A location method aiming at suppressing NLOS errors in cellular networks using single observer is proposed

which is named by pseudo-target dynamic feasible region constraint method.The method needs less resource and cost than traditional multi-base-stations location methods.The scatters around the target are regarded as pseudo-targets.AOA and the changing rate of AOA of pseudo-targets are measured to get the location of pseudo-targets.Then the feasible region of real target is constructed according to the location of pseudo-targets and the geometrical relationship between real targets and pseudo-targets

in which the optimization methods are applied to estimate the location of real target and deal with the NLOS errors.Pseudo-target dynamic feasible region constraint method converts multi-path signals

usually regarded as harmful factors

to advantage factors.As proved in simulation experiment

the proposed method can depress the location errors effectively and rapidly.