Abstract: A method of compensating a direct-current offset coupled into a receiving path of a receiver, the receiving path having at least one gain factor adjustable by a gain control, which method first determines an amount of a direct-current offset present at a selected end point in the receiving path. A compensation quantity is set accordingly. In case of a forthcoming adjustment of the at least one gain factor by the gain control, the compensation quantity is then scaled with a scaling factor to prevent a direct-current step at the selected end point due to this forthcoming adjustment. The final compensation quantity is fed at a selected summing node into the receiving path. The invention is also directed to a corresponding receiver, an electronic device comprising such a receiver, a hardware component for such a receiver and to a corresponding software program product.

Abstract: The invention aims to provide a multifunction personal computer/mobile phone capable of being used both as a mobile phone and as a mobile personal computer, to improve input operability when used as a mobile phone as well as a personal computer, and to retain a compact form when it is not used. A multifunction personal computer/mobile phone is so configured that a left keyboard, a display and a right keyboard are mounted on a hinge so that they are folded and unfolded freely, wherein on the left and right keyboards, key indications for digits, characters, symbols or the like for personal computer use are arranged, and on either of the keyboards, key indications for digits, characters, symbols or the like for mobile phone use are arranged so that the hinge is at the far end from a user, wherein the display is formed rotatably with respect to the keyboard, and the left and right keyboards are spread to a position where the surfaces of the keyboards are horizontal.

Abstract: The present invention is to provide a cellular phone capable of measuring temperature including a liquid crystal display, a CPU and an IR temperature measurement means coupled to the CPU, wherein a first GPO pin and a second GPO pin of the CPU are adapted to control power supply of a power supply IC and start or stop of the IR temperature measurement means respectively, and in response to receiving a temperature measurement signal, the CPU performs a plurality of processing and conversion steps to show a corresponding temperature on the display.

Abstract: A wireless communication device includes a removable panel (100), a base cover (200) and a latching assembly (300). The removable panel has a first mounting portion (120). The base cover has a second mounting portion (240) corresponding to the first mounting portion of the removable panel. The latching assembly includes a lacking fastener (320) and a coil spring (340), wherein the latching assembly is effective to nail the removable panel into the housing through the first mounting portion and the second mounting portion. Therefore, it is simple, tight and easy for current invention using the latching assembly to fix the removable panel to the base cover, or to disassemble the removable panel away.

Abstract: Provided is an automatic gain controller for obtaining a high a signal-to-noise ratio (SNR), and for reducing power loss by controlling a gain until the gain reaches a maximum value, and a transmitting apparatus and method for use with a mobile communication terminal having the automatic gain controller. The automatic gain controller causes a variation of a gain at a radio frequency (RF) amplifier with respect to the variation of a control voltage to have a larger gradient than a variation of gain at an intermediate frequency (IF) amplifier with respect to the variation of the control voltage, and causes a total gain to have a decreasing gradient in accordance with the control voltage until the total gain reaches its maximum.

Abstract: A relatively low cost, easy to install and aesthetically pleasing cellular signal enhancer, also known as a wireless repeater, suitable for use in a home or business. The device includes a removable mounting pedestal that can be plugged into both an upper and a lower receptacle on a signal enhancer unit. This allows the signal enhancer unit to be installed with the same upright orientation when installed on an upper or a lower support surface, for example the bottom or top casing of a window frame. The mounting pedestal includes a power plug so that the mounting pedestal is removable and can be plugged into the upper or lower receptacles on the signal enhancer unit. Alternatively, the unit may include an orientation detector and an invertible display that inverts the symbols shown on the display in response to the detected orientation of the signal enhancer unit.

Abstract: Techniques for scheduling measurements for cells in multiple (e.g., GSM and W-CDMA) wireless communication systems are described. GSM neighbor cells are categorized based on a number of states. The states are prioritized in a manner to achieve good performance. The GSM neighbor cells are thus assigned different priorities depending on their states. W-CDMA neighbor cells are prioritized relative to the states for GSM cells. All W-CDMA neighbor cells can be assigned the same state, given the same priority, and considered as “one” W-CDMA cell in the scheduling. A cell in the GSM or W-CDMA system is selected based on the priorities of the neighbor cells, and the selected cell is scheduled for measurement in the next available frame. The highest-ranking GSM or W-CDMA cell for each idle frame is thus granted use of that idle frame for measurement.

Abstract: In a mobile network a packet interface (103) is monitored by a tap (160-163) in a non-intrusive manner. Captured transaction data is uploaded to a probe (155-158) linked to one or more taps. The probe acts as a slave to a server (159), activating and terminating data capture. A coordinator (601) of the probe (155) manages data capture and buffering according to the server. The server (150) filters the data according to a subscriber registry (203) and loads data until there are complete protocol descriptions. These provide real time subscriber-centered QoS metrics.

Abstract: A low-noise differential bias circuit is provided which obtains excellent noise characteristics while ensuring excellent distortion characteristics. A collector of a transistor Q11 is connected to a voltage supply point (Vcc) via a resistor R15. A base of the transistor Q11 is connected to a base of a transistor Q1 via resistors R13, R11 connected in series. A connection point between the resistors R11, R13 is connected to the collector of the transistor Q11. A collector of a transistor Q12 is connected to the voltage supply point at connection point A via a resistor R16. A base of the transistor Q12 is connected to a base of a transistor Q2 via resistors R14, R12 connected in series. A connection point between the resistors R12, R14 is connected to the collector of the transistor Q12. By this configuration, a high frequency ground is performed at the connection point A.

