Abstract: A multi-signal connector includes a first tuner, a first demodulator, a first radio frequency signal pin, a first ground signal pin and digital signal pins, and the first radio frequency signal pin transmits a first radio frequency signal. The first tuner receives the first radio frequency signal and outputs a first digital signal. The first demodulator receives the first digital signal and outputs an MPEG signal via the digital signal pins. The ground signal pin is disposed between the first radio frequency signal pin and the digital signal pins for reducing the interference and noise between the first radio frequency signal and the MPEG signal. A digital signal processing system is also disclosed.

Abstract: A method of dynamically setting tuning parameters and a radio receiver are provided. The method includes the step of storing one or more tuning parameters for each of a plurality of geographic locations. The method also includes the steps of determining a current geographic location of the radio receiver, and the step of selecting one or more tuning parameters for the determined geographic location. The method further includes the step of dynamically adjusting the tuner based on the select one or more tuning parameters.

Abstract: The present invention eliminates the need for an anti-aliasing filter in a receiver that employs an analog-to-digital converter. By maintaining a predetermined relationship between a local oscillator frequency and the sampling frequency of the analog-to-digital converter, aliasing that would normally occur in the desired pass band is avoided. More specifically, the frequency of the periodic signal provided to the mixer is an integer multiple of half the sampling rate of the analog-to-digital converter. In a preferred, non-limiting example embodiment, the sampling rate of the analog-to-digital converter FADC and the frequency of the local oscillator FLO are related by the following: FLO=n*FADC/2, where n is any positive integer.

Abstract: A highly integrated GPS RF Front End which uses a single conversion stage employs an image rejection mixer stage to eliminate the need for an image reject RF bandpass filter. Also a relatively high sample rate A/D is employed which allows a timeless monolitic IF Filter to be used. The disclosure also discusses a GPS Front End topology that is easily integrated from industry standard building blocks. With the broad variation in potential receiver designs, the present invention includes some specific receiver topologies that lend themselves to a high level of integration. The specific designs presented here are comprised of industry standard building blocks and functions that have been described elsewhere in the related art.

Abstract: A receiver contains a demodulator system that can deliver a stream of digital data comprising at least a first and a second set of audio data. In a first time interval, a memory is used to store either the first or the second set of audio data. In a subsequent time interval, the demodulator system delivers another stream of digital data. A user can select either the stored audio data or the another stream of digital data. The selected data is converted to analog audio signals.

Abstract: A wireless audio distribution system may have a wireless transmitter, responsive to a plurality of audio input channels, for transmitting signals carrying the audio, a receiver, responsive to the transmitted signals for selecting one or more of the audio input channels to be reproduced in accordance with local setting selectors at the receiver. An additional audio source, such as a microphone, can be selectively used by for example the driver to talk on the cell phone or to make announcements to passengers via the wireless audio distribution system in accordance with a master settings selector which may be used to override local settings such as audio channel or volume selection.

Abstract: In a CDMA receiver, the TFCI decoding error is reduced. When the difference between TFCI correlation values is small and hence TFCI candidates are less credible, data is decoded using transport format information according to a plurality of TFCI having a high TFCI correlation value to select an appropriate TFCI using to a CRC judge result. Data is decoded according to the appropriate TFCI and is sent to the higher layer. Therefore, data decoded according to correct transfer format information can be reported to the upper layer. This resultantly keeps high utilization efficiency of finite wireless resources.

Abstract: A Method and System for Optimizing Decibel Data Conversion. This invention provides an ability to convert linear signals into decibel units via digital logic circuitry. The resultant system can present information to users in real-time. This is made possible by performing an approximation function that is simple enough to be implemented directly in digital hardware, rather than through software executed by massive computing resources. An exemplary application for this technology is as a component of a surgical reactive electronic jamming system. This invention allows a surgical reactive jammer to determine precisely the correct jamming thresholds to apply in real-time. It allows signal surveillance equipment to survey the spectrum and display those results in dBm with far more efficiency than before. Finally, it enables a whole industry of communications related devices that need to do real time decibel conversion.

