Abstract: The present invention is an efficient method of transferring energy wirelessly and an apparatus which efficiently transfers energy wirelessly. A high transmission frequency is modulated by a lower frequency in order to reduce the intensity of the resulting electromagnetic interference. The present invention creates a high magnetic flux density by employing a large number of small induction coils which generates a strong electromagnetic field in a wide range of directions. The present invention is a “true wireless system” in that it overcomes the range limitations and requirement for precise alignment present in the field of art. A number of apparatuses and practical implementations for contactless energy transfer exist.

Abstract: A data relay apparatus includes a first demodulating unit, demodulating a modulation signal of a first modulation mode from a first transmission source; a second demodulating unit, demodulating a modulation signal from a second transmission source, having a modulation mode higher than the first modulation mode; a combination controlling unit, providing a mapping rule necessary for performing signal combination in accordance with the modulation mode of the modulation signal from each of the first and second transmission source, the mapping rule to map the demodulated modulation signal from the first transmission source together with the demodulated modulation signal from the second transmission source to a constellation of symbols of the second modulation mode; a data combining unit, performing data combination on the demodulated modulation signal from the first transmission source and the demodulated modulation signal from the second transmission source according to the mapping rule.

Abstract: A satellite communications interoperability module and method for frequency down-conversion. The module insertable in-line with an intra-facility link communicating a multiplexed signal between the outdoor unit (ODU) and the indoor unit (IDU). Electrical circuitry of the module transforming and forwarding the multiplexed signal over the intra-facility link, the multiplexed signal including at least direct current, a standard tone, and L-band data signals. Switching means of the module specifies operations performed by the electrical circuitry to transform the multiplexed signal frequencies, waveforms and voltages according to predetermined parameters compatible between the ODU and the IDU. An interoperability method for compatibility with a range of different indoor units applied by the interoperability module and or incorporated into an integral ODU is application of a second frequency shift upon the L-band signal output from the ODU primary down-conversion circuit.

Abstract: A paging apparatus and method in a mobile communication system providing an MBMS (Multimedia Broadcast Multicast Service). In the mobile communication system, to page a UE for a first service through a primary carrier during a second service in progress through a secondary carrier, a PICH (Paging Indication Channel) transmitter in a Node B transmits paging indication information to the UE through the primary carrier by oscillating the primary carrier as a transmission frequency. A PCH (Paging Channel) transmitter transmits paging information to the UE through the primary carrier or the secondary carrier by oscillating the primary carrier or the secondary carrier as the transmission frequency under a predetermined control. A PBMSCH (Physical Broadcast Multicast Shared Channel) transmitter transmits data of the second service through the secondary carrier by oscillating the secondary carrier as the transmission frequency.

Abstract: A novel system and method for a network overlay geolocation system operating in a host wireless communication system with repeaters is disclosed. Embodiments of the novel system and method enable a wireless communication system to determine if signals being received by system receivers arrive directly from a target mobile appliance or if the signals are passing through or via a repeater. In an embodiment, the system's repeaters use a co-channel AM Golay Hadamard sequence multiplied by an uplink signal to watermark the repeated signal. The system uses the known AM Golay Hadamard sequences of the repeaters and the waveform of the received uplink signal to detect whether a repeater has operated on the signal and which repeater operated on the uplink signal. Embodiments of the novel system and method provide system management data and can be used to provide more accurate geolocation of mobiles served by repeater stations.

Abstract: Disclosed is a data transmission system that transmits data using a relay. During a first time slot, a base station may transmit base station data to the relay, and a mobile station may transmit mobile station data to the relay. During a second time slot, the relay may transmit the mobile station data to the base station, and transmit the base station data to the mobile station.

Abstract: A craft-mounted repeater system processes signal properties (e.g., signal strength) between terrestrial (ground-based) wireless networks and mobile users that are aboard crafts (e.g., airplanes and/or ships) equipped to allow the user's mobile communications device to communicate at departure and at arrival of the craft. An onboard craft-mounted non-translating in-band only repeater system is a provided that increases the terrestrial mobile network signal levels inside the aircraft or ship to allow passengers to communicate with a terrestrial cellular communications system.

