Abstract: An antenna (100) includes a rectangular dielectric substrate (102); and a U-shaped conductive strip attached to a first surface of the substrate, the U-shaped conductive strip having two side members (202, 203), each about one-eighth a predetermined wavelength in length, and an end member (204) forming a substantially rectangular slot (206) extending parallel to the long edges of the substrate, the slot closed at a first end (212) by the end member, and open at a second end (208).

Abstract: Methods of registering a user terminal at a satellite communications system including a plurality of satellite spot beam transceivers, wherein each of the satellite spot beam transceivers defines a respective spot beam. The current spot beam registration information is transmitted from the user terminal to the satellite communications system. Updated spot beam registration information is determined for the user terminal at the satellite communications system based on the current spot beam registration information received from the user terminal. Updated spot beam registration information is transmitted from the satellite communications system to the user terminal. The user terminal updates the current spot beam registration information for the user terminal using the updated spot beam registration information received from the satellite communications system. Related systems and user terminals are also discussed.

Abstract: Apparatus, and an associated method, for performing cell selection in a packet radio communication system, such as a WIO (wireless intranet office) system. Indications of the quality of communications through a packet data network to which a base transceiver station is coupled is provided to a mobile terminal. When the mobile terminal is positioned at a location in which the mobile terminal can camp-on a selected one of more than one base transceiver stations, determination of which of the more than one base transceiver stations to which the mobile terminal should camp-on is made responsive, at least in part, to values of the quality of the packet data network.

Abstract: A cellular network includes a receiver configured to receive inbound information from a mobile station. A correlator is coupled to the receiver and configured to correlate the inbound information against expected information to generate a correlator signal. An interpolator is coupled to the correlator and configured to interpolate the correlator signal to generate an interpolator signal. A memory is coupled to the interpolator and configured to store the interpolator signal. A processor is coupled to the memory and configured to process the interpolator signal to determine a position of the mobile station. Additional embodiments track the position of the mobile station based on cellular hand off and mobile station position over time. The cellular network can transfer the mobile station from the microcellular network to the macrocellular network if the mobile station is moving rapidly.

Abstract: A method of restricting the call of a moving subscriber in a switched radio telephone system employing the moving subscriber profile of international standard protocol IS-41C, which consists of 8 bits with the upper 4 bits representing the values to respectively restrict a service provider, system, area and cell and the lower 4 bits to restrict the scope of the values, comprises the steps of registering the call restriction regions of a moving subscriber in a moving subscriber control register according to a given parameter of the moving subscriber profile, searching the call restriction information of the moving subscriber registered in the moving subscriber profile of the control register when receiving or sending a call, and allowing the call provided the moving subscriber agrees with the call restriction information.

Abstract: A phone call service based upon sensing a hand-held state of a cellular phone is disclosed According to the present invention, a user may receive and terminate a call by holding or not holding the phone, thereby allowing the user to receive a more convenient phone call service.

Abstract: The object of the invention is a method to determine channel information in a cellular system, in which method user information is transmitted in information frames, which are transmitted by the current cell base station, and in which method neighbor cell base station information (105, 205, 305, 405, 505, 603, 612, 615, 622, 623, 632, 633) is received in order to synchronise to the neighbor cell base station. Preferably the method can be used to speed up or to enable the determination of channel information in connection with handover from the area of one base station to another. In the method according to the invention the user information transmission/reception is preferably interrupted during the reception (205, 305, 612, 632) of user information, which can be i.a. the signal level, the base station identity code (BSIC).

Abstract: A pivotable and retractable antenna contains mechanical and electrical components for connecting to, and matching the impedance of, radio frequency circuitry within an electronic device, such as a radiotelephone. A dielectric substrate has one end movably mounted to the housing of a radiotelephone and an opposite free end. The end movably mounted to the housing is configured to move into various positions to allow the dielectric substrate to have a first extended position, a second extended position and a retracted position. In a first extended position, the dielectric substrate extends along a longitudinal direction defined by the radiotelephone housing. In a second extended position, the dielectric substrate free end is pivoted away from the radiotelephone in a direction transverse to the longitudinal direction of the housing.

Abstract: An apparatus and method produce a plurality of output signals (917-921) with fixed phase relationships therebetween. The apparatus (900) includes a first signal generator (901), a second signal generator (903), and a signal processor (907). The first signal generator produces a first input signal (911) at a first frequency. The second signal generator produces a second input signal (915) at a second frequency, wherein the second frequency is an integer multiple of the first frequency. The signal processor receives the first and second input signals and produces a plurality of output signals (917-921) having fixed phase relationships therebetween at the first frequency, wherein the fixed phase relationships are based on the integer multiple and wherein each of the output signals has a single, determinate phase relative to the phase of the first input signal.

Abstract: A communication system comprises a reference base station which collects one or more signal features of a mobile station signal. The reference base station determines a first location parameter of the mobile station signal it receives. The reference base station forwards the signal features to an auxiliary base station. Using the signal features, the auxiliary base station creates a replica of the mobile station signal as transmitted by the mobile station. The auxiliary base station correlates the replica with a same mobile station signal as received at the auxiliary base station in order to determine a second set of signal features. The auxiliary base station uses the second set of signal features to determine a second location parameter. The position of the mobile station is determined using the first and second location parameters.

Abstract: A device and a method for meeting the distortion characteristic of a predistorter in accordance with the distortion characteristic of an output amplifier in a transmitter. The device controls the non-linear distortion characteristic of a predistorter in a radio communication transmitter which includes the predistorter for beforehand generating the non-linear distortion characteristic in opposition to non-linear distortion characteristics arising in an output amplifier, and up-converter for converting an output frequency of the predistorter into a radio frequency bandpass and outputting the converted frequency to the output amplifier.

