Abstract: A Radio Frequency (RF) transceiver includes a baseband processor, a receiver section, and a transmitter section. The receiver section communicatively couples to the baseband processor and includes a plurality of tuned RF circuits. The transmitter section communicatively couples to the baseband processor and includes a plurality of tuned RF circuits. In a calibration operation, the transmitter section applies a RF test signal to its plurality of tuned RF circuits. The baseband processor applies a plurality of tuning control settings to each the tuned RF circuit. The baseband processor, for each of the plurality of tuning control settings, measures an output of the tuned RF circuit. The baseband processor selects a tuning control setting for the tuned RF circuit based upon at least one measured output of the tuned RF circuit. Finally, the baseband processor is operable to apply a selected tuning control setting to the tuned RF circuit.

Abstract: A method for compensating the axial ratio of an antenna for testing radio-frequency identification (RFID) tags and an apparatus using the method are provided. The method includes the following steps. An initial location of the RFID tag (or a tagged product) is set to obtain an initial vector. The RFID tag and the antenna are respectively rotated with a first axis and a second axis to detect characteristics of the RFID tag in all directions, and the first axis and the second axis are perpendicular. A polarization angle of the RFID tag is calculated according to the initial vector of the RFID tag and a location of the RFID tag after rotation. A compensation value is obtained through a look up table according to the polarization angle, so as to compensate for the axial ratio of the antenna.

Abstract: A radio station connected to another radio station via a radio link and identifying a fault of the radio link, including: a radio link controlling unit, a statistical information acquiring unit and a fault identifying unit wherein the radio link controlling unit executes radio link control of the radio link in accordance with a radio link control scheme, the statistical information acquiring unit acquires statistical information indicating a state of the radio link during the execution of the radio link control, and the fault identifying unit identifies the fault of the radio link from among a plurality of faults associated with statistical information, on the basis of the statistical information acquired by the statistical information acquiring unit.

Abstract: An integrated RF device includes at least one RF amplifier configured to be electrically coupled alternatively to a selected one of a RF signal input and a RF test source. A first mixer stage includes a first local oscillator and is electrically coupled to the at least one RF amplifier. At least one second mixer stage includes a second local oscillator and is electrically is coupled to the first mixer. The at least one baseband amplifier is electrically coupled to the second mixer. At least a selected one of the RF amplifier and the baseband amplifier has at least one actuator and at least one actuator terminal configured to provide an actuator setting. A method to self-heal an integrated RF receiver device is also described.

Abstract: A method and apparatus for testing a polar transmitter uses at least one square wave waveform as test stimuli replacing a multitone waveform. Each square wave signal is coupled one at a time to a frequency modulating input of the polar transmitter. The output of the polar transmitter is analyzed by observing the amplitude and frequency of the demodulated components corresponding to each square wave signal.

Abstract: A robust method of page indication (PI) detection improves the probability of detecting a transmitted PI under conditions that decrease the probability of accurate PI detection. The method includes choosing a standard value of a PI threshold against which to compare accumulated PI bits when the probability of correctly detecting the PI is high, and choosing a derived value of the PI threshold lower than the standard value when the probability of correctly detecting the PI is low. The derived PI threshold value determination includes a factor indicative of a desired probability of accurate PI detection.

Abstract: In accordance with an embodiment of the invention, there is provided an antenna coupler for providing a radio frequency interface between a radio frequency electronic system of a unit under test and automatic test equipment for the radio frequency electronic system. The antenna coupler comprises a mechanical interface to secure the antenna coupler to an antenna site of the unit under test, and a radio frequency signature storage component comprising a stored representation of a radio frequency signature comprising radio frequency test output.

Abstract: A communication system includes a trainee communications device and one or more trainer communications devices. The trainee communications device announces a first period of time for beamforming training, switches a receiving antenna pattern to a sector and stays in the sector for a second period of time. The trainer communications devices transmit one or more predetermined bit sequences in the first period of time. The predetermined bit sequences are transmitted in at least one sector. Each of the predetermined bit sequences carries an identifier identifying the transmitting trainer communications device.

Abstract: The invention relates to a wireless remote controlled device selection system for selecting devices. Signal processing provides information for a remote control device. This information is indicative of the angle between the remote control device and the various devices from which a device should be selected. By analyzing the angular deviations, the desired device can be selected.

