The present disclosure relates to methods and systems for monitoring upstream signals and for providing the total bandwidth to a base station for analysis of any disruptions. In an example, the present methods and systems include at least a first circuit and a second circuit. The first circuit is coupled to a cable input-output port. The first circuit is configured for providing upstream signals from broadband signals of the upstream feed. The second circuit is configured for processing the upstream signals by adjusting its dynamic range to provide processed signals with an adjusted dynamic range. The second circuit is also configured for analyzing a spectrum of the processed signals and for providing information characterizing the processed signals to a processor of a modem.

A decoding circuit may include a section information generation unit suitable for generating section information corresponding to a section in which an input signal has a first value, a period information generation unit suitable for generating period information corresponding to a period of the input signal, a reference information generation unit suitable for generating reference information by dividing a value of the period information by a given value, and a comparison unit suitable for determining a logic value of the input signal by comparing the section information with the reference information.

Disclosed is a microwave cavity resonator used as a phase change (phase modulation) to intensity change (intensity or amplitude modulation) converter. Certain aspects and embodiments include resonant circuits, such as a resistor, inductor and capacitor (RLC) circuit. Certain aspects and embodiments convert changes in phase to changes in output voltage to perform analog demodulation of a phase modulated microwave carrier. Certain aspects and embodiments use resonance when the reactive components of the circuit (capacitive and inductive components) are equal in magnitude and 180 degrees out of phase with one another, thereby cancelling out the reactance component of the circuit's impedance.

Low power radio frequency (RF) receivers and related circuits are described.

Low power radio frequency (RF) receivers and related circuits are described.