Abstract: A receive integrated circuit for a mobile telephone comprising a variable gain amplifier for amplifying a received signal with a variable gain, a low-pass filter for attenuating harmonic components of the signal amplifier by the variable gain amplifier, and a QPSK demodulator for demodulating by quadri-phase shift keying the signal having passed through the low-pass filter, wherein signal lines interconnecting the variable gain amplifier, the low-pass filter and the quadri-phase shift keying demodulator are balanced.

Abstract: A method and apparatus for dynamically separating and recovering original signal sources by processing a set of mixed received mixtures and convolution of said signals utilizing differential equations and a computer. The system of the invention enables the blind separation and recovery of an unknown number of signals mixed together in dynamically changing interference environments with very minimal assumption on the original signals. The system of this invention has practical applications to nonmultiplexed media sharing, adaptive interferer rejection, acoustic sensors, acoustic diagnostics, medical diagnostics and instrumentation, speech, voice, language recognition and processing, wired and wireless modulated communication signal receivers, and cellular communications.

Abstract: An RF power amplifier with variable bias current is disclosed. The RF amplifier includes a peak detector that detects the peak level of the amplifier input signal. The peak detector generates an output signal in response to the peak level of the amplifier input signal. A bias voltage level setting circuit coupled to the peak detector receives the peak detector output signal and generates a bias voltage in response to the peak detector output signal. An amplifier circuit coupled to the bias voltage level setting circuit receives the bias voltage and the amplifier input signal, and generates an output signal in response to the bias voltage and the amplifier input signal. The disclosed RF amplifier allows amplification of RF signals with high linearity and high efficiency at varying power levels, and extends the maximum power capability of the amplifier.

Abstract: Cell selection during loss of service from a selected network includes maintaining a measurement link with a channel of at least one cell of the selected network while also initiating a broader search on channels of cells of other networks or channels of the selected network not included in maintaining the measurement link. Maintaining the measurement link allows service to be re-established more efficiently if the mobile station is again immediately in a coverage area of the selected network after loss of service occurs. In an embodiment, when a cell reselection process detects a loss of service from a selected network, the mobile station maintains the measurement link by continuing to perform measurement on and synchronizing to at least one channel of the selected network to determine if service can be eventually re-established with a suitable cell of the selected network, even though service has been lost and no cell has been, or may be, reselected from the immediate measurement results.

Abstract: A Dynamic Frequency Association (“DFA”) techniques comprising fixed channel allocation (“FCA”) and distributed channel borrowing techniques using a segregation scheme is described. The DFA technique can be used autonomously to dynamically determine the best channels for a cell cluster. Additionally, a method of minimizing search delays at channel assignment by employing a channel usage history is disclosed. In one aspect, as in FCA, each cell is assigned its nominal channels, if any, from the available frequency spectrum, with a fixed radio assigned to each of these frequencies, respectively. Additionally, in accordance with the teachings of the present invention, each cell is equipped with one or more radios designated as “DFA radios”. In operation, idle DFA radios scan channels that may be borrowed in order to build a probability matrix. This enables the cell to determine which channels to use for traffic prior to actual channel request by a mobile.

Abstract: In order that roaming cordless terminals in a telecommunications system have access possibilities in accordance to their subscription, the telecommunications system has a call control protocol in which calls can be set up according to various scenarios, depending upon subscription. When an automatic branch exchange to which the cordless terminal is locked via a cordless access subsystem is coupled to another automatic branch exchange via an intervening network and the cordless terminal's home profile is in the other automatic branch exchange, a remote scenario can be carried out for allowing the cordless terminal to have access to all the features of its home profile. So, cordless terminals having different subscriptions can be dealt with in different ways.

Abstract: A method for selecting base transceiver stations to obtain radio signal timing data that is used to make a location determination of a mobile station in a wireless network. The mobile station's serving base transceiver station is selected. Base transceiver stations on the mobile station's handover candidate list that are connected to the same base station controller as the serving base station and not cosited with a previously selected base transceiver station are selected next. If a sufficient number of base transceiver stations has not been selected, base transceiver stations on a positioning neighbor list that are connected to the same base station controller as the serving base station and not cosited with a previously selected base station are selected.

Abstract: A mobile wireless terminal comprises an RF receiving means for receiving a transmission radio wave received from a base station on a designated channel, a waveform equalizer for equalizing waveform distortion of a signal received by said RF receiving means, a unique word detector for detecting a unique word from a reception signal sequence whose waveform distortion has been equalized by said waveform equalizer, a channel switching controlling means for switching the current reception channel of said RF receiving means to another reception channel corresponding to a channel switch request, a carrier detector for detecting whether or not a transmission radio wave has been received by said RF receiving means and supplying a channel switch request to said channel switching controlling means when the transmission radio wave has not been received for a predetermined time period, and a sliding controlling means for performing an on/off control for the power of said waveform equalizer at predetermined intervals for a

Abstract: The present invention relates to a handover method in a mobile communication system having a multilayer radio coverage, the system comprising at least one microcell (1, 2, 3) and at least one macrocell (M). The coverage area of the microcell (1, 2, 3) is at least mainly within the coverage area of the macrocell (M), the microcell layer forming a lower cell layer and the macrocell layer forming a higher cell layer. A cell to be examined and a target cell are located at different cell layers in the mobile communication system. In the method, relative moving speeds of mobile stations (MS) in the service area of a cell at the lower cell layer are determined and a traffic load in a cell at the higher cell layer is monitored.