| Entries |
| Document | Title | Date |
|---|
| 20080233910 | METHOD AND SYSTEM FOR MITIGATING RECEIVER SATURATION DURING SIMULTANEOUS FM TRANSMISSION AND RECEPTION - Aspects of a method and system for mitigating receiver saturation during simultaneous FM transmission and reception may include detecting a power of an RF signal received at an antenna. A power of one or more baseband signal components corresponding to the RF signal may be determined. A power of signals transmitted via the antenna may be controlled, based on a cost function derived from at least the detected RF signal power received and/or the determined power of the one or more baseband signal components. One or more of the baseband signal components may be an in-phase signal, a quadrature signal or both an in-phase signal and a quadrature signal associated with a same carrier frequency. In one embodiment of the invention, the radio frequency signal may be an intermediate frequency (IF) radio signal. | 09-25-2008 |
| 20080233911 | METHOD AND SYSTEM FOR UTILIZING A POWER SOURCE AS AN FM ANTENNA FOR AN INTEGRATED FM RADIO - Aspects of a method and system for utilizing a power source as an FM antenna for an integrated FM radio are provided. In this regard, aspects of the invention may enable reception of FM radio signals via an external component coupled to a power port of a communication device. In this regard, an external component may act as an antenna for the reception of FM radio signals. Additionally, a device may be enabled to determine whether to use a connected external component or use an antenna within the device based on the power levels of FM radio signals received via each. An inductor may be utilized in order to enhance the resonance of the external component at FM radio frequencies. Additionally, an output impedance of a device may be matched to an external component via a configurable matching network. | 09-25-2008 |
| 20080261548 | SYSTEM AND METHOD FOR SELECTING AN INTERMEDIATE FREQUENCY - A receiver including a mixer configured to generate a mixed signal at a first intermediate frequency from an input signal and a mixing signal and processing circuitry configured to detect a power level for each of a plurality of possible images in the mixed signal and configured to cause the mixer to generate the mixed signal at a second intermediate frequency that differs from the first intermediate frequency and corresponds to an image frequency of one of the plurality of possible images with a lowest of the power level is provided. | 10-23-2008 |
| 20080274708 | Multi-frequency detector - The method provides a method and device for detecting in a single or multi frequency signal, one or more frequencies from a predetermined set of frequencies. The Signal is subjected to a complex filter substantially passing all of the frequencies in the predetermined set of frequencies. For each of one or more pairs of members of the complex filtered signal, a complex number Y | 11-06-2008 |
| 20080274709 | WIRELESS COMMUNICATION APPARATUS - A wireless communication apparatus for demodulating modulated information which is transmitted from a wireless tag so as to read out the modulated information, includes: an antenna which transmits a transmission signal to the wireless tag and receives a signal transmitted from the wireless tag as a reception signal; a demodulator which demodulates the reception signal to output a demodulated signal; a signal output unit which outputs a proportional signal proportional to the transmission signal; and a controller which calculates the proportional signal and the demodulated signal to output an calculated signal, and calculates the calculated signal and the reception signal. | 11-06-2008 |
| 20090004984 | ENHANCED FREQUENCY DOMAIN SPREADING - A system and method are provided for using frequency domain spreading to generate real signals in the time domain. The method supplies a first complex frequency domain symbol (α) and a second complex frequency domain symbol (α | 01-01-2009 |
| 20090023409 | Receiving device - A waveform shaping circuit wave-shapes a demodulated signal after FM demodulation to generate a binary value. A smoothing circuit smoothes the demodulated signal to generate a reference voltage. A comparator compares the reference voltage with the demodulated signal to output the binary value. A potential difference limiting circuit determines whether a potential difference between the demodulated signal and the reference voltage exceeds a set voltage. When the potential difference exceeds the set voltage, the potential difference is controlled to a value less than the set voltage. At the initiation of signal reception or after a jamming signal stops, the reference voltage follows the demodulated signal, thus allowing data reception to rapidly begin. | 01-22-2009 |
