Abstract: A communication apparatus (100), when synchronization of a received signal is established, performs transmit power control using a transmit power value obtained by closed-loop transmit power control by a transmit power control circuit (201), and when the synchronization of the received signal is out, controls a current transmit power value to gradually return over a predetermined period to a transmit power value determined at a timing closest to the current timing from among past reliable transmit power values determined when the synchronization was established.

Abstract: A communication system for a mobile platform satellite service (MPSS) system includes a receiver subsystem (RS) and a transmitter subsystem (TS). A satellite transponder is in communication with the RS and the TS of the mobile platform. A satellite service ground station includes a transmitter subsystem (TS) and a receiver subsystem (RS). A communication link is established between the MPSS system and the ground station, via the satellite transponder. The communications link includes fixed satellite service (FSS) data superimposed on MPSS data in the same frequency band to thereby maximize both satellite transponder utilization and interference budget usage.

Abstract: A carrier detecting circuit which generates a carrier detection level by integral action based on a reception signal and detects using the carrier detection level whether a carrier exists is disclosed and includes an integration capacitor that is charged and discharged using a difference current between a current charged from a charging circuit and a current discharged to a discharging circuit, where the charging circuit and the discharging circuit are provided in an integrator which performs the integral action.

Abstract: There is provided a terminal which has wireless communication unit to perform wireless communication and which operates using power supplied from an external power supply or power of a battery. The terminal includes a detection unit configured to detect whether power is supplied from the external power supply, and a control unit configured to cause the terminal to start standby operation of waiting for a signal though the wireless communication unit when the detection unit detects that power is supplied from the external power supply.

Abstract: An ultrasonic transmission/reception apparatus which can image both a minute tissue around a bone part in an object and a minute tissue inside the bone, at a high resolution. The apparatus includes a system control unit which controls the synthesizers so that a first ultrasonic wave may be transmitted from one of the transmission elements while its frequency is being swept, and that a second ultrasonic wave may be transmitted from the other transmission element while its frequency is being swept with a predetermined difference frequency held relative to the frequency of the first ultrasonic wave, a signal processing unit which subjects the detection signal of the ultrasonic echo to predetermined signal processing, a signal processing unit which subjects the detection signal of the vibro-acoustic sound to predetermined signal processing, and a display-image arithmetic unit which generates B-mode image data based on the detection signals subjected to the signal processing.

Abstract: A method of performing receive antenna selection is presented. The method executes a determination operation for a set of receive antennas, determines a maximum result of the determination operation for two of the antennas, eliminates one of the two antennas from the set of antennas, and repeats the determination and elimination process until only a predetermined number of antennas remain in the set. The signals from these remaining antennas are then processed. The present invention reduces receiver complexity and cost.

Abstract: A location context-aware mobile system determines the location of a mobile device and updates a user interface based on the location of the device. By using the location of the mobile device to reduce the amount of information required to be entered by a user in a business process application, the system increases the feasibility of providing business process applications on mobile devices such as mobile telephones.

Abstract: A Transmit Diversity Redundancy controller dynamically mediates implementation of diversity and antenna hopping by detecting and remediating faults on antenna branches while minimizing the capital investment required. The controller monitors the equipment along the antenna branches. If a fault occurs, the controller determines the appropriate fault remediation measures to implement based on default settings, or relays an indicator to an external processor (e.g., a BTS or BSC CPU) and awaits instructions. If traffic on the BTS is high, the external processor instructs the TDR controller to combine the signals carried by the downed branch with the signals carried by the active branches, and the combined carrier signals are transmitted over the active branches. Otherwise, the external processor instructs the controller to allow signals carried by the downed antenna branch to be dropped, and notifies the BSC to suspend assignment of calls to the dropped carriers until the branch is restored.

Abstract: Mid-level combining methods and systems that combine benefits of high level and low level combining methods for generating HD (High Definition) radio signal outputs. The High level IBOC combining technique combines the RF outputs of an analog transmitter with an IBOC transmitter operating in a combined digital/analog mode, and can include a properly phased, identical, analog component of the signal feeding the analog transmitter. The low level combining technique includes splitting and phase adjustment for the purpose of feeding the analog signal simultaneously to an analog transmitter and an IBOC digital transmitter operating in a combined digital/analog mode. The mid-level combining method and system uses attributes of the high and low level methods and systems. Another mid-level combining method and system is for high transmitter power output (TPO).

Abstract: A radio communication device capable of specifying an arbitrary antenna gain even when an antenna having such an arbitrary antenna gain is connected is configured as follows. The radio communication device includes: a first connector for connecting a first antenna having any given antenna gain; a second antenna having a known antenna gain; a reception circuit receiving radio waves; and a control circuit that specifies a relative antenna gain of the first antenna with respect to the second antenna using a first intensity of radio waves received by the reception circuit using the first antenna connected to the first connector and a second intensity of radio waves received by the reception circuit using the second antenna, and controls the reception circuit based on a third intensity of radio waves corrected from the first intensity of radio waves based on the relative antenna gain.

