Provided is a contactless power receiving unit which has a simple configuration, and which is capable of generating constant induced electromotive force regardless of the orientation of a power receiving coil. Advantageously, low-volume consumption, rapid low-cost fabrication of molds with easily interchangeable microfluidic channel layouts, mass production, and in situ label-free real-time detection of cellular response, viability, behavior and biomolecular binding using plasmonic techniques can be provided. Systems and methods are also disclosed in which a control over the precision of messages sent or received andor a change in the scaling of these messages may be implemented in the LDPC decoder. Accordingly, the observation field of view is moved by tilting the mirror.