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| Number | Title | Issue Date |
| 8010064 | Systems and methods for transmitter calibration Systems and methods may be provided for transmitter calibration. The systems and methods may include providing one or more radio frequency (RF) test signals at an output of a transmitter, wherein the one or more RF test signals are based upon IQ baseband test signal... | 08/30/2011 |
| 8005443 | Design for testability circuitry for radio frequency transmitter circuitry The present invention is design for testability (DFT) circuitry used with RF transmitter circuitry to enable RF parameter adjustments, which provide compliance with requirements, to configure the RF transmitter circuitry for a particular application or range of appl... | 08/23/2011 |
| 7965991 | Phase calibration for multiple transmitter systems A method, wireless communication device, and a base station calibrate relative phase of a plurality of output signals from respectively combined plurality of transmitters (302, 204) in the wireless device (102, 108). An output of a combiner (346... | 06/21/2011 |
| 7904035 | Calibration system and method in a communications device A radio frequency (RF) communications device is provided. The RF communications device includes transmitter circuitry configured to generate a calibration signal on a signal line coupled to an antenna port in a calibration mode of operation and an RF output signal f... | 03/08/2011 |
| 7831223 | Automatic adjustment circuit for amplitude of differential signal An automatic adjustment circuit for amplitude of differential signal has a differential signal transceiver that transmits differential signals, an amplitude setting register in which plural setting values for setting amplitude of the differential signals are stored,... | 11/09/2010 |
| 7792502 | Method and system for measuring and optimizing integrated antenna performance Methods and systems for measuring and optimizing integrated antenna performance are disclosed and may include transmitting FM signals over a range of frequencies utilizing one or more antenna configurations. The FM transmitter may be calibrated based on a signal rec... | 09/07/2010 |
| 7643803 | Power estimation of a transmission Embodiments of power estimation of a transmission are presented herein. ... | 01/05/2010 |
| 7634239 | Generator for agile frequency signals The subject of this patent is a system to generate RF frequency hopped signals that can be used to test radio receivers over the range of their signal specifications. The hop sequence and symbols in the signal is decoded from signals transmitted by the same or diffe... | 12/15/2009 |
| 7415246 | Attenuation of high-power inbound RF signals based on attenuation of a T/R switch A method for determining attenuation of a transmit/receive switch for attenuating inbound RF signals begins by enabling the transmit/receive switch to provide a loop back configuration between a transmitter section and a receiver section of a radio frequency integra... | 08/19/2008 |
| 7409191 | Transmitting apparatus employing online calibration A transmitting apparatus includes a plurality of antenna elements, user signal output unit, calibration signal generation unit, antenna signal processing unit, and total transmission power measuring unit. The user signal output unit weights a user signal by an anten... | 08/05/2008 |
| 7373117 | Power control in telecommunications networks A radio frequency transmitter is power controlled using a controlling system including an integrating controller, together with an inner and an outer control loop. A tracking signal supplied by the inner loop to the integrating controller of the outer loop is used t... | 05/13/2008 |
| 7369813 | Fast calibration of electronic components The number of measurements needed to calibrate an electrical device is reduced. Apparatus and methods minimize output of one or more unwanted signals by determining a calibration setting, in a minimal number of measurements, from determined distances to a best setti... | 05/06/2008 |
| 7356360 | Radio communication system The present invention provides a radio communication system in which not only a communication unit operating in a slave mode but also a communication unit operating in a master mode can be changed into a power saving mode. Among a plurality of communication u... | 04/08/2008 |
| 7353005 | Wireless communication unit and linearised transmitter circuit therefor A wireless communication unit (300) comprises a linearised transmitter (325) having a forward path, a power amplifier (324) and a feedback loop, operably coupled to the power amplifier (324) and the forward path. The feedback loop compris... | 04/01/2008 |
| 7349457 | Broadband frequency agile signal characterization A signal analyzer to characterize the RF signal transmitted by a frequency hopping radio transmitter. The transmitted signal is analyzed while hopping across a broad frequency band without knowledge of the hop frequencies, timing or signal bandwidth. A wide range of... | 03/25/2008 |
| 7340219 | Method and system for multisite RF transceiver testing According to one embodiment of the invention, a system for testing electronic devices includes a first RF source operable to output a first signal, a second RF source operable to output a second signal, a combiner coupled to the first and second RF sources and opera... | 03/04/2008 |
| 7340248 | Calibration apparatus In a calibration apparatus, which calibrates the phases of main signals input to each of the antenna elements of an array antenna, a calibration signal generation portion generates calibration signals, which are combined with main signals. An RF switch alternately i... | 03/04/2008 |
| 7317921 | Responding to changes in measurement of system load in spread spectrum communication systems The present invention provides a method and an apparatus for responding to changes in measurement of a system load in a spread spectrum communication system. Using a load control algorithm, for example, the spread spectrum communication system may handle sudden chan... | 01/08/2008 |
| 7298396 | Apparatus and method for monitoring transmission systems using embedded test signals A monitoring system for an RF transmission system, such as a multi-channel television broadcasting antenna feed system, gathers data about the physical and electrical condition of the RF transmission system in real time. The system can detect and localize deteriorat... | 11/20/2007 |
| 7295817 | Wireless data communication unit A wireless data communication unit (700) shares a data communication resource with a plurality of other data communication units. The wireless data communication unit (700) receives channel status information from a wireless serving communication unit ... | 11/13/2007 |