Abstract: A digital demodulating apparatus includes a tuner that selectively receives one of frequency bands, and a demodulator that demodulates a signal from the tuner.

Abstract: The functionality associated with an RDS/RBDS messaging system is enhanced by allowing users of the system access to a secure server which gives them the ability to manage the user address space, to compose custom and preformatted messages and to access CAP files that might contain information affecting users in the area of an FM transmitter sending alert messages. The alert messages are sent to the RDS/RBDS encoder as ODA data groups using a developed protocol. Standard alert radios are modified to utilize the functionality of the system. The system will also send back up alerts to a users cellular telephone and to specified email, SMS and text messaging destinations.

Abstract: There is a need for an inexpensive, high-performance, fully-integrable, multi-standard transceiver, which suppresses spurious noise signals. The invention provides a topology that satisfies this need, using a first signal generator which produces an oscillator signal f1 and a second signal generator which produces a mono-tonal mixing signal ?2, where f1 is a multiple of the frequency of ?2; and a logic circuit for generating a multi-tonal mixing signal ?1, where ?1*?2 has significant power at the frequency of said local oscillator signal being emulated, neither of said cp1 nor said ?2 having significant power at the carrier frequency of said input signal x(t) or said LO signal being emulated.

Abstract: A tracking generator for an RF measurement instrument having a receiver and a controller includes a vector modulator internal to the tracking generator. The internal vector modulator modulates complex baseband signals based on data from the controller to produce a vector modulation signal. The vector modulation signal is used to modulate a local oscillator frequency from the receiver in an output mixing stage to produce a test signal having an output frequency that matches a measurement frequency to which the receiver is tuned. By controlling the complex baseband data from the controller, an adaptive filter at the output of a DAC that produces an analog signal from the digitally modulated complex baseband data, an internal independent oscillator for the vector modulator, or a large offset phase-locked loop, an offset from the measurement frequency may be generated for the output frequency.

Abstract: Receiver comprising an RF input filter including a digitally controlled capacitor bank with n capacitors being controlled by a tuning control signal for varying the tuning frequency of the RF input filter within a tuning range. For an improvement of the receiver in price/performance ratio the n capacitors of the digitally controlled capacitor bank are monolythically integrated, whereas the bandwidth of the tunable RF input filter is being adjusted to the maximum relative spread of said capacitors. A continuous tuning control signal is being supplied through an analogue to digital (AD) converter to said capacitor bank and to a first input of a differential stage, an output of the AD converter being coupled through a digital to analogue (DA) converter to a second input of a differential stage, an output of the differential stage being coupled to a control terminal of a variable capacitance diode being arranged in parallel to the digitally controlled capacitor bank.

Abstract: In a broadcast receiving system, a first antenna receives a broadcast signal of a first frequency band and a second antenna receives a signal of a second frequency band different from the first frequency band. A frequency conversion unit converts the signal of the second frequency band into a second signal of the first frequency band. A selection unit selects one of the broadcast signal output from the first antenna and the second signal output from the frequency conversion unit. A demodulation unit demodulates the one of the broadcast signal and the second signal selected by the selection unit.

Abstract: An electronic tuning system includes an electronic tuner for adjusting the predetermined control voltage of a voltage controlled oscillator (VCO) to tune the local frequency signal to radio waves on an arbitrary channel in accordance with channel selection information. A booster circuit boosts a source voltage to generate a boosted voltage in order to ensure the predetermined control voltage. A non-volatile memory stores the channel selection information in response to a predetermined write voltage. The boosted voltage of the booster circuit is utilized as the predetermined write voltage.

Abstract: An integrated low-IF (low intermediate frequency) terrestrial broadcast receiver and associated method are disclosed that provide an advantageous and cost-efficient solution. The integrated receiver includes a mixer, local oscillator generation circuitry, low-IF conversion circuitry, and DSP circuitry. And the integrated receiver is particularly suited for small, portable devices and the reception of terrestrial audio broadcasts, such as FM and AM terrestrial audio broadcast, in such portable devices.

