Abstract: A calibrated VHF/FM source for use in correcting tape recorder and receiver rrors which consolidates these functions in a lightweight rack using commercial test parts and maintains a high precision of accuracy by having the system monitor it's own output and correct the distortion and amplitude errors attributable to the nonlinear behavior of the a Voltage Variable Capacitance diode (VVC diode) of the Voltage Capactive Oscillator (VCO) of the VHF FM transmitter.

Abstract: A method for a radio frequency communication unit (110) (CU) to hand off from a losing node (120) to a gaining node (122) estimates a gaining node uplink time (210) and a gaining node uplink frequency (212), which the gaining node uplink signal comprises. During handoff, the CU (110) ceases communications with the losing node (120) and immediately begins communications with the gaining node (122) using the uplink time and uplink frequency. A CU apparatus (300) uses a processor (302) for carrying out calculations necessary for estimating the gaining node uplink time and frequency. Information necessary for the calculations, such as a downlink signal time-of-arrival and Doppler offset, are collected by a CU receiver (306). The CU receiver (306) and a CU transmitter (304) are used to support downlink signals (142) and uplink signals (140), respectively, between the CU (110) and a node (120, 122).

Abstract: A method for testing a communication link between first and second components of a system, which components communicate via a selected one of a plurality of broadcast channels, the second component being powered by a self-contained power source, the method comprising: causing the first component to scan a plurality of the broadcast channels in sequence in a receiving mode during a scanning period and to broadcast a test signal over the selected channel during the scan; and maintaining the second component in an inactive state in which energy consumption is minimized and in which the second component is unresponsive to broadcast signals during a major part of the scanning period, placing the second component in an active state in which the second component can detect the test signal during a time when the test signal is being broadcast, and causing the second component to broadcast a response signal upon detection of the test signal.

Abstract: In a radio receiver, a method and apparatus combine signals received by physically separated antennas. The amplitude of each received signal is limited. The amplitude limited signals are demodulated, and the demodulated signals are combined to form an output signal in which each demodulated signal constitutes a part in relation to a weight factor. The weight factor of the demodulated signal with a corresponding received signal having the lowest amplitude is given the value 1.

Abstract: A millimeter-wave wireless data transmission link is utilized to interconnect multiple electronic components within an enclosed electronic system. More specifically, an electronic apparatus includes a housing, a plurality of separated electronic components located within the housing, and a plurality of millimeter-wave transmit/receive integrated circuit devices, each coupled to a corresponding one of the separated electronic components. Data is transmitted between the plurality of separated electronic components via the millimeter-wave transmit/receive integrated circuit components, each of which includes one or more transmit/receive circuits preferably operating at frequencies above 35 GHz. The transmit and receiving frequencies of the transmit/receive integrated circuit devices can be dynamically set in memory to enable transmission links to be easily reconfigured.

Abstract: On a ceramic substrate, spiral-type inductors of a single layer wiring of a metal thin film are provided and respectively connected to a wiring pattern formed on another face of the substrate via through holes. A semiconductor chip is flip-chip mounted on the substrate in a face-down manner. On the face of the semiconductor chip, capacitors composed of a highly dielectric material, resistors formed by an ion implantation method or a thin-film forming method, and FETs are provided, respectively. Interconnection between the substrate and an external circuit board is achieved employing terminals formed at end faces of the substrate. The terminals have a concave shape with respect to the end face of the substrate. Thus, there is no need to use a package, and miniaturization and reduction in cost of a high-performance hybrid IC is achieved.

Abstract: Disclosed is a method enabling the improvement of the multisensor reception of a system of radiocommunications exchanging signals between at least one fixed base station providing for multisensor reception by means of a network of sensors, and the processing of the signals. This method consists, in a transparent manner perceived from the base station, in computing a weighting vector W for the formation of channels at reception. The weighting vector W is estimated by an adaptive algorithm leading to a maximization of the signal-to-noise ratio. Application: mobile radiocommunications. FIG.

Abstract: A radio communication device (103) operable in a radio communication system (100) providing a plurality of radio communication services including radiotelephone, facsimile and electronic mail services. The radio communication device (103) has a body housing element (107) and moveable housing element (109). When the moveable housing element (109) is in the closed position, the moveable housing element (109) covers a portion of a touch screen display (119). A keypad (125) is integrated into the moveable housing element (109) and operable when the moveable housing element (109) is in the closed position. When a user depresses a key of the keypad (125) a portion of the key provides pressure against the touch screen display (119). The provided pressure activates a portion of the touch screen display (119).

Abstract: Novel methodologies are provided for managing neighbor channel interference in a cellular wireless communications system as a function of a service-quality factor for a communications channel within such a system. Those methodologies, and their essential function are characterized as:Even/Odd Cell Designation--for eliminating adjacent-channel conflicts within a cell;Vertical Channel-Set Construction--for eliminating adjacent-channel conflicts between abutting sectors in sectorized cells; andMinimum Adjacency Circuit Method--for reducing the number of adjacent edges between abutting cells or sectors in a regular channel assignment.

