  We present an internal shocks model to investigate particle acceleration and
radiation production in microquasar jets. The jet is modelled with discrete
ejecta at various time intervals. These ejecta (or 'shells') may have different
properties including the bulk velocity. Faster shells can catch up and collide
with the slower ones, thus giving rise to shocks. The particles are accelerated
inside the shocked plasma. Each collision results in a new shell, which may
take part in any subsequent collisions as well as radiate due to synchrotron
radiation. Almost continuous energy dissipation along the jet can be obtained
with a large number of shell collisions. We investigate the spectral energy
distribution of such jets as well as the physical significance of various
parameters (e.g. the time interval between ejections and the shell size).