Abstract: The present invention relates to a system and method for extending the coverage area and communication capacity of a spread-spectrum based wireless network through the use of intelligent repeaters. The system comprises a wireless communication network augmented with low cost channel selective repeaters that is capable of repeating only desired signals, thereby suppressing undesirable interference and increasing network capacity. The repeaters can be integrated into an existing wireless network with minimal impact to the existing network layer topology or control structure.

Abstract: A paging apparatus and method in a mobile communication system providing an MBMS (Multimedia Broadcast Multicast Service). In the mobile communication system, to page a UE for a first service through a primary carrier during a second service in progress through a secondary carrier, a PICH (Paging Indication Channel) transmitter in a Node B transmits paging indication information to the UE through the primary carrier by oscillating the primary carrier as a transmission frequency. A PCH (Paging Channel) transmitter transmits paging information to the UE through the primary carrier or the secondary carrier by oscillating the primary carrier or the secondary carrier as the transmission frequency under a predetermined control. A PBMSCH (Physical Broadcast Multicast Shared Channel) transmitter transmits data of the second service through the secondary carrier by oscillating the secondary carrier as the transmission frequency.

Abstract: In one embodiment, a method is provided. The method of this embodiment may include, in response, at least in part, to receipt at a first node of a request issued from a second node to change from one mode of operation to another mode of operation, selecting an amplitude of a signal to be propagated between the first node and the second node during the another mode of operation. The amplitude of the signal may be different from another amplitude of the signal during the one mode of operation. The method of this embodiment also may include, in response, at least in part, to the receipt of the request, selecting a frequency of a clock signal to be supplied in the first node during the another mode of operation. The frequency may be different from another frequency of the clock signal during the one mode of operation.

Abstract: A base station apparatus is provided for adaptively controlling a maximal accommodation channel number per unit area (for example, the coverage area of a cell or sector) in accordance with a traffic quantity without relying upon detachment of a mobile base station and installation of a repeater. Upon inputting of a plurality of baseband signals of a user channel-multiplexed channel group, linear coupling is performed by a weight which is different per area that outputs it, thereby enabling control of the channel density. Additionally, a per-group available channel number is constantly monitored to control the weight while using threshold judgment for the available channel number as a trigger, thus achieving situation-sensitive prompt handleability.

Abstract: Aspects of a method and system for a low-complexity multi-beam repeater may include receiving one or more information signals at one or more receiver antennas, and receiving one or more local oscillator control signals via an out-of-band link. The one or more received information signals may be demodulated to one or more intermediate-frequency signals via one or more frequency carrier signals, wherein the frequency carrier signals may be controlled by the one or more received local oscillator control signals. One or more intermediate-frequency signals and/or one or more signals generated from the one or more intermediate-frequency signals may be modulated to one or more radio-frequency signals via the one or more frequency carrier signals. One or more transmit signals comprising at least one of the one or more radio-frequency signals may be transmitted via one or more transmit antennas.

Abstract: Multi-carrier broadband wireless communication can be supported by providing identification information that identifies a group of carrier frequencies that an intended recipient of a transmission has selected for use in the transmission. A modulation and coding scheme for use in transmitting on the selected group of carrier frequencies is selected based on communication quality information indicative of communication quality associated with transmitting on the selected group of carrier frequencies. Transmission on the selected group of carrier frequencies is performed according to the selected modulation and coding scheme.

Abstract: Aspects of a method and system for selective equalization enablement based on modulation type may be found in a method for processing a radio frequency (RF) signal that comprises receiving a Bluetooth signal via an RF channel, detecting a modulation type of the received Bluetooth signal, and selecting an equalization circuit for processing the received Bluetooth signal based on the detected modulation type. The method may also comprise determining a data rate based on the detected modulation type.

Abstract: A wireless communication system and method for determination of the location of a location-incapable device of a decentralized wireless communication network. Upon receipt of location determination information, relevant to the location of the location-incapable device in the network and sufficient to perform a calculation of the location of the location-incapable device, a location-capable device of the network may calculate the location of the location-incapable device and make this information available to one or more devices of the network.