| 20090036076 | SECURITY SYSTEM WITH DYNAMIC RANGE ENHANCEMENT FOR FM DEMODULATION - A system and method for communicating between a base and a remote device in a security system. The base receives an audio signal from a telephone network via a panel and then frequency modulates the audio signal at a carrier frequency to generate an FM signal. The remote device receives the FM signal from the base, determines a phase error signal representing the phase error between the received FM signal and an output signal of a voltage controlled oscillator, determines a difference between the carrier frequency and a center frequency of the voltage controlled oscillator, and, if there is a difference, then changes the center frequency of the voltage controlled oscillator to match the carrier frequency of the FM signal. | 02-05-2009 |
| 20090036077 | SYSTEMS AND METHODS FOR PHOTONICALLY ASSISTED RF FILTERING - Systems and methods for improved photonically-assisted RF filtering. Presently, processing of wide-band RF signals involves the use of multiple specialized equipment to isolate a region of interest from the spectrum. The present invention discloses the use of a modulation system to upconvert the RF signal onto the sideband of a light source such as a laser, an optical filter sub-system comprising a plurality of filtering units that function as combinations of IIR and FIR filters, and a resonant channelizing filter for noise reduction and rejection of undesired channels, and means for control and agility of a piecewise coherent optical filter. The resulting filtered RF signal may then be downconverted to the electrical domain for further signal processing. | 02-05-2009 |
| 20090054023 | AUDIO AMPLIFIER AND METHODS OF GENERATING AUDIO SIGNALS - Audio amplifiers and methods of generating audio signals are disclosed. A disclosed example amplifier comprises a first driver to receive a first signal; a second driver to receive a second signal; a configurable signal delivery circuit; and a mode selector in communication with the first and second drivers to selectively configure the signal delivery circuit in a voltage boost mode or a voltage buck-boost mode based on a characteristic of the input signal. | 02-26-2009 |
| 20090061802 | RECEIVER HAVING MULTIPATH EQUALIZER - An FM receiver includes a receiving unit that receives a signal from a broadcasting station and outputs a receiving signal, an equalizer that equalizes the receiving signal by using a calculated weight, and obtains an equalized output signal, a demodulator that demodulates the equalized output signal to reproduce the signal from the broadcasting station, a detection unit that observes size of the calculated weight to detect a capture state with respect to an undesired broadcasting station and generates a capture detection signal, and a weight setting unit that sets the calculated weight with respect to the equalizer at a steady state, and sets a specific weight for temporarily setting the equalizer in a through state when the capture detection signal is generated. | 03-05-2009 |
| 20090088109 | Circuit Arrangement for Processing a Radio-Frequency Signal - Described herein is a circuit arrangement for processing a radio-frequency signal. | 04-02-2009 |
| 20090156146 | DUTY-TO-VOLTAGE AMPLIFIER, FM RECEIVER AND METHOD FOR AMPLIFYING A PEAK OF A MULTIPLEXED SIGNAL - A FM receiver comprises an IF filter, a demodulator and a decoder. The IF filter generates an RSSI and a FM modulated signal in response to a FM signal. The demodulator comprises a duty-to-voltage amplifier for amplifying a peak of a MPX signal. The duty-to-voltage amplifier comprises a current source, a switch and a current splitter. The current source generates a current. The switch controls a flow of the first current in response to a PWM signal. The current splitter splits the flow of the current into a sub-flow in response to the RSSI. The peak of the MPX signal is proportional to the sub-flow. The decoder receives the MPX signal to generate an audio signal to play sound. | 06-18-2009 |
| 20090280762 | HIGH-ORDER HARMONIC REJECTION MIXER USING CURRENT STEERING TECHNIQUE - A mixer includes, an input current generation unit generating an input current; a first path circuit unit including n number of transistors having sources connected in common to an output node of the input current generation unit; and a second path circuit unit including n number of transistors having sources connected in common to the output node of the input current generation unit, and respectively corresponding to the n number of transistors included in the first path circuit unit. Local oscillator signals sequentially phase-shifted by 180°/n are individually input to gates of the n number of transistors included in the first path circuit unit, and local oscillator signals having opposite phases to the local oscillator signals input to the gates of the corresponding transistors included in the first path circuit unit are individually input to gates of the n number of transistors included in the second path circuit unit. | 11-12-2009 |
