Abstract: This invention is a portable electronic device (100) including a display (212), an input device (210), a lighting circuit (204), a light sensor (206) and a control circuit (208). The lighting circuit (204) includes a light source (214) to illuminate the display (212) and the input device (210). The light sensor (206) determines the ambient lighting conditions about the display (212) and/or the input device (210) and generates an ambient lighting signal based on the ambient lighting conditions. The control circuit (208) is coupled to the lighting circuit (204) and the light sensor (206) and has a delayed operation mode in which a first activation of the input device (210) illuminates the display (212) without performing any other operation of the device (100) and a second activation of the input device performs an operation of the device other than illuminating the display.

Abstract: A high frequency circuit board comprising: a choke coil circuit element of a high frequency switching circuit; a dielectric laminated structure body comprising a plurality of dielectric layers which comprise a first dielectric layer and a second dielectric layer; a land formed on the first dielectric layer; and a circuit pattern formed on the second dielectric layer, wherein the choke coil circuit element is mounted on the land as a chip inductor, the first dielectric layer is located at the end of the body, the second dielectric layer is located nearest to the first board in at least one of the dielectric layers on which a circuit pattern is formed, and the land is positioned out of a region formed by projecting the circuit pattern formed on the second dielectric layer in the direction of laminating of the plurality of dielectric layers.

Abstract: In a single-to-differential conversion circuit for converting a single signal into a differential signal formed of first and second signal components: a source-grounded (or emitter-grounded) first transistor receives the single signal at the drain (or collector); the gate (or base) and drain (or collector) of the first transistor are connected; the gate (or base) of a source-grounded (or emitter-grounded) second transistor is connected to the gate (or base) of the first transistor; the drain (or collector) of a gate-grounded (or base-grounded) third transistor outputs the first signal component; the source (or emitter) of the third transistor is connected to the drain (or collector) of the first transistor; the drain (or collector) of a gate-grounded (or base-grounded) fourth transistor outputs the second signal component; and the source (or emitter) of the fourth transistor is connected to the drain (or collector) of the second transistor.

Abstract: A CMOS implemented passive mixer circuit for improving linearity performance in wireless communication systems is described, including dual pairs of NMOS FETs and dual pairs of PMOS FETs. Each NMOS FET is connected in parallel with a corresponding PMOS FET. A local oscillator signal is provided to the gate of one FET while a 180-degree phase shifted local oscillator signal is provided to the gate of its complementary FET. Because the complementary FETs are driven by local oscillator signals that are 180 degrees out of phase, the NMOS FET is turned on for at least a portion of the positive cycle of the local oscillator signal and the PMOS FET is turned on for at least a portion of the negative cycle of the 180-degree phase shifted local oscillator signal. Distortion in the mixed output signal is thereby reduced.

Abstract: The invention relates to a method for supplying reference data that is to be used in a mobile station of a radio communications network for a frequency update of the frequency used by the mobile station, which reference data is based on bursts received by the mobile station from a base station of said radio communications system. In order to allow for an improved supply of reference data to an automatic frequency correction algorithm, it is proposed that the method comprises determining the signal-to-noise-ratio of all bursts received unless they were discarded by some selection process; and providing at least some of the bursts for which a signal-to-noise-ratio greater than a predetermined value was determined as basis for the reference data to be used for the frequency update. The invention equally relates to a mobile station, a module and a radio communications system comprising the corresponding means.

Abstract: A portable terminal of a cellular communication system is provided with apparatus for initiating a handover procedure to handover a connection established with one radio termination of a fixed system to another radio termination of the fixed system. The apparatus continually monitors system communication channels for transmissions by the radio terminations received at the portable terminal and identifies the nearest radio termination to be the one from which signals are received with the highest radio signal strength. If a connection is initially established by the mobile terminal with a first radio termination, but the mobile terminal subsequently moves away from that radio termination, the apparatus initiates a handover attempt of the connection to the radio termination from which transmissions are now received with the highest radio signal strength. Normally signals received with the highest signal strength will originate from the closest fixed radio termination.

Abstract: An adaptive radio receiver utilizes control functions derived from received signals in an interference-limited environment to decide whether to implement conventional single-user demodulation or joint demodulation. The decision to implement joint or conventional demodulation is based upon the values of estimates derived for Doppler spread, carrier-to-interference plus noise, dispersiveness and the likelihood of the presence of a dominant interferer.

Abstract: A demodulator (10) converts television signals to video baseband signals and audio baseband signals including stereo signals representing a right channel signal value, a left channel signal value and a pilot signal having an amplitude. A DSP (60) recursively finds a coefficient value for scaling that keeps the pilot signal amplitude within a range of values, there by improving baseband signal quality, such as stereo separation of stereo signals within the baseband signals.

Abstract: A loopback module includes a plurality of signal paths and is designed to mix an incoming phone signal with a signal from a signal generator to produce a loopback signal at the receive frequency of the phone. The loopback signal is applied to the phone's antenna. The phone then evaluates the loopback signal to determine the appropriate offset for the transmitter chain at that frequency and power level. This process is iterated until the desired number of frequencies and power levels are tested for proper calibration. The offsets are stored in memory for later use by the phone.

Abstract: A power amplifier system and method for locating carrier frequencies across a frequency band, identifying the modulation format of each carrier, and locating and suppressing undesired intermodulation distortion (IMD) products generated by the power amplifier. The system includes an amplifier for amplifying RF carrier signals in a main signal path, a variable phase shifter and variable attenuator on a feed forward path, and a tunable receiver that digitizes a portion of the frequency band to baseband. The tunable receiver includes a tunable voltage controlled oscillator which provides an oscillating frequency to a mixer and is phase-locked to a highly stable reference oscillator. The mixer downconverts a desired RF based on the oscillating frequency to IF. A filter passes only a selected portion of the IF signals, and the filter has a passband sufficient to discern both narrowband and wideband carriers and their associated IMD products.