Abstract: A frequency synthesizer for use in a transceiver generates a relatively high reference frequency with fine frequency resolution and low in-band phase noise by using a digital processor to generate a digital reference signal at a finely-tuned reference frequency. A Digital-to-Analog Converter (DAC) converts the digital reference signal to an analog reference signal, and a low pass filter filters the analog reference signal to produce a filtered analog reference signal. The frequency synthesizer further includes a phase locked loop for up-converting the filtered analog reference signal from an IF signal to an RF signal.

Abstract: In a radio communication system having a phase control loop for phase modulation and an amplitude control loop for amplitude modulation and being capable of time divisional transmission and reception under a predetermined time management, when transmission in a first mode is switched to transmission in a second mode or when transmission in the second mode is switched to transmission in the first mode, the output level of the power amplifier is lowered once to a predetermined level higher than the level when transmission related circuits are activated, and thereafter the output level of the power amplifier is again ramped after the settings have been changed but without starting of a transmission oscillator, establishing of the phase control loop and the amplitude control loop.

Abstract: The radio-frequency signal frequency conversion device generates intermediate complex signals (IF) for a correlation stage of a low power RF receiver. In order to do this, the device includes a first selective pass-band filter for filtering radio-frequency signals picked up by an antenna. A frequency synthesizer generates first and second high frequency signals, wherein the frequency of the first signals is higher than the frequency of the second signals. This synthesizer receives reference signals from an oscillator unit. A first mixer unit mixes the radio-frequency signals with the first signals in order to generate frequency-converted signals. A second pass-band filter filters the signals from the first mixer unit, and provides signals to a second mixer unit to mix them with the second high frequency signals. Finally, shaping means for the signals provided by the second mixer unit generate the intermediate signals.

Abstract: A satellite digital radio broadcast receiver has an integrated circuit including a first reception series for processing a satellite wave signal from a satellite and a second reception series for processing a ground wave signal from a repeater in order to receive both the satellite wave signal and the ground wave signal having the same broadcast contents and different modulation methods. The receiver has an automatic gain control unit for amplifying a signal from a single antenna at a variable gain amplifier, and in accordance with the level of a signal outputted from the variable gain amplifier, for controlling the gain of the variable gain amplifier; and a two-way distributor for distributing an output of the automatic control unit to two distribution outputs, wherein one distribution output of the two-way distributor is supplied to the first reception series of the integrated circuit and the other distribution output is supplied to the second reception series of the integrated circuit.

Abstract: Configurable communications modules and methods of making the same are described. In one aspect, a communications module includes a data channel and a termination impedance controller. The data channel is operable to translate data signals in at least one direction between a transmission cable interface and a host device interface. The data channel has a variably configurable termination impedance at a host device node that is connectable to a host device. The termination impedance controller is operable to set the variably configurable termination impedance of the data channel to match the termination impedance to the host system.

Abstract: The invention provides a method of estimating the time offsets between signals transmitted by plural transmitters of a communications network and received by a receiver attached to a terminal. In the method a section of a representation of the signals from the plural transmitters received by the receiver at the terminal (a “terminal section”) is created as are a first section of a representation of the signal transmitted by a first of said transmitters and a second section of a representation of the signal transmitted by a second of said transmitters. Each of the first and second sections overlaps in time with the terminal section. Using the first section, the second section and a set of signal parameters, including initial estimates of the time offsets between the first section and the terminal section and between the second section and the terminal section, a model of a section of a representation of the composite signal received by the receiver from the first and second transmitters is created.

Abstract: Methods and systems for seamlessly broadcasting data to a user moving among a plurality of broadcast coverage areas. A first signal containing desired data may be received by a receiving device at a user location, wherein the first signal is broadcast from a first transmitting station associated with a first broadcast coverage. Thereafter, the receiving device (e.g., a radio or in-vehicle television) can be automatically instructed to search for and tune to a second transmitting station associated with a second broadcast coverage area broadcasting a second signal containing the desired data if the first signal fades at the user location, thereby permitting the user to seamlessly receive data as the user moves among a plurality of broadcast coverage areas.

Abstract: An apparatus and method for performing automatic frequency control of a mobile communication terminal detects a current peak position value from a downlink pilot signal and then calculates a difference value (dev) between the current peak position and a previous peak position value. A zero-run value is then calculated by counting the number of successive 0s in the difference value (dev), and an AFC voltage from controlling an oscillator is obtained based on the difference value. This difference value is then used to control a frequency of a transmitter in the terminal. Accordingly, an accurate oscillation frequency can be generated without being affected by noise existing in the communication environment and thus communication performance can be enhanced.

Abstract: A mixer arrangement includes a first mixer having at least one signal input for receiving a first signal the frequency of which is to be changed. The mixer arrangement also includes at least one frequency input for receiving an input frequency and at least one output. The first mixer is configured to mix a first signal with an input frequency to provide an output which is output by the at least one output. A second mixer has at least one frequency input for receiving an input frequency and at least one output. At least one output of the first mixer and at least one output of the second mixer are combined to cancel unwanted components from the input frequency in the outputs of the mixers.

Abstract: A portable radio terminal for realizing automatic frequency control (AFC) for automatically controlling the oscillation frequency of an oscillator includes a unit for intermittently performing AFC operation, and a unit for shortening an AFC operation stop period when the frequency shift of the oscillation frequency is large. An AFC control method is also disclosed.

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.