<FONT face=Verdana>This paper investigated the early detection problem of multiple moving targets in MIMO radar systems using the track-before-detect (TBD) techniques. Based on the binary generalized likelihood ratio test (GLRT) with a priori known number of targets

a suboptimum multi-target TBD algorithm using successive-target-cancellation and polar Hough transform (STC-PHT) was proposed

and false alarm probability and detection probability formulae were derived. Compared with previous multi-target TBD algorithms

the new proposed algorithm has low computational complexity

no need for the prior information of the number of targets

and avoids the implementation of multiple hypothesis tests when the number of targets is unknown. The simulation results show that the new proposed algorithm can effectively improve the detection performance of MIMO radar at low signal-to-noise ratio.