Abstract: A method for dynamically reconfiguring a regulation-compliance mode of a device, belonging to a wireless network and operating under a network-operation mode (311, 321, 322) in a spectrum band with primary users. The method includes periodically determining at least one of: a primary protection capability of the device (501, 502, 704, 705), availability of enabling signal to the device (601, 701), and a frequency of location change of the device (508, 510, 711, 712); and based on the results of such determinations, operating and configuring transmission parameters of the device according to one of a plurality of regulation-compliance modes that are supported by the device.

Abstract: A method and device provides for the testing and validation of a control module for receiving wireless data and communications utilizes a transmission line coupler mounted proximate the control module generates a signal that couples to an antenna of the control module. The control module produces a signal in response to coupling of the antenna with the signal produced by the transmission line coupler. The resulting signal is utilized to check, verify and validate operation of the control module.

Abstract: In a load testing system, a transmission device measures a bandwidth of user data transmitted from a user terminal in real time, calculates a calculation bandwidth by subtracting the bandwidth of the user data from an evaluation bandwidth preset to evaluate the performance of a network, and transmits test data corresponding to the calculation bandwidth with the user data corresponding to the bandwidth of the user data. A reception device receives the user data and the test data transmitted with the user data, and evaluates the performance of the network based on the user data and test data.

Abstract: The invention relates to a splitter (40) of an indoor cellular network, with a plurality of antennas transmitting downlink signals and receiving uplink signals, the splitter (40) distributing power to said plurality of antennas for a transmission of the downlink signals. The splitter adapts the signal power of the downlink signal for one antenna in accordance with the uplink signal received at said antenna.

Abstract: What is disclosed is a test device for a wireless repeater system in a wireless communication network. The test device includes a transmitter configured to establish a call with the wireless communication network through the wireless repeater system and determine a number of probes required to establish the call. The test device also includes a receiver configured to receive the call from the wireless communication network through the wireless repeater system and determine a signal strength of the received call. The test device also includes a control processor configured to process the number of probes required to establish the call and the signal strength of the received call to determine a gain level for the wireless repeater system. The test device also includes a control interface configured to transfer the gain level to the wireless repeater system.

Abstract: A method for adapting the signal transmission between two electronic devices (1, 2) that are connected to each other via a physical interface and that each have a transmitter (8a, 8b) and a receiver (7a, 7b), wherein analog signals are transmitted from the transmitter (8a, 8b) of one device (1, 2) along a transmission path (9a, 9b) to the receiver (7a, 7b) of the other device (1, 2). Known scattering parameters (10a, 10b, 10c, 11d) for describing the electromagnetic wave propagation in the transmission path (9a, 9b) between the receiver (7a, 7b) of the first device (1, 2) and the transmitter (8a, 8b) of the second device (1, 2) are retrieved by the first device (1, 2), transmitted to the second device (1, 2), and parameters of the transmitter (8a, 8b) in the second device (1, 2) are adapted with reference to a high-frequency description of the transmission path (9a, 9b) as a function of all of the scattering parameters (10a to 10d, 11a to 11d) known to the two devices.

Abstract: The invention relates to a method and a system for calibrating an analogue I/Q-modulator (2) of a transmitter (3), wherein a calibration signal (s(tk)) is transmitted and an in-phase signal (sI(tk)) and a quadrature-phase signal (sQ(tk)) of the calibration signal (s(tk)) are adjusted by at least one predetermined compensation coefficient (C, D, E) in two calibration steps in at least one compensation measurement set (un, Vn, Wn), whereby: —in a first calibration step, the calibration signal (s(tk)) is adjusted by a first complex compensation value (Cn,1, Dn,1, En,1) and an output signal of the detector circuit (20) is correlated with a harmonic (H1, H2) of said calibration signal (s(tk)) to yield a first complex compensation measurement result (un,1, Vn, 1, Wn,1), —in a second calibration step, the calibration signal (s(tk)) is adjusted by a second complex compensation value (Cn,2, Dn, 2, En,2) and the output signal of the detector circuit (20) is correlated with said harmonic (H1, H2) of said calibration sig

Abstract: A mobile communication system in which a mobile station apparatus transmits reception quality information to a base station apparatus, the reception quality information indicating quality of a signal received from the base station apparatus, characterized in that the base station apparatus transmits information for instructing transmission of reception quality information without uplink data included in an uplink data transmission permission signal, and the mobile station apparatus transmits reception quality information without uplink data according to the information for instructing transmission of reception quality information without uplink data.

