A gouging tool is introduced at a slope angle \u03b8 to form small, low fins at a position shifted inward from an edge of a surface of a metal plate having a high coefficient of thermal conductivity; and the small fins are sequentially formed in a plural number at a fixed pitch until a blade section of the gouging tool reaches a prescribed depth. A heat generating unit is arranged inside the housing, and the heat dissipating plate includes a main body arranged inside the housing and at least one cooling portion extended from the main body and exposed on the housing. The system also includes a receiver configure to receive the signal and extract the information symbols from the signal, the information symbols extracted using a second chaotic sequence of chips generated at the receiver.