| 7280805 | LO leakage and sideband image calibration system and method A system or method for calibrating an RF transmitter includes inputting a test tone to the RF transmitter. LO leakage calibration is performed on an output of the RF transmitter with the test tone inputted thereto, in order to determine a minimum LO leakage. Thereaf... | 10/09/2007 |
| 7269404 | Radio-frequency receiving apparatus The subject invention provides a radio-frequency receiving apparatus including a built-in test signal source for producing a radio-frequency test signal. This structure achieves cost reduction, as well as an increase of the yield, since an expensive test signal sour... | 09/11/2007 |
| 7248843 | Antenna selection system and method A system and method for wireless communication. The system can include a transmitter that transmits a data signal having a time period without data transmission. The system can also include a receiver including a first antenna, a second antenna, a switch that activa... | 07/24/2007 |
| 7239849 | Adaptive communication methods and apparatus Possible deficiencies of a communication link are detected and automatically counteracted, at least to some degree. The deficiencies addressed can include phase shift and attenuation compensation. The counter-action can include adjustment of pre-emphasis given a sig... | 07/03/2007 |
| 7224170 | Fault monitoring in a distributed antenna system A method and system for detecting whether an antenna is property connected to a distributed antenna network. The current drawn by the antenna is measured and compared against an expected current draw or reference level. The measured level of current drawn by the ant... | 05/29/2007 |
| 7215951 | Test system for mobile communication terminal in which state of progress of connection-transition test can be visually recognized A test procedure control unit outputs control information including time setting information along a procedure for carrying out a transition test of a connection state of a mobile communication terminal (UE) of a cellular system. A transmitting/receiving unit transm... | 05/08/2007 |
| 7212815 | Quality evaluation method The invention relates to a method for evaluating the quality of a signal transmission path (2) presenting non-linear distortions. According to said method a specified test signal is sent from a transmitter (1) to a receiver (3). First the level ... | 05/01/2007 |
| 7206554 | Transmit diversity with formed beams in a wireless communications system using a common pilot channel A method and apparatus are provided that allows beamforming to be used on a user-specific signal together with a sector-wide pilot signal in a communication system, such as a CDMA system. In one embodiment, the invention includes transmitting a pilot signal with a w... | 04/17/2007 |
| 7190934 | Reflected power suppression circuit An amplifier 3 amplifies a transmission signal, and outputs the amplified signal to an antenna. A directional coupler 6 causes a portion of power passing through a first path connecting the amplifier 3 and the antenna to branch to a second path.... | 03/13/2007 |
| 7184721 | Transmit power control in a wireless communication device A method and apparatus permit a wireless communication device to be calibrated during manufacturing and subsequently re-calibrated while in use to correct for the effects of temperature changes on transmit power. ... | 02/27/2007 |
| 7139536 | Method and apparatus for I/Q imbalance calibration of a transmitter system A method for I/Q imbalance calibration of an OFDM system comprising the steps of initializing parameters Ap, Bp and γp, estimating a loop delay factor L, generating a discrete-time test signal x[n], deriving a signal xcom... | 11/21/2006 |
| 7123000 | Adjacent channel leakage power ratio measuring apparatus, channel power measuring apparatus method, program, and recording medium with recording the program The frequency of an adjacent channel signal is reduced by a down converter (12), wherein the signal (adjacent channel signal) in a predetermined band centered around the adjacent channel frequency passes through a band-pass filter (22). At this time, a... | 10/17/2006 |
| 7123876 | Easy set-up, vehicle mounted, in-motion tracking, satellite antenna A low profile, vehicle mounted, in-motion tracking, satellite antenna includes a pair of antenna assemblies mounted in parallel on a rotatable platform. Each antenna assembly includes two subreflectors with a plastic matching element. The outputs of the two antenna ... | 10/17/2006 |
| 7120402 | Method and apparatus for a high performance and high dynamic range baseband power control system A method and system controls transmit power by combining the advantages of digital attenuation and analog baseband step attenuators by calibration to overcome the limitations of analog step attenuators. The calibration technique uses highly accurate digital attenuat... | 10/10/2006 |
| 7102581 | Multiband waveguide reflector antenna feed A multiband waveguide reflector antenna feed comprises waveguide feeds in a concentric architecture. A waveguide feed is located in the center and coaxial waveguide feeds are disposed around the center feed. The waveguide feeds may be all-metallic with the center fe... | 09/05/2006 |
| 7095988 | Apparatus for linear transmitter with improved loop gain stabilization A device for linear transmitter (150) with improved loop gain stabilization. The linear transmitter (150) includes a main amplifier loop (178) and an auxiliary loop (176). The device includes an adjustable device (159), connected w... | 08/22/2006 |
| 7082299 | Testing loops for channel codecs A method for determining the performance of decoding in a telecommunication system having a decoder and a testing apparatus for supplying test data to the decoder includes generating test data having signalling data in a signalling frame format, mapping the test dat... | 07/25/2006 |
| 7079818 | Programmable mutlistage amplifier and radio applications thereof A programmable multi-stage amplifier includes a 1st programmable amplifier, a 2nd programmable amplifier, and a control module. The 1st and 2nd programmable amplifiers are coupled in series to amplify an input signal. Each... | 07/18/2006 |
| 7076213 | Apparatus and method for testing voltage standing wave ratio in a W-CDMA mobile communication system An apparatus and method for testing a voltage standing wave ratio (VSWR) in a wideband code division multiple access (W-CDMA) mobile communication system. Upon detecting a VSWR test request, a controller determines an oscillation frequency information and a power le... | 07/11/2006 |
| 7068982 | Determination of transmitter distortion The present invention provides a method for determining nonlinear distortion of a transmitter. A test symbol sequence is transmitted from the transmitter under test as an analog output signal. The analog output signal is sampled to produce a first sequence which rep... | 06/27/2006 |
