Abstract: A method is provided for enhancing the detection of the start time of a reference oscillator (4) of a super-regenerative receiver (1), which includes the reference oscillator, a bias current generator (7), an oscillation detector (6), and an impedance matching unit (3). Following the supply of the bias current (i_vco) after receiving the activation control signal (Sosc), an oscillation detection is performed by the oscillation detector (6), and once oscillation is detected, an additional amplification current (iboost) dependent on the envelope of the detected oscillation, of an amplification current generation circuit is supplied to the reference oscillator (4) in addition to the bias current to amplify the oscillation signal to be above a critical oscillation start threshold so as to precisely define the start time of the oscillator, and enable the oscillation detector (6) to order the stoppage of oscillation of the reference oscillator (4).

Abstract: Embodiments of the invention include a device and method for extending alerts for a wireless device. In one embodiment, a method for extending alerts for a wireless device includes linking the wireless device through a wireless connection with a wireless ringer module; wherein the wireless ringer module is removably coupled to a device having an interface for receiving and coupling with the wireless ringer module. The method further includes transmitting a signal to the wireless ringer that triggers an alert feature of the wireless ringer for notifying a user of an incoming communication in response to the wireless device receiving an indication of an incoming communication.

Abstract: Systems and method of embodiments herein operate to conserve battery power of user equipment (UE). Embodiments determine whether waking up a UE receiver would be beneficial and based on the determination, the UE either wakes up the receiver or returns to sleep. Embodiments determine whether to wake up the receiver by performing pre-wake up (PWU) operation which either wakes up the receiver in a low power mode or wakes up the UE's wake up receiver. It may be determined whether a wake up (WU) signal is received during a PWU stage. If a WU signal is received during the PWU stage the UE may perform a full wake up of the receiver. If a WU signal is not received the UE may return to idle mode. In embodiments, WU (Wake Up) DRX cycles are supplemented with a Full DRX (Discontinuous Reception) cycle.

Abstract: A method and apparatus logs alerts and response to alerts for members of an organization. When an alert message is transmitted to a user (i.e. the user's communication device), the alert activity is logged in a record. When the user acknowledges the alert, or fails to respond to the alert, the result is also logged. As such the organization can enforce compliance with alerting procedures and actions to be taken upon receiving an alert message.

Abstract: A method for a communication device includes determining whether a first radio frequency (RF) signal at a level of at least a first predetermined field threshold is detected. The method also includes generating a second RF signal at a level of at least a second predetermined field threshold greater than the first predetermined field threshold, when the communication device receives an instruction to generate the second RF signal and the determining determines that the first RF signal at the level of at least the first predetermined field threshold is not detected. The method further includes receiving a load modulated RF signal in response to the second RF signal.

Abstract: A method and apparatus for deriving presence information of a mobile device at a presence node in a wireless system, the method having the steps of: analyzing a message received from the mobile device to determine a message type; and allocating a state for the mobile device depending on the message type found in the analyzing step. The apparatus is a presence node for deriving and maintaining presence information of a mobile device in a wireless system, the mobile device communicating with a network node, the presence node having: a communication system for communicating with the network node; a processor; and an application running on the processor, the application having means for analyzing a message received from the mobile device at the network node to determine a message type; and allocating a state for the mobile device depending on the message type found in the analyzing step.

Abstract: A method includes encoding a session identifier into a uniform resource identifier (URI) associated with a TCAP Begin message request originating at an application server, where the session identifier identifies a communication session. The method also includes transmitting the TCAP Begin message request from the application server to a transaction capabilities application part (TCAP) interface and receiving a TCAP Continue message request from the TCAP interface with the TCAP Continue message request including the encoded URI. The method includes correlating the TCAP Continue message request to the communication session that originated the Begin request identified by the session identifier in the received URI and routing the TCAP Continue message request to the communication session.

Abstract: A method for a communication device includes determining whether a first radio frequency (RF) signal at a level of at least a first predetermined field threshold is detected. The method also includes generating a second RF signal at a level of at least a second predetermined field threshold greater than the first predetermined field threshold, when the communication device receives an instruction to generate the second RF signal and the determining determines that the first RF signal at the level of at least the first predetermined field threshold is not detected. The method further includes receiving a load modulated RF signal in response to the second RF signal.