Abstract: I/Q gain and phase mismatches of both transmit and receive paths of an OFDM FDD transceiver are simultaneously estimated. An up-converted RF signal is generated when the transmit path performs IQ modulation on a reference signal having a single sideband tone. The up-converted RF signal is sent via a loop-back path to the receive path. A down-converted evaluation signal is generated when the receive path performs IQ demodulation on the up-converted RF signal. The single evaluation signal is used to determine the transmit path gain and phase mismatches and the receive path gain and phase mismatches. The four I/Q mismatches are estimated without using significant hardware nut otherwise used in the regular transmission of data signals. The I/Q mismatches in data signals are corrected by pre-processing the up-converted RF signals and post-processing the down-converted RF signals by adding attenuated components of the in-phase and quadrature-phase signals to each other.

Abstract: Receivers using multiple tuners may introduce crosstalk between signals provided to the tuners. The disclosed embodiments relate to a method and apparatus for detecting and preventing crosstalk. A method is described that includes providing a signal to a first signal processing path, tuning to a channel in the signal provided through the first signal processing path, tuning to the channel in the signal through a second signal processing path, and determining that crosstalk exists if the channel is present on the second signal processing path. An apparatus is also described containing means for providing a signal to a first signal processing path, tuning to a channel in the signal provided through the first signal processing path, tuning to the channel in the signal through a second signal processing path, and determining that crosstalk exists if the channel is present on the second signal processing path.

Abstract: A test equipment for testing a wireless communication device includes a wireless transceiver, memory, and a controller. The wireless transceiver transmits a first and second series of packets. The wireless transceiver receives a power level indicator that is based on at least one of the first series of packets. The memory stores the power level indicator. The controller performs a signal strength test. More specifically, the controller controls the transceiver to transmit the first series of packets at a first power level. The controller stores the power level indicator in memory when the power level indicator is received by the transceiver. The controller controls the transceiver to transmit the second series of packets at a second power level.

Abstract: A technique for locating a device uses connectivity to find a distance between an access point (AP) and a device. The AP transmits a frame to a device and receives an acknowledgement frame from the device. The amount of time for a signal to pass between the AP and the device is estimated and multiplied by the speed of light to find the distance between the AP and the device.

Abstract: Techniques for self-calibration of transceivers are described herein.

Abstract: A method measures a time from transmitting a ranging signal to receiving the ranging signal via a channel of a wireless network, and a received signal strength (RSS) of the ranging signal. A distance is estimated based on the time, and a path loss based on the RSS. Probabilities of conditions of the channel are estimated based on the distance and the path loss, wherein the condition is in one of line-of-sight (LOS), or non-LOS (NLOS).

Abstract: A testing system and measuring method thereof for measuring wireless network signal are provided. The testing system comprises a control switch, a first base station emulator and a signal measurer. The first base station emulator and the signal measurer connect to the control switch respectively. A device under test (DUT) connects with the testing system via the control switch. The first base station emulator transmits a first channel setting signal to the DUT via the control switch so that the DUT can communicate with the testing system via a first channel. The first base station emulator transmits a plurality of first testing messages to the DUT via the control switch so that the DUT can transmit a plurality of first response messages back according to the first testing messages. The control switch further receives the first response messages from the DUT and then transmits them to the first base station emulator and to the signal measurer at the same time.

Abstract: A mobile station receives dedicated signaling from the network to obtain measurement configuration data specified for it. The measurement configuration data stored in the mobile station include: measurement object elements each designating communication resources on which measurements are requested by the network; reporting configuration elements each defining reporting criteria to trigger a measurement report from the mobile station to the network and a reporting format indicating at least one quantity included in the measurement report; and measurement identity elements each identifying a relationship between a measurement object element and a reporting configuration element such that any measurement report sent from the mobile station in accordance with this reporting configuration element includes at least one quantity measured on communication resources designated by the corresponding measurement object element.

