Patent application number | Description | Published |
20090023465 | ESTIMATION OF RECEIVED SIGNAL STRENGTH - A method for estimating a size of reverse link resources provided by a base-station transceiver system (BTS), including performing respective first, second, and third measurements of first, second, and third signal strengths received at the BTS. The method also includes comparing the first measurement with the second measurement so as to determine an initial minimum signal strength, and adding at a predetermined time an aging value to the initial minimum signal strength so as to form an updated minimum signal strength. The method further includes forming a comparison between the updated minimum signal strength and the third measurement, determining from the comparison a minimum of the updated minimum signal strength and the third measurement to be a minimum received signal strength, and determining the size of the reverse link resources provided by the BTS in response to the minimum received signal strength. | 01-22-2009 |
20100008336 | METHOD AND APPARATUS FOR SYNCHRONIZATION OF RF MODULE ACTIVITIES - An apparatus and method for synchronizing RF activities comprising receiving a notification relating to transmission activities; determining at least one of a plurality of RF modules to relay the notification; and relaying the notification to at least one of the plurality of RF modules. | 01-14-2010 |
20100105340 | INTERFACE FOR WIRELESS COMMUNICATION DEVICES - Apparatuses for providing wireless communication in a device are presented for use with a plurality of antennas including a receive antenna and a transmit antenna. The apparatuses may include a power amplifier arrangement in a transmit path coupled to the transmit antenna. The power amplifier arrangement may include, for example, at least two amplifiers that are arranged either in series with a filter coupled there between or at least two amplifiers that are arranged separately between a switch and a frequency domain multiplexer. | 04-29-2010 |
20110223907 | WIRED CELLULAR TELEPHONE SYSTEM - Telephone apparatus, including a cable television (CATV) network interface, which is adapted to be connected to a CATV network so as to receive downstream cellular telephone communication signals transmitted at a downstream intermediate frequency (IF) via the CATV network from a base-station transceiver system (BTS) operative in a cellular telephone network. The apparatus includes a telephone interface, which is adapted to connect to a cellular telephone operative in the cellular telephone network via a physical connection. | 09-15-2011 |
Patent application number | Description | Published |
20100026547 | METHOD AND APPARATUS FOR PROVIDING JAMMER DETECTION IN A RECEIVER - A method and apparatus for detecting a jammer comprising sampling an input signal; downconverting and sampling the input signal to generate a sampled downconverted (SD) input signal; comparing the sampled input signal to a wideband threshold TH | 02-04-2010 |
20100026549 | JAMMER DETECTION WITH MITIGATION OF DETECTION THRESHOLD HYSTERESIS PINCH-OFF EFFECT - Jammer detection is operable in both continuous and burst modes, managing a jammer attack in both cases. Whether in continuous or burst mode, jammer presence is detected according to a burst jammer environment. Results of jammer presence detection are stored to create a history of the jammer presence, and the history is used to manage the jammer attack. Jammer detector thresholds are implemented with hysteresis, and a hysteresis pinch-off characteristic is mitigated. | 02-04-2010 |
20110021168 | METHOD AND APPARATUS FOR RECEIVER WITH DUAL MODE AUTOMATIC GAIN CONTROL (AGC) - A method and apparatus for toggling between a first mode and a second mode of a receiver based on an input signal level comprising comparing a gain state of the receiver to at least one gain state thresholds; determining the presence of a jammer; and switching a current mode of the receiver to a new mode based on the presence of the jammer and the comparison of the gain state. In one aspect, the apparatus comprises two LNAs operating in different modes; a jammer detector to provide a jammer interrupt bit to indicate the presence of a jammer; and an automatic gain control (AGC) circuit coupled to the jammer detector for receiving the jammer interrupt bit, wherein the AGC circuit selects between the two LNAs based on the jammer interrupt bit and a gain state comparison. | 01-27-2011 |
20110090988 | APPARATUS AND METHODS FOR QAM MODULATION USING DUAL POLAR MODULATION - Apparatus and methods for QAM modulation are disclosed using dual polar modulation. QAM modulation of a signal is accomplished by translating a QAM signal into two phasors having the same or constant amplitude and then phase shifting one of the phasor by 180 degrees for a differential load. The phasors are then polar modulated such that, when differentially combined in the load through summation or superposition, a QAM modulated symbol results. The use of constant amplitude phasors when power amplified for transmission of QAM modulated signals allows amplifiers to be operated in a saturation mode with greater efficiency than conventional amplifiers used in QAM modulation, which operate in a less efficient linear mode to effect amplitude modulation. Additionally, differential combining of the phasors affords relaxation of the turns of a transformer used in amplifying the phasors. | 04-21-2011 |
