Abstract: A wireless communication system includes a power amplifier (PA) configured to receive a radio frequency (RF) input signal and to produce a PA output signal, the PA output signal being an amplified version of the RF input signal. A sensor subsystem is configured to perform asynchronous statistical sampling of the RF input signal and of the PA output signal and to generate a sensor subsystem output. A controller, in communication with the sensor subsystem, is configured to obtain the sensor subsystem output and to infer performance of the PA, and may control one or more of a plurality of internal PA parameters. The controller may include a neural network processor to associate a particular statistical input/output characterization with a particular inferred performance for the PA. Compared to known approaches, the system is scalable and achieves lower power consumption, and is configured to obtain information about linearity performance.

Abstract: A vehicle bumper ram guard assemblies for wheeled vehicles which are used to push other vehicles or objects. Each ram guard assembly comprising an upright elongate ram cylinder made of impact absorbent material and rotatably mounted on a U bracket which is in turn secured to the pushing vehicle's structure. Preferably the ram cylinder apart from being rotatable is also vertically movable so as to dissipate and minimize frictional forces on the object being pushed. A non-abrasive cover may cover the ram cylinder to further minimize frictional forces and consequent damage to the object being pushed.