Abstract: A system and method for communicating between ground stations and mobile satellites effectively eliminates the need for transferring information from one ground station to another. Communication between a ground station and a mobile satellite is accomplished via an intermediate network of geosynchronous control satellites. The mobile satellite is positioned within a three-dimensional cellular grid formed by the network of geosynchronous satellites. This system is particularly applicable to a terrestrial network communicatively coupled to the geosynchronous network via one or more ground stations. The terrestrial network of ground stations no longer needs to perform expensive, time-consuming and manual synchronization and hand-off procedures.

Abstract: A signal filtering system and method that may be used in conjunction with a repeater or an input stage of a base-station. The system may include an analog to digital converter adapted to sample a received signal and to produce a data stream corresponding to the received signal in the time domain, a filtering block having one or more digital filter elements, wherein each of said one or more filter elements is adapted to filter one or more sets of frequency bands associated with one or more communication channel, and a controller adapted to configure said one or more digital filter elements based on parameters stored on a database and/or based on parameters received via a modem.

Abstract: A repeater for re-transmitting uplink and downlink signals in a wireless network. The repeater uses antenna cross-polarization, signal cancellation and digital processing techniques to reduce or eliminate coupling of echo signals between the receive and transmit antennas of the downlink and uplink signal paths in the repeater.

Abstract: A method and apparatus for joint unicast using multi-user superposition coding in a wireless relay system are provided. A BS superposition-encodes first and second data messages directed to first and second MSs, respectively, scheduled at a current scheduling instant. The first and second data messages carry first and second information bit streams for the first and second MSs, respectively. The first MS has a relatively good direct link to the BS, and the second MS has a relatively bad direct link to the BS. The superposition-coded data is transmitted to the first MS and an RS connected between the BS and the first and second MSs. The RS receives the superposition-coded data from the BS, extracts the second information bit stream by decoding the superposition-coded data, and transmits a third data message carrying the second information bit stream to the first and second MSs.

Abstract: Systems and methods for receiving non-coherent layered modulation signals are presented. An exemplary apparatus comprises a tuner for receiving a layered signal and producing a layered in-phase signal and a layered quadrature signal therefrom, an analog-to-digital converter for digitizing the layered in-phase signal and the layered quadrature signal, a processor for decoding the layered in-phase signal and the layered quadrature signal to produce a single layer in-phase signal and a single layer quadrature signal, a digital-to-analog encoder for converting the single layer in-phase signal and the single layer quadrature signal to a single layer in-phase analog signal and a single layer quadrature analog signal and a modulator for modulating the single layer in-phase analog signal and the single layer quadrature analog signal to produce a single layer signal.

Abstract: Group communications methods and apparatus are described. In particular, methods for granting a mobile device access to a communications resource, e.g., the right to transmit data, associated with a group are described. User requests for the communications resource are suppressed by the corresponding mobile device, for periods during which the communications resource has been granted to another mobile device. A mobile device may store a suppressed user request so that a resource request signal may be transmitted after the communications resource has been released by the mobile device that was previously granted the resource. In this manner requests that cannot be granted are not transmitted, increasing communications efficiency as compared to systems where requests are not suppressed at the mobile devices. A priority scheme is used in some embodiments to determine whether or not a request should be suppressed while another device has been granted the communications resource.

Abstract: A method and system for transmitting data in a wireless network. The method includes generating a plurality of waveforms corresponding to a plurality of frequency subbands for a predetermined frequency band. The predetermined frequency band is divided into a plurality of groups of subbands, and the plurality of groups of subbands being divided into the plurality of frequency subbands. Additionally, the method includes receiving a data signal, processing information associated with the received data signal, modulating the plurality of waveforms based on at least information associated with the received data signal, and transmitting the modulated plurality of waveforms. Any two of the plurality of waveforms are substantially orthogonal to each other. Each of the plurality of waveforms corresponds to a waveform frequency spectrum associated with a spectral amplitude as a function of a frequency.