| 20090280763 | METHOD FOR DEMODULATING A MODULATED SIGNAL, DEMODULATOR AND RECEIVER - A demodulator ( | 11-12-2009 |
| 20090298453 | Combining multiple frequency modulation (FM) signals in a receiver - In one embodiment, the present invention provide a method for detecting signal quality metrics of a constant modulo (CM) signal received in two different signal paths, and combining the signal from the two signal paths based at least in part on the detected first and second signal quality metrics. Such method may be implemented in a radio receiver such as an automobile receiver. | 12-03-2009 |
| 20090311983 | Method and Apparatus for Storing Frequencies - A method, in a wireless communications apparatus, the method comprising: identifying a previously used frequency as incompatible with a parameter storage area; performing an arithmetical operation on the value of the previously used frequency to give a modified value of the previously used frequency; and storing the modified value of the previously used frequency in the parameter storage area. | 12-17-2009 |
| 20090311984 | FM Band Availability Based on GPS - Methods and apparatus for determining an available FM frequency channel for interfacing with FM modulated output signals from a wireless device are described herein. A SPS receiver, such as a GPS receiver, can determine its position based on conventional techniques. The SPS receiver can determine one or more available FM channels over which audio output may be transmitted. The SPS receiver can use the determined position to access a local data base of available channels. Alternatively, the SPS receiver can use the determined position to access a local database of allocated channels in order to determine one or more available channels. The SPS receiver may display a prompt or message that indicates an FM channel over which output audio is modulated. | 12-17-2009 |
| 20090325524 | METHOD AND AN APPARATUS FOR PROCESSING AN AUDIO SIGNAL - A signal processing apparatus and method thereof are disclosed. The present invention includes receiving a low frequency downmix signal including a multi channel signal, phase shift information and spatial information corresponding to parameter band of the low frequency downmix signal, generating the multi channel signal by applying the spatial information based on the parameter band to a whole frequency downmix signal, generating estimated phase shift information of a parameter band by using the phase shift information, and generating a phase shift multi channel signal by shifting a phase of the multi channel signal based on the phase shift information and the estimated phase shift information. | 12-31-2009 |
| 20090325525 | RECEIVER AND METHOD OF REDUCING OPERATING CURRENT THEREOF - Disclosed is a receiver so adapted that even it receives a signal having the same communication frequency and frequency band as its own, restart of a receive-signal processor is inhibited for a fixed period of time if the receive signal is not a desired signal. The result is a reduction in power consumption. The receiver includes a start circuit for detecting a radio-frequency signal and outputting a start signal if a level of the detected radio-frequency signal is no less than a fixed level, and a receive-signal processor for receiving the start signal and starting a demodulating operation for demodulating the radio-frequency signal. The receive-signal processor includes a demodulator for reconstructing a demodulated signal from the radio-frequency signal, and a restart-inhibit controller for determining whether the demodulated signal is a desired signal and, if the demodulated signal is not a desired signal, outputting a restart-inhibit signal to the start circuit and causing the start circuit to inhibit output of the start signal for a fixed period of time. | 12-31-2009 |
| 20100003937 | Receiver Device, System, and Method for Low-Energy Reception of Data - A receiver device, A system and a method for reception of a signal having an amplitude that has been modulated with information, wherein a resistive element is provided that converts an electrical quantity into a physical parameter. | 01-07-2010 |
| 20100069030 | FREQUENCY MEASURING BROADBAND DIGITAL RECEIVER - A microwave receiver configured for measuring the frequency F of a microwave signal received by the receiver, in a band of frequencies whose maximum frequency is Fmax. The receiver comprises N frequency measuring digital stages E | 03-18-2010 |
| 20100093297 | FM RECEIVER - FM receiver including an RF input circuit followed by a tunable mixer stage for frequency conversion of an RF FM signal into an IF FM signal, which is coupled to an FM input of a first narrow-band IF filter. The center frequency of the first narrow-band IF filter is controlled to vary in dependence on the IF FM signal. The first narrow-band IF filter is subsequently coupled to a first FM demodulator and a first LF signal processing unit. To increase the receiver's selectivity and sensitivity without adversely affecting tracking stability, the FM input of a first narrow-band IF filter is coupled through a second FM demodulator to a control input of said first narrow-band FM tracking filter for a feed forward tracking control of the center frequency of said first narrow-band FM tracking filter with the momentary frequency of the IF FM signal. | 04-15-2010 |
