A working surface panel, a bottom panel, a first side panel, a second side panel, and a back panel are removably attached to define a conductor resource center having an inner space. To achieve a high transmission rate and good resistance to interference, the transmitter is configured to code the complex channel symbols by using orthogonally distributed channel resources into channel symbols such that a channel symbol to be transmitted using at least one antenna pattern during at least one channel resource unit is a linear combination of at least three modulation symbols. The frame structure engine produces a control signal to a frame generator to control the generation of a frame in the frame format of the select operating mode.