Abstract: Adaptive modulation/demodulation method in a radio communication system is provided. A modulation multi-level number in a transmission device and a demodulation multi-level number in a reception device are judged independently from each other according to a propagation condition and communication is performed by controlling the likelihood when the multi-level numbers of the transmission side and the reception side are different. The reception device can perform operation by controlling likelihood information on lower bit of the multi-level modulation even when the modulation multi-level number and the demodulation multi-level number used at the transmission side are different. Moreover, the transmission device and the reception device independently decide the modulation multi-level number and the demodulation multi-level number, thereby following an instantaneous propagation fluctuation and improving the throughput.

Abstract: Systems and methods of ultra-wideband communication are provided. In one embodiment, an ultra-wideband communication system divides a stream of data conveying symbols into a plurality of unspread substreams. A common spreading code is generated at the ultra-wideband transmitter, and each of the unspread substreams are spread using the common spreading code to form a plurality of spread substreams. The spread substreams are combined to form a composite signal that is transmitted. This Abstract is provided for the sole purpose of complying with the Abstract requirement rules that allow a reader to quickly ascertain the subject matter of the disclosure contained herein. This Abstract is submitted with the explicit understanding that it will not be used to interpret or to limit the scope or the meaning of the claims.

Abstract: Various aspects can be implemented to identify broadcast audio streams. In one aspect, a method includes receiving a plurality of broadcast streams, each from a corresponding broadcast source and generating a first broadcast audio identifier based on a first broadcast stream of the plurality of broadcast streams. The method also includes storing for a selected temporary period of time the first broadcast audio identifier. The method further includes receiving a user-initiated telephone connection; and generating a user audio identifier. Other implementations of this aspect include corresponding systems, apparatus, and computer program products.

Abstract: A wireless communication system, an apparatus, and a method for transmitting information to describe network topology of the wireless communication system in a mobile multi-hop relay standard are disclosed. The system can either be a two-hop relay station system or a multi-hop relay station system. The apparatus can use a CDMA ranging code set to transmit information and manage other apparatuses of the wireless communication system under a mobile multi-hop relay standard. The CDMA ranging code set comprises a mobile station (MS) code set and a relay station (RS) code set. The MS code set is used to transmit information from the MS to the base station (BS). Likewise, the RS code set is used to transmit information from the RS and the BS.

Abstract: This invention presents a dual-mode wireless/wired power line communications that is used to carry signals with variable transmission data rates from 31.0 Mbps to 173.6 Mbps over a power line cable. The dual-mode wireless/wired power line communications can be seamlessly used either to connect with any wired devices over cable lines directly or to connect with any wireless devices without wires. This enables multiuser to access high-speed Internet over the wall power sockets, and to provide distribution of data and multiple data streams, such as voice over IP, audio and video, HDTV, throughout the home, office, hotel room or airport waiting area, and so on. On the other hand, using the dual-mode wireless/wired power line communications modem is to utilize the availability of an existing infrastructure of wires and wall outlets, thereby eliminating the requirements of new installation of power line cables.

Abstract: Systems and methods for receiving layered modulation for digital signals are presented. An exemplary apparatus comprises a tuner for receiving a layered signal and producing a layered in-phase signal and a layered quadrature signal therefrom, an analog-to-digital converter for digitizing the layered in-phase signal and the layered quadrature signal and a processor for decoding the layered in-phase signal and the layered quadrature signal to produce one or more discrete layer signals.

Abstract: Provided is to a communication apparatus and method using a human body as a medium, in which secure/normal data signals are transmitted/received to the inside and outside of a human body respectively, through at least two different frequency channels classified according to a predetermined reference value, to thereby efficiently use a frequency based on a physical characteristic of a channel and increase a data transmission rate while maintaining security.

Abstract: Various methods and apparatus for frequency-domain estimation of carrier frequency offsets are provided in which the carrier frequency offset estimate is robust against non-white (frequency-dependent) noise. A carrier-specific weighting factor is associated with each carrier of a multi-carrier signal. Using the carrier-specific weighting factors, a carrier frequency offset estimate is computed from received signals and estimated channel transfer functions associated with each of the carriers. Because greater weights are given to carriers whose frequencies include lower noise and/or carriers transmitting a known sequence of symbols, the estimate of the carrier frequency offset is improved. The carrier frequency offset estimate may then be applied in a feedback loop to phase-compensate a subsequently received signal.

