Abstract: A method for a near field communication circuit includes entering a low power mode and subsequently determining to exit the low power mode. The method further includes generating an open loop clock signal and providing the open loop clock signal to circuits of the near field communication circuit during a low power mode exit duration. Subsequently a reference clock signal is received from a host and used to clock the near field communication circuit.

Abstract: In an embodiment, an electronic apparatus is mounted with a card unit including first and second devices driven with different driving voltages. The electronic apparatus includes: first and second voltage generating units, first and second control units. The first voltage generating unit generates a first driving voltage for driving the first device and a second driving voltage for driving the second device using electric power from the battery. The second voltage generating unit generates the first driving voltage and second driving voltage using electric power transmitted from the external device. The first control unit controls the first selection unit such that any one of the first driving voltage generated by the first voltage generating unit and the first driving voltage generated by the second voltage generating unit is selected depending on the electric power supply capability of the battery.

Abstract: In order to re-establish a suspended RRC connection, the mobile device (101) in one example sends a connection re-establishment request message to the RAN (102) to have the suspended RRC connection re-established. The RAN node may need to attempt to retrieve the RRC connection data (either from memory or if from another network element if stored elsewhere/if the RRC connection was suspended by another RAN node) and verifies whether the RRC connection is valid. When verified, the mobile device (101) receives, in response to the message, a connection re-establishment command message from the RAN (102). In response to the message, the mobile device (101) re-establishes the RRC connection with the RAN (102), using the stored RRC connection information, and sends a connection re-establishment complete message to the RAN (102). The mobile device (101) and RAN (102) may then resume user plane data communication with each other.

Abstract: A wireless communication method and apparatus that produce only a small amount of transmission delay even when carrier sensing is performed. Intensity indication data indicating the radio wave intensity of a received wireless signal is generated. The intensity indication data is intermittently captured and retained. An average of the retained intensity indication data is calculated. If the average is less than or equal to a threshold, a wireless transmission operation is enabled. The average is calculated with a frequency according to the frequency of capturing of the intensity indication data. The average and the threshold are compared at a frequency corresponding to the frequency of calculation of the average.

Abstract: An antenna device and an antenna switch circuit are provided. The antenna device comprises a first antenna, an antenna detection circuit, a switch control circuit, and a controller. The first antenna is configured to transmit an RF signal. The antenna detection circuit comprises an inductor configured to detect a second antenna. The switch control circuit is coupled to the antenna detection circuit and configured to generate a first control signal indicative of the presence of the second antenna upon the detection thereof. The controller is coupled to the first antenna, the antenna detection circuit and the switch control circuit, and configured to receive the first control signal and connect to the second antenna when the first control signal indicates the presence of the second antenna.

Abstract: According to one aspect of this disclosure, a communication terminal is provided comprising a receiver configured to receive pilot information from a first transmitter via a pilot channel; a controller configured to control the receiver to receive, during a predetermined period, pilot information from a second transmitter; and a channel estimator, configured to provide an estimation of transmission characteristics between the communication terminal and the first transmitter for receiving data from the first transmitter over the communication connection during the predetermined period based on other information about the transmission characteristics between the communication terminal and the first transmitter than the pilot information which is sent by the first transmitter via the pilot channel during the predetermined period.

Abstract: Embodiments of the disclosure provide systems and methods for improving user equipment performance by implementing antenna selection based on measurement of performance parameters of a plurality of antennas. In some embodiments, the antenna parameter measurements comprise radiated power. In other embodiments, the antenna parameter measurements comprise reflected power. In various embodiments, the antenna parameter measurements may be based on data from sensors that are operable to detect operational characteristics of the plurality of antennas based on the proximity of a portion of a user's body to the sensors. The antenna parameter measurements are then used to select one of the antennas within the plurality of antennas for transmitting and receiving data signals by a wireless communication device.

