  In Frequency Modulated Continuous Waveform (FMCW) radar systems, the phase
noise from the Phase-Locked Loop (PLL) can increase the noise floor in the
Range-Doppler map. The adverse effects of phase noise on close targets can be
mitigated if the transmitter (Tx) and receiver (Rx) employ the same chirp, a
phenomenon known as the range correlation effect.
  In the context of a multi-static radar network, sharing the chirp between
distant radars becomes challenging. Each radar generates its own chirp, leading
to uncorrelated phase noise. Consequently, the system performance cannot
benefit from the range correlation effect.
  Previous studies show that selecting a suitable code sequence for a Phase
Modulated Continuous Waveform (PMCW) radar can reduce the impact of
uncorrelated phase noise in the range dimension. In this paper, we demonstrate
how to leverage this property to exploit both the mono- and multi-static
signals of each radar in the network without having to share any signal at the
carrier frequency. The paper introduces a detailed signal model for PMCW radar
networks, analyzing both correlated and uncorrelated phase noise effects in the
Doppler dimension. Additionally, a solution for compensating uncorrelated phase
noise in Doppler is presented and supported by numerical results.