Abstract: A method and apparatus for determining an optimum modulation scheme for a retransmission in a communication system supporting HARQ. When two modulation schemes are available, at an initial transmission, information is modulated in the lower-order modulation scheme if a first MPR is less than a first threshold, and in the higher-order modulation scheme if the first MPR is greater than or equal to the first threshold. Here, an MPR is determined by an EP size, the number of available Walsh codes, and the number of slots per sub-packet that are used for a transmission. To select one of the modulation schemes for a retransmission, a second MPR is calculated using an EP size, the number of available Walsh codes, and the number of slots per sub-packet that are used for the retransmission. If the first MPR is equal to or less than a second threshold greater than the first threshold, the lower-order modulation scheme is selected.

Abstract: In a wireless communication apparatus which has the functions of both ASK modulation and QPSK modulation, which can be manufactured at a low cost, and which is small in size, an output terminal of a QPSK modulator is connected to a carrier wave input terminal of an ASK modulator via a switch. Also, an antenna is connected to an output terminal of the ASK modulator via a switch. Furthermore, a mixer is provided between the switches and. The switch connects the QPSK modulator and the ASK modulator at the time of a transmission, whereas it connects the QPSK modulator and the mixer at the time of a reception. The switch connects the ASK modulator and the antenna at the time of a transmission, whereas it connects the antenna and the mixer at the time of a reception. Thus, at the time of a transmission, an ASK-modulated wave or a QPSK-modulated wave is output using the ASK modulator and the QPSK modulator.

Abstract: The system controller 12 attains program table data from a received electric wave upon turning on the power source. Program table data are rearranged for every ensemble and stored again. The user makes an input operation to set a channel-feed selection which requires switching of a program to be attained. Then, the system controller 12 performs a processing of attaining a program listed next in the same ensemble as that of the program which has been attained just before based on the rearranged program table data. When attaining a program next to a program listed in the last, the ensemble is switched to another ensemble. Programs are attained sequentially from the program listed first in the another ensemble thus switched. Switching to a different ensemble takes place at a reduced frequency, so that the time until output of an attained program can be shortened.

Abstract: An apparatus and method for controlling a duplication structure of a Base station Transceiver Subsystem (BTS) is provided. The BTS has N number of sectors including a first sector to an Nth sector and M number of Frequency Assignments (FAs) including a first FA to an Nth FA. The apparatus and method includes N number of power dividers, each of which has M number of output ports and one redundancy output port, each of the power dividers dividing an input signal into equal-power signals each having 1/(M+1) power and outputting the power-divided signals through the M number of output ports and one redundancy output port.

Abstract: Only a first radio station is equipped with a local oscillation signal source. A signal transmitted to a second radio station includes local oscilaation signal components used to up-convert a modulated intermediate frequency band signal in addition to intermediate frequency band signal components. The second radio station that receives the signal from the first radio station extracts and regenerate the local oscillation signal used at the first radio station using a local oscillation signal regenerator. The extracted and regenerated local oscillation signal is used to down-convert modulated radio signal components to the intermediate frequency band and simultaneously up-convert to the radio frequency band the modulated intermediate frequency band signal to be transmitted to the first radio station.

Abstract: A radio frequency communication system utilizing a radiating transmission line for communicating data signals is disclosed. The data signals convey digital data to remotely located data devices, including computers, equipment control systems and digital video cameras. The data signals have a wide bandwidth of about 0.5 MHz to 32 MHz. In this way, the communication system creates a local area network by means of the radiating communication line. The communication system is intended to be used in environments where radio waves do not propagate well, such as in underground environments, and in particular mines. The communication system comprises at least one amplifier connected to the radiating transmission line for periodically amplifying the data signals by demodulating the data signals to recover the data contained therein and then modulating the recovered data into a regenerated radio frequency at a power level permitting transmission and radiation of the regenerated radio frequency data signal.

