Abstract: A method, system, media, and apparatus are directed to radio recording. Radio stations are simultaneously recorded based on a radio parameter including a processing parameter, a memory usage or allocation, a recording status, or the like. The radio parameter is adapted for an individual station, some radio stations, or all radio stations. The processing parameter is adapted based on a processor usage. The memory usage is adapted based on a memory requirement of a station being recorded. A station may be suspended from recording based on a loss of a signal and resumed based on a resumption of the signal. An access to a radio content recorded while a signal was available may be provided, if the signal is unavailable. The plurality of stations may be prioritized.

Abstract: Methods and apparatus for conditioning low-magnitude events in electrical signals. According to an exemplary method, a low-magnitude event occurring in a signal trajectory of a received electrical signal is analyzed. The low-magnitude event is defined by a data point on a signal trajectory having a magnitude that is less than a predetermined signal magnitude minimum. A correction impulse having a correction magnitude and a correction phase is generated based on the magnitude and phase of data points on the signal trajectory that occur prior to and after the occurrence of the low magnitude event. The correction impulse is combined with the original electrical signal in the temporal vicinity of the low-magnitude event, thereby generating a corrected electrical signal having a more controlled bandwidth.

Abstract: A wireless headphone device may include a receiver for receiving a wireless digital signal containing a plurality of digital audio streams combined with control codes according to a predetermined format, a manually operated selector switch for selecting one or more of the plurality of digital audio streams to be produced as audio for the user, and a decoder for extracting the selected audio streams from the received signal in accordance with the predetermined format and for responding to the control codes in the received signal to perform predetermined functions.

Abstract: Systems and methods are disclosed that use multiple DC-DC (direct-current-to-direct-current) regulators and configurable DC-DC regulators with respect to multi-band audio receivers in order to allow for the use of different DC-DC regulator switching clock signals for different audio broadcast bands. The systems and methods disclosed thereby help to alleviate interference problems typically caused by switching devices used in the DC-DC conversion process. The embodiments described are also applicable to switching power supplies run from alternating current (AC) power sources and to Class D amplifiers working with broadcast radios.

Abstract: Mobile, diversity tuned set-top boxes. The mobile set-top boxes described herein comprise a housing, a demodulator having a plurality of tuning circuits, and an antenna having antenna elements. Each antenna element inputs modulated signal to the plurality of tuning circuits in a switched manner, and the antenna elements are reticulatable with the housing to first and second positions.

Abstract: A Method and Apparatus for Detecting the Presence and Locations of Radio Controlled Improvised Explosive Devices in Real Time. The system will clandestinely detect the presence and location of RCIED's along roadways in real time. This “RCIED Street Sweeper” system consequently allows its users to remove the explosive devices, pre-detonate them, or simply avoid the location so that the weapons cannot be used against a convoy or other important target. The system has the abilities (disclosed in U.S. patent application Ser. No. 10/829,858) to conduct fast wideband scanning of the RF spectrum looking for ambient RF signals as well as RCIED leakage signals. Furthermore the system has the ability to correlate the received leakage signals with the ambient RF signal environment, in order to verify authenticity. Still further, the system has the ability to continually mark and record the precise map location where each of those RF spectrum measurements emanated, including the relative distances between them.

Abstract: A CPU confirms a receivable channel while sequentially changing channel numbers set to an analog front-end unit and specifies an area in which the receivable channel can be received and an area adjacent thereto by referring a receiving channel table by area and an adjacent area table after confirming the receivable channel. After this, the CPU confirms the receivable channel while sequentially setting the channel numbers receivable in the adjacent areas to the front-end unit to specify areas matching with the confirmation result. When the number of specified areas becomes one, the CPU assigns channel numbers to each switch formed of a channel switch group of a user interface unit.

Abstract: A receiver input circuit comprises an R-? type low-pass filter, a small-capacitance type coupling capacitor element and a parallel tuning circuit. The low-pass filter has an inductor element and a first capacitor element both connected in series, and a shunt-connected second capacitor element. The first and second capacitor elements are equivalent to ones obtained by dividing a normal shunt-connected capacitor element into two. A total capacitance value thereof is selected equal to the capacitance value of the normal shunt-connected capacitor element. The parallel tuning circuit makes use of a tuning first variable capacitance type capacitor element. A second variable capacitance type capacitor element is used for the small-capacitance type coupling capacitor element.

