Abstract: The use of complex analysis enables enable various new methods and strategies for the identification of a RF transmission source in a radar detector. The incoming signal (13) is processed using complex signal representations (I, Q), allowing for the recognition of signal patterns in the radio spectrum which may be hidden by conventional methods using only demodulation of signals which are in-phase with a local oscillator. The additional signal information can aid in overcoming signal and noise discrimination challenges faced by radar detectors using traditional band-limited, scalar sampling strategies, including the challenge of discriminating between police radar signals and other radar sources that utilize signals in the same frequency ranges (e.g., radar door openers, traffic sensors, vehicle-based collision avoidance, cruise control, blind spot monitor emitters).

Abstract: A radar detector (10) comprises a radar receiver (12) for receiving and characterizing the signal characteristics of a radar signal and providing one or more of radar frequency, radar intensity and radar direction to a control system (13) which comprises a neural network (42) structured in multiple layers, each layer processing signal characteristics delivered thereto to develop neural pathways associated with the distinguishing signatures of the signal characteristics provided to the neural network. The network thus distinguishes law enforcement-originated and non-law enforcement-originated radar signals in an adaptable manner that does not rely upon traditional logic programming of the detector system. Training, deployment and further learning and retraining of the neural network are described, as is the use of multiple and disparate vehicle environment and operation signals.

Abstract: A blanking device generates a blanking signal to obscure signals on a license plate in response to a monitoring flash directed at the license plate. The device includes at least two sensors spaced apart to enable the device to differentiate between a monitoring flash from a device attempting to take an image of the license plate and other spurious signals.

Abstract: A license plate assembly includes a frame receiving a conventional license plate and at least one blanking flash generator arranged to generate a blanking flash at the license plate in response to a monitoring flash from an external monitoring device. The monitoring device is designed to take an image of the license plate and the blanking flash is obscuring the license plate to prevent or interfere with the taking of the image.

Abstract: A license plate assembly includes a frame receiving a conventional license plate and at least one blanking flash generator arranged to generate a blanking flash at the license plate in response to a monitoring flash from an external monitoring device. The monitoring device is designed to take an image of the license plate and the blanking flash is obscuring the license plate to prevent or interfere with the taking of the image.