Abstract: A single-die multi-band switch includes a plurality of transmitter ports and a plurality of receiver ports, any one of which is selected to be connected to an antenna port. At least some of these switching topologies use a branched or cascaded switching system in order to reduce signal insertion loss. It is preferred that the individual switching elements be field effect transistors. The switching topologies employed include series-connected groups of transistors and interdigitated FETs.

Abstract: The present invention is directed toward a carrying device enabling hands-free transporting of a personal data assistant, cellular telephone, pager, MP3 Player, media player, hand held game, hand held GPS device or any other personal accessory or hand held device that may be attached to the body of a user. The device enables a detachment of the handheld device from a housing while maintaining a secured link of the hand held device to the user's body with and automatic facilitated comfortable adjustment of a secure link of the hand held device, thereby providing hand-free carrying and an elimination of risk of loss from accidental misplacement.

Abstract: A dual band WLAN (Wireless Local Area Network) communications technique is provided where a frequency synthesizer unit generates an LO (Local Oscillator) signal at a frequency between both frequency bands and two downconversion units and/or two upconversion units are provided. One of the units performs conversion between the LO signal and an IF (Intermediate Frequency) signal while the other conversion takes place between the IF signal and a zero-IF or low-IF signal. Signal processing is performed on the zero-IF or low-IF signal.

Abstract: A method of protecting an apparatus from radio frequency interference, comprises a policing terminal (PT) detecting the presence of an interfering radio terminal (16) in the protected environment and actively rendering ineffective or terminating transmissions by the interfering radio terminal. Various options can be followed by the policing terminal (PT) including (a) attempting to become the master station of a network of which the interfering terminal is a member and instructing the members to close down or (b) failing to become the master station and transmitting interference signals for at least a selected portion, for example preamble and sync, of the duration of a data packet transmitted by the interfering station.

Abstract: User information such as address books, calendars, images, ring tones, and the like may be exchanged between a mobile device such as, for example, a mobile phone and a personal computer, using an enhanced or extended version of an AT command set. Client code in the mobile device and application software on the personal computer permit a user to preserve and transfer copies of personal information via a short wired or wireless communication link, permitting the user to make use of such personal information when migrating to a new mobile device, thus avoiding manual re-entry of information, loss of stored images, and re-purchase of previously purchased and downloaded materials.

Abstract: In a wireless telecommunication system for transmitting a plurality of streams from a base transmission station comprising a plurality of antennas to a mobile station comprising a plurality of antennas, the base transmission station respectively transmits, by way of a plurality of the antennas, each stream obtained by dividing data to be transmitted. The mobile station respectively receives each stream by utilizing the plurality of antennas. A measurement unit respectively measures a reception quality or received power from each antenna relating to a stream. A change over unit carries out a handover for each stream according to a measurement result by the measurement unit.

Abstract: When power to be transmitted varies, a control section instructs an AGC control section to control a gain of an IQ modulation processing section 6 in accordance with the power. A switch selects a power source voltage, corresponding to the power to be transmitted, from power source voltages V1 to V3 of a wireless module, in accordance with an instruction of the control section, so as to supply thus selected power source voltage to a power amplifier. Thus, it is possible to realize a wireless communication circuit which occupies a less area and consumes smaller amounts of power without narrowing a communication range.

Abstract: A method determines a duration of a frame in a time-hopping, impulse radio system. Channel state information of a channel between two transceivers is estimated periodically. A signal to noise and interference ratio is also estimated periodically. The frame duration of the frame is then determined according to the channel state information and the signal to noise and interference ratio.

Abstract: Bluetooth range extending apparatus is disclosed for extending the range of Bluetooth communication between a master and an associated slave device. The apparatus (2) comprises a first communication module (3) for receiving incoming Bluetooth signals carrying data and extracting the carried data, and a second communication module (3) for re-encoding the extracted data and transmitting corresponding outgoing Bluetooth signals.

Abstract: A mechanism that enables a gateway to dynamically determine which of two transmission signal polarizations is best received by a wireless communication device having a nominally linear antenna. A first pilot and second pilot signals, having different polarizations and orthogonally encoded, are transmitted to the communication device. The communication device determines the relative or absolute signal strengths of the first and second pilot signals and transmits this information to the gateway. The gateway then selects the polarization having the strongest associated signal strength to transmit content-bearing signals to the communication device. Alternatively, the communication device may also determine the phase difference between the first and second pilot signals and transmit this information to the gateway.

Abstract: Methods and systems are provided for allowing an FDD radio to be configured to operate in Rx-high/Tx-low or Rx-low/Tx-high modes of operation. In accordance with one aspect, this is achieved in an FDD radio configuration that includes multiple switches, multiple Rx electronics, and multiple Tx electronics, allowing a diplexing filter to have selectively coupled to its high and low terminals desired Tx or Rx paths, such as to allow the radio to operate in one or another mode.