Abstract: A medical device communication system includes a receiver adapted to receive radio frequency (RF) signals and configured to operate in a first mode to poll for an RF signal for a first time interval to detect an element of a valid input signal during the first time interval. In response to detecting the element of a valid input signal in the first time interval, the receiver operates in a second mode to poll for the RF signal for a second time interval to analyze the RF signal over the second time interval to detect a valid modulation of the RF signal. In response to detecting a valid modulation of the RF signal during the second time interval, the receiver is enabled to establish a communication session with a transmitting device.

Abstract: According to an embodiment, a wireless communication apparatus includes a communication control unit, a transmitting unit and a receiving unit. The communication control unit selects one frequency channel from a plurality of frequency channels and switches the frequency channel to be selected. The receiving unit is configured to receive a reception signal of the selected frequency channel from another wireless communication apparatus. The receiving unit includes an interference wave detection circuit configured to detect an interference wave signal of a detection frequency. The interference wave signal is included in an input signal received during an interference wave detection period. In the interference wave detection period, the reception signal is not received. The communication control unit masks a frequency channel related to the detection frequency among the plurality of frequency channels to create a frequency channel map. The communication control unit does not select the masked frequency channel.

Abstract: The invention relates to a wake up circuit comprising an antenna with a matching circuit, a wake up radio electrically coupled to the antenna, and an electronic circuit electrically connected to the antenna and the wake up radio such that the wake up radio triggers the electronic circuit on with a predetermined signal. In accordance with the invention between the antenna and the wake up radio is connected a passive mixer.

Abstract: A sampling circuit and a receiver are provided having a high flexibility of filter design and excellent characteristics for removing an interfering wave. Provided also are a sampling circuit and a receiver having a low level of the higher harmonic spurious. The sampling circuit includes a charge sampling circuit, which executes sampling of an input signal, and a plurality of charge sharing circuits connected in parallel to the output stage of the charge sampling circuit. The charge sharing circuits include a charge sharing circuit group having transmission functions different from one another, a synthesis circuit, which is arranged at the output side of the charge sharing circuit group and synthesizes the outputs of the charge sharing circuits, and a digital control unit, which outputs a control signal for controlling the operation of the charge sharing circuit group and the synthesis circuit.

Abstract: An RF feedback receiver arrangement includes a reference signal provider configured to provide, in a normal operating phase, a first reference signal having a first reference signal frequency, and provide, in a calibration operating phase, a second reference signal having a second reference signal frequency different from the first reference signal frequency. In addition, the RF feedback receiver arrangement includes a signal property detector configured to detect a transmit signal property of the transmit signal in the normal operating phase based on combining the first reference signal with a transmit signal or with a signal derived from the transmit signal, and to obtain, in the calibration operating phase, a calibration signal based on combining the second reference signal with the transmit signal or the signal derived from the transmit signal, which describes a disturbing portion introduced into the detected transmit signal property by the RF feedback receiver arrangement itself.

Abstract: A method (200) for detecting a periodic signal (141) in a noisy signal (101) is provided. The method can include applying (210) correntropy to the noisy signal to generate a non-linear mapping, and applying (220) a sub-space projection to the non-linear mapping to produce principal components. A correntropy kernel can be applied to the noisy signal to generate a Gram matrix that is used in a Temporal Principal Component Analysis (TPCA). The correntropy kernel projects nonlinearly the input data to a reproducing kernel Hilbert Space (RKHS) preserving the input time structure and attenuating impulsive noise. The correntropy kernel is data dependent, and the RKHS correlation matrix has the same dimension as the input data correlation matrix. A principal component having a majority of signal energy can be chosen (230) to detect the periodic signal.

Abstract: An integrated circuit comprises a frequency detector. The frequency detector comprises a timer state machine unit operably couplable to a timer and arranged to receive an incoming carrier signal; determine whether the incoming carrier signal comprises a valid frequency; generate a valid carrier indication when the incoming carrier signal is determined as having a valid frequency; and adjust the timer between at least a first timing mode of operation and a second timing mode of operation of the frequency detector in response to the determination.

