  We present a relativistic model of pulsar radio emission by plasma
accelerated along the rotating magnetic field lines projected on to a 2D plane
perpendicular to the rotation axis. We have derived the expression for the
trajectory of a particle, and estimated the spectrum of radio emission by the
plasma bunches. We used the parameters given in the paper by Peyman and
Gangadhara (2002). Further the analytical expressions for the Stokes parameters
are obtained, and compared their values with the observed profiles. The one
sense of circular polarization, observed in many pulsars, can be explained in
the light of our model.
