Incoherent detector performance analysis for lognormal fluctuating targets

We deal with the performance prediction of the incoherent radar receiver (i.e. squared-law plus integrator) in the presence of independent and possibly non-identically distributed target backscattered echoes. Specifically, we first approximate the lognormal sums with a new lognormal probability density function (pdf). Based on the approximation, we develop an approximate expression of the detection probability. Finally, we assess the detection performance for different target models via several numerical simulations.