Abstract: A method, an apparatus, and a computer program is provided. The method includes: quantizing a received time-varying radio frequency signal to produce a series of digital values; maintaining a plurality of data groups, each data group including a cumulative parameter and each data group being defined by a digital value range, wherein maintaining the plurality of data groups includes updating a cumulative parameter for a data group, from the plurality of data groups, when a digital value, from the series of digital values, is within the digital value range for that data group; and processing at least some of the cumulative parameters of the data groups to determine whether the received time-varying radio frequency signal originated from lightning.

Abstract: The exemplary embodiments of this invention describe a method for determining context information using EMI patterns. The method includes determining emitter information of a measured interference signal. A context is determined based upon the emitter information. Determining the interference signal emitter may also include comparing the measured interference signal to known interference signals. At least one setting of a device may be changed based upon the determined context. Various embodiments of apparatus are also described.