TIDUEY3 November   2020

 

  1.   Description
  2.   Resources
  3.   Features
  4.   Applications
  5.   5
  6. 1System Description
  7. 2System Overview
    1. 2.1 Block Diagram
      1. 2.1.1 Hardware Block Diagram
      2. 2.1.2 Software Block Diagram
        1. 2.1.2.1 mmWave SDK Software Block Diagram
        2. 2.1.2.2 Software Block Diagram of Application
    2. 2.2 Highlighted Products
      1. 2.2.1 AWR6843AOP
      2. 2.2.2 mmWave SDK
    3. 2.3 System Design Theory
      1. 2.3.1 Use-Case Geometry and Sensor Considerations
      2. 2.3.2 Low-Level Processing
      3. 2.3.3 High-Level Processing Details
        1. 2.3.3.1 DPM Model
        2. 2.3.3.2 Occupancy Detection State Machine
      4. 2.3.4 Output Through UART
  8. 3Hardware, Software, Testing Requirements, and Test Results
    1. 3.1 Required Hardware and Software
      1. 3.1.1 Hardware
      2. 3.1.2 Software
    2. 3.2 Testing and Results
      1. 3.2.1 Test Setup
      2. 3.2.2 Test Results
  9. 4Design Files
    1. 4.1 Schematics
    2. 4.2 Bill of Materials
    3. 4.3 Altium Project
  10. 5Software Files
  11. 6Related Documentation
    1. 6.1 Trademarks

2.2.1 AWR6843AOP

The AWR6843AOP is an integrated, single-chip, frequency modulated continuous wave (FMCW) sensor capable of operation in the 60 to 64 GHz band. The sensor is built with the low-power, 45nm, RFCMOS process from TI and enables unprecedented levels of integration in an extremely small form factor. The AWR6843AOP is an ideal solution for low-power, self-monitored, ultra-accurate radar systems in the in-cabin sensing space.

There are several benefits of an antenna on the package technology:

  • Small form factor: Antenna on the PCB takes up almost ~30% of the board space. With the antenna now integrated on the package, the size of the sensor reduces by ~30% compared to conventional sensors. This helps in easy vehicle integration.
  • Faster design cycle: Developer need not spend time on simulation and characterization of the antenna parameters.
  • Lower PCB cost: Low cost FR4 based PCB can be chosen for design instead of expensive roger’s material-based PCB. This saves cost.
GUID-4A20EBEE-D127-40E1-9F69-259DD1570775-low.pngFigure 2-4 IWR6843 Block Diagram

The AWR6843AOP has the following features:

  • FMCW transceiver
    • Integrated PLL, transmitter, receiver, baseband, and A2D
    • 60 to 64GHz coverage, with 4GHz available bandwidth
    • Four receive channels
    • Three transmit channels
    • Ultra-accurate chirp (timing) engine based on fractional-N PLL
    • TX power
      • 12 dBm
    • RX noise figure
      • 12 dB (60 to 64 GHz)
    • Phase noise at 1 MHz
      • –92 dBc/Hz (60 to 64 GHz)
  • Built-in calibration and self-test (monitoring)
    • ARM Cortex-R4F-based radio control system
    • Built-in firmware (ROM)
    • Self-calibrating system across frequency and temperature
  • C674x DSP for FMCW-signal processing
    • On-chip memory: 1.75MB
  • Cortex-R4F MCU for object detection, and interface control
    • Supports autonomous mode (loading the user application from QSPI flash memory)
  • Integrated peripherals
    • Internal memories with ECC
    • Up to six ADC Channels
    • Up to two SPI Channels
    • Up to two UARTs
    • CAN interface
    • I2C
    • GPIOs
    • Two-lane LVDS interface for raw ADC data and debug instrumentation