Class / Patent application number | Description | Number of patent applications / Date published |
455214000 | With particular discriminator or detector | 12 |
20090111410 | FM receiver - The IFBPF ( | 04-30-2009 |
20090137219 | Near Field RF Communications - A near field RF communicator has an IQ demodulator ( | 05-28-2009 |
20100105345 | METHOD AND DEVICE FOR DETECTING PRESENCE OF A CARRIER SIGNAL IN A RECEIVED SIGNAL - A device receives a signal and, prior to demodulating the signal determines whether carrier is present in the received signal based on the correlation depth of the received signal. The device determines a plurality of values for the received signal that indicate the amount of correlation in the received signal and detects the presence of the carrier in the received signal as a function of the plurality of values. The plurality of values can include autocorrelation values and prediction coefficients, wherein the autocorrelation values are estimated based on an autocorrelation function derived for the received signal, and the prediction coefficients are generated using a prediction model that is derived as a function of the autocorrelation values. The prediction coefficients can be summed to generate a decision statistic that is compared to a detection threshold to detect the presence of the carrier. | 04-29-2010 |
20110250859 | Pilot Based Adaptation for FM Radio Receiver - Performing a decoding mode of a frequency modulation (FM) signal for an adaptive FM radio receiver includes passing the FM signal through a FM demodulator to obtain a composite signal that includes a pilot signal and noise around the pilot signal, passing the composite signal through a band bass filter, filtering the pilot signal from the noise using a pilot and noise separator that includes a notch filter that filters the pilot signal from the noise, obtaining average amplitudes of the pilot signal and the noise, comparing a ratio between the average amplitudes of the pilot signal and the noise with a programmable threshold, and selecting a decoding mode and an audio low pass filter. The decoding mode is selected based on a quality of the pilot signal being decoded and the audio LPF is selected based on the comparison ratio. | 10-13-2011 |
20120034891 | METHOD FOR DYNAMICALLY ADJUSTING SIGNAL PROCESSING PARAMETERS FOR PROCESSING WANTED SIGNAL AND COMMUNICATIONS APPARATUS UTILIZING THE SAME - A communications apparatus is provided. A signal processing device receives an RF signal comprising a wanted signal complying with a first wireless communications protocol from an air interface and processes the RF signal according to one or more signal processing parameter(s) to obtain the wanted signal. An interference detector analyzes one or more characteristic(s) of an interference signal of the wanted signal. The interference signal complies with a second wireless communications protocol different from the first wireless communication protocol. A coexistence optimization controller is coupled to the signal processing device and the interference detector, obtains information regarding the characteristic(s) of the interference signal from the interference detector and dynamically adjusts the signal processing parameter(s) according to the characteristic(s) of the interference signal. | 02-09-2012 |
20120329414 | FM RECEIVING DEVICE AND FILTERING METHOD - A level detection part | 12-27-2012 |
20140057582 | Robust FM Modulation Detector Using Signal Autocorrelation - An FM receiver is unaware of the modulation level (frequency deviation) of the signal and has to make an estimate of it, or some reasonable time-average of it, and accordingly set the input filter's bandwidth. We calculate modulation by measuring the autocorrelation of the recovered audio signal instead of its peaks, and then applying a peakhold detector. Since FM noise can be modeled to be somewhat uncorrelated, we can expect to get an accurate estimate of signal power while rejecting noise power substantially if we measure a one-sample delayed autocorrelation estimate. Since the above measurement is alike a power measurement, we compute its square root, gain adjust it to obtain a cleaner peak measurement, and then track these clean peaks using a leaky integrator. This gives an estimate of modulation that subdues the effect of the noise. | 02-27-2014 |
20140080434 | APPARATUS AND METHOD FOR DETECTING MICROWAVE RADIATION - An apparatus for detecting microwave signals is suggested. The apparatus comprises an antenna for sending and receiving electromagnetic waves a circuit for detecting microwave signals and the signalization stage for generating an indication signal. In addition to that a method for detecting the presence of microwave signals is proposed. The method comprises the following steps | 03-20-2014 |
20140287705 | Method for Processing a Frequency-Modulated Analog Signal and Corresponding Device - A method and corresponding device for processing a frequency-modulated analog signal are disclosed. The signal includes a number of symbols belonging to a set of M symbols respectively associated with at least one frequency of a set of M frequencies. The method includes a phase of reading each symbol of the signal that includes a sampling of a signal portion corresponding to the duration of a symbol and delivering N samples (M being less than N). M individual discrete Fourier transform processing operations are performed on the N samples. Each individual processing operation is associated with each of the frequencies. The M individual processing operations deliver M processing results. The value of the symbol can be determined from the M processing results. | 09-25-2014 |
20140335809 | METHODS, CIRCUITS, SYSTEMS AND APPARATUS PROVIDING AUDIO SENSITIVITY ENHANCEMENT IN A WIRELESS RECEIVER, POWER MANAGEMENT AND OTHER PERFORMANCES - A wireless receiver ( | 11-13-2014 |
20150072633 | Frequency Discriminator - A frequency discriminator comprising a power splitter for splitting a signal into first and second paths, wherein the first path is configured to provide a first, straight-through signal and the second path includes a frequency-dependent element, such as low-pass filter, so as to provide a second signal. The frequency discriminator further comprises a circuit configured to compare the first and second signals and generate an instantaneous frequency signal in dependence thereon. | 03-12-2015 |
20160182108 | RADIO RECEIVING APPARATUS FOR RECEIVING FREQUENCY-MODULATED RADIO SIGNAL | 06-23-2016 |