| 20100120388 | WIRELESS RECEIVER - A wireless receiver that includes a reception unit which, in the case in which the frequency bandwidth of the chunk is Fc, receives a) data to which phase rotation for controlling the maximum delay time between the plurality of transmission antennas is added so that the maximum delay time is set to either a predetermined first value which is smaller than 1/Fc or a predetermined second value which is larger than 1/Fc depending on whether transmission is performed using frequency diversity or transmission is performed using multi-user diversity and b) pilot channels corresponding to the plurality of transmission antennas which are orthogonal to each other; and a demodulating unit which demodulates the data based on transfer functions calculated using the pilot channels. | 05-13-2010 |
| 20100136937 | Polar Feedback Receiver for Modulator - This disclosure relates to linearization in polar modulators of wireless communication devices, to attain linear amplification and high power efficiency during transmission. | 06-03-2010 |
| 20100144296 | Carbon Nanotubes for Wireless Communication and Radio Transmission - Described herein are systems and methods in which a carbon nanotube (CNT) is used as a demodulator of amplitude-modulated (AM) signals. Due to the nonlinear current-voltage (I-V) characteristics of a CNT, the CNT induces rectification of an applied RF signal enabling the CNT to function as a demodulator of an amplitude-modulated (AM) RF signal. By properly biasing the CNT such that the operating point is centered on the maximum portion of the I-V curve, the demodulation effect of the CNT can be maximized. The present invention is useful for possible nanoscale wireless communications systems, e.g., nanoscale radios. | 06-10-2010 |
| 20100144297 | COMMUNICATION DEVICE AND COMMUNICATION METHOD - A communication device and a communication method capable of implementing high-speed and high-quality communication processing such as handover. A mobile communication terminal is configured such that, in cases where it is judged by a power measurement unit that a reception signal received by a communication unit is equal to or less than a predetermined value, a frequency conversion unit performs computation by expanding a frequency range for performing time/frequency conversion with respect to the received reception signal. Further, a frequency measurement unit measures reception strength of reception signals in the expanded frequency range, and detects a frequency of, among the measured signals, a signal with a reception strength higher than a predetermined reception strength, and the communication unit executes connection processing by using the signal of this frequency. | 06-10-2010 |
| 20100144298 | APPARATUS AND METHOD FOR GENERATING IN-PHASE SIGNAL AND QUADRATURE SIGNAL OF MULTI-PORT NETWORK - Provided is an apparatus and method for generating I/Q signals in a multi-port network, which can generate I/Q signals with accurate coordinates and sizes by repeatedly controlling the coordinates and size of an initial parameter in accordance with a predetermined reference condition. The I/Q signal generating apparatus of a multi-port network includes a multi-port network unit, a signal generation unit, and a control unit. The multi-port network unit converts a receive (RX) signal into a plurality of phase signals with different phases in accordance with a predetermined reference signal. The signal generation unit restores original data on the basis of the power of the phase signals received from the multi-port network unit. The control unit controls the restoration operation of the signal generation unit to be repeated so that the original data restored by the signal generation unit satisfies a predetermined reference range. | 06-10-2010 |
| 20100159861 | DELTA-THETA FREQUENCY ESTIMATION - Systems, devices, processors, and methods are described which may be used for the reception of a wireless broadband signal at a user terminal from a gateway via satellite. A physical layer header may be identified, the header including a number of subcode blocks. A phase may be estimated for each of the subcode blocks, and intra-header phase differences may be calculated. The intra-header phase differences may be used to calculate a frequency error, which may be corrected. Frequency errors may be monitored and, when such errors fall below a threshold level, an alternative inter-frame frequency error tracking method may be used. | 06-24-2010 |