Abstract: A JFET 4 to be an antenna buffer for an AM broadcasting signal is constituted in a source follower form of a 100% negative feedback type, and a tuning circuit including a variable capacitive circuit 7 and a transformer 6 is provided in a subsequent stage to the JFET 4 and an amplifying circuit including MOSFETs 10 and 11 is provided in a further subsequent stage thereto. Consequently, it is possible to reduce a signal distortion rate in the JFET 4 and to eliminate a drawback that every frequency component enters the amplifying circuit to saturate the amplifying circuit, resulting in an occurrence of a distortion in an output signal. By switching a plurality of capacitors CT1, CT2, . . . CTn to cause a capacitance value to be variable without using a varactor diode, it is possible to integrate the capacitors CT1, CT2, . . . CTn in an IC 20.

Abstract: A system for processing signals is disclosed and may include a single chip having an integrated Bluetooth radio and an integrated FM radio. The single chip may include at least one processor that enables selecting from a range of FM channels, a particular frequency for one of the FM channels based on an intermediate frequency (IF). The particular frequency may be selected so that it is an integer multiple of a channel spacing between neighboring allocated FM channels within the range of FM channels, and may be offset by at most one-half the channel spacing. The at least one processor may enable determining a frequency error of the selected particular frequency for the one of the FM channels. The at least one processor may also enable determining, whether the particular frequency includes an on-frequency channel based on the determined frequency error.

Abstract: In one embodiment, a method is provided of communicating in a wireless communication system. The method comprises (a) setting a decrement burst variable to be equal to a predetermined number representing a number of bursts of data from which to prematurely decode a USF codeword, (b) receiving a received burst of data comprising USF related data related to a portion of a USF codeword, (c) extracting said USF related data from said equalized received burst of data, (d) determining if a burst number variable is equal to said decrement burst variable, (e) incrementing said burst number variable and repeating (b) through (d) if said burst number variable is not equal to said decrement burst variable, and (f) decoding said USF codeword if said burst number variable is equal to said decrement burst variable.

Abstract: A front-end circuit with coherent tunable filters is provided. The circuit includes a first filter, an amplifier, and a second filter. The amplifier is coupled to the first filter, and the second filter is coupled to the amplifier. Furthermore, the amplifier is placed between the first and second filters. The first filter has a first tunable intermediate frequency, and is used to filter a received signal. The amplifier is used to amplify the output of the first filter. The second filter has a second tunable intermediate frequency, and is used to filter the output of the amplifier. The first and second intermediate frequencies have a coherent-tuning relation with each other.

Abstract: A transmitter device (100) receives an audio signal from an audio source device (112), and transmits the audio signal at a low power over a commercial broadcast channel to a local receiver (120). The transmitter device selects an initial channel by scanning the available spectrum, partitioned into sub-bands (210-206), and measuring the received signal strength in each channel. The channel having the lowest strength is used to set a threshold. The sub-band with most channels meeting the threshold is initially selected, and the channel in the initially selected sub-band with the lowest received signal strength is selected for initial use. A context-based weighting factor may be applied in selecting the initial channel or in selecting subsequent channels when the initial channel conditions degrade.

Abstract: A harmonic suppression mixer for down converting an RF signal to a complex I and Q baseband signal that uses a plurality of switching mixers each with a gain stage to produce a sinusoidal weighted sum of the mixer outputs. Odd harmonics output by each switching mixer is suppressed in the composite signal. A low skew local oscillator (LO) clock generator creates multiple LO phases and drives the mixers. The mixer can be used in low noise direct conversion RF tuners. The mixer is configurable by programming gain stage coefficient values to achieve a variable number of effective mixers used in combination. At low tuning frequencies, all available mixers are programmed with unique coefficients and driven by different LO clock phases to achieve maximum harmonic suppression. At high tuning frequencies, some mixers are paralleled and duplicate coefficients are programmed or mixers are disabled to reduce the number of effective mixers.

Abstract: A tuner for a wireless receiver is provided, which may include an input interface that is adapted to receive wireless signals, a mixer that is adapted to select a specific frequency from signals received at the input interface, and a controllable switch that is adapted to lead an output from the mixer towards a base-band unit of the receiver and to disconnect the output. The tuner may further include a controller which may be adapted to operate the controllable switch to disconnect the output of the mixer when the controller studies characteristics of the tuner and to reconnect the output of the mixer at other times. The studied characteristics may be associated with parasitic direct current voltages in the tuner, which may be associated with a low noise amplifier of the tuner, or programmable gain amplifier of the tuner or with both amplifiers.