Abstract: An apparatus and a method for determining a Channel Quality Indicator (CQI) using a beamforming in a multi-antenna system are provided. A transmitter for determining a CQI based at least partly upon the beamforming in the multi-antenna system includes a beam former for distinguishing frequency tone intervals having a constant channel across an entire frequency tone, forming a beam by multiplying frequency tones of the frequency tone interval having the constant channel by different beamforming weights, and transmitting a preamble signal. Hence, the users can be scheduled based at least partly upon the beamforming gain, and throughput can be enhanced through the practical MCS selection.

Abstract: A processing unit transmits, from at least one of a plurality of antennas, data corresponding respectively to the plurality of antennas. A control unit generates request signals with which to let a second radio apparatus supply information on rates at the second radio apparatus. When transmitting the request signal, the processing unit also transmits, from a plurality of antennas which includes antennas other than the antennas that transmit the data, known signals corresponding respectively to the plurality of antennas.

Abstract: A transmission source device transmits a test signal to a transmission destination device and a transmitting device by wireless communication. The transmission destination device and the transmitting device add to a received test signal an identification number thereof and a receiving time and return the data-added test signal to the transmission source device. The transmission source device determines a communication route with a shortest communication time based on the received data-added test signal. The transmission source device transmits logic-circuit update data to the transmission destination device via the determined communication route.

Abstract: One embodiment relates to a radio frequency (RF) communication device. The RF communication device includes an antenna interface coupled to an antenna that exhibits a time-varying impedance. The RF communication device also includes a test interface coupled to RF test equipment that exhibits a test impedance. A tuning circuit in the RF communications device selectively provides a matched impedance to either the time-varying impedance or the test impedance based on feedback derived from the test interface. Other methods and systems are also disclosed.

Abstract: A two-element array antenna system includes a first antenna element and a second antenna element. A transmitting, receiving, and processing (TRP) system is coupled to the first and second antenna elements via, respectively, a single first transmission element and a single second transmission element. The first and second transmission elements have respective transmit-path and receive-path functionality. The TRP system is configured to determine an amplitude offset and phase offset associated with the transmit-path functionality of the first and second transmission elements, and, based on data obtained during the determination of amplitude offset and phase offset associated with the transmit-path functionality of the first and second transmission elements, determine an amplitude offset and phase offset associated with the receive-path functionality of the first and second transmission elements.

Abstract: A method and mobile diagnostic measurement tool is described for collecting cellular network performance data. The method includes determining a current data rate for transmission of data between the measurement tool and a network node in a cellular network. The measurement tool includes a controller adaptively controlling the collection of network performance data by one or more data collection units in the measurement tool in accordance with variations in the current data rate. The collection of data is controlled so as to keep the total rate of collection of data to be less than or equal to the rate at which the data is transmitted to the network node. A memory in the tool may stored log mask tables which indicate which types of performance data can eliminated in the collection process depending on the transmit data rate.

Abstract: A method and system use the mutual coupling property of multiple antenna elements for measuring differences in propagation time among various signal paths involving antenna elements in a radio frequency transmit/receive system. The method and system alleviate the need for external test equipment by using the same hardware used in standard operation of the transmit/receive system for performing propagation time measurement through the generation, mutual coupling, and acquisition of a specially selected reference signal. In an embodiment involving calibration of various signal paths to realize matched propagation times, the signal energy returned through these various paths during standard system operation arrives for acquisition more closely coincident in time, increasing the instantaneous bandwidth of the system.

Abstract: Systems and methods are provided for tracing parameters indicative of performance of a mobile device that is not tethered to a host computer. The mobile device is instructed to monitor a performance characteristic when the mobile device is not tethered to the host computer. The instructions may be to trace the characteristic at a certain point, for a span in the future, under certain conditions, or at all times. When the mobile device is later tethered to the host computer, the traced parameter data is transferred to the host computer. Applications that decrease performance, as indicated by the traced parameters, may be debugged or optimized. The behavior of the mobile device before, during, and after tethering to the host computer or to a second device may be observed. The performance of a plurality of untethered mobile devices may also be traced, transferred, and compared.

Abstract: A system and method for determining a signal propagation delay between a transmitter and a receiver, and for adjusting a transmission time based on the propagation delay. A central station inserts a marker into a transmitted signal at a time corresponding to a received timing signal. The MCT receives the signal from the central station and determines a time difference between receipt of the marker and the detection of the time interval event. A transmission by the MCT is adjusted by an amount of time proportional to the time difference.

