboard QSPI flash programming

? Back-channel UART through USB-to-PC for logging purposes

? Onboard antenna

? 60-pin， high-density （HD） connector for raw analog-to-digital converter （ADC） data over LVDS andtrace-data capability

? Onboard CAN-FD transceiver

? One button and two LEDs for basic user interface

? 5-V power jack to power the board

评定控制模块AWR1843BOOST包含：

? AWR1843 evaluation board