Abstract: The wide bandwidth transceiver includes a receiver section, a transmitter section, and a local oscillation module. The local oscillation module generates a first and a second local oscillation. The transmitter section converts an outbound baseband signal and/or a low intermediate frequency (IF) signal into a first outbound radio frequency (RF) signal based on the second local oscillation when the wide bandwidth transceiver is in a second wireless standard mode and converts the outbound baseband and/or the low IF signal into a second outbound RF signal based on the first and second local oscillations when the wide bandwidth transceiver is in a first wireless standard mode.

Abstract: A dual channel broadcast receiver includes: a first receiving section having a first antenna, a first low noise amplifier for amplifying a signal received by the first antenna, and a first power divider for dividing a signal fed from the first low noise amplifier into two signals to be outputted therefrom; a second receiving section having a second antenna, a second low noise amplifier for amplifying a signal received by the second antenna, and a second power divider for dividing a signal fed from the second low noise amplifier into two signals to be outputted therefrom; a dual tuner having a first RF input terminal and a second RF input terminal; and a selecting section for, in dual channel reception, selecting and feeding to the first and second RF input terminals either a signal fed from the first receiving section or a signal fed from the second receiving section. The dual channel broadcast receiver does not supply power to an antenna that is not being used.

Abstract: An apparatus may include a filtering network and a switch. From an amplified signal, the filtering network produces a filtered signal for wireless transmission in a frequency band. The switch includes a first terminal, a second terminal, and a switching element. The first terminal receives the filtered signal and the switching element selectively couples the first and second terminals. The filtering network also attenuates harmonics of the filtered signal that are generated by the switch. This attenuation establishes compliance with a harmonic emissions power limit associated with the frequency band. More particularly, this attenuation reduces at least one of the harmonics from a level exceeding the harmonic emissions power limit to a level within the harmonic emissions power limit.

Abstract: Embodiments of the invention relate generally to a radio communication device, to a receiver controller of a radio communication device, and to a method for searching for a radio cell. In an embodiment of the invention, a method for searching for a radio cell is provided. The method may include scanning at least one frequency band of a first radio access technology, scanning at least one frequency band of a second radio access technology, wherein the at least one frequency band of the second radio access technology at least partially overlaps with the at least one frequency band of the first radio access technology, wherein at least one frequency sub-band of the first radio access technology is not scanned in the at least one frequency band of the second radio access technology.

Abstract: In a tuning circuit constituted by connecting a coil L and two capacitors C1 and C2 into a ? type, a total capacitance value obtained by adding respective capacitance values of an input capacitance Cin and the first capacitor C1 which are connected to one of terminals of a coil L is set to be equal to a capacitance value of the second capacitor C2 connected to the other terminal of the coil L (C2=Cin+C1). Consequently, a capacitance value on one terminal side of the coil L and a capacitance value on the other terminal side are set to be equal to each other and are thus balanced, and a level difference between two output signals on a parallel resonance point of the ? type tuning circuit is reduced even if the capacitance values of the two capacitors C1 and C2 are decreased.

Abstract: A system may include a buffer that is arranged and configured to receive an audio input signal and to buffer the audio input signal for a period of delay time, where the audio input signal includes one or more periods of silence and one or more periods of content and a processor that is arranged and configured to search the audio input signal for the periods of silence during the period of delay time. The system also may include a frequency modulation (FM) receiver that is arranged and configured to be enabled by the processor during the periods of silence to scan an FM spectrum for available frequencies for transmission and an FM transmitter that is arranged and configured to transmit the audio input signal on an FM frequency and to be disabled by the processor during the periods of silence.

Abstract: A signal matching module for single or multiple systems is disclosed, thereby enhancing the flexibility in using a communication module, and the performance of each subsystem. Further, a fine-tuning function is introduced into a selective matching circuit for the case that the inner matching components in the communication module cannot reach a required matching. Still further, a multi-stage matching circuit is used to reach a required Q-value (quality factor) for the matching circuit, thereby tuning the bandwidth. One of the preferred embodiments is to provide a unit cell which is used to connect with one or multiple subsystems, and a feeding point disposed outside the matching circuit to generate a better impedance matching and bandwidth.