Abstract: An RFID tag interrogator is described. The interrogator comprises a time-out circuit and an actuatable RF signal generator for transmitting an electromagnetic signal. Upon first actuation, the RF signal generator transmits a first electromagnetic signal having a first limited total continuous transmit time that is no longer than a predetermined transmit-time. That transmission is followed by an interim period of a defined length where the time-out circuit renders the interrogator incapable of transmitting the electromagnetic signal. The interim period is followed by the RF signal generator transmitting a second electromagnetic signal having a second limited total continuous transmit time that is no longer than the predetermined transmit time. The time-out circuit prevents the first, second and subsequent transmissions of the electromagnetic signal that are each no longer than the predetermined transmit time after a prior electromagnetic signal has been transmitted until the interim period has expired.

Abstract: Receivers, which may be external or implantable, are provided. Aspects of receivers of the invention include the presence of one or more of: a high power-low power module; an intermediary module; a power supply module configured to activate and deactivate one or more power supplies to a high power processing block; a serial peripheral interface bus connecting master and slave blocks; and a multi-purpose connector. Receivers of the invention may be configured to receive a conductively transmitted signal. Also provided are systems that include the receivers, as well as methods of using the same. Additionally systems and methods are disclosed for using a receiver for coordinating with dosage delivery systems.

Abstract: Antenna systems are used for transmitting common overhead channels (pilot, sync, and paging channels) over a whole sector while transmitting and receiving unique traffic channels on individual beams in the sector. Each beam in the sector is transmitted at a frequency offset from other beams in the sector. The offset frequency is chosen such that the effect of cancellation of the pilot channel caused by the summing of signals from multiple beams is minimized. Alternative, each beam in the sector can have a time dependent phase offset relative to each other to minimize the effect of cancellation of the pilot channel caused by the summing of signals from multiple beams. System capacity is substantially increased since the number of traffic carrying beams per sector is increased without using more pilot channel PN offsets. Beams are fixed and the same antennas are used for the overhead channels as the traffic channels, obviating the need for complex algorithms and calibration procedures.

Abstract: The following embodiments relate to an analog filter having an adjustable transfer function for use in a system or circuit that processes a signal having a changing data rate. The transfer function may be adjusted by adjusting the resistance and/or capacitance of components of the analog filter. The analog filter is calibrated based on an optimum operational parameter at a certain data rate, such as a median data rate. The analog filter may be further adjusted as the data rate of the signal changes.

Abstract: A wireless networking receiver with digital antenna switching selects an antenna with an 802.11b signal based on a signal metric, such as the highest signal quality or highest peak amplitude. In one embodiment, the receiver comprises a plurality of antennas that may each receive one of a plurality of RF signals conforming to the IEEE 802.11b standard. The receiver may have multiple antennas for use with the IEEE 802.11n standard, but may receive signals conforming to the 802.11b standard. The receiver also comprises a carrier sense circuit configured to calculate a signal metric for each of the signals and further configured to generate a selection signal signifying one of the signals, based on the signal metric. The receiver further comprises a multiplexer configured to output one of the signals, based on the selection signal.

Abstract: Receivers, which may be external or implantable, are provided. Aspects of receivers of the invention include the presence of one or more of: a high power-low power module; an intermediary module; a power supply module configured to activate and deactivate one or more power supplies to a high power processing block; a serial peripheral interface bus connecting master and slave blocks; and a multi-purpose connector. Receivers of the invention may be configured to receive a conductively transmitted signal. Also provided are systems that include the receivers, as well as methods of using the same. Additionally systems and methods are disclosed for using a receiver for coordinating with dosage delivery systems.

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 also relates to methods by which radio signals, modulated with data information, can be produced by a transmitter that consumes very little power. 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 method including: processing at a first processing frequency, such that each instance of processing is separated by a first processing time period, at least a first signal; increasing the processing frequency to a second processing frequency and switching from processing the first signal to processing a second signal; determining a parameter indicative of the quality of the second signal; and determining, within the first processing time period measured from the last instance of processing the first signal at the first frequency, which one or more signals to process at the next instance of processing by comparing respective parameters of at least the first and second signals.

Abstract: A radio opaque container for communication devices upon a vehicle has a bottom joined to four walls, a pivoting lid sealing upon the walls, a connector from the container to a vehicle, a locking mechanism keeping the lid closed, and circuitry between the locking mechanism and the vehicle that engages the locking mechanism only when the vehicle's electrical system is on. In an emergency, the contents within the container remain available to a vehicle operator but the container opens only when vehicle's electrical power has been turned off. The container forms at least one faraday cage around the contents and prevents equipment placed therein from activating and distracting a vehicle operator. In an alternate embodiment, the container includes a shelf therein.