Abstract: A system and method of testing call performance of a plurality of mobile telephones is provided. In one embodiment the method comprises storing in a memory of a test device, data for one or more test scenarios that each comprises associated test parameters for attempting a plurality of telephone calls, establishing a first Bluetooth connection between the test device and a first mobile telephone, and concurrently with said first Bluetooth connection, establishing a second Bluetooth connection between the test device and a second mobile telephone. The method further comprises transmitting commands to the first and second mobile telephones via the Bluetooth connections to cause the mobile telephones to attempt to establish a plurality of telephone calls of the test scenarios, and monitoring the plurality of telephone calls of the mobile telephones to determine test results data.

Abstract: A system and method for providing integrated voice quality measurements for wireless networks, based on actual calls made by end devices, are provided. The system includes a plurality of end devices, each of which includes an algorithm for determining voice quality data; an over-the-air server configured to enable voice quality reporting in the end devices; a messaging server configured to receive voice quality reports from the end devices; a voice quality server configured to receive the voice quality reports from the messaging server and consolidate the voice quality reports; and a call data record server configured to combine call records and the consolidated voice quality reports.

Abstract: A receiver includes a plurality of RF receiver modules, a plurality of analog baseband sections, a plurality of analog to digital conversion sections, and a digital baseband processing module. The RF receiver modules convert inbound RF signals into a plurality of inbound analog signals. When the receiver is in a first mode, one of the plurality of analog baseband sections is active to adjust one of the plurality of inbound analog signals to produce an adjusted inbound analog signal; one of the plurality of analog to digital conversion sections converts the adjusted inbound analog signal into an inbound digital signal; and a portion of the digital baseband processing module is active to convert the inbound digital signal into inbound data.

Abstract: A method of correcting the frequency response of an RF receiver having a frequency translation device and a fixed IF frequency section uses calibration data representing frequency responses over a wide frequency range for multiple center frequencies. The calibration data are based upon a multi-dimensional model for the frequency translation device that includes at least center frequency and offset frequency. The calibration data are stored in the RF receiver during factory calibration. A run-time normalization of the RF receiver produces a normalization frequency response at a reference frequency, and a relative frequency response at a desired center frequency is derived from the calibration data. The normalized and relative frequency responses are combined to produce an overall frequency response that is used by the RF receiver to configure an inverse filter to correct channel linear distortion produced by the frequency response of the frequency translation device at the desired center frequency.

Abstract: A RF data communication device operates in at least two states. In a first state, the device transmits a response to an RF transmission if specific data therein represents an inquiry as to the presence of one or more RF data communication devices and if specific data therein corresponds to a class maintained by the device. The device does not transmit a response if specific data in the RF transmission is not representative of an inquiry as to the presence of one or more RF data communication devices, or if specific data therein does not correspond to at least one maintained class. In a second state, the device does not transmit a response when specific data is included therein that is representative of an inquiry as to the presence of one or more RF data communication devices and specific data therein corresponds to at least one maintained class.

Abstract: A test system for adjusting a wireless communication device by impedance loading features includes a power supply for generating a plurality of voltages, a test fixture coupled to the power supply for generating impedances corresponding to a plurality of impedance loading areas, a test equipment coupled to a test point of the wireless communication device via the test fixture for measuring a plurality of radio frequency characteristic sets of the wireless communication device, and a decision device coupled to the test equipment for determining an optimal impedance loading area of the wireless communication device according to the plurality of radio-frequency characteristic sets.

Abstract: A Radio Frequency (RF) transceiver includes a first RF transceiver group, a second RF transceiver group, local oscillation circuitry, and calibration control circuitry. Each of the RF transceiver group has an RF transmitter and an RF receiver. The local oscillation circuitry selectively produces a local oscillation to the first RF transceiver group and to the second RF transceiver group. The calibration control circuitry is operable to initiate calibration operations including transmitter self calibration operations, first loopback calibration operations, and second loopback calibration operations. During loopback calibration operations, test signals produced by an RF transceiver group are looped back to an RF receiver of another RF transceiver group.

