Disclosed is a wideband and multi-band frequency up converter used in a satellite earth station. The partitioning and assigning is configurable for operation in different modes. It is possible to reduce the number of times of re-transmission by improving the probability of correcting forward errors using more error controlling bits as the state of the channel is worse and to minimize the waste of resources using less error controlling bits as the state of the channel is better, to thus obtain the optimal performance and guarantee the minimum delay time.