Abstract: A method of operating a single-tuner radio includes tuning into a first frequency. A pause in a first signal associated with the first frequency is detected. Tuning is switched from the first frequency to a second frequency. A signal quality metric for the second frequency is measured. Tuning is switched from the second frequency to the first frequency.

Abstract: A method for a communication device includes determining whether a first radio frequency (RF) signal at a level of at least a first predetermined field threshold is detected. The method also includes generating a second RF signal at a level of at least a second predetermined field threshold greater than the first predetermined field threshold, when the communication device receives an instruction to generate the second RF signal and the determining determines that the first RF signal at the level of at least the first predetermined field threshold is not detected. The method further includes receiving a load modulated RF signal in response to the second RF signal.

Abstract: The invention discloses a dual frequency multiplexer by which a first and second coaxial harmonic oscillator type band pass filters are disposed in a box. The box includes a base body, a cover plate and a cover body. The two coaxial harmonic oscillator type hand pass filters are located on the base body and spaced each other by a metal plate; the multiplexer port, first and second ports are positioned on lateral side of the base body. The blocking capacitors are contained in the coaxial chamber of the two coaxial harmonic oscillator type band pass filters. The cover plate is secured on the base body; the first and second direct current circuits are placed on the cover plate; the low pass filters of the first and second direct current circuits are fixed on an edge of a top surface of the coaxial chamber by means of a support member; the cover body and the base body are fastened with each other. The blocking capacitors each are of distributed parameter capacitor.

Abstract: The receiver includes a low noise amplifier, a local signal generator, a first mixer, a second mixer, a first amplifier, a second amplifier, a first A/D converter, a second A/D converter, and a signal level detection unit. A detection signal from at least one terminal of the first A/D converter is supplied to an input terminal of the signal level detection unit, thereby generating a reception start signal from the output terminal. Before an RF reception signal is received, a first signal processing unit containing the first mixer, the first amplifier, and the first A/D converter is controlled to an active state, and a second signal processing unit containing the second mixer, the second amplifier, and the second A/D converter is controlled to a low power consumption state. After the RF reception signal is received, the second signal processing unit is controlled to the active state.

Abstract: A method for compensating a transceiver for impairments includes transmitting a plurality of partial bandwidth training signals using a transmitter. A plurality of response signals of a receiver having a bandwidth and exhibiting receiver impairments is captured. Each response signal is associated with one of the partial bandwidth training signals. Each of the partial bandwidth training signals is associated with a portion of the receiver bandwidth. A plurality of partial compensation filters is generated based on the plurality of response signals. Each partial compensation filter is associated with one of the response signals. The partial compensation filters are combined to configure a receiver compensation filter operable to compensate for the receiver impairments.

Abstract: An apparatus and method for detecting solid-state electronic devices are described. Non-linear junction detection techniques are combined with spread-spectrum encoding and cross correlation to increase the range and sensitivity of the non-linear junction detection and to permit the determination of the distances of the detected electronics. Nonlinear elements are detected by transmitting a signal at a chosen frequency and detecting higher harmonic signals that are returned from responding devices.

Abstract: The following embodiments relate to an analog filter having an adjustable transfer function for use in a system or circuit that processes a signal having a changing data rate. The transfer function may be adjusted by adjusting the resistance and/or capacitance of components of the analog filter. The analog filter is calibrated based on an optimum operational parameter at a certain data rate, such as a median data rate. The analog filter may be further adjusted as the data rate of the signal changes.

Abstract: A receiver includes a first terminal for receiving an RF signal having a frequency of less than approximately 60 MHz, a second terminal, and a receive path having an input coupled to the first terminal and an output for providing a demodulated RF signal. The receiver further includes a detector coupled to the receive path for detecting a signal parameter in the RF signal and a controller coupled to the detector and to the second terminal. The controller provides the multiplex signal in a tuning state to the second terminal to selectively provide one of a first RF signal and a second RF signal to the first terminal and to determine at least one of a first parameter of the first RF signal and a second parameter of the second RF signal. The controller provides the multiplex signal in an operating state based on the first parameter and the second parameter.

