Preliminary simulations and roughly algorithms show how the use of wavelet packets are very promising in itermodulation disturbance rejection for converter bridge control. The presented contribution wants to pay attention on an original way to states a possible converter bridge control by using wavelet packets. The presented attack to the problem could represent a possible alternative to the traditional PWM control for the converter bridge. The idea is to find an algorithm which guaranties the needed power supply and in the meantime a high level of the S/N ratio. One proposes a roughly algorithm which find the length of the active switching function looking for suitable scaling function. The open problem consists of checking the suitability of its formulation in order to build a rigorous algorithm which can find a switching control law.