Abstract: Herein disclosed is a broadcast wave receiving apparatus, comprising: first and second tuning circuits each having a resonance frequency; first controlling means for controlling one of the first and second tuning circuits to ensure that the resonance frequency of one of the first and second tuning circuits is tuned to a specific frequency before allowing one of the first and second tuning circuits to detect a broadcast wave at the specific frequency; judging means for judging whether or not to receive the broadcast wave detected by one of the first and second tuning circuits on the basis of predetermined threshold information on the broadcast waves; and second controlling means for controlling the other of the first and second tuning circuits to ensure that the resonance frequency of the other of the first and second tuning circuits is tuned to the specific frequency before allowing the other of the first and second tuning circuits to produce a broadcast signal indicative of the broadcast wave detected by one

Abstract: A front end tuning system includes a tuning signal generator. The tuning signal generator includes a digital-to-analog converter (DAC) to receive a pre-conditioned tuning signal at a reference input, to receive a digital value at a digital control input, and to produce a modified tuning signal based on the digital value and the pre-conditioned signal. Preconditioning the tuning-voltage allows a simple current type DAC to be can be used, rather than an 8-bit ladder type DAC used by some other front end tuners. Significant cost savings can be achieved because less memory is required to store the digital values supplied to the DACs, and set up times can be reduced. An adjustable temperature compensation circuit provides additional adaptability.

Abstract: A wireless audio distribution system may include a wireless transmitter transmititing an encoded digital bitstream serially combining each of a plurality of audio input channels and control data, a wireless receiver receiving the transmitted bitstream, a manual selector switch to for selecting one or more of the audio input channels and a sound producing device reproducing the selected audio channels in accordance with the control data. A system may include a wireless receiver receiving an encoded digital bitstream combining each of a plurality of audio input channels with control data disbursed therein, a manual selector switch for selecting audio input channels and a sound producing device for selectively decoding and demultiplexing the selected audio channels to be reproduced in accordance with the control data.

Abstract: The present invention provides a human-machine interface where control is achieved without the use of buttons. By providing multiple knobs, the audio system maximizes functionality while minimizing cost and space requirements. Each knob is capable of two selection modes: a first selection mode provided by rotating the knob and a second selection mode provided by depressing the knob. The two selection modes correspond to ergonomic selection pairs for controlling the audio system. The reduced area required for controls allows for a larger display area; which provides the user with a more attractive display that can convey more information. When a change in a status, through knob manipulation is sensed by the audio system, the display automatically provides a menu that corresponds to the ergonomic pair assigned to that knob. The automated switching of menus minimizes navigation between screens, while providing full manipulation of that audio system function using a single knob control.

Abstract: A method and apparatus for improving co-existence between Bluetooth and 802.11 networks is described. In one embodiment, the invention is a method. The method includes detecting in software a backup in transmission of data through a first wireless channel. The method further includes shifting priority in software from transmission of data through a second wireless channel to transmission of data through the first wireless channel. The method also includes determining in software if the backup eases and shifting priority back in software from transmission of data through the first wireless channel to transmission of data through the second wireless channel. As will be appreciated, characteristics of an embodiment of the invention need not appear in all embodiments within the spirit and scope of the invention.

Abstract: In one embodiment of the present invention, an apparatus includes a plurality of gain stages each having a gain greater than one, and which are coupled to create a positive feedback at an oscillation frequency. The gain stages may be formed of transconductance gain stages which may be coupled together as a ring oscillator or a latch type circuit. Such circuits may be used as calibration circuits in which small signal parameters of the gain stages are directly calibrated, and are used in turn to directly calibrate small signal parameters of a target circuit.