Abstract: A satellite system is provided that includes a receive antenna system to receive one of C-band and/or Ku-band signals and a transmit antenna system to transmit one of C-band and/or Ku-band signals. A payload section may be coupled between the receive antenna system and the transmit antenna system. The satellite system may provide broadband communications at C-band and/or Ku-band.

Abstract: A first transmitting device is used to transmit a first signal on a first carrier frequency to a relay device. The relay device receives the signal by demodulating the first carrier frequency. Subsequently, the relay device retransmits the signal by modulating a second and/or a third carrier frequency. The signal is then recovered at one or more receiving devices by demodulating the second and/or third carrier frequencies. Further, a second transmitting device transmits a second signal on a fourth carrier frequency and the relay device retransmits the signal by modulating a fifth and/or a sixth carrier frequency. The signal is then recovered at one or more receiving devices by demodulating the fifth and/or sixth carrier frequencies. The transmitting and/or receiving devices are preferably voice terminals, such as a wireless telephones or data terminals, such as portable computers.

Abstract: A digital broadcast system is provided which uses a satellite direct radio broadcast system having different downlink modulation options in combination with a terrestrial repeater network employing different re-broadcasting modulation options to achieve high availability reception by mobile radios (14), static radios and portable radios (14) in urban areas, suburban metropolitan areas, and rural areas, including geographically open areas and geographic areas characterized by high terrain elevations. Two-arm and three-arm receivers are provided which each comprise a combined architecture for receiving both satellite and terrestrial signals, and for maximum likelihood combining of received signals for diversity purposes. A terrestrial repeater is provided for reformatting a TDM satellite signal as a multicarrier modulated terrestrial signal. Configurations for indoor and outdoor terrestrial repeaters are also provided.

Abstract: Disclosed is a mobile communication network employing a plurality of digital optical links for providing high speed, more capacity and multimedia services which includes a base station (BS) controller for managing the overall control of the mobile network and coupled to a base transceiver system (BTS) via a first E1/T1 link; a BTS controller coupled to the BS controller via a second E1/T1 link for managing the channel capacity of multiple base transceiver system operable by the base station controller; a plurality of optical fiber links coupled to said BTS controller through optical coupling; a plurality of compact base transceiver systems (BTSs) having a plurality of optical transponders arranged in space relation with each other along each of said optical fiber links; said optical transponders for receiving an up-link signal at one frequency to be retransmitted as a down-link signal and for amplifying said up-link signal at another frequency to other compact BTS along said optical fiber link.

Abstract: The invention refers to a method and an apparatus for determining characteristics of components of a communication channel.

Abstract: Group communications methods and apparatus are described. In particular, methods for granting a mobile device access to a communications resource, e.g., the right to transmit data, associated with a group are described. User requests for the communications resource are suppressed by the corresponding mobile device, for periods during which the communications resource has been granted to another mobile device. A mobile device may store a suppressed user request so that a resource request signal may be transmitted after the communications resource has been released by the mobile device that was previously granted the resource. In this manner requests that cannot be granted are not transmitted, increasing communications efficiency as compared to systems where requests are not suppressed at the mobile devices. A priority scheme is used in some embodiments to determine whether or not a request should be suppressed while another device has been granted the communications resource.

Abstract: An improved enhancer is disclosed which uses a switch matrix to increase the isolation between two antennas. For either an reverse link or forward link communication, the enhancer has a first antenna for receiving an incoming signal, and a receiver sub-system that amplifies and converts the incoming signal from the first antenna to a first predetermined frequency band. The enhancer further has a demodulator coupled to the receiver sub-system for demodulating the converted signal, and detecting timing information thereof. Also contained in the enhancer is a transmitter sub-system operable with the receiver sub-system that converts the signal from the receiver subsystem to a second predetermined frequency band and further amplifies the signal. After the signal is thus enhanced, a second antenna is used for further transmitting the amplified signal from the transmitted sub-system.

Abstract: In order to retransmit a communication channel at a specific frequency, a receiver may receive a signal including the communication channel's specific frequency. An analog to digital converter may generate a digital signal correlated to the received signal and the digital signal may be passed through a digital filter configured to filter the digital signal and pass frequency components at or around the frequency of the communication channel's specific frequency. A digital to analog converter may generate an analog signal correlated to the filtered digital signal and a transmitter may transmit the analog signal.