Abstract: Even when a multi-spot beam is utilized, a demand assignment multiple access (DAMA) type satellite communication can be established between a plurality of satellite earth stations installed in one zone located opposite to another zone where a control station is installed, and between the control station and the satellite earth station installed in the same zone. The control station transmits a channel setting signal for setting a communication channel to the satellite earth stations installed in the opposite zones by using a CSC signal, and further sets a channel of a transmitting/receiving unit in such a manner that after the CSC signal derived from the satellite earth station has been received, this CSC signal is returned thereto. A repeater station has a function such that repeater station receives the CSC signal to return this CSC signal, and also receives a communication signal to return this communication signal.

Abstract: An adaptive learning system for adapting the frequency setting and volume level of a vehicle radio in response to a vehicle operator's preference of radio stations and volume levels for a particular time of day. A microprocessor is responsive to the frequency settings and volume level of the radio as set by the vehicle operator with respect to specific time intervals of the day. The microprocessor will establish a list of priority radio stations dependent on how often the vehicle operator selects the radio frequencies during each specific interval and an average volume level of the radio. The system will then automatically set the radio frequency and volume level based on the vehicle operator's priorities at vehicle start-up with respect to the current time of day.

Abstract: Each base station measures the field intensity of downlink rediowaves from other base stations, then analyzes the received rediowaves above a predetermined field intensity value and decides whether they are rediowaves used in the same mobile radio communication system. The base station creates peripheral base station information based on information about the rediowaves decided as being used in the same mobile radio communication system.

Abstract: Methods and systems for allocating control channels in a radiocommunication system are disclosed. Control channels are each linked to a dedicated traffic channels such that when the dedicated traffic channel is allocated to a particular cell, so is its respective control channel. Implementation according to the present invention is independent of the particular ACA scheme used to determine traffic channel allocation.

Abstract: A portable telephone includes a main body of the telephone, a transducer (preferably an earphone) contained in the main body so that it can be removed therefrom, a cord connecting the transducer and the main body, and a switching mechanism. The portable telephone further comprises transmitting means and a transmission/reception circuit. In one embodiment of the present invention, the switching mechanism switches between an off-hook state and an on-hook state in conjunction with the removing and containing of the transducer from and into the main body of the telephone preferably through the delivery or taking up of the cord from and into the main body of the telephone. In a second embodiment, the portable telephone further includes a hinged lid which is rotatably supported to close an opening provided in the main body.

Abstract: A digital cordless telephone (10) includes a handset (12) and a base station (14). A voice activity detector (20) in the handset (12) determines whether speech or silence is being received by a microphone (13) in the handset (12). An active enable signal is transmitted to the base station (14) when silence is being transmitted. An adaptive comfort noise generator (30) in the base station (14) then provides a comfort noise to a destination telephone instead of the silence. The output level of the comfort noise is a function of an energy level of a linear data signal received by the base station (14) before the enable signal becomes active.

Abstract: A method of assigning and sharing carriers in a cellular communications system having a plurality of cells forming a plurality of cell clusters of size N. Each cell has at least one base station capable of sending and receiving signals and each cell has a plurality of adjacent cells. A plurality of distinct carriers are allotted for use by the system and divided into N groups which are assigned among the N cells of each cell cluster so that each cell cluster has a substantially similar assignment of distinct carrier groups. Each group of distinct carriers is divided into a plurality of carrier subgroups wherein each subgroup of carriers of a cell substantially corresponds to an adjacent cell. The subgroups of carriers are respectively designated for borrowing by cells adjacent to a corresponding cell. When all of the carriers assigned to a cell are utilized, a carrier can be borrowed at limited transmitted power, from a corresponding subgroup of carriers of an adjacent cellular gateway.

Abstract: An apparatus for controlling the output power of a transmitter installed in a vehicle or used in a mobile radio communication equipment and more particularly to apparatus and method for accurately measuring and controlling over a wide range the output power of a radio frequency to be transmitted.

Abstract: An apparatus for the error free transmission of PCM/FM telemetry data. The pparatus comprises a first mixer for receiving an RF signal which has a first frequency and which is the carrier for the PCM/FM telemetry data. A variable frequency oscillator provides a local oscillator signal to the first mixer which is an offset for the RF signal. The first mixer then mixes the RF signal with the local oscillator signal resulting in the RF signal having a second frequency. This RF signal is supplied to a second mixer which mixes the RF signal with a fixed frequency signal provided by a fixed frequency oscillator. The RF signal provided by the second mixer now has a third frequency and is supplied to a bandpass filter. The frequency of the local oscillator signal is adjusted so that the offset to the RF signal provided by the first mixer is approximately one half of the intermediate frequency bandwidth of the bandpass filter.

Abstract: A mobile phone holder includes an upper casing member and a lower casing member, each having an inside surface on which a plurality of parallel-arranged guiding slots are formed. Two clamp members each comprise a flat plate member to which a strip-like section is fixed to be selectively slidably receivable within the slots of the upper and lower casing members. Each of the clamp members has resilient holding sections extending therefrom to define a space for receiving and holding therein a mobile phone. The open end of the casings allows the clamp members to be removed from the casing members and re-inserted into another guiding slot so as to change the distance between the clamp members and thus adapted to hold mobile phones of different sizes.

Abstract: A method for on-off modulation of a transmitter coil current of a high-Q resonant circuit transmitter comprising the steps of sensing a zero-crossing of the transmitter coil current and substantially instantaneously interrupting the transmitter coil current, and a high-Q resonant circuit transmitter for carrying out said method.