A method, and a mobile terminal incorporating the same, of carrying out a reception decision uses a signal received from a base station in the mobile terminal. The mobile terminal includes a communication parameter calculating unit for calculating a communication parameter that is used for estimating a state of a communication environment based on a reception signal transmitted from a base station, a decision parameter setting unit for calculating a decision parameter based on a result of estimation for the state of the communication environment generated by using the communication parameter calculated by the communication parameter calculation unit, and a reception decision unit for carrying out a reception decision of the reception signal based on the decision parameter set by the decision parameter setting unit.