Abstract: A compact, non-phased-array, electronically reconfigurable antenna (ERA) system with at least two operational modes has a first operational objective that is polarization-sensitive null steering (PSNS) and a second operational objective that is direction-finding (DF). The system can rapidly switch between two operational states. In the first state, the system behaves like a polarization filter (PF) and operates as a controlled reception pattern antenna (CRPA), while in the second state the system behaves as an angle-of-arrival (AOA) sensor and operates as a fixed reception pattern antenna (FRPA). The system may include a spiral-mode antenna with both feed and load ports; a mode-forming network; an electronics package; and feedback control electronics. Radio frequency (RF) interference rejection and RF direction-finding may be performed as well as reduction and/or elimination of multiple jamming signals that are intentionally or unintentionally directed at a Global Positioning System (GPS).

Abstract: A wireless transceiver for a keyless entry system of an automotive vehicle includes: a circuit board having a circuit part disposed thereon; and a resin mold for molding the circuit board. The resin mold molds both of the circuit board and the circuit part, and the resin mold has a card shape. The resin mold has no connection portion of a casing so that the transceiver has high water resistance and high impact resistance.

Abstract: A wireless microphone (1) comprises a radio transmitter for transmitting radio signals carrying audio signals to a hearing device. The wireless microphone (1) further comprises at least one coupling element (11) for detachably fixing one of various interchangeable functional modules (2) to the wireless microphone (1). The coupling element (11) is designed to fix the interchangeable functional module (2) to the wireless microphone (1) by mating with a coupling element (21) of the interchangeable functional module (2). The coupling elements (11, 21) comprise electrical contacts (12, 22) for electrically connecting the interchangeable functional module (2) to the wireless microphone (1) when the interchangeable functional module (2) is fixed to the wireless microphone (1) by means of said coupling elements (11, 21). The coupling element (11) constitutes a bidirectional electrical interface between the wireless microphone (1) and the interchangeable functional module (2).

Abstract: An external primary spectrum user detector (ESUD) is used to take over the role of integral radar detectors, and relieve user devices of the constraints associated with Primary Spectrum User detection. The ESUD can establish a relationship with the user devices by means of a cryptographic signature. The ESUD installation includes assigning it a frequency band to scan for primary spectrum user signals and the type of signals to be detected. Once activated, the ESUD will scan its assigned frequencies and emit to types of messages, “All Clear” and “Primary Spectrum User detected.” User devices on the network listen for the ESUD messages. In the absence of messages from the ESUD, the user devices activate their internal primary spectrum user detectors until ESUD messages are received.

Abstract: A dustproof and pluggable transceiver includes a transceiver body, a first cover and a first rebounding member. The transceiver body on which the first cover is pivoted has a first opening, and the first rebounding member has a first end coupled with the transceiver body and a second end coupled with the first cover for providing a rebounding force to return the first cover to shelter the first opening so that dust-proofing is achieved. Through a driving member which is coupled with a direction-changing mechanism and pivoted on the first cover, and a pushing block coupled with the direction-changing mechanism, removal of the transceiver is controlled by the first cover.

Abstract: Systems, devices and methods for providing user access to broadcast content in combination with user access to short-range communication content, such as RFID tag content or the like. A broadcast medium, such as Radio Data Broadcast, that provides for broadcast frequency transmission in unison with other content being carried on alternative frequencies is used to transmit digital broadcast signals that include both broadcast content and short-range communication content. A digital broadcast receiver that is equipped to receive the digital signals will additionally include a short-range communication transponder, such as an RFID tag or the like. The transponder, i.e., tag, will include dynamic updateable memory, such that as digital signals are received with new short-range communication content the information associated with the tag will be updated. The tag allows a reader device to capture and, in many instances, store the tag information for later use.

Abstract: An interface enables an RF signal, a DC power signal, and a data signal to be conveyed between two devices over a single RF cable. In an exemplary application of this invention, a steerable antenna system is coupled to a wireless adapter for use in a wireless network. The steerable antenna includes a plurality of panels that can be selectively activated in response to the data signal, which also determines a direction in which an RF signal is transmitted or received by a selected panel of the antenna. Low pass filters in each device isolate the DC power supply and the load from the other two signals. High pass filters isolate the radio in the wireless adapter and the antenna array from the DC and data signals. The data signal is preferably encoded into a Manchester format that passes through a bandpass filter provided in each device.

Abstract: A push to talk (PTT) user interface for a wireless communications device utilizes a single all contacts database. The database is updated and utilized by the user in either a “PTT contacts” list screen or in an “all contacts” list screen. These screens are used for direct PTT calls, group PTT calls, alert calls, and standard cellular voice calls. Push to talk contacts are defined by the user and are stored on the wireless device. A direct PTT call allows a user to place a PTT call to another party or to a group with more than one party. The user can create a group “ad hoc” PTT call by selecting multiple contacts from the PTT contacts list screen. The PTT contact screen also is utilized to send an “alert” message to an individual with a PTT contact number. The alert message is either a brief text message or simply an “Alert” without text. During a PTT call, the user can view a variety of screens to add another party to the active PTT call and to save or edit participant information.

Abstract: An information communication system includes a first telephone operated by a first user, first proximity communication means operated when a first device comes into its vicinity so as to connect the both, a second telephone operated by a second user, and second proximity communication means operated when a second device comes into its vicinity so as to connect the both. The first telephone reads an IP address of the first device via the first proximity communication means, transmits it to the second telephone via a telephone network, and notifies it to the second device via the second proximity communication means. By link operation between a telephone and an electronic device in its vicinity, it is possible to share information and exchange information with a conversation partner via the telephone.