Abstract: A method, system, and device provide asymmetric round-trip-time (RTT) ranging with multipath correction. A RTT ranging determination using the resulting composite received signal contains multipath error, and compensation or correction of this error in a manner compatible with low-power, low-complexity devices, such as tag devices, is provided.

Abstract: A base station apparatus, in a mobile communication system comprised of a plurality of base station apparatuses for performing transmission using mutually different frequency bands and a mobile station apparatus capable of concurrently communicating with each of the base station apparatuses, makes a determination whether the mobile station apparatus needs to perform Inter-Frequency Measurement to communicate with the plurality of base station apparatuses, and when Inter-Frequency Measurement is needed, based on the number of frequency bands of base station apparatuses that concurrently communicate with the mobile station apparatus and the number of frequency bands that the mobile station apparatus is capable of concurrently receiving, selects one of a first Inter-Frequency Measurement method without the need for providing a measurement gap in one of the frequency bands, and a second Inter-Frequency Measurement method with the need for providing a measurement gap in one of the frequency bands.

Abstract: A method for requesting and reporting channel quality information (CQI) in a wireless portable Internet system is disclosed. Timing of a channel quality information request by a base station is determined, existence of an automatic repeat request acknowledgment (ARQ_ACK) message of downlink data is determined on requesting the channel quality information from the subscriber station, the automatic repeat request acknowledgment message and the radio resource for the channel quality report to the subscriber station is allocated, the automatic repeat request acknowledgment message and the channel quality report information is received, and a modulating and coding level of downlink data is determined by extracting the channel quality report information from the automatic repeat request acknowledgment message.

Abstract: A method for controlling power in a communication system. A base station allocates Channel Quality Information Channels (CQICHs) to at least one mobile station, transmits CQICH information for the allocated CQICHs, and transmits power control information to the mobile stations to which the CQICHs are allocated. A mobile station receives CQICH allocation information, receives power control information, and detects the power control information allocated to the mobile station by using the CQICH allocation information.

Abstract: A method of generating a noisy receive signal for testing the performance of a mobile wireless communication device is described. A signal generator unit generates a transmit signal that frequency hops among a set of carrier frequency channels in a cyclic pattern having a time duration T. A wireless channel emulator unit generates a receive signal by modifying the transmit signal and also generates an interference signal by modifying the receive signal. The wireless channel emulator unit delays the interference signal relative to the receive signal by an integer multiple of the time duration T. The receive signal and the interference signal are combined by a combiner unit to generate the noisy receive signal.

Abstract: A simulation testing system for a mobile communication apparatus and a simulation testing method thereof are disclosed. The simulation testing system comprises a first mobile communication device and a second mobile communication device. The first mobile communication device comprises a first command processing module and a data processing module. The first command processing module sends an attention command. The second mobile communication device comprises a second command processing module, having a simulation unit for receiving the attention command and simulating a modulator/demodulator to transmit a simulation connection command. After the first mobile communication device receives the simulation connection command, the data processing module sends the testing data to the second mobile communication device. Compared with previous testing system of a mobile communication apparatus, the simulation testing system does not need a network.

Abstract: This disclosure discloses methods and apparatus for calibrating received signal strength indicators.

Abstract: The present invention discloses a method of multiple systems sensing for coexisting radio networks, including: performing energy detection and carrier locking; detecting the fundamental frequencies; and identifying the corresponding active systems from the detected fundamental frequencies and the evaluation of the estimated power spectrum density vector or the estimated trispectrum matrix. Based on the method, an apparatus capable of multiple systems sensing is presented. Furthermore, the present invention also provides an apparatus of multiple systems sensing for coexisting radio networks.

Abstract: A multi-path simulation system (100) includes a signal generator (10) generating a signal, a power divider (24) connected to the signal generator for dividing the signal into N attenuated sub-signals, N delay lines (26) connected to the power divider delaying the N attenuated sub-signals to simulate the delays resulting from the transmission of the signal in the N paths, P switches (28) connected to the delay lines selecting the attenuated sub-signals delayed by the delay lines, thereby generating selected signals, and a signal combiner (29) connected to the switches combining the selected signals into a single signal. The delay lines are respectively represented by transmission lines disposed on a printed circuit board. A length of the transmission line controls a distance of transmission of the signal. Wherein N is an integer greater than one, and P is an integer equal to or greater than one.