| 20100184396 | CONFIGURABLE ALL-DIGITAL COHERENT DEMODULATOR SYSTEM FOR SPREAD SPECTRUM APPLICATIONS - A configurable all-digital coherent demodulator system for spread spectrum digital communications is disclosed herein. The demodulator system includes an extended and long code demodulator (ELCD) coupled to a traffic channel demodulator (TCD) and a parameter estimator (PE). The demodulator also includes a pilot assisted correction device (PACD) that is coupled to the PE and the TCD. The ELCD provides a code-demodulated signal to the TCD and the PE. In turn, the TCD provides a demodulated output data signal to the PE. The PACD corrects the phase error of the demodulated output data based on an error estimate that is fed forward from the PE. Accumulation operations in the ELCD, TCD, and PE are all programmable. Similarly, a phase delay in the PACD is also programmable to provide synchronization with the error estimate from the PE. | 07-22-2010 |
| 20100291890 | RECEIVER - A receiver including an amplifier module, a control unit, a mixer and an IF amplifier is provided. The amplifier module, including multiple amplifier units with different gains, amplifies an input signal. The control unit enables at least one of the amplifier units according to a gain control signal, wherein the enabled at least one amplifier unit generates an output RF signal in response to the input signal. The mixer coupled with each amplifier unit in series down-converts the output RF signal into an IF signal according to a local oscillation frequency. The IF amplifier having a variable gain is coupled to the mixer for amplifying the IF signal to an output signal according to the gain control signal. The control unit obtains the gain control signal according to the output signal and a reference signal. | 11-18-2010 |
| 20100291891 | IMPROVEMENTS IN OR RELATING TO RADIO RECEIVERS - A radio receiver comprises an input ( | 11-18-2010 |
| 20100297972 | ANTENNA ARRANGEMENT WITH REDUCED COMM-MODE SIGNALS - In one embodiment of the present invention, an antenna arrangement apparatus includes a dipole reception antenna including a first pole portion and a second pole portion. A length of coaxial cable is provided and constitutes a feedline, the length of coaxial cable including a proximal end with respect to the first and second pole portions. The proximal end of the length of coaxial cable is coupled to the first and second pole portions via a common-mode filter. | 11-25-2010 |
| 20100317306 | DIVERSITY ANTENNA SYSTEM AND METHOD UTILIZING A THRESHOLD VALUE - An antenna system for receiving an RF signal from a first antenna and a second antenna includes a phase shift circuit. The phase shift circuit shifts a phase of the RF signal from the second antenna by one of a plurality of possible phase shifts to produce a phase shifted signal. A combiner combines the RF signal from the first antenna and the phase shifted signal to produce a combined signal. A comparator circuit compares a signal quality of the combined signal with a minimum threshold value to determine if the signal quality of the combined signal is equal to or greater than the threshold value. The comparator circuit is in communicative control of the phase shift circuit and maintains the phase shift of the RF signal received by the second antenna in response to the signal quality of the combined signal being equal to or greater than the threshold value. | 12-16-2010 |
| 20110053535 | WIRELESS COMMUNICATION APPARATUS - A wireless communication apparatus includes an analog receiving unit, a phase calculator, a time variation calculator, and a chirp radar determination unit. The analog receiving unit obtains a receiving signal from a radio wave. The phase calculator calculates a phase of the receiving signal. The time variation calculator calculates a frequency of the receiving signal based on the phase. Moreover, the time variation calculator further calculates a time variation of the frequency. The chirp radar determination unit determines whether the receiving signal is a chirp radar or not based on the time variation. | 03-03-2011 |
| 20110230154 | SINGLE CARRIER COMMUNICATION IN DYNAMIC FADING CHANNELS - Briefly, in accordance with one or more embodiments, in response to receiving a single carrier signal that is not phase locked, channel equalization may be applied to the signal via a channel equalizer. The equalized signal may be phase averaged to provide a signal that is at least partially phase stabilized. The channel equalizer may then be trained by feeding back the at least partially phase stabilized phase reference to the channel equalizer. The resulting signal may then be decoded via coherent or quasi-coherent detection. | 09-22-2011 |
