A wireless communication system includes a first device having a communications control circuit configured to initiate transmission of a wireless communication signal, and a second device including a communication interface circuit and a number of other circuits. When a normal print operation is performed, a different drive timing is applied to each of the plurality of print heads based on the stored information, thereby compensating for the difference between the one or more characteristics of the print heads. The assembly of materials are then pressed to bond the polyvinylidene fluoride film to the copperclad polyimide film and to form an assembly. The stopper member has a base portion which has a second engagement portion that can be engaged with the first engagement portion and can be moved along the document transport direction while being guided by the groove, and a vertical portion projecting perpendicular from the base portion. The actuator comprises at least one free space adjacent to the elastomer material zones in a direction orthogonal to the actuating axis. At least one embodiment includes searching a MIMO detection tree, the detection tree configuration being formed by a plurality of nodes and a plurality of leaves connected via a plurality of branches, the computational complexity associated with computing a node metric decreases with the node depth in the tree configuration and providing an estimate on a transmitted signal.