Abstract: A method, apparatus, and computer program for controlling diversity reception in a radio receiver are provided. The radio receiver is configured to either activate or disable the diversity reception according to an application type of an application requesting transfer of data.

Abstract: The invention relates to methods by which radio signals can be transmitted to, and received by, a radio receiver such that the receiver consumes very little power from a battery or energy source. The invention is applicable not only to medical implants, but any application requiring a radio receiver to operate with very low power consumption.

Abstract: A media file content provider 30 sends a non-permanent copy of a media file, such as a music or video file, to a second mobile station MS 34 in response to a request from a first MS 22. The copy may be rendered non-permanent by streaming it, by encrypting it, and by appending a first instruction to automatically delete it after playing. The first MS 22 may be given an option of delivery pathways, such as cellular 76, 78, WLAN 80, or DVB-H 84. After playing, an offer is made to the second MS 34 to purchase a permanent copy of the media file. If accepted, the content provider may provide another copy of the media file, or preferably a permanent decryption key or a second instruction that defeats the first instruction prior to its deletion of the media file.

Abstract: A receiving apparatus according to the present invention includes an obtaining unit operable to obtain the reception level of a first radio wave received via one antenna of first and second antennas, and a transmission rate representing the transmission speed of the first radio wave, the transmission rate being included in the first radio wave and being set by a transmitting apparatus transmitting the first radio wave; a storing unit operable to store, for each of a plurality of transmission rates, a range of signal reception levels in which a packet error rate is substantially 0%; a determining unit operable to determine whether to switch from the one antenna to another antenna based on the reception level of the first radio wave and a first range of reception levels stored in the storing unit which correspond to the transmission rate of the first radio wave; and a controlling unit operable to control switching of the antennas when the determining unit determines to switch from the one antenna to the another

Abstract: The present invention provides a broadcast signal receiving apparatus and method both capable of reducing the influence of noise generated inside the receiving apparatus. A CPU transmits control information about an optimum TS output rate corresponding to a received channel signal to an OFDM-LSI, based on each output rate setting table stored in a memory in advance. The OFDM-LSI sets an optimum output rate and transmits a signal in accordance with the set optimum output rate.

Abstract: Radio frequency filtering includes receiving a signal and detecting a change in the direct current (DC) offset of the signal or a change in a component that affects the DC offset of the signal. The filtering also includes setting a cut-off frequency of a high-pass filter to a first frequency value in response to the detected change and filtering the signal using the high-pass filter with the cutoff frequency set to the first frequency value. The filtering further includes adjusting the cutoff frequency of the high-pass filter from the first frequency value to a second frequency value while filtering the signal using the high-pass filter where the second frequency value is less than the first frequency value.

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: Adjacent interference is reliably detected in an FM tuner. A receiving field strength judgment circuit (102) compares a reception field strength signal SM-DC input from an S-meter circuit (92) and a reference voltage Vref2, and outputs a receiving strength judgment signal SRE. An SD band judgment circuit (104) uses a window comparator to determine, based on an f-V conversion characteristic of a detection output SDET, whether or not a voltage ?V generated based on SDET is within a voltage range corresponding to a narrow band WN, and whether or not the voltage ?V is within a voltage range corresponding to a wide band WW; and outputs determination signals SBD-N, SBD-W corresponding respectively to WN, WW. An SD circuit (106) performs a station detection based on SRE and SBD-N, and determines the presence or absence of adjacent interference based on, e.g., SBD-N and SBD-W.

Abstract: A portable device that scans a subset of frequencies, such as the FM band, and displays to user the best carrier frequency for transmissions based on the received signal strengths. This device will find the carrier frequency that can provide the least amount of signal interference due to other transmitters in the area, and display the results to the user and/or reconfigures the receiver to tune to the best carrier frequency detected.

Abstract: A circuit and method for tracking a local oscillator signal frequency in an RF tuner, for tuning input RF signals. The RF tuner includes a frequency-dependent impedance generator that generates a frequency-dependent impedance at the input by rejecting unwanted input RF signals and shunt feeding back the desired signal to the input. The desired signal frequency is centered at the local oscillator signal frequency. The frequency-dependent impedance generator is used with an amplifier circuit to generate a tracking amplifier, the frequency-dependent amplifier gain of which tracks the local oscillator signal frequency.

