Comparison of estimated power spectra for different photometric redshift errors. Top: average galaxy auto-power spectrum. Bottom: cross-power spectrum reconstructed from 300 realisations of photometric datasets for three tomographic bins. The blue, green, and orange symbols show the reconstructed power spectra for Case-I (σ₀ = 0.02,  σ₀ = 0.05) and Case-II (γ₀ = 0.02), respectively. The solid, dashed, and dotted red lines are the corresponding theoretical power spectra computed with redshift distributions estimated by the convolution method using Eq. (12). The error bars are computed from the covariance matrix of simulations using Eq. (9).