Abstract: Channel fluctuation estimating section 101 estimates fluctuation amount of the channel between transmitting apparatus 100 and receiving apparatus 200, and carrier number determining section 102 determines the number of subcarriers used in transmission of signal based on channel fluctuation amount. That is to say, in the case of a remarkably rapid channel fluctuation caused by fast fading, etc., carrier number determining section 102 deduces relatively the channel fluctuation between symbols or within a burst, by decreasing the subcarriers number and increasing symbol rate per one subcarrier.

Abstract: A multi-carrier transmitting apparatus and method is described, wherein a plurality of carrier signals are combined in the digital domain and supplied to a D/A converting means (3) for converting the combined digital carrier signals into an analog signal to be transmitted. The frequency characteristic of the D/A converting means (3) is compensated by scaling means (51 to 54) for pre-scaling individual ones of said plurality of carrier signals before being combined and supplied to D/A converting means (3). The pre-scaling may be performed by multiplying digital data, representing the carrier signals, by corresponding frequency-dependent digital scaling words. Thereby, the need for signal processing intensive digital filters or non-ideal analog filters can be prevented. In case a digital power control is provided, the scaling word can be combined with a power control word.

Abstract: A device for generating a radio frequency electrical signals, delivering at least two separate signals having different frequencies, in the form of signals delivered by different primary sources and amplified with a predetermined gain. The device comprises a combining circuit (3), combining the signals delivered by the primary sources (2), a single channel power amplifier (4) and a multi-channel selection and routing unit (5) with a parallel structure. Each channel delivers at the output an amplified signal (S) at a frequency (F) characteristic of one of the primary sources (2) and comprises a filter circuit (6) adjusted to be passing for one of the different characteristic frequencies (F) of the different primary sources (2), an impedance adaptation circuit (7) and a rejection circuit (8) for frequencies other than the passing frequency of the filter circuit (6) of the channel in question.

Abstract: A dual mode device (110) comprising a communications block (120) and a satellite positioning block (130), each comprising respective Base Band (BB) blocks (123, 132) and crystals or frequency sources (122, 1312). The communications crystal (122) provides a cellular clock signal (FS1) to the satellite positioning block (130), which monitors the difference in the frequencies the crystals produce (FS1, FS2), using Vernier interpolation to gain a resolution greater than one clock cycle. The positioning crystal (1312) is used independent of the cellular crystal to demodulate satellite signals. The positioning BB (132) tracks the demodulated satellite signals compensating any errors caused by the positioning crystal signals (FS2) to the demodulation, using the information resulting from the monitoring. The communications crystal is capable to network based calibration and the positioning BB can compensate for the fluctuation thus caused in the cellular clock signal (FS1).

Abstract: An allocation section 101 in a base station apparatus of the present invention sets the transmission rate of a transmit signal for a communication terminal apparatus based on a DRC signal transmitted from that communication terminal apparatus. A power margin information detector 117 detects power margin information from a demodulated signal generated by a demodulator 115, and, using that power margin information, a power setting section 118 makes a setting so as to give the minimum transmission power value at which received signal characteristics in each communication terminal apparatus meet the desired quality. Using the set transmission power value, the base station apparatus transmits a transmit signal of the set transmission rate to a communication terminal apparatus.

Abstract: A first transmitting device is used to transmit a first signal on a first carrier frequency to a relay device. The relay device receives the signal by demodulating the first carrier frequency. Subsequently, the relay device retransmits the signal by modulating a second and/or a third carrier frequency. The signal is then recovered at one or more receiving devices by demodulating the second and/or third carrier frequencies. Further, a second transmitting device transmits a second signal on a fourth carrier frequency and the relay device retransmits the signal by modulating a fifth and/or a sixth carrier frequency. The signal is then recovered at one or more receiving devices by demodulating the fifth and/or sixth carrier frequencies. The transmitting and/or receiving devices are preferably voice terminals, such as a wireless telephones or data terminals, such as portable computers.