Abstract: A technique for determining a tuning frequency of an audio receiver includes interrupting a received radio frequency (RF) signal at an input of the audio receiver. Next, a modulated audio signal is injected into the input of the audio receiver. Then, it is determined whether the demodulated audio signal is present at an output of the audio receiver. If not, the frequency of the modulated audio signal is changed until the demodulated audio signal is detected at the output of the audio receiver.

Abstract: A broadcast receiver which detects the reception status of radio waves from other stations without deteriorating the reception status of a currently-receiving station, in digital broadcasting where consecutive time series data is transmitted. The amount of time-based interleave applied to the currently-receiving data is determined so that the reception status of the radio waves from other stations is detected while the reception of the currently-receiving broadcast station is interrupted within the extent where missing data can be recovered by such interleave and error correction processing on demodulation.

Abstract: The invention involves the usage of radio frequency, infrared, and low frequency radio frequency to accurately track transponders (tags) that are placed on objects. Transponders about the size of a small watch or a badge that can be worn on a lapel or pocket are used. The transponders are attached to staff, assets, and/or patients. Typically, ceiling mounted readers are used. The system utilizes the readers to triangulate the position of the transponders. The transponders can triangulate to a resolution accuracy of a couple of inches to 10 feet within 4 seconds. The system is also capable of triangulating the position of tags when they are lost to IR using RF. The system works with vector floor plans (AutoCAD or Microstation). This enables the system to function so that detail doesn't deteriorate even with large areas (100,000 square feet to unlimited miles). This enables accurate reading of room labels to quickly identify exact location of tags.

Abstract: A frequency generator which can perform stable frequency oscillation unaffected by temperature variation. A frequency generator having a differential amplifier (1) having an LC resonance circuit (10) as a load and buffer circuits (21, 22) feeding back an output of the differential amplifier to its input, wherein a temperature coefficient converter (5) converting an output voltage of a reference voltage generator (4) and its temperature dependence to a voltage having a predetermined voltage and temperature coefficient and outputting it is provided to control bias currents IEF of emitter follower circuits to be in proportion to temperature variation. There are a characteristic in which delay time of the emitter follower circuits constructing the buffer circuits is in inverse proportion to a transconductance of transistors and a characteristic in which the transconductance is in inverse proportion to temperature and is in proportion to the bias currents IEF.

Abstract: A receiver includes an antenna, an impedance-matching circuit, a receive circuit, a control circuit, a digital-to-analog (D/A) converter, a mode switch, and an EEPROM. The impedance-matching circuit includes a variable-capacitance diode. The control circuit determines an operation mode set by the mode switch. It controls the D/A converter to produce different levels of the reverse bias voltage when the operation mode is set to an adjustment mode. It determines strength of receive signals based on receive signal strength indication (RSSI) signals indicating strength of the receive signals. It determines a maximum value of the RSSI signals based on the results of the determination, and stores D/A input data corresponding to the maximum value in the EEPROM as the adjustment data. It loads the adjustment data from the EEPROM and controls the D/A converter to produce a reverse bias voltage based on the adjustment data. The D/A converter applies the voltage to the variable-capacitance diode.

Abstract: An RF system integrated with an RF switching unit and an RF modulator unit.

Abstract: A tuning circuit having an amplitude-varying function is disclosed that comprises a coil, a capacitor, and a resistance-adjusting element connected in parallel to the coil and the capacitor for varying resistance at time of resonance of the tuning circuit, wherein the amplitude of an output signal of the tuning circuit is varied by varying the resistance with the resistance-adjusting element.

Abstract: A multi-band receiver in which characteristics including a tracking error are improved is provided with a variable frequency oscillator circuit, a variable divider circuit (39) for dividing an oscillation signal (SVCO) of the variable frequency oscillator circuit, and mixer circuits (15I) and (15Q) for subjecting a received signal SRX to frequency conversion into an intermediate frequency signal (SIF) by a local oscillation signal (SLO). A divided output of the variable divider circuit (39) is supplied as the local oscillation signal (SLO) to each of the mixer circuits (15I) and (15Q). When a signal in a first frequency band is received, the division ratio n of the variable divider circuit (39) and the oscillation frequency of the variable frequency oscillator are changed to change the reception frequency in the first frequency band.

