Abstract: This disclosure provides systems, methods and apparatus for reducing harmonic emissions. One aspect of the disclosure provides a transmitter apparatus. The transmitter apparatus includes a driver circuit characterized by an efficiency and a power output level. The driver circuit further includes a filter circuit electrically connected to the driver circuit and configured to modify the impedance of the transmit circuit to maintain the efficiency of the driver circuit at a level that is within 20% of a maximum efficiency of the driver circuit when the impedance is within the complex impedance range. The filter circuit is further configured to maintain a substantially constant power output level irrespective of the reactive variations within the complex impedance range. The filter circuit is further configured to maintain a substantially linear relationship between the power output level and the resistive variations within the impedance range.

Abstract: A hybrid combining method in a receiver is provided, and the method includes that wideband combining, e.g. using a maximum ratio combining (MRC) or an interference rejection combing (IRC) process, to combine signals distributed over a first plurality of subcarrier frequencies from antennas in the same polarization direction is performed, resulting in a combined signal for each polarization direction that is distributed over a smaller number of subcarrier frequencies, then a two-port narrowband IRC is done of these wideband combined signals for the two polarization directions, resulting in a diversity combined signal.

Abstract: A filter includes a base and a sidewall extending from the base. The base and the sidewall cooperatively define a cavity. The filter further includes a signal input unit, and a signal output unit having a signal output port. The signal output port is located on the sidewall and extends outside of the cavity. The signal output port is connected to a conductive post received within the cavity. The conductive post collects radio signals and outputs the collected radio signals via the signal output port. The signal output unit further includes a signal detection module. The signal detection module includes a coupling plate, a coupling signal output terminal, and a probe. The coupling plate is electrically connected to the probe. The probe is located adjacent to the conductive post to receive radio signals surrounding the conductive post and output the received radio signals via the coupling output terminal.

Abstract: A sub-harmonic mixer comprising a mixer circuit with input ports for RF and LO signals, and an output port for the product of the signals at the input ports, and an LO switching stage with input ports for an LO signal and the LO signal phase shifted 180 degrees. The LO switching stage comprises a third input port to which the output port of the mixer circuit is connected and a first output port for the product of the signal at its third and first input ports, and a second output port for the product of the signal at the third and second input ports with the same amplitude as the first output signal 180 degrees phase shifted. In the sub-harmonic mixer the mixer circuit comprises a transconductance mixer.

Abstract: In a satellite-based augmentation system a data stream is generated that includes user messages having different message types. A plurality of predetermined unique sequences of message types are formed and each formed sequence is allocated to one of a plurality of data sources that are used for generating user messages in the satellite-based augmentation system. A data source is selected for generating a data stream that includes user messages. The selected data source generates the data stream including user messages by using the predetermined unique sequence of message types that is allocated to the selected data source.

Abstract: The disclosure discloses a method for querying group's dispatching area information, which comprises: a user sending a request for querying group's dispatching area information to a base station through a user terminal; and the base station querying the group's dispatching area information according to request for querying the group's dispatching area information, and returning a response to the group's dispatching area information query to the user terminal. The disclosure also discloses a query system for the querying group's dispatching area information correspondingly. The present invention can improve the validity, the dispatching reliability and accuracy of the group call.

Abstract: A method and system optimally selecting antenna elements based on the current availability of antenna elements and the current usage of other antenna elements within a two or three dimensional array. The present system and method pertain to an approach to allow the maximal usage of each antenna element while simultaneously reducing the coupling between antenna elements to improve the signal strength in each antenna element by ensuring that antenna elements in the same incident path are not tuned to the same frequency or physically or electrically near elements tuned to identical or adjacent frequencies.

Abstract: In a first mode of dedicated control channel (DCCH) operation, a wireless terminal is allocated more segments than in a second mode. The wireless terminal uses different information bit to modulation symbol mapping in the different modes. On a per DCCH segment basis, the same number of modulation symbols are communicated in either mode but more information bits are conveyed in the second mode. Information bits for a DCCH segment are partitioned into two subsets. The two subsets are used to generate another set, each of the two subsets and the another set are input to the same mapping function to generate three equal size sets of modulation symbols which are transmitted via the DCCH segment. Uplink tone hopping is used such that one of the equal size sets of modulation symbols for the DCCH segment uses the same tone but a different set uses a different tone.

Abstract: A communication node receiving and/or transmitting radio communications according to a first and a second communication protocol simultaneously. It has a first, second, respectively digital processing stage performing operations specific to the first, second protocol, respectively, operating in parallel.

Abstract: A wireless communication system includes a first base station and a second base station that respectively communicate with a mobile station by using a wireless resource. The first base station includes a resource control unit that controls allocation of the wireless resource to the second base station. The second base station includes a communication unit that communicates with the mobile station by using the wireless resource allocated from the first base station.

