Abstract: There is provided a highly reliable transmission/reception integrated radio-frequency apparatus which can achieve a high communication quality in a cable modem. A reception RF signal is input to a reception system block via an input/output terminal, converted to an intermediate-frequency signal, and output from a terminal. An output terminal of a transmission processing section of a transmission system block is connected to the input/output terminal via an overvoltage protection circuit, a high-pass filter functioning as a countermeasure to overvoltage, and a low-pass filter for suppressing harmonics produced from the high-pass filter.

Abstract: A radio communication system includes a remote device radio, and a base station radio operable to communicate with the remote device radio at a first channel and at a second channel using non-simultaneous frequency diversity. The base station is operable to communicate with a device other than the remote device at the second channel while the remote device radio and the base station radio are communicating at the first channel. A radio using non-simultaneous frequency diversity includes an antenna, a radio frequency module coupled to the antenna such that the radio frequency module is operable to transmit or receive radio frequency signals at a first channel and signals at a second channel using the antenna, and a baseband module coupled to the radio frequency module. The baseband module operable to transmit or receive signals through the radio frequency module, such that signals transmitted or received by the radio employ non-simultaneous frequency diversity using the first channel and the second channel.

Abstract: An interface for connecting networks includes an interworking function provided between a wireless local area network (WLAN) and a public mobile land network (PLMN) to provide communication interactions between the PLMN and the WLAN. The interworking function includes a dual-protocol stack, which interfaces the WLAN protocols and PLMN protocols to provide seamless communications between the WLAN and the PLMN such that an increase in available service bandwidth provided for users of the PLMN is maintained.

Abstract: Power detector integrally formed within a printed transmission line to capacitively couple a portion of signal power propagating on the printed transmission line and a power detector circuit that receives coupled power output from the power detector to detect a power level of the signal power. The power detector is designed such that capacitance of the coupling capacitor is absorbed into a distributed capacitance of the transmission line to maintain continuity of a characteristic impedance of the transmission line.

Abstract: The present invention relates to a radio communication equipment comprising a first antenna 1, a first RF unit 2 for wireless communication, the first RF unit 2 being connectable to said first antenna 1, wherein a first frequency band is used by said first RF unit 2 for reception of a signal via said first antenna 1 and a second frequency band is used by said first RF unit 2 for transmission of a signal via said first antenna 1, said first and second frequency bands being used alternatively by said first RF unit 2 and a second RF unit 3 for wireless communication, the second RF unit 3 being connectable to said first antenna 1, wherein a third frequency band is used by said second RF unit 3 for reception of a signal and a fourth frequency band 3T is used by said second RF unit 3 for transmission of a signal, said third and fourth frequency bands being used simultaneously by said second RF unit 3.

Abstract: Reducing the peak-to-average power ratio of a signal comprises receiving the input signal, where the input signal is associated with at least one unacceptable frequency range. The input signal is clipped about an amplitude range to yield a clipped signal and clipped information, where the clipped information represents intermodulation products. The clipped information is filtered to yield an error signal. The error signal represents a subset of the intermodulation products, where an intermodulation product of the subset corresponds to the unacceptable frequency range. The error signal is subtracted from the input signal to yield an output signal.

Abstract: A telephone signal cancellation circuit, a digital broadcasting reception circuit and a portable digital broadcasting reception apparatus is provided. The telephone signal cancellation circuit, includes a signal coupler for separating a part of a reception signal, a telephone signal selection filter for passing a telephone signal among signals from the signal coupler, a phase shifter for performing phase inversion on the telephone signal among the signals from the telephone signal selection filter, and a combiner for combining the signal from the phase shifter and the reception signal, and canceling the telephone signal included in the reception signal.

Abstract: A dual or multi-mode wireless communication device has a first microprocessor for a first type of wireless signal, such as an IEEE 802.11 (“WiFi”) signal, and a second microprocessor for a second type of wireless signal, such as a cellular network signal. The received signal strength of the first type of wireless signal is monitored by the first microprocessor when the communication device is operating in a first wireless mode, and a notification message is sent from the first microprocessor to the second microprocessor whenever the received signal strength is determined to have changed from one level to another level. The second microprocessor then updates a received signal strength indicator (“RSSI”) icon on the screen of the wireless device to indicate the new received signal strength level.

Abstract: Methods of displaying information on a display of a cellular telephone are provided in which information from at least a first of a plurality of standby screen applications is displayed on the display of the cellular telephone while the cellular telephone is in a standby mode. A second of the plurality of applications is then automatically selected based on a set of pre-defined rules. Thereafter, the displayed information from the first of the plurality of applications is replaced with information from the second of the plurality of applications while the cellular telephone remains in the standby mode. Related cellular telephones and computer program products are also provided.

Abstract: A communication terminal includes a communication interface configured to exchange data via a communication network, a memory, a first table stored in the memory and configured to store identifiers of communication terminals which are senders of received data, a second table stored in the memory and configured to store identifiers of communication terminals designated by a user, a user interface configured to receive an input of an identifier of a communication terminal with which a communication is to be initiated, and a processor configured to determine whether the identifier of the communication terminal input via the user interface is stored in the first table, determine whether the input identifier of the communication terminal is stored in the second table, and if a result of the determination is affirmative, instruct the communication network not to notify an identifier of its own terminal to the communication terminal.