Abstract: A system and method for providing services to users in vehicles based on radio broadcasts received by a vehicle's radio receiver. The system includes a computer-based vehicle unit located in a vehicle, a gateway configured to wirelessly send and receive information to and from the vehicle unit, and a computer-based server in communication with the gateway over a network. The vehicle unit includes a user interface component that presents the received content and radio broadcast and records user requests. The server processes the requests and sends confirmation messages back to the unit via the gateway when a request is completed or other information needs to be sent to the unit. The vehicle unit wirelessly receives a radio broadcast from a radio station, transmits user requests and vehicle information to the server via the gateway, and receives content back from the server.

Abstract: A disclosed method tunes a signal from a channelized spectrum having a predetermined channel spacing. A signal of interest having a predetermined maximum bandwidth is mixed with a local oscillator signal, which has a frequency that is an integer multiple of the channel spacing or one-half of a channel spacing displaced from an integer multiple of the channel spacing. The local oscillator signal is selected to frequency translate the signal of interest to within a near-baseband passband whose lower edge is spaced from DC by at least about the maximum bandwidth of the signal of interest. Problems associated with 1/f noise, DC offsets, and self-mixing products are avoided or substantially diminished. Other methods and systems are also disclosed.

Abstract: A single conversion tuner suitable for receiving RF signals having different requirements as to selectivity, linearity and image rejection is presented. Tuners of this kind are particularly useful for digital terrestrial as well as cable reception, where different modulation schemes require very high image rejection ratios on one hand and high linearity or pass band flatness on the other hand. The inventive tuner features a double-tuned tuneable filter in combination with an image reject mixer. The double-tuned filter provides excellent pass band flatness, while the image reject mixer provides a high intrinsic image rejection. The image rejection ratio of the combination of image reject mixer and tuneable filter is very high and fulfils the requirements of commonly used modulation schemes such as 8VSB, while the pass band flatness is compliant with the requirements for modulation schemes such as QAM.

Abstract: A broadcast receiver for and a method of providing broadcast channel information in which a broadcast search list is dynamically created and provided to a user, the broadcast receiver including: a tuner unit to tune a broadcast channel from a plurality of broadcast channels and to output a digital broadcast signal of the tuned broadcast channel; a broadcast signal processing unit to receive service information included in the broadcast signal output by the tuner unit; a storage unit to store the received service information and a control unit to dynamically create a broadcast search list based on the service information and to generate a screen providing the broadcast search list. Accordingly, it is possible to dynamically change a broadcast search list that provides search information regarding broadcast channels and to provide a user with the dynamically changed broadcast search list.

Abstract: A method for receiving broadcast signals includes selecting a broadcast signal, and receiving selected broadcast signal. Determine parameters about the selected broadcast signal wherein the parameters are based on supplemental broadcast data. Choose a scan interval based on the parameters.

Abstract: A digital tuner of a digital broadcast receiver provided. The digital tuner includes: an IB IF unit for converting an IB signal of the RF signal output into an ID IF signal; an OOB IF unit for converting an OOB signal of the RF signal output into an OOB IF signal. The IB signal and the OOB signal are simultaneously converted into IF signals prior to detection, whereby a digital broadcast signal can be smoothly received.

Abstract: A tuner (200) includes a direct digital frequency synthesizer (206) and a mixer (220). The direct digital frequency synthesizer (206) has an output terminal for providing a digital local oscillator signal having a frequency chosen to mix a desired channel to baseband. The mixer (220) has a first input terminal for receiving a tuned radio frequency signal, a second input terminal coupled to the output terminal of the direct digital frequency synthesizer (206), and an output terminal for providing an in-phase baseband signal.

Abstract: A method of estimating the carrier frequency of a signal is disclosed. The method comprising the steps of initializing a time average vector to zero, selecting a user-selectable time segment to divide a received signal into. A signal is received, and divided into the user-selectable time segments. A spectral peak vector is calculated by performing a spectral estimation process on the user-selectable time segment divided signal. A first correlation vector is calculated on the spectral peak vector, and a second correlation vector is calculated from the spectral peak vector and the first correlation vector. The time average vector is appended with the result from the second correlation vector, and the process repeats for each time segment the received signal was broken into. The carrier is estimated using the most commonly occurring frequency in the time average vector.

