Abstract: The diversity receiver according to the present invention operates as a multicarrier diversity receiver. The diversity receiver includes weight calculators that calculate a weight coefficient for each carrier based on information about a phase difference between branches and amplitude information on each carrier obtained from a reception frame, and branch combiners that combine reception signals at branches for each carrier based on the weight coefficient prior to signal detection.

Abstract: By receiving and demodulating at least one designated signal out of a plurality of broadcasting signals transmitted in respectively different formats or communication signals and by converting the demodulated received signal into a predetermined radio transmission format for radio transmission, relay-transmission of at least one signal out of the plurality of the broadcasting signals or communication signals is carried out to a communication terminal corresponding to the radio transmission format. Thus, it is possible for a movable terminal to carry out favorable reception of various kinds of data such as a digital broadcast, an Internet broadcast or the like.

Abstract: There is described an RF integrated circuit receiver structure. The structure comprises a receiver channel; a selectable amplification stage associated with the receiver channel; and a selectable diversity channel associated with the receiver channel. There is therefore provided a modular reconfigurable RFIC receiver architecture.

Abstract: A selective power level receiver is provided that includes a selective RF switch to switch an RF signal source to either a low noise amplifier (LNA) for weak signal or an attenuator for strong signals without affecting the input and output impedance levels.

Abstract: A reception circuit is designed to be free from the influence of noise from a Zener diode. This circuit may have a selection unit which selects a desired broadcast signal in accordance with control signal Vt, an amplifier unit which amplifies the broadcast signal, a booster circuit which increases power supply potential B+ to generate an increased potential, a control unit which is responsive to the increased potential, and generates a control signal used to designate a desired broadcast signal so as to supply the control signal to the selection unit, and Zener diode ZD which has Zener voltage Vz larger than maximum potential Vtmax of the control signal. This diode ZD suppresses or limits the increased potential to be equal to or lower than the Zener voltage. Since the Zener diode does not bring about any breakdown operation in a steady state, a noise-free reception can be assured.

Abstract: A method for remotely controlling a vehicle audio system, which is controlled in accordance with an instruction from an infrared remote control unit, uses a radio frequency remote control unit to remotely control the vehicle audio system. A security system receives a command transmitted from the radio frequency remote control unit. In a security control mode, the vehicle security system performs security control based on the command. In an audio control mode, the security system transmits the command to an audio control interface unit. The audio control interface unit converts the command transmitted from the security system into an infrared remote control unit command. Based on the infrared remote control unit command, an infrared emitter is driven to emit infrared rays, thus controlling the vehicle audio system by the infrared rays.

Abstract: A sound system with a radio receiver having the ability to automatically tune to a new radio station if (a) the current radio station is broadcasting a song, program or other content that the user dislikes and/or (b) one of one or more predetermined radio stations is broadcasting content that the listener likes. In one embodiment, the sound system includes a tuner for tuning to a frequency of a radio station and for converting a radio signal transmitted by the radio station to an audio signal; a memory unit for storing a first set of templates, wherein the first set of templates correspond to a to a set of songs, programs, commercials, or other content disliked by the user of the sound system; and a recognition processor, coupled to the tuner and to the memory unit, for receiving the audio signal, generating templates from the audio signal, and comparing the generated templates to at least one of the templates within the first set of templates.

Abstract: A Write Broadcast system and method uses a base station to write sent data to all or some selected number (sub group) of tags in a base station field simultaneously. By unselecting the tags that have been successfully written to, and requesting a response from the remaining tags in the field (or sub group), the system determines, by receiving a response to the request, that there are tags in the field (sub group) that were unsuccessfully written to. Another Write Broadcast signal is sent to these tags. The system is useful for quickly (simultaneously) “stamping” information on the tag memory of a large number of tags in the field of the base station.

