RADAR TARGET DETECTION SYSTEM FOR AUTONOMOUS VEHICLES WITH ULTRA-LOW PHASE-NOISE FREQUENCY SYNTHESIZER

摘要

A system for detecting the surrounding environment of vehicle comprising a RADAR unit and at least one ultra-low phase-noise frequency synthesizer, is provided. A RADAR unit configured for detecting the presence and characteristics of one or more objects in various directions. The RADAR unit may include a transmitter for transmitting at least one radio signal, and a receiver for receiving the at least one radio signal returned from the one or more objects. The ultra-low phase-noise frequency synthesizer may utilize a dual loop design comprising one main PLL and one sampling PLL, where the main PLL might include a DDS or Fractional-N PLL plus a variable divider, or the synthesizer may utilize a sampling PLL only, to reduce phase-noise from the returned radio signal. This system enhances the detection of the exact location of the vehicle based on the received RADAR signatures of objects, azimuth and distance.