| 20110275338 | PHASE PULSE SYSTEM AND METHOD FOR BANDWIDTH AND ENERGY EFFICIENT CONTINUOUS PHASE MODULATION - A new pulse shape for CPM is introduced which is obtained by a linear combination of well-known RC and REC pulse shapes. The new pulse shape addresses the tradeoff between the width of the PSD main lobe and the rate of decay of the side lobe to improve the coded performance of multi-carrier systems affected by ACI. Also, a methodology is proposed to design and evaluate the performance of the new pulse shape for multi-carrier, coded systems based on the modulation constrained capacity. Furthermore, a binary convolutional code and the CPM modulator are concatenated using an S-random bit interleaver to lower the error floor. Finally, Laurent representation of the new pulse shape is suggested such that by retaining only the principal pulses at the receiver, complexity of the receiver can be reduced. | 11-10-2011 |
| 20110319042 | Integrated Radio Frequency Front-end Circuit - An integrated RF front-end circuit comprising a balun, a receiver amplifier, a power amplifier, and a selector circuit is provided. The balun comprises a center-tapped inductor having a first node, a center-tap switchlessly coupled to a fixed voltage, and a second node. The balun receives a single-ended signal through the first node to produce a differential signal at the first and second nodes. The differential signal is provided to balanced input lines of the receiver amplifier. Balanced output lines of the power amplifier provide a differential signal to the first and second nodes. The balun converts the differential signal to a single-ended signal. The single-ended signal is available at the first node of the center-tapped inductor. The selector circuit activates the receiver amplifier and deactivates the power amplifier, and vice versa. The power amplifier may comprise only a single-ended output line connected to either the first or the second node. | 12-29-2011 |
| 20120171977 | ANTENNA DIVERSITY SCHEME EMPLOYING BAND PASS SAMPLING AND FAST SEMICONDUCTOR SWITCHING - A vehicle or other host station includes first and second antennas, a fast semiconductor switch, a switching controller, and an RF receiver. The controller toggles the switch at a calibrated switching rate to selectively and alternately connect the first antenna to one of the RF receiver and a load having a calibrated impedance value. The first antenna may be a parasitic element in any embodiment using the load. The semiconductor switch may be a CMOS device or a Gallium Arsenide semiconductor switch. A switching control method for use in a vehicle or other host station having the first antenna, the second antenna, and the RF receiver includes transmitting a switching signal from the controller to the switch, and toggling the switch at a calibrated switching rate in response to the switching signal to selectively and alternately connect the first antenna to one of the RF receiver and the load. | 07-05-2012 |
| 20120178392 | APPARATUS AND METHOD FOR ADAPTIVE I/Q IMBALANCE COMPENSATION - An I/Q imbalance compensation block of a RF receiver for compensating an imbalance between an in-phase component and a quadrature component of an RF signal is disclosed. The compensation block includes a conjugation block; an adaptive finite impulse response (FIR) filter; and an adder. The filter use filter coefficients iteratively updated at least partly in response to a compensated digital signal. The filter can have a complex number for at least one, but not all of filter taps, and real numbers for other filter taps. The filter can be provided with adaptation step sizes different from filter tap to filter tap. The filter can also be provided with an adaptation step size(s) varying over time. The filter can also be provided with an adaptation step size(s) divided by the square norm of the compensated signal. | 07-12-2012 |
| 20120220250 | SIGNAL RECEIVING DEVICE AND SIGNAL RECEIVING METHOD - A signal receiving device and signal receiving method to pass a desired frequency component of an intermediate frequency signal by using an IF filter without increasing a chip area. The signal receiving device comprises: a mixer to mix a received frequency signal with a local oscillation frequency signal to generate an intermediate frequency signal; an IF filter to pass a predetermined frequency component of the intermediate frequency signal; a controlling part which adjusts, according to a frequency band of the intermediate frequency signal, the frequency band of the IF filter, and adjust, according to a center frequency set in the IF filter that fluctuates with the adjustment, a center frequency of the intermediate frequency signal to be inputted in the IF filter; and a demodulating part to demodulate a frequency component of the intermediate frequency signal outputted after passing through the IF filter. | 08-30-2012 |
| 20130023223 | Method and System for Sharing a Single Antenna for Frequency Modulation (FM) Reception or FM Transmission and Near Field Communication (NFC) - Aspects of a method and system for sharing a single antenna for frequency modulation (FM) transmission or FM reception, and near field communication (NFC) are presented. Aspects of a system may include at least one circuit that enables, via a single antenna, simultaneous transmission of an FM signal and transmission of an NFC signal or reception of an NFC signal. | 01-24-2013 |
