  We study the Unruh effect in doubly special relativity (DSR) framework by
generalising the Doppler-shift method to DSR. For both the scalar and Dirac
particles, we observe a deviation in the power spectrum of Unruh radiation from
the standard Bose-Einstein and Fermi-Dirac distributions, respectively, due to
the presence of the frame independent length scale of DSR. We further show that
this deviation results in the modification of Unruh temperature which then
depends non-linearly on the proper acceleration in DSR.