Abstract: A wireless networking receiver with digital antenna switching selects an antenna with an 802.11b signal based on a signal metric, such as the highest signal quality or highest peak amplitude. In one embodiment, the receiver comprises a plurality of antennas that may each receive one of a plurality of RF signals conforming to the IEEE 802.11b standard. The receiver may have multiple antennas for use with the IEEE 802.11n standard, but may receive signals conforming to the 802.11b standard. The receiver also comprises a carrier sense circuit configured to calculate a signal metric for each of the signals and further configured to generate a selection signal signifying one of the signals, based on the signal metric. The receiver further comprises a multiplexer configured to output one of the signals, based on the selection signal.

Abstract: A severe weather alarm configured for actuation by the occurrence of a single type of weather phenomena is disclosed. In one embodiment an alarm includes a portable housing; an audio siren configured to actuate upon an occurrence of a predetermined event; a receiver to receive signals and Specific Area Message Encoding (SAME) messages at one or more National Weather Service (NWS) weather radio frequencies; a digital decoder coupled to the receiver and configured to filter out all SAME messages except for a single weather warning message event code and a Required Weekly Test (RWT) code; a processor coupled to the receiver and the digital decoder to control the receiver and decoder and to actuate the audio siren upon the occurrence of the predetermined event; a power source; and a memory for storing signal values, frequencies, message values, and geographical codes.

Abstract: A plurality of phases of sniff operations are performed for detecting wake-up signals being received by an implantable medical device (IMD), including a phase that performs a staged detection of whether the integrated frequency deviation of a received signal is outside of an expected frequency deviation range, where sniff operations are aborted if the integrated frequency deviation of the received signal falls outside of corresponding high and low thresholds in any stage, wherein the difference between the high and low thresholds tightens with each subsequent stage and an average frequency deviation over all completed stages are used in the calculations. One phase of sniff operations includes a dual frequency modulation (FM) detector including a first FM detector that introduces a small delay in a received signal providing an average frequency estimate and a second FM detector having a larger delay that is adjusted based on the estimated average frequency.

Abstract: Methods and apparatus for detecting the presence of electronic communications devices, such as cellular phones, are disclosed. In an exemplary method, a complex radio frequency stimulus is transmitted into a target area, and nonlinear reflection signals received from the target area are processed to obtain a response measurement. The response measurement is compared to a pre-determined filter response profile to detect the presence of a radio device having a corresponding filter response characteristic. In some embodiments, the pre-determined filter response profile comprises a pre-determined band-edge profile, so that comparing the response measurement to a pre-determined filter response profile comprises comparing the response measurement to the pre-determined band-edge profile to detect the presence of a radio device having a corresponding band-edge characteristic.

Abstract: There is provided a high-rate wireless receiving apparatus which can effectively receive a wireless signal even in a Non-Line of Sight state by using a millimeter-wave band (e.g., 60 GHz) or a THz frequency band (100 GHz or above). The high-rate wireless receiving apparatus includes an antenna receiving a high-rate wireless signal, a radio frequency processing unit processing the high-rate wireless signal received from the antenna to thereby generate a base-band signal, a base-band processing unit processing the base-band signal to thereby generate information data included in the high-rate wireless signal, and a reception information data storing unit storing the information 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: RF switching devices are provided that alternatively couple an antenna to either a transmitter amplifier or a receiver amplifier. An exemplary RF switching device comprises two valves, one for a receiver transmission line between the antenna and the receiver amplifier, the other for a transmitter transmission line between the antenna and the power amplifier. Each valve is switchably coupled between ground and its transmission line. When coupled to ground, current flowing through the valve increases the impedance of the transmission line thereby attenuating signals on the transmission line. When decoupled from ground, the impedance of the transmission line is essentially unaffected. The pair of valves is controlled such that when one valve is on the other valve is off, and vice versa, so that the antenna is either receiving signals from the power amplifier or the receiver amplifier is receiving signals from the antenna.

Abstract: A system for testing radio frequency (RF) communications of a device capable of such communications is provided. The system includes a chamber for isolating the device from RF interference, an antenna that is suitable for RF communications with the device wherein the antenna is capable of communications over a range of frequencies, the antenna being located within the chamber, and a digital communication link for providing non-RF communications with the device.

Abstract: A system for recovering a signal of interest from a complex signal is provided. The system includes a plurality of different oscillators. Each of the plurality of oscillators is configured to facilitate improving a signal-to-noise ratio of an input complex signal by adjusting an oscillation frequency of each of the plurality of oscillators based on an input frequency of interest of the input complex signal.