Abstract: A collision detection method for a radio-frequency SIM card with low-frequency magnetic communication comprises: transmitting by a card reader low-frequency card seeking characteristic information; determining by a radio-frequency SIM card A whether an intensity of a low-frequency magnetic induction signal reaches a preset threshold value; if yes, receiving low-frequency card seeking characteristic information and transmitting card seeking response information through a radio-frequency channel; receiving by the card reader the card seeking response information, establishing a radio-frequency connection with the radio-frequency SIM card A, and opening a preset time window; when the preset time window closes, interrupting by the card reader a transaction process with the radio-frequency SIM card A and re-transmitting the low-frequency card seeking characteristic information; if receiving by the card reader card seeking response information transmitted by another radio-frequency SIM card B, ascertaining that a r

Abstract: The present invention discloses a transmission power control method for a communication system comprising a transmitter and a plurality of receivers. The transmitter is coupled to the plurality of receivers via a plurality of corresponding outgoing links. The transmission power control method comprising steps of each of the plurality of receivers performing channel estimation for each of the plurality of corresponding outgoing links, and replying a first suggested transmission power back-off level to the transmitter; and the transmitter determining a new transmission power back-off level after collecting a plurality of first suggested transmission power back-off levels from the plurality of receivers.

Abstract: Techniques for uplink transmit power command (ULTPC) rejection threshold optimization in WCDMA for power control algorithm 2 (PCA2) are described. Uplink transmit power control commands may be received on a five-slot interval. The uplink transmit power control commands may be decoded for each of the five slots. The decoded uplink transmit power control commands may be compared for each of the five slots to a threshold. The threshold may be optimized to minimize overall transmit power control decision error. A bit decision may be made for each of the five slots based on the comparison and an overall transmit power control command may be determined based on the bit decision for each of the five slots over the five-slot interval.

Abstract: The present invention relates to the communication field and describes a communication method and a mobile communication terminal. The communication method and the mobile communication terminal according to the present invention add new capabilities to mobile communication terminals, including cell phones, such that they can choose from a plurality of radio frequency parameter sets for communications. The present invention enables cell phones to store a plurality of radio frequency parameter sets, and necessary changes to RF parameters can be assessed according to different user demands or external application environments such that the cell phone software can switch to upload the most appropriate RF parameters. Consequently, an antenna can obtain optimal parameters such that a cell phone can obtain optimal radiation properties without the need to design a new antenna and can meet HAC requirements by operators.

Abstract: An apparatus for satisfying Specific Absorption Rate (SAR) compliance criteria comprising a processor configured to receive a first capacitance measurement from a first capacitance sensor, receive a second capacitance measurement from a second capacitance sensor, determine a relative proximity of a human body to a wireless device based on the first capacitance measurement and the second capacitance measurement, and adjust a radio frequency (RF) transceiver's output power from a first output power limit to a second output power limit based on the determined relative proximity.

Abstract: An antenna element includes a bias network circuitry for: during a receive mode, charging a transmit supply capacitor from a transmit power source while decoupling a receive supply capacitor from a receiver power source and coupling the receive supply capacitor to discharge and thereby provide bias to the receiver; and during a transmit mode, charging the receive supply capacitor from the receive power source while decoupling the transmit supply capacitor from the transmit power source and coupling the transmit supply capacitor to discharge and thereby provide bias the transmitter. The antenna element includes a phase shifter/attenuator section having an amplifier and a phase shifter and wherein bias voltage is provided to the amplifier and phase shifter by the transmit supply capacitor during the transmit mode and the receive supply capacitor during the receive mode.

Abstract: Embodiments provide a mobile communication device comprising an adaptive filter for filtering a RF signal and a controller. The adaptive filter comprises a first terminal, a second terminal, a reference terminal for providing a reference potential, a first filter structure connected in series between the first terminal and the second terminal, a second filter structure connected in series between the first terminal and the reference terminal, and a third filter structure connected in series between the second terminal and the reference terminal, wherein at least one filter structure of the first, second and third filter structures comprises at least one switchable filter element. The controller is configured to selectively activate or deactivate the at least one switchable filter element based on the RF signal or a baseband version thereof.

