A method for processing an electrical signal comprises receiving an electrical signal comprising a frequency modulated signal encoding digital data; sampling a first portion of the electrical signal to obtain a plurality of samples to obtain a first sample set; determining an index value from the first sample set by assigning a value to each sample in the first sample set based upon an amplitude of the sample; comparing the determined index value with a plurality of predetermined index values to identify a first output value from a plurality of predetermined output values, each of the predetermined index values corresponding to one of the plurality of predetermined output values; and outputting an indication of the output value. Each of the predetermined output values indicates a respective frequency modulation encoded value and the first output value indicates a frequency modulation encoded value within the first portion of the electrical signal.

A single channel receiver includes an input terminal that receives an analog input signal, a mixer that down-mixes the analog input signal by use of a phase- and/or frequency-corrected oscillator frequency signal and shifts complex-valued information contained in the analog input signal to the real part (or alternatively to the imaginary part) to obtain an intermediate real-valued analog signal, an analog-to-digital-converter that converts the intermediate analog signal into an intermediate digital signal, a demodulator that demodulates the intermediate digital signal into a digital output signal, a phase tracking loop that detects zero-crossings in the intermediate digital signal to obtain phase error information representing a phase error in the intermediate digital signal, and an oscillator that generates the phase- and/or frequency-corrected oscillator frequency signal by compensating the phase and/or frequency error in the intermediate digital signal by correcting the phase of the oscillator frequency signal with the phase error information.

A method of, and apparatus for, demodulating a frequency-modulated signal. The method comprises: for each of a plurality of templates, performing a respective cross-correlation operation between the template and data representative of the frequency-modulated signal, each template comprising data representative of a signal that is frequency-modulated with predetermined preamble data using a different respective modulation index; generating frequency-offset data from one or more of the cross-correlation operations, the frequency-offset data being representative of a difference between a reference frequency and a carrier frequency of the frequency-modulated signal; determining a respective peak correlation-coefficient value from each of the cross-correlation operations; identifying a highest peak correlation-coefficient value in the determined peak correlation-coefficient values; determining a modulation index estimate in dependence on which template produced the highest peak correlation-coefficient value; and using the frequency-offset data and the modulation index estimate to demodulate at least a portion of the frequency-modulated signal.

A method of, and apparatus for, demodulating a frequency-modulated signal. The method comprises: for each of a plurality of templates, performing a respective cross-correlation operation between the template and data representative of the frequency-modulated signal, each template comprising data representative of a signal that is frequency-modulated with predetermined preamble data using a different respective modulation index; generating frequency-offset data from one or more of the cross-correlation operations, the frequency-offset data being representative of a difference between a reference frequency and a carrier frequency of the frequency-modulated signal; determining a respective peak correlation-coefficient value from each of the cross-correlation operations; identifying a highest peak correlation-coefficient value in the determined peak correlation-coefficient values; determining a modulation index estimate in dependence on which template produced the highest peak correlation-coefficient value; and using the frequency-offset data and the modulation index estimate to demodulate at least a portion of the frequency-modulated signal.

The present technology relates to a transmission device and method as well as a reception device and method which can suppress the influence of interference. The transmission device sets different methods of changing the frequency of the chirp modulation for each of first information and second information different from the first information. The transmission device transmits the chirp-modulated first information or second information in accordance with the set frequency change method. The present technology can be applied to a wireless communication system.

The present technology relates to a transmission device and method as well as a reception device and method which can suppress the influence of interference. The transmission device sets different methods of changing the frequency of the chirp modulation for each of first information and second information different from the first information. The transmission device transmits the chirp-modulated first information or second information in accordance with the set frequency change method. The present technology can be applied to a wireless communication system.

An automotive Ethernet physical-layer (PHY) transceiver includes an analog Front End (FE) and a digital processor. The FE is configured to receive an analog Ethernet signal over a physical Ethernet link while the Ethernet PHY transceiver is operating in a vehicle, and to convert the received analog Ethernet signal into a digital signal. The digital processor is configured to hold one or more noise profiles that characterize respective predefined noise types of noise signals that are expected to corrupt the received analog Ethernet signal, to classify an actual noise signal present in the digital signal into one of the noise types, using the noise profiles, and in response to deciding that the actual noise signal matches a given noise type among the predefined noise types, to apply a noise mitigation operation selected responsively to the given noise type.

A communication signal demodulation apparatus demodulates a communication signal to generate an output signal. The communication signal demodulation apparatus includes: plural sensor circuits which sense different electrical characteristics of one same communication signal and generate corresponding sensing modulation signals respectively; plural processing filters which filter the corresponding sensing modulation signals respectively and generate corresponding filtered modulation signals respectively; plural demodulators which demodulate the plural filtered modulation signals and generate corresponding demodulation signals respectively, wherein each of the filtered modulation signals corresponds to at least one of the demodulators; and a determination circuit which receive the plural demodulation signals, determine whether each unit signal of each of the demodulation signals is correct or not according to a determination mechanism, and combine one or more correct unit signals to generate the output signal.

A communication signal demodulation apparatus demodulates a communication signal to generate an output signal. The communication signal demodulation apparatus includes: plural sensor circuits which sense different electrical characteristics of one same communication signal and generate corresponding sensing modulation signals respectively; plural processing filters which filter the corresponding sensing modulation signals respectively and generate corresponding filtered modulation signals respectively; plural demodulators which demodulate the plural filtered modulation signals and generate corresponding demodulation signals respectively, wherein each of the filtered modulation signals corresponds to at least one of the demodulators; and a determination circuit which receive the plural demodulation signals, determine whether each unit signal of each of the demodulation signals is correct or not according to a determination mechanism, and combine one or more correct unit signals to generate the output signal.

Apparatuses and methods related to digital mobile radio (DMR) with enhanced transceiver are disclosed herein. The transceiver detects waveforms of signals received by a digital mobile station radio (MS). By detecting whether the waveforms of the signals, the transceiver allows a digital baseband processor of the MS to remain in a sleep state while the signals are being detected by the DMR, thereby reducing an amount of power used while the signals are being detected.