Abstract: An embedded digitization system which enables a military platform to receive, transmit and process a variety of types of information for a variety of purposes. The system includes a mission processing capability, a digital message communications capability, a time and position location and navigation capability, a weapons delivery system aim and shoot capability, a sensor input processing capability, a user interface capability, and an input/output processing capability. The system exchanges information through digital message communications with other systems in a theater of operation. Information exchanged and processed by the system includes command and control information, situational information, intelligence information, mission information and host platform information.

Abstract: The present invention relates to a high frequency composite component used in a front end section for processing a high frequency signal between a transceiving section and an antenna in a high frequency circuit of a mobile communication device.

Abstract: In a heterodyne receiver, the effect of an image interference signal that occurs in a case where a low intermediate frequency is used is alleviated. Circuits (12I), (12Q), (13I), (13Q), and (14) are provided to switch a heterodyne system between an upper heterodyne system and a lower heterodyne system. The switching circuits (12I) to (14) switch the heterodyne system into one of the upper heterodyne system and the lower heterodyne system with less image interference on the basis of each reception frequency.

Abstract: A processing unit with balanced outputs transfers a received digital signal to an amplification unit with balanced inputs and outputs. A control unit enables or disables the processing and amplification units in response to a power up/power down signal. To prevent disturbances due to power up/power down transients from appearing in a speaker connected between the outputs of the amplification unit, switches are provided between the outputs of the processing unit and the inputs of the amplification unit. A delay circuit generates according to a predetermined timing program enabling/disabling control signals for the processing and amplification units, and generates control signals for the switches.

Abstract: A communication system comprises a first signal adjusting unit for amplifying a first signal received by a first antenna; a second signal adjusting unit for amplifying and phase-shifting a second signal received by a second antenna to generate a phase-shifted signal; first and second mixers for respectively mixing signals generated by said first and second signal adjusting units to generate respective first and second intermediate frequency signals; a signal combiner for generating an output signal provided to a demodulator, the output signal comprising at least one of the first intermediate frequency signal and/or the second intermediate frequency signal; and a phase detector for extracting phase information from the signals generated by the first and second signal adjusting units.

Abstract: The present invention encompasses a mobile station comprising a transmitter for transmitting outgoing signals from the mobile station and a receiver for receiving incoming signals, the receiver coupled to the transmitter and having N subreceivers, where N is an integer greater than one and each of the N subreceivers may independently be tuned to a desired frequency.

Abstract: A cell phone is provided that may be used with multiple radio formats, such as GSM and CDMA. The cell phone includes a receiver that receives radio signals and converts them into electrical signals. An analog to digital converter is connected to the receiver and converts an analog input to a digital output having an adjustable number of bits at an adjustable sampling frequency. A cell phone application specific integrated circuit is connected to the analog to digital converter, which is used to process the digital output to extract encoded telecommunications data in one of the supported radio formats.

Abstract: A system and method for generating a local oscillator (LO) frequency in a zero intermediate frequency (IF) receiver or transmitter is presented. A signal is received from a voltage controlled oscillator (VCO). The signal has a VCO frequency. The VCO frequency is divided by a number N to produce a signal having a divided-down frequency. The signal having the VCO frequency is then mixed with the signal having the divided-down frequency to produce an output signal having an output frequency. Local oscillator leakage is reduced. Thus, the receiver or transmitter may operate in multiple wireless communication bands and modes and meet the associated specifications.

Abstract: A receiver directs the center of the main beam of the antenna directivity response in a desired direction by passing signals received by n antenna elements 1a to 1d through a phase shifter 3. An output from the phase shifter 3 is passed through a receiving filter 5 and is then amplified by a low noise amplifier 6 to be delivered as an output. The phase shifter 3 is confined together with the receiving filter 5 and the amplifier 6 in a cryostat 8, and the phase shifter 3 as well as the receiving filter 5 and the amplifier 6 are cooled down by cooling means 9 through a cold stage 9a, whereby the thermal noises generated therein are reduced to a minimum.