Abstract: A method for channel response estimation for an OFDM communication system based on a certain normal training symbols plus one virtual training symbol begins with receiving at least one preamble symbol of a transmitted data frame. A first channel state information is estimated from the at least one preamble symbol. At least one signalling symbol is then received and equalized and a rate factor and a length factor are extracted from the at least one signalling symbol. A virtual training symbol is formed from the rate factor and the length factor. A second channel state information is estimated from the at least one preamble symbol and the virtual training symbol. The data symbols are equalized by performing channel correction on data symbols with the second channel estimation and pilot sub-carriers in each of the plurality of data symbols.

Abstract: A frequency agile sequential amplifier circuit that includes first and second RF amplifiers coupled by a SAW delay line, a double balanced mixer coupling the first RF amplifier to the SAW delay line, the output of the first RF amplifier providing a signal as a first input to the double balanced mixer and a variable pulse generator coupled to both said first and second RF amplifiers to cause them to sequentially and alternately conduct, and a divide/2 circuit coupling said variable pulse generator to said double balanced mixer as a second input at ½ the rate of said RF amplifiers to cause the sequential amplifier circuit to achieve frequency agility and to substantially maintain its sensitivity.

Abstract: Disclosed is a method for controlling power level of received signal in an ultra wide band transmission system which uses multi frequency bands, and includes a pre-gain controller (PGC) and a voltage gain amplifier (VGA). The method for controlling a power level of a received signal includes the steps of: a) at the PGCs, detecting which multi frequency band is used in a transmitter of the transmission system; b) at the PGCs, obtaining the voltage gain owing to the discrepancy in the power levels of the received signals; and c) at the PGCs, compensating for the power loss based on the voltage gain.

Abstract: An apparatus and method for notifying a user if a mobile terminal is located in an area where its power consumption is high is provided. The voltage level of a battery provided to the mobile terminal is detected. If the detected battery voltage level is reduced by at least a predetermined reference value or more for a predetermined period of time, the mobile terminal determines that the mobile terminal is located in an area where power consumption is high, and then informs the user thereof.

Abstract: The present invention provides a power supply arrangement with a DC-to-DC converter (10) for providing at least one supply voltage to a load (20, 30, 40) from an energy source (11). The converter comprises means for inputting (4) a battery voltage from the energy source to output a voltage in a predetermined battery voltage range and a transfer circuit (8) connected to said means for inputting, to convert the battery voltage to at least one supply voltage in such a way that the supply voltage will be opposite in polarity to the battery voltage and the absolute value of the supply voltage will be the same or close to the absolute value of the battery voltage. The arrangement also comprises means for controlling (2), connected to the means for inputting, to control the supply voltage independent from the battery voltage using a single converting mode for the supply voltage range.

Abstract: An antenna system with two antennas provides the possibility to operate at least two different radio communication systems with one radio communication system operating on one single antenna of the antenna system and another radio communication system operating on both antennas of the antenna system wherein the antenna system serves as a diversity antenna system. This kind of antenna system is designed to be employed particularly in small devices with restricted measurements. Especially, an implementation of an antenna system for dual use of GSM/E-GSM/DCS operation and WLAN operation is presented.

Abstract: In order to improve the logging in of battery-operated mobile parts (MT) in base stations (BS) with a battery charging device (ALE) in telecommunications systems for wireless telecommunication so that a log-in standby state between the mobile part (MT) which is logging in and the base station (BS) can be automatically produced without the user of the telecommunications system having to execute existing described procedures, said log-in standby for a battery operated mobile part (MT) in a base station (BS) with a battery charger in a telecommunications network for wireless telecommunication is produced by means of charging contacts (LK1-M, LK2-M, LK1-B, LK2-B) of the mobile part (MT) and base station (BS), whereupon the log-in procedure is carried out via the aerial interface of the telecommunications system.

Abstract: Herein disclosed is a broadcast wave receiving apparatus, comprising: first and second tuning circuits each having a resonance frequency; first controlling means for controlling one of the first and second tuning circuits to ensure that the resonance frequency of one of the first and second tuning circuits is tuned to a specific frequency before allowing one of the first and second tuning circuits to detect a broadcast wave at the specific frequency; judging means for judging whether or not to receive the broadcast wave detected by one of the first and second tuning circuits on the basis of predetermined threshold information on the broadcast waves; and second controlling means for controlling the other of the first and second tuning circuits to ensure that the resonance frequency of the other of the first and second tuning circuits is tuned to the specific frequency before allowing the other of the first and second tuning circuits to produce a broadcast signal indicative of the broadcast wave detected by one

Abstract: A dynamically reconfigurable universal transmitter system is disclosed herein. The electronic device includes multiple transmitter resources for generating transmission signals, an output bus, and an antenna summer coupled to the output bus. The output bus is selectively coupled to the plurality of transmitter resources and it selectively receives transmission signals from the plurality of transmission resources. The antenna summer stores transmission signals received on the output bus.

Abstract: A display window of a mobile phone, which prevents a deposited layer from being exposed and being oxidized/corroded, thereby improving not only the quality of the display window but also the reliability on the mobile phone provided with the display window. The display window has a deposited layer and a printed layer, which are formed in sequence on a transparent sheet, and a protective layer coated on outer edges of the deposited layer and printed layers, thereby preventing the deposited layer from being exposed.