Abstract: 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.

Abstract: A tuner arrangement is provided comprising one or more tuners. Each tuner has two or more frequency changers, each comprising a mixer and a local oscillator. A controller controls the local oscillators in response to receipt of a channel select request. The controller determines the nominal frequencies of the local oscillators for tuning the selected channel and then performs a calculation to determine whether any beat frequencies between harmonics greater than the first harmonic of the local oscillators lie within the frequency band at the tuner output occupied by the selected channel. If so, the controller shifts the local oscillator frequencies so as to move the potentially interfering products outside the utilised band and then tunes the local oscillators appropriately.

Abstract: The method is for managing the operation of a wireless communication device including several different communication modules respectively adapted to operate according to several given communication protocols including a UWB module operating according to a UWB protocol based on an OFDM modulation scheme. The method includes controlling the UWB module for scanning a chosen frequency band, and managing a communication to be performed by the device on the basis of the scanning result.

Abstract: This disclosure is directed to a frequency-selective low noise amplifier (LNA) with wide-band impedance and noise matching. The LNAS may include a closed loop circuit that supports wideband input matching. For example, the closed loop circuit may be configure to impedance match an input signal and provide a low noise figure. In addition, the LNA may include an open loop circuit that amplifies the input signal and provides a high output impedance. The open loop circuit may further include a selectivity filter that filters out frequencies outside a desired frequency band. The LNA may drive a tunable band-pass filter via the open loop circuit.

Abstract: Data throughput functionality is improved in a network which supports high data rate applications and additional applications within a single receiver. Guidelines for tuning the receiver at variable time periods to avoid timeouts and fill radio link holes which result from non-received/unrecognized data are provided in connection with an algorithm of operation.

Abstract: A receiver contains a demodulator system that can deliver a stream of digital data comprising at least a first and a second audio program. If a user selects the first audio program, the receiver applies a first bit rate decompression to generate a stream of decompressed digital data. If the user selects the second audio program, the receiver applies a second bit rate decompression to generate a different stream of decompressed digital data. A digital to analog converter can be used to generate the corresponding analog signals.

Abstract: A receiver is disclosed. The receiver includes: a tunable low noise amplifier (LNA), the tunable LNA comprising: a plurality of LNAs for receiving and amplifying a plurality of frequency bands respectively; a plurality of first switches respectively coupled to the plurality of LNAs; a plurality of LC loads, respectively coupled to the plurality of first switches; a plurality of buffers, respectively coupled to the plurality of first switches; and a plurality of second switches, respectively coupled to the plurality of LC loads and an LO signal; a power detecting circuit for determining a signal power level corresponding to the LO signal; a first switch unit; and a controller, for isolating the output of the plurality of LNAs, selectively decoupling at least one of the LC loads according to the signal power level of the LO signal, and routing the LO signal to the second switches during calibration mode.

Abstract: An automatic tuning apparatus for a filter includes a mode wherein a switching part is controlled so that a reference signal is inputted to the filter, a plural number of control signals are successively input to a control terminal of the filter, a tentative value of the control signal is determined based on respective amplitudes detected by an amplitude detection part as a “coarse tuning step”, a plural number of control signals are successively input in the vicinity of the tentatively determined value to a control terminal, and the value of the control signal is determined to be used in a mode as a “fine tuning step” based on respective phase differences detected by a phase comparator part”.

Abstract: In a signal communication device, a frequency-selective filter has at least one component that is biased by a control signal to establish a center frequency of the frequency-selective filter. A closed-loop bias generator is provided to generate the control signal and to adjust the control signal based, at least in part, on a comparison of the control signal and a reference signal.

Abstract: Mobile device (3) and method for receiving and processing program-accompanying digital data, which are transmitted by a radio transmitter (1), for example a DAB transmitter, and of which at least certain comprise location parameters. The mobile device (3) includes a radio receiver (38), which can receive radio programs with program-accompanying digital data, and a position locating module (39) for establishing the current position, for example a GPS receiver. The mobile device (3) further comprises a filter module (37), by means of which, on the basis of the current position, determined by the said position locating module (39), location-specific information can be filtered from the received program-accompanying data, which contain, for example, order numbers, URL addresses or executable program data files. The received program-accompanying data can be filtered moreover by the said filter module (37) on the basis of a user profile (35) stored in the mobile device (3).