Abstract: This invention is an application of antenna diversity and two or more multi-channel radios, with a novel cooperative sharing strategy among the multi-channel radios, to aeronautical packet data communications and other communications. It offers the following benefits: enhanced data communications performance in a fading environment; enhanced data communications performance at long range; enhanced data communications performance in the presence of cochannel interference; extendable to an arbitrary number of cooperating peer radios; no single point of failure; no increase in pilot workload or change in operational procedures.

Abstract: An antenna circuit is described which makes it possible to suppress intermodulation products. This antenna circuit includes an antenna connection device to which at least one first antenna can be connected, and the antenna connection device can be connected to an output of the antenna circuit over at least two signal paths. An antenna signal can be transmitted over each signal path. Transmission of a second antenna signal over a second signal path is attenuated by a predetermined attenuation value in comparison with a transmission of a first antenna signal over a first signal path. An analyzer unit is provided to determine the level of a weighting signal which is derived from an antenna signal transmitted to the output of the antenna circuit. An operating device is provided to connect only the first signal path to the output of the antenna circuit when the detected level is below a first predetermined level.

Abstract: A method for selecting to activate personal digital assistant (PDA) or mobile phone in an electronic device is disclosed. The device is operable to select to activate PDA or mobile phone. When the device is enabled, user can select to activate PDA or mobile phone through a menu. Thus a desired PDA or mobile phone is activated for use after the selection. By utilizing this, user may select to activate PDA or mobile phone in the device, thereby preventing from violating flight safety rules by unintentionally turning on mobile phone while taking an airplane. Further, such option can greatly enhance the adaptability of the electronic device, thus attracting more people to use it.

Abstract: A wireless communication system exposes first stage filtered energy estimates to a second stage filter whose length dynamically varies with time. With the second stage filter, it is possible to further suppress noise in low SNR conditions without affecting the overall filtering response time.

Abstract: A remote control system in which a program-up or program-down activation on a control remote device effects the selection of the next or prior available channel that is likely to contain a program of a particular selected genre, or category. The system includes an identification of those programs that are likely to relate to each particular category. When the user selects a category, the user incrementally selects from the programs contained within the selected category. In the system, a list builder includes a number of capabilities for improving the selective quality of the program selection, having access, for example, to an information source that provides the time of each scheduled program on each channel, and an indication of each program's genre, rating, and other related items.

Abstract: In a receiver, either an FM/AM signal to be used for a keyless entry system or a high frequency signal to be used for an automobile audio system for FM broadcast is applied to a first converter. An IF limiter amplifier amplifies the output signal of the converter and subsequently limits the amplitude of the output signal to a predetermined level. An FM detector circuit FM-detects the output signal of the IF limiter amplifier. A stereophonic demodulation circuit demodulates the output signal of the detector circuit. A high frequency signal for AM broadcast is fed to an IF amplifier by way of a second converter. Either the output signal of the IF limiter amplifier or that of the IF amplifier is applied to an AM detector circuit.

Abstract: A technique is used for providing additional information about a broadcast presentation that allows a user interested in the additional information to acquire it easily, using a selective call device or a television remote control device to easily acquire an information address during the broadcast when a prompt is presented during the broadcast. An advertiser can send the additional information over a wide area radio selective call communication system or can post it at a universal resource locator of a computer network. The information address is used to acquire the additional information. The information address can be stored, selected and deleted in the selective call device or remote control device. The prompt can be disabled or enabled manually or based on location.

Abstract: In a receiver, either an FM/AM signal to be used for a keyless entry system or a high frequency signal to be used for an automobile audio system for FM broadcast is applied to a first converter. An IF limiter amplifier amplifies the output signal of the converter and subsequently limits the amplitude of the output signal to a predetermined level. An FM detector circuit FM-detects the output signal of the IF limiter amplifier. A stereophonic demodulation circuit demodulates the output signal of the detector circuit. A high frequency signal for AM