Abstract: A plurality of detectors each output a detection signal corresponding to an output power of a corresponding one of a plurality of transmitting units. The detection signal passes through a corresponding one of a plurality of rectifiers each corresponding to the associated detector and is inputted to an input terminal of a smoothing device to allow the detection signal to be smoothed.

Abstract: A communication system (network), such as communication system is a millimeter wave (MMW) communication system, comprise a serial chain of nodes, comprising a middle node (#1) a first adjacent node (#2) on a one side of the middle node and a second adjacent node (#3) on an opposite side of the middle node, each of the middle, first adjacent and second adjacent nodes comprising a transmitter and a receiver, a first antenna at the middle node (#1) for transmitting and receiving over a first link with the second adjacent node (#3), a second antenna at the middle node (#1) for transmitting and receiving over a second link with the first adjacent node (#2) and means for performing interference cancellation in one or both of the transmitter and receiver of the middle node. Various embodiments of multidimensional equalizer are disclosed for performing interference cancellation.

Abstract: A radio system having a hub transceiver and a plurality of customer premise transceivers at different distances from the hub transceiver. Each of the customer premise transceivers includes an antenna for transmitting an upstream radio signal to the hub transceiver and receiving a downstream radio signal from the hub transceiver. A selected exchangeable attenuator pad is mounted on the customer premise antenna in the path of the radiated signals for attenuating the upstream and downstream radio signals. The attenuator pad is selected in order to compensate for the different transmission path losses in order to provide a fixed predetermined signal strength in the downstream radio signals to each of the customer premise transceivers and a fixed predetermined signal strength to the hub transceiver from each of the customer premise transceivers.

Abstract: A method and system for making profile information of a plurality of users of wireless terminals in a network accessible to the network. A current operational mode of the wireless terminal is determined. The current operational mode is identified by an operational mode name. The wireless terminal identification is used to identify the wireless terminal and/or a user of the wireless terminal. Profile information of the wireless terminal is sent to the network where the profile information includes the operational mode name and the wireless terminal and/or user identification. The profile information is sent by the wireless terminal and the sent profile information is accessible from the network.

Abstract: A cellular telephone having a global positioning system (GPS) receiver using a blended combination of GPS signals from GPS satellites and GPS pseudolites for determining a location. The cellular transceiver receives wireless downlink cellphone signals having acquisition aiding information including GPS-based time; ephemeris orbital parameters for GPS satellites; and pseudorandom (PRN) codes, locations, and signal characteristics used by GPS pseudolites in the local vicinity. The GPS receiver in the cellular telephone uses the acquisition aiding information for speeding the time to the first location fix.

Abstract: Methods and systems for providing for calling party name and/or other information corresponding to a wireless unit to be stored in association with the mobile identity number (MIN) and/or mobile directory number (MDN) of the wireless unit in a location register such as the home location register (HLR) in a network element of a wireless network. The network element is configured to accept and support the TR-1188, wireless intelligent network (WIN), or the like messaging processes. When a calling party uses a wireless unit to make a call to a wireline unit of a subscriber having calling name delivery service, the call is routed in a conventional manner to the service switching point (SSP) serving the calling line of the wireline unit.

Abstract: An automated transmit combiner monitoring system (100) for an RF radio transmitter system includes a transmitter (101) for providing a primary source of radio frequency (RF) energy and an isolator network (105,107) for isolating the output of the transmitter (101) from secondary sources of RF energy. A transmitter combiner junction (109) is used for enabling the transmitter (101) to provide RF energy to a single antenna (111) while a dummy load (113) is used for loading any unwanted RF energy from the transmitter (101) that is received from the isolator network (103,105). An RF detector (115) is then used for measuring RF energy from the dummy load and an alarm reporting device (119) then monitors the system to provide an alert based on RF energy measured outside a predetermined threshold.

Abstract: The instant invention provides a digital audio processing system that includes a mainframe chassis, a central processor card, a plurality of analog input cards, and a plurality of analog output cards for accepting a plurality of audio inputs and producing a plurality of mixed audio outputs.

Abstract: A method and system for sending information to a pager regarding information pertaining to a previously occurring telephone call. After receiving a call offered to a called party, a signal is transmitted from a switch to a service control point, which then obtains transmitted information relating to the call. A signal is transmitted from a service control point to a switch to instruct the switch to process the call. Another signal including the information relating to the call is transmitted preferably from the service control point to a service node and then to a communications service provider. The communications service provider is preferably a paging service provider which transmits a page including the information relating to the call to a pager associated with the called party. The information relating to the call then may be displayed on the pager.

Abstract: A system and method for adjusting satellite communication signal transmit power for signals transmitted to a localized region within a satellite coverage area utilize real-time information on weather conditions (172) and/or actual path losses (174) within the localized regions to adjust the effective isotropic radiated power (EIRP) of the satellite beams (188) to minimize the total radio frequency (RF) power required for transmission. The transmission system may be realized using a variety of antenna types for transmitting spot beams and/or area coverage beams. Representative antenna implementations include multi-beam antennas having a low-level beamforming network and hybrid matrix amplifier system, phased-array with independent input amplitude control and beamsteering for each beam, and a phased-array feeding a confocal imaging system for single broadcast beam per polarization.