| 20140038539 | IMBALANCE CORRECTION IN A DEMODULATOR WITH FULL BAND SAMPLING - A method for demodulating phase quadrature modulated signals in a band of channels includes transposing the band around zero, and selecting a channel in the transposed band. A first pair of phase quadrature signals forming a first complex signal is extracted from the selected channel. A second pair of phase quadrature signals forming a second complex signal is extracted from a symmetrical channel of the selected channel. The method further includes establishing a correlation product based on the first and second complex signals, and correcting the two complex signals to make the correlation product tend towards zero. | 02-06-2014 |
| 20140073277 | INTERACTIVE ENTERTAINMENT SYSTEM - Disclosed here is an interactive audio system and a method of operating the same. In one embodiment, the interactive audio system comprises a processor and a receiving module for receiving a radio frequency (RF) carrier signal associated with a broadcast station. The audio system further comprises a memory storing computer-executable instructions, where the processing module is configured to access and execute the computer-executable instructions to perform a set of acts. The acts include shifting a frequency associated with the received RF carrier signal to an intermediate frequency (IF). The acts include demodulating the frequency shifted portion of the RF carrier signal associated with the broadcast station, the demodulation resulting in an output signal. The acts further include extracting an embedded data from the demodulated output signal, where the embedded data can be utilized to interact with a party associated the embedded data. The acts further include serving the embedded data in conjunction with the demodulated audio signal. | 03-13-2014 |
| 20140106694 | Interleaved Phase Sector Based RF Signal Decimation - Values representative of modulation signal components are extracted from a modulated signal. The modulated signal contains a modulation signal. A local clock signal is developed which correlates in time to the modulated signal and has a plurality of non-overlapping phase sectors per cycle. Signal values are acquired from the modulated signal, separately for at least one phase sector of one cycle of the local clock signal. At least two signal values from the same local clock cycle, but different phase sectors are combined to obtain at least one combined signal value representative of a modulation signal component. | 04-17-2014 |
| 20160020799 | Harmonic Reject Receiver Architecture and Mixer - Receiver architectures and methods of processing harmonic rich input signals employing harmonic suppression mixers are disclosed herein. The disclosed receivers, mixers, and methods enable a receiver to achieve the advantages of switching mixers while greatly reducing the mixer response to the undesired harmonics. A harmonic mixer can include a plurality of mixers coupled to an input signal. A plurality of phases of a local oscillator signal can be generated from a single local oscillator output. Each of the phases can be used to drive an input of one of the mixers. The mixer outputs can be combined to generate a frequency converted output that has harmonic rejection. | 01-21-2016 |
| 20160043760 | FM ANALOG DEMODULATOR COMPATIBLE WITH IBOC SIGNALS - A method includes: receiving an FM radio signal including an analog-modulated portion; digitally sampling an analog-modulated portion of the radio signal to produce a plurality of samples; using a ratio between an average magnitude and an RMS magnitude of a block of the samples to compute a signal quality metric; detecting sum and difference components of the baseband multiplex signal content; using the baseband content to produce an output signal; and blending the output signal from stereo to monaural as the signal quality metric falls below a threshold value. | 02-11-2016 |
| 20160087661 | Radio Receiver - An AM/FM radio receiver includes an AM/FM demodulation circuit that is configured to demodulate a signal that is received; a mute circuit that is configured to perform, on the signal demodulated by the demodulation unit, a mute process with a characteristic corresponding to an electric field strength of the signal that is received; a volume balance optimizing circuit configured to control a volume level of the signal after the mute process to be constant when the volume level of the signal is within a predetermined range; and a low-input attenuation circuit configured to receive an input signal of which the volume level has been controlled by the volume balance optimizing circuit and to attenuate the input signal when the volume level is lower than a predetermined level. | 03-24-2016 |