Abstract: A technique is provided for reducing power consumption of an internally powered console in an audio system through frequency based signal routing. A system employing the technique includes a base unit having an interface for receiving a signal representative of acoustic information. The base unit includes a filter system for splitting the signal into low-frequency and high-frequency component signals. The low-frequency signal is routed to a first audio driver for reproduction. The high-frequency signal is routed to a device that includes a second audio driver. By removing the need to reproduce the low-frequency portion of the acoustic information, the power consumption of the device is reduced.

Abstract: A system and method are disclosed for configuring a frequency synthesizer in a transceiver. Configuring a frequency synthesizer in a transceiver includes specifying a selection bit sequence wherein the selection bit sequence corresponds to a predetermined combination of transceiver characteristics; determining a plurality of synthesizer configuration parameters using the selection bit sequence; and configuring the frequency synthesizer using the plurality of synthesizer configuration parameters.

Abstract: Apparatus, and an associated method, for facilitating personalization of a weather band radio that receives SAME messages broadcast by the NWR system. Alphanumeric indicators of locations are displayed upon a user display element. And, a listener of the radio enters, by way of a user input actuator, selection of selected geographical areas, identified by the alphanumeric indicators. The selected alphanumeric location is used to form a six-digit location code defined by the Federal Information Processing Standards (FIPS). And, the code so-formed is used by the weather band radio, selectably to alert weather anomalies broadcast by the NWR system within the selected geographical area of interest.

Abstract: A communication amount monitoring circuit (124) monitors a transmission buffer (123) to which communication data (122) is input, and discriminates the magnitude of the amount of communication data. If the amount of information per unit time is relatively large, information is read out from the transmission buffer in accordance with a chip clock. This information is modulated as communication data (137) by a modulator (139) and transmitted. If the amount of information is relatively small, information is read out from the transmission buffer (123) in accordance with a clock obtained by frequency-dividing the chip clock. This information is exclusive-ORed with a spreading code generated by using the chip clock and is then modulated by a modulator (139). The resultant data is transmitted as communication data (137).

Abstract: The wide bandwidth transceiver includes a receiver section, a transmitter section, and a local oscillation module. The receiver section includes a 1st receiver intermediate frequency (IF) stage, a receiver switch module, and a 2nd receiver IF stage. The 1st receiver IF stage is operably coupled to convert a 1st inbound radio frequency (RF) signal into a 1st inbound IF signal based on a 1st local oscillation of the local oscillation module. The receiver switch module passes either the 1st inbound IF signal or a 2nd inbound RF signal, which have similar carrier frequencies, to the 2nd receiver IF stage. The 2nd receiver IF stage receives the selected signal from the receiver switch module and based on a 2nd local oscillation converts the selected signal into a low intermediate frequency signal. The transmitter section includes a 1st transmitter intermediate frequency (IF) stage, a 2nd transmitter IF stage, a power amplifier and a transmitter switch module.

Abstract: The system controller 12 attains program table data from a received electric wave upon turning on the power source. Program table data are rearranged for every ensemble and stored again. The user makes an input operation to set a channel-feed selection which requires switching of a program to be attained. Then, the system controller 12 performs a processing of attaining a program listed next in the same ensemble as that of the program which has been attained just before based on the rearranged program table data. When attaining a program next to a program listed in the last, the ensemble is switched to another ensemble. Programs are attained sequentially from the program listed first in the another ensemble thus switched. Switching to a different ensemble takes place at a reduced frequency, so that the time until output of an attained program can be shortened.

