A method for specifying a transport block-to-codeword mapping relationship and a method for transmitting a downlink signal using the same are described. The signal processor contains, among other things, a programmable logic configuration circuitry that provides a logic configuration to the programmable logic circuitry. If the recognition result represents a point on the map, a distance between the point and a base point on the map is calculated. The mounting terminals include a metal film formed by sputtering or vacuum evaporation and electroless plating film formed on a surface of the metal film.