Abstract: There are provided a sampling mixer, quadrature demodulator, and a wireless device capable of suppressing receiving sensitivity degradation caused by alias components or second-order distortion components. In the sampling mixer (101), a sampling switch (5) and another sampling switch (36) sample a reception signal based on a local signal with a predetermined frequency. A control signal generator (15) generates a control signal for controlling a filter operation. An in-phase mixer (2) and a reverse-phase mixer (3) perform, based on the control signal, filter processing on the sample signal obtained by the sampling switch (5). A delay controller (117) controls the phase difference between the local signal and the control signal according to a reception-desired frequency.

Abstract: The invention proposes an LNB using two transposition frequencies chosen on either side of the reception band so as to obtain a transposition of supradyne type and a transposition of infradyne type according to the frequency used. This choice of transposition frequencies makes it possible to have an overlap zone in the middle of the reception band which is transposed with the aid of the two oscillation frequencies but at different frequencies. This makes it possible to choose between the two transpositions in the case where the frequency transposed with the aid of an oscillator corresponds to a particularly noisy frequency.

Abstract: A receiving device is disclosed. The receiving device includes a receiving module and a processing module. The receiving module includes a plurality of parameters. The receiving module is used for setting the parameters according to a control signal, receiving a wireless signal according to settings of the different parameters, and outputting a first output signal and a second output signal separately. The processing module couples the receiving module and generates the control to set the parameters according the first output signal and the second output signal.

Abstract: A high frequency module includes: a line substrate having a first high-frequency signal line on a first surface thereof and a second high-frequency signal line on a second surface being a surface on the opposite side of the first surface, the second high-frequency signal line being electrically connected with the first high-frequency signal line; and a base substrate which is provided to the second surface of the line substrate, and which is formed in a manner that the base substrate is located away from the second high-frequency signal line.

Abstract: An integrated front-end filter for a tuner provides an array of from several to a multitude of passbands, each for passing at least one but less than all channels designated in a band of frequencies. Each passband is exclusively selectable. The integrated front end filter includes at least one active filter unit with an active reactance element in either of fixed and variable filter configurations and a decoder coupled to said at least one active filter unit and being responsive to a control signal for selecting a one of the passbands. In one example a multitude of active filter units of fixed filter configuration provide the multitude of passbands. Each data is stored at a predetermined location and reproduced in response to a corresponding control data signal from a tuner controller. Each data characterizes one of the plurality of passbands. The filter element is switchable from one passband to another in response to the control data signal.

Abstract: A function processing unit includes a control-signal input/output unit to which a control signal indicating that radio data for a semiconductor device is transmitted is input by a cable signal, and a reset-signal input unit to which a reset signal instructing reset of the function processing unit is input by a cable signal, and when the reset signal is input, performs a reset process according to the reset signal. A radio-communication processing unit includes a radio-communication-processing-reset-signal input unit to which a radio communication processing reset signal instructing reset of the radio-communication processing unit is input by a cable signal, when the radio communication processing reset signal is input, performs a reset process according to the radio communication processing reset signal, and receives the radio data only when the control signal is input.

Abstract: A wireless network device includes a correlation module, an automatic gain control module, and a control module. The correlation module correlates a predetermined portion of a radio frequency (RF) signal and generates a correlation signal based thereon. The automatic gain control (AGC) module generates a gain control signal based on said RF signal. The control module selectively determines whether said RF signal is a radar signal based on said correlation signal and said gain control signal.

Abstract: The present invention is a novel device, system, and method for determining the damped natural frequencies of a dynamic system whose characteristics are available in the form of a “frequency response function” FRF. According to an exemplary embodiment of the present invention, the method identifies the dampened natural frequencies associated with the poles and zeros of a transfer function. The method is especially useful for analysis of measurements that contain some degree of contamination due to noise or non-linear effects. It is based on a set of rules that may be more successful than a direct approach based on a least squares criteria.

Abstract: A method and an arrangement for testing a radio device without radiation losses are provided. The arrangement comprises a waveguide closed at both its ends and comprising a holder arranged to hold the radio device at least partly inside the waveguide in such a manner that the radiating part of the radio device remaining outside the waveguide is entirely inside the holder. The arrangement also comprises at least one coupling inside the waveguide for transmission and reception of a radio-frequency signal.