  Signature of heavier charged Higgs boson, much above the top quark mass, is
investigated at the LHC Run 2 experiments, following its decay mode via top and
bottom quark focusing on both hadronic and leptonic signal final states. The
generic two Higgs doublet model framework is considered with a special emphasis
on supersymmetry motivated Type II model. The signal is found to heavily
affected by the huge irreducible backgrounds due to the top pair production and
QCD events. The jet substructure technique is used to tag moderately boosted
top jets in order to reconstruct charged Higgs mass. The simple cut based
analysis is performed optimizing various kinematic selections, and the signal
sensitivity is found to be reasonable for only lower range of charged Higgs
masses for very high luminosity 3000 fb$^{-1}$ option. However, employing the
multi-variate analysis(MVA) technique, a remarkable improvement in signal
sensitivity is achieved. We find, the charged Higgs signal for the mass range
about $300-600$ is observable with 1000 fb$^{-1}$ luminosity option. However,
for more high luminosity option 3000 fb$^{-1}$, the discovery potential can be
extended to $700-800$ GeV.
