SWRA662A January   2020  – September 2022 AWR1243 , AWR1443 , AWR1642 , AWR1843 , AWR1843AOP , AWR2243 , AWR6843 , AWR6843AOP , IWR1443 , IWR1642 , IWR1843 , IWR6443 , IWR6843 , IWR6843AOP

 

  1.   Interference Mitigation For AWR/IWR Devices
  2.   Trademarks
  3. 1Introduction
  4. 2Types of Interference in FMCW Radar
    1. 2.1 FMCW Radar
    2. 2.2 The Radar Equation for Interference
    3. 2.3 Types of Interference
      1. 2.3.1 Crossing Interference
      2. 2.3.2 Performance Analysis for Crossing Interference
      3. 2.3.3 Parallel Interference
      4. 2.3.4 Between Crossing and Parallel Interference
  5. 3Interference Avoidance
    1. 3.1 Standardization: Different Frequency Band and Time Slot for Different Radars
    2. 3.2 Different Starting Time for Parallel Interference
    3. 3.3 Sensing and Avoidance
    4. 3.4 Antenna Polarization
  6. 4Localization and Interference Mitigation
    1. 4.1 Localization
    2. 4.2 Mitigation
  7. 5Dithering and Randomization
  8. 6Conclusion
  9. 7References
  10. 8Revision History

3.4 Antenna Polarization

The final method involves specific polarization of antennas. This method uses, for example, horizontal polarization for a certain set of antennas, and vertical authorization for another set. If an aggressor uses horizontally polarized antennas for transmission and the victim uses vertical polarized antennas for its receiver, then the signal from an aggressor is attenuated (by ~ 10 dB) at the antenna of the victim. This method requires expertise in antenna design. This is a useful method, but only two different options, vertical and horizontal polarization, are available. Also, this method involves increased complexity in antenna design.