20120243447 | DUAL ANTENNA DISTRIBUTED FRONT-END RADIO - Certain aspects of the present disclosure provide a dual antenna distributed radio frequency front end (RFFE). RFFE topologies described herein may provide lower insertion loss (IL), reduced emission mask, decreased power consumption, and/or lower noise figure (NF) compared to conventional RFFE topologies. One example apparatus for wireless communications generally includes first and second power amplifiers (PAs) for amplifying signals for transmission, a transmit antenna for transmitting the amplified signals, a receive antenna for receiving other signals to be processed in a receive path, and a first transmit filter configured to filter the amplified signals from the first PA before amplification by the second PA. For certain aspects, a divided inter-stage filter providing overlapping frequency bands may be utilized. For certain aspects, the RFFE may support frequency-division duplexing (FDD)/TDD (time-division duplexing) coexistence, including support for FDD/TDD MIMO (multiple input multiple output). | 09-27-2012 |
20130244591 | LIMITED Q FACTOR TUNABLE FRONT END USING TUNABLE CIRCUITS AND MICROELECTROMECHANICAL SYSTEM (MEMS) - A wireless device is described. The wireless device includes a tunable front end module. The tunable front end module includes a Tx microelectromechanical system bandpass filter. The tunable front end module also includes a first Rx microelectromechanical system bandpass filter. The wireless device also includes a power amplifier. The wireless device further includes a low noise amplifier. | 09-19-2013 |
20130258948 | WIRED CELLULAR TELEPHONE SYSTEM - Disclosed is a telephone system using a telephone network interface configured to couple a cellular telephone to a cable network. The interface coupled in this way enables transmission and reception of communication signals to and from a cellular telephone network over the cable network allowing communication of the cellular phone to a cellular network connected to the cable network, for instance. The telephone network interface is further configured to enable the interface to communicatively couple with the cellular telephone using packet-based communication, such as session interface protocol (SIP) packet based communication. | 10-03-2013 |
20140003300 | ANTENNA INTERFACE CIRCUITS FOR CARRIER AGGREGATION ON MULTIPLE ANTENNAS | 01-02-2014 |
20140065985 | TRANSCEIVER WITH SUPER-HETERODYNE AND ZERO INTERMEDIATE FREQUENCY (ZIF) TOPOLOGIES - Transceivers implemented with a combination of super-heterodyne and zero intermediate frequency (ZIF) topologies are disclosed. In an exemplary design, an apparatus includes a frequency conversion circuit and a local oscillator (LO) generator. The LO generator generates a first LO signal and a second LO signal. The frequency conversion circuit performs frequency conversion (i) between intermediate frequency (IF) and baseband, based on the first LO signal, for an IF signal and (ii) between radio frequency (RF) and baseband, based on the second LO signal, for an RF signal. The frequency conversion circuit may perform frequency downconversion (i) from IF to baseband for a super-heterodyne receiver and (ii) from RF to baseband for a ZIF receiver. Alternatively or additionally, the frequency conversion circuit may perform frequency upconversion (i) from baseband to IF for a super-heterodyne transmitter and (ii) from baseband to RF for a ZIF transmitter. | 03-06-2014 |
20140120851 | DC OFFSET FILTER FOR WIDE BAND BEAMFORMING RECEIVERS - A DC offset filter for wide band beamforming receivers is disclosed. In an exemplary embodiment, an apparatus includes a first mixer configured to down-convert an RF wideband beamformed signal to generate a first baseband wideband beamformed signal, the RF wideband beamformed signal having a beam pattern selected from a plurality of beam patterns, and a notch filter configured to remove DC offset from the first baseband wideband beamformed signal independent of the beam pattern. | 05-01-2014 |
20140133364 | ANTENNA INTERFACE CIRCUITS WITH QUADPLEXERS - Techniques for supporting data transmission and reception on multiple bands for carrier aggregation are disclosed. In an exemplary design, an apparatus (e.g., a wireless device) includes first and second antenna interface circuits coupled to first and second antennas, respectively. The first antenna interface circuit includes a first quadplexer for first and second bands. The second antenna interface circuit includes a second quadplexer for the first and second bands. The first quadplexer may be a duplicate of the second quadplexer, which may simplify implementation. Each antenna interface circuit may further include a diplexer, a duplexer, a triplexer, another quadplexer, switches, etc. The first and second quadplexers may support data transmission and reception on two bands in a first band group. Other circuits in the first and second antenna interface circuits may support data transmission and/or reception on additional bands, possibly in one or more other band groups. | 05-15-2014 |
20140242923 | SHARED FILTER FOR TRANSMIT AND RECEIVE PATHS - Shared filters used for both transmit and receive paths are disclosed. In an exemplary design, an apparatus (e.g., a wireless device, an integrated circuit, or a circuit module) may include a filter and a switch. The filter operates as a transmit (TX) filter for a first band and as a receive (RX) filter for a second band. The filter may (i) receive and filter an output radio frequency (RF) signal when operating as the TX filter and (ii) receive and filter a received RF signal when operating as the RX filter. The switch is coupled to the filter and receives and passes the output RF signal to the filter or an input RF signal from the filter. The apparatus may further include a second filter operable as a TX filter for multiple bands and/or a third filter operable as an RX filter for multiple bands. | 08-28-2014 |