Abstract: A squelch detector that differentially detects a presence of a communication signal on a communication channel. The squelch detector being coupled to outputs of a differential offset bias amplifier to receive differential offset biased signals and generate a differential direct current signal.

Abstract: An apparatus and method for characterizing an amplifier transmitting a band limited signal using a sample of the input signal to the amplifier and a sample of the output signal from the amplifier, where the output signal is sub-sampled. The sub-sampling frequency is chosen such that images of the band limited signal do not overlap. The input signal and the output signal in a polar format are processed to determine characteristics such AM/AM and AM/PM conversion nonlinearities.

Abstract: A receiver for receiving a radio frequency signal includes an attenuator for attenuating a disturbance signal such as an image signal which causes disturbance to a received frequency of the radio frequency signal, on the basis of set information of the received frequency. The attenuator includes a trap circuit for producing a resonance frequency in accordance with the set information. The trap circuit is connected on a supply line for the radio frequency signal and suppresses the disturbance signal by the resonance frequency.

Abstract: A voice data and RF integrated circuit (IC) includes a memory module that stores a least one application as a plurality of operational instructions, the at least one application having a plurality of power modes that each correspond to one of a plurality of use characteristics. A processing module executes the plurality of operational instructions, determines a selected one of the plurality of power modes based on current use characteristics of the at least one application, and generates a power mode signal based on the selected one of the plurality of power modes. An on-chip power management circuit receives the power mode signal and generates a plurality of power supply signals based on the power mode signal.

Abstract: A single-path enhanced-algorithm digital automatic gain control (SDAGC) integrated receiver is presented. The SDAGC has a front-end RF/IF reception/processing block and associated RF/IF AGC, which outputs to a single ADC. Output from the ADC is split into two TDM and one COFDM signal pathways, each with a respective DAGC. The TDM DAGCs are controlled according to TDM post-power signals, while the COFDM, DAGC is controlled according to COFDM post- and pre-power signals. An IF Gain Decision block determines the RF/IF gain based upon the respective gains of the TDM and COFDM DAGCs. A Gain Distributor block then distributes the total gain of the system across the RF/IF AGC and the various DAGCs. To save power, the COFDM pathways may be disabled if the COFDM pre-power signal falls below a threshold value.

Abstract: A communications circuit can operate with a data channel and a control channel. A changeable portion of the circuit can be reconfigurable between a first mode associated with activity on the control channel only and a second mode associated with activity on both the data channel and the control channel. The first mode can be selected to reduce power consumption compared to the second mode. Controller circuitry is provided to sense signals associated with the control channel and to switch the changeable portion between the first and second modes.

Abstract: An RF amplifier for amplifying a composite RF signal includes a first RF signal and a second RF signal. The amplifier includes a first amplifying stage for providing a first amplified signal a second amplifying stage for providing a second amplified signal, a third amplifying stage for providing a third amplified signal and a fourth amplifying stage for providing a fourth amplified signal, the fourth amplifying stage being arranged after the third amplifying stage. The respective amplified signals are summed up to obtain amplified RF signals.

Abstract: There is disclosed a radio frequency (RF) demodulation circuit comprising: 1) a first RF mixer having a first input port for receiving an in-phase RF signal having a frequency of RF and a second input port for receiving an in-phase local oscillator (LO) signal having a frequency of LO, wherein LO is approximately equal to one-half of RF, and wherein the first RF mixer generates a first intermediate frequency (IF) signal having a frequency of LO; 2) a second RF mixer having a first input port for receiving an out-of-phase RF signal having a frequency of RF and a second input port for receiving an out-of-phase local oscillator (LO) signal having a frequency of LO, and wherein the second RF mixer generates a second intermediate frequency (IF) signal having a frequency of LO; and 3) a first signal combiner for combining the first and second IF signals to generate a composite IF signal, wherein the first signal combiner combines a first leakage signal from the first RF mixer and a second leakage signal from the se

Abstract: A radio communications technique is provided where the operation of a radio interface is controlled based on an event list. The event list specifies a sequence of events which each specify a control task to be performed when controlling operation of the radio interface. The event list may be configured based on event list specification data received.

Abstract: An efficient authentication is made possible by a method for authenticating a subscriber MT (6) for utilizing services in a wireless LAN (WLAN) (10) while using an IP multimedia subsystem (IMS) (3). The inventive method is characterized in that a subscriber MT (6), who is to be authenticated and who is located at a location having WLAN coverage, receives an IP address from the WLAN (10) in an attributed manner, after which the subscriber authenticates himself with regard to the IP multimedia subsystem (3) while giving this IP address. In addition, an element ((WAGW (2)) of the WLAN (10) is informed of the result of the authentication of the subscriber MT (6) with regard to the IMS (3).