  In this paper we study the origin and the effect of amplitude and phase noise
on Laser Optical Feedback Imaging (LOFI) associated with Synthetic Aperture
(SA) imaging system. Amplitude noise corresponds to photon noise and acts as an
additive noise, it can be reduced by increasing the global measurement time.
Phase noise can be divided in three families: random, sinusoidal and drift
phase noise; we show that it acts as a multiplicative noise. We explain how we
can reduce phase noise by making oversampling or multiple measurements
depending on its type. This work can easily be extended to all SA systems
(Radar, Laser or Terahertz), especially when raw holograms are acquired point
by point.