Abstract: A method for a radio-frequency SIM card with low-frequency magnetic communication to trigger a transaction according to determined distance thresholds comprises: setting a Threshold 1 as a low-frequency magnetic field intensity value corresponding to a distance to trigger the transaction; setting a Threshold 2 as a low-frequency magnetic field intensity value corresponding to an effective communication distance of the low-frequency magnetic field; setting a Threshold 3 as a low-frequency magnetic field intensity value corresponding to a farthest transaction distance; examining an intensity of the low-frequency magnetic field transmitted by a card reader and determining whether the intensity is >=the Threshold 2; if yes, receiving and storing information of the low-frequency magnetic field; further determining whether a low-frequency magnetic field intensity is >=the Threshold 1; if yes, initiating a transaction process; during the transaction process, determining whether a low-frequency magnetic field i

Abstract: Using Near Field Communications (NFC) to provision a User Equipment (UE) with Subscriber Identity Module (SIM) data for accessing a wireless services provider's network. An NFC gesture initiates an NFC link between an NFC device and a UE containing NFC circuitry. The NFC link is used to transmit SIM data stored in a memory of the NFC device to the UE. The SIM data is received by the UE and stored in a memory of a SIM module in the UE. Thereafter, the SIM data is used to access the wireless network and obtain communication services therefrom.

Abstract: A dynamic bias circuit for an active RF circuit includes an RF sensor coupled to the input port of the active RF circuit to sense the amplitude of the incoming RF signal. A control circuit is coupled to the RF sensor and a bias source. The bias signal to the active circuit is dynamically adjusted by summing the amplitude of the incoming RF signal with the nominal DC signal from the bias source. As the power in the incoming RF signal increase, so to does the bias signal to the active circuit, which allows the active RF circuit to increase its linear range of operation in the presence of stronger signals. The active circuit is designed such that its gain and phase behavior is nearly constant over large bias adaptation ranges without distortion when bias adjustments are dynamically made to the active circuit.

Abstract: A method and apparatus for reducing spectrum interference between wireless networks. This is realized by arranging at least one sub-coordinating apparatus, namely, a monitoring apparatus, in respective wireless network, and by arranging a coordinating apparatus, namely, an allocation apparatus in the whole network. Wherein, the sub-coordinating apparatus monitors the spectrum utilization situation of the wireless network where it is located, reports it to the coordinating apparatus, and requests the coordinating apparatus for spectrum resource when new spectrum resource is needed. The coordinating apparatus maintains the spectrum utilization information of each wireless network, and allocates appropriate spectrum resource to the sub-coordinating apparatus which requests spectrum resource based on the maintained information.

Abstract: An antenna array system and method is provided for reducing interference from a source moving relative to the antenna array system. The antenna array system includes a receiver and a plurality of antenna array elements arranged in a planar array. Each of the plurality of antenna array elements is in electrical communication with the receiver and in a locationally fixed position relative to the receiver. The plurality of antenna array elements receives a desired signal and interference from the source moving relative to the antenna array system. The receiver is configured to detect a presence of the interference. In response to the detection of the presence of the interference, the receiver is further configured to steer a deep antenna-pattern null in a direction of the interference.

Abstract: An adapter for a communications module includes first terminals for connection with a host interface of a given platform, and second terminals for connection with the communications module. The host interface provides signals associated with the platform and power at corresponding first terminals. The communication module provides associated signals and connections for supplying voltages to the module circuits, at corresponding second terminals. A power converter connected to the first terminals is arranged to output fixed voltages one or more of which is required for the communications module. A power management stage connected to the output of the power converter is arranged to apply the voltages to the second terminals so that the voltages are properly supplied to the module circuits. A buffer stage connected to the first and the second terminals is arranged to buffer or condition shared signals among the host interface and the communications module.