Abstract: A more simple and robust time synchronization of network subscribers compared to solutions known in the state of the art is provided by a device for time synchronization of network subscribers of a network based on satellites, having at least one satellite antenna connected to a receiving unit receiving a satellite signal containing time information. An electronic system that obtains the time from the satellite signal is connected to a time server with a network connection for the synchronization of the network subscribers using a network protocol. The complexity of the device is reduced and the common coaxial infrastructure between the receiving unit and the time server is removed for the satellite signal and replaced by a robust infrastructure.

Abstract: A wireless communications system supports wireless connections between base station sector attachment points and wireless terminals. Individual wireless connections correspond to one of a downlink-macrodiversity mode of operation and a downlink non-macrodiversity mode of operation. A wireless terminal has, for each of its current connections, a base station assigned dedicated control channel for communicating uplink control information reports. The uplink control information reports include downlink signal-to-noise ratio reports based on measured received pilot channel signals. If a connection corresponds to a macrodiversity mode of operation, a reporting format for the SNR report is used which reports (i) an SNR value and (ii) an indication as to whether or not the connection is considered a preferred connection by the wireless terminal. If a connection corresponds to a non-macrodiversity mode of operation, a reporting format for the SNR report is used which reports an SNR value.

Abstract: A Channel State Information (CSI) transmission/reception method and an apparatus for transmitting/receiving CSI efficiently in a Coordinated Multi-Point (CoMP) communication system are provided. The CSI transmission method of a terminal for receiving Joint Transmission (JT) from a first Transmission Point (TP) and a second TP includes receiving a first CSI Reference Signal (CSI-RS) corresponding to the first TP, receiving a second CSI-RS corresponding to the second TP, generating an aggregated CSI corresponding to the first and second CSI-RSs, and transmitting the aggregated CSI, wherein generating an aggregated CSI comprising creating the aggregated CSI with a transmission timing of the aggregated CSI. The CSI transmission/reception method and apparatus is capable of transmission CSI efficiently in the CoMP system.

Abstract: Concepts described herein may provide available RCO information that may be used when moving from one RCO to another RCO. Range rings for the available RCOs may be calculated and adjusted based on current flight conditions. The range rings may be prioritized to provide a prioritized list of available RCOs.

Abstract: A base station apparatus includes a first generating unit that generates first broadcast information for use in processing by a mobile communication apparatus that connects to the base station apparatus and in processing by another mobile communication apparatus that connects to a radio relay apparatus, and a first transmitting unit that transmits the first broadcast information. The radio relay apparatus includes a second generating unit that generates second broadcast information for use in processing by the other mobile communication apparatus, and a second transmitting unit that transmits the second broadcast information. The other mobile communication apparatus includes a receiving unit that receives the first broadcast information and the second broadcast information, and a control unit that controls radio communication performed via the radio relay apparatus, using the received first and second broadcast information.

Abstract: A wireless communication system for communicating via a wireless communication network, may include: a setting device configured to create a first information needed for joining a wireless device into the wireless communication network and set the first information in the wireless device to be joined into the wireless communication network, the setting device being configured to create setting information that correlates the first information with a second information containing at least one of information indicating a method of setting the first information and information indicating an operator who performed an operation of setting the first information; and a management device configured to select the wireless device, which is to be joined into the wireless communication network, by using the setting information that has been created by the setting device.

Abstract: A method of providing frequency dependent signal attenuation. An RF input signal is split into a first signal portion and a second signal portion. The first signal portion is discrete time filtered and bandstop filtered to provide a filtered signal portion. The second signal portion is applied to a component and a component output signal portion is received from the component. The component output signal portion is combined with the filtered signal portion to provide an RF output signal having frequency dependent attenuation.

Abstract: According to an embodiment, a semiconductor circuit includes a substrate, a tunnel oxide film, a charge storage film, a blocking layer, and plural nodes. The substrate is made of a semiconductor in which two diffusion layers each serving as either a source or a drain are formed. The tunnel oxide film is formed on a region of the substrate between the diffusion layers. The charge storage film is formed on the tunnel oxide layer and stores charge. The blocking layer is formed between the charge storage film and a gate electrode and has layers of a first oxide film, a nitride film and a second oxide film to have a thickness of 5 nm or larger but 15 nm or smaller. The nodes allow external application of voltages so that the source and the drain are reversed and allow detection a gate voltage, a drain current and a substrate current.

Abstract: A front end module has two signal paths for operation in two different frequency ranges which can be operated both with one antenna in the multiplex operating mode and with two antennas in a second operating mode. The respective operating mode is actuated via corresponding contact being made with the module substrate, and therefore by the user.

Abstract: A method includes receiving a signal via multiple receive antennas. A noise covariance matrix, which indicates noise correlations between pairs of the receive antennas, is estimated. A stability criterion defined over the noise covariance matrix is evaluated, and the noise covariance matrix is modified when the stability criterion is violated. The received signal is processed using the modified noise covariance matrix.