Abstract: A multimedia system which substantially integrates analog functions normally found in consumer radios (radio frequency tuner functions, volume functions), and information streams from a digital network in a single design. The system may include an Ethernet interface, central processing unit, memory, local storage device, analog to digital converter, digital to analog converter, audio output speakers, microphone, display controller, liquid crystal display panel, user interface logic, controls for tuning streams, analog and digital radio frequency tuner, and an analog storage device. The system may generate analog signals for audible reproduction. The source of audio signals may be configured in real time by the user. The hardware implementation allows for selection of broadcast radio or digital network streams such that hardware signals indicating which broadcast radio or digital stream to play from are fed to a hardware circuit which determines which stream is sent to an audio output device.

Abstract: A wireless transmission device for communicating a plurality of audio streams to remote devices may include a plurality of inputs for receiving a plurality of digital audio streams, a combiner connected to the inputs for combining control codes and the received audio streams in a predetermined format to form a signal wherein the control codes for controlling the operation of a remote device equipped for processing the signal to extract the audio streams therefrom in accordance with the predetermined format, and a transmitter connected to the combiner to transmit the signal for reception by the remote device. The transmitter may include an infra-red light emitter for transmitting the signal as an infra-red light signal.

Abstract: A method for recording information that is transmitted over a radio frequency, especially traffic information, in which, in a monitoring state, the receiving device is supplied with power in a clocked manner. While switched on, the receiving device is tuned to a preestablished radio frequency and the received radio frequency is monitored for the presence of an identifier designating information. In the event an information identifier is detected, the receiver is supplied with power for the duration of the identifier and the information is recorded. In response to switching on the monitoring state, the preestablished radio frequency is determined as the frequency to which a radio frequency refers that transmits no information and that was set before the monitoring state was switched on.

Abstract: A system and method for processing signals in a mobile terminal routes received signals to signal processing units based on the bands in which the signals are located. Routing is preferably performed by a m-pole/n-throw electric switch where m?1 and n?1. The signal processing units may process signals in, for example, the DCN, PCS and GPS bands although other bands are possible. By using an electric switch instead of, for example, a diplexer circuit, the system and method significantly reduces insertion loss while simultaneously increasing the degree of isolation among the different bands of the received signals. Optimal receiver sensitivity is also achieved in each respective band.

Abstract: In a mixer of a converter, a bipolar transistor is connected between the base of a bipolar transistor and a positive power-supply node within a driving circuit, as a temperature characteristic compensating circuit. When the ambient temperature of the driving circuit rises, collector current of the transistor is increased due to the temperature characteristic of the transistor. This lowers the drain voltage of a high electron mobility transistor. However, collector current of the transistor within the temperature characteristic compensating circuit is also increased, increasing the voltage at a point, so that the increase in the collector current of the transistor is suppressed. This results in a stabilized drain voltage of the transistor. Therefore, the low noise down-converter can supply a stable voltage to a transistor performing frequency conversion, without any effect from the change in the ambient temperature.

Abstract: Electronic circuitry supports utilization of a series of pulses of varying width to tune a transducer (e.g., a coil that produces or receives a magnetic field) for transmitting or receiving. For example, a control voltage generator generates a sequence of digital pulses of varying pulse widths to produce respective control voltages. The control voltage generator applies a produced control voltage to a varactor element whose capacitance changes depending on a magnitude of the produced control voltage. The varactor element forms part of a tank circuit. Consequently, the series of pulse widths controls an operating frequency of the tank circuit at different times. The tank circuit includes an inductive coil that is tuned to produce or receive a magnetic or inductive field.

Abstract: A signal intercept and analysis processor for a wideband intercept receiver system including at least one wideband receiver has a signal detector operatively connectable to the wideband receiver and a signal extractor operatively connected to the signal detector and connectable to the wideband receiver for performing signal extraction directly on a wideband signal output of the receiver and for performing the signal extraction only upon detection of a signal by the signal detector. The signal detector includes a generator of a coarsely sampled or decimated time-frequency representation of the wideband signal output. The time-frequency representation is decimated or coarsely sampled in time compared to an inverse frequency filter bandwidth used in the time-frequency representation. The generator preferably includes a digital filter bank.

