Abstract: Methods, systems, and devices are described for hierarchical communication of a set of source data over a communication link. Sets of representation data may be generated by applying precoding schemes to a set of source data. The sets of representation data may be associated with coding and modulation schemes of varying order. Based on certain link conditions, the sets of representation data may be adaptively coded and modulated, using their associated coding and modulation schemes, for transmission over a communication link.

Abstract: A well logging instrument and method that remove vibration induced noise from the output of a detector including a scintillation crystal. The invention is based on a realization that pulses induced by vibration during MWD operations are characteristically periodic, whereas pulses generated down hole by gamma rays occur at random intervals and are characteristically non-periodic. The instrument and method involve positioning a scintillation crystal package in the high vibration environment for interaction with incident radiation, using a light sensing device to convert photons received from the scintillation crystal package into an electrical signal which over time is composed of radiation induced events that are non-periodic and vibration induced events that are periodic, distinguishing the periodic events using a time history of the electrical signal, and removing the periodic events from the electrical signal to provide a corrected electrical signal from which vibration induced components have been removed.