In a realistic radar detection scenario

the disturbance power generated by thermal noise and clutter is unknown.So Gini F proposes a method of estimating the disturbance power and then presents an adaptive successive hypotheses test (SHT) procedure to detect the multiple targets in the same range-azimuth resolution cell of a radar system.However

it is hard to get the threshold for the estimation method.Aiming at the above problem

a new estimation method is put forth and the value of relative threshold is derived.An improved adaptive SHT procedure based on the new estimation method is given.The simulation results show that the improved adaptive SHT procedure has a better detection probability.