Abstract: The invention relates to a dual mode radio frequency reception device of the type enabling the reception firstly of multi-carrier broadcast signals in a first frequency band and secondly radio positioning signals in a second frequency band, comprising a single preprocessing module (21), particularly including a pass-band antenna filter (211) in which the pass-band includes at least the said first and second frequency bands, and outputting firstly to a first processing system (22) to process the said multi-carrier broadcast signals, and secondly to a second processing system (23) to process the said radio positioning signals.

Abstract: A front end tuner for receiving TV signals and the like includes a frequency conversion circuit including a mixer for beating a local signal with received signals within a predetermined band of frequencies to provide selected signals within a predetermined band of frequencies to provide selected signals within a predetermined channel band of frequencies. A signal converter circuit generates digitally encoded signal representations of the selected signals. The frequency conversion circuit and the signal converter circuit are in a form of an integrated circuit within a semiconductor substrate. In a TV receiver, on-following digital processing of the digitally encoded signals is performed in a microcomputer. In one example a channel selection code is used by the microcomputer to synthesize the local oscillator signal and in another example the signal converter circuit is a codec, responsive to codes from the microprocessor, to supply a control voltage for controlling a local oscillator.

Abstract: A wireless audio distribution system having a wireless transmitter, responsive to a plurality of audio input channels, for transmitting a encoded digital bitstream serially combining each of the audio input channel, the encoded digital bitstream further including control data disbursed therein, a receiver, responsive to the transmitted encoded digital bitstream, for decoding and demultiplexing the digital bitstream, a manual selector switch, connected to the receiver device for selecting one or more of the audio input channels to be reproduced, and a sound producing device for selectively reproducing the one or more selected audio channels in accordance with the control data.

Abstract: The continuing validity of a lookup table in a radio receiver for tuning to digital audio stations is monitored. The radio receiver is tuned to a first designated frequency. A determination is made whether a station identification code is identified in a digital broadcast signal at the first designated frequency matches the designated station identification code in the table entry. The radio receiver is tuned to a next designated frequency. A determination is made whether a next station identification code identified in a next digital broadcast signal at the next designated frequency matches the next designated identification code in a next table entry. A determination is made whether an invalid table condition occurs wherein the invalid table condition is a predetermined number of non-matches from the determining steps. A message is displayed that the lookup table is invalid when the invalid table condition occurs.

Abstract: A tuner receiving system, a control unit for controlling a tuner receiving operation, a computer readable storage medium, and a method of receiving radio waves by using a tuner, are disclosed. The tuner receiving system outputs video and audio signals by processing the signals sent out when communication is established between a tuner unit for receiving radio waves from external sources and a capture card or the like. The main part of the system or the control unit discriminates the type of the tuner included in the tuner unit, based on a control signal output from the tuner unit after the start of the communication between the tuner unit and the communication interface unit, and displays a receiving station corresponding to a channel receivable by the tuner, in accordance with the type of the tuner and information from the communication interface unit.

Abstract: A radio receiver performs a tune to a target frequency channel to recover a main audio program signal from a duplicative signal wherein the duplicative signal includes a primary signal and a backup signal both containing the main program audio signal. The backup signal is provided in a center portion of the target frequency channel and the primary signal is provided in an upper and lower sideband portion of the target frequency channel. The backup signal contains an identifying data which relates to the presence of the primary signal. The method includes tuning to the target frequency channel. The receiver filters the target frequency channel using a narrow bandwidth. A determination is made whether the identifying data is present. If the identifying data is present, then the main audio program is retrieved from the primary signal using a wide bandwidth, otherwise the narrow bandwidth is used to retrieve the main audio program from the backup signal.

Abstract: A system and method for reducing or eliminating signal amplitudes near or crossing zero is disclosed. Communication systems and methods employing a single carrier or multiple carriers and employing reduction of signal amplitudes near or crossing zero are also disclosed. Communication systems and methods using envelope elimination and restoration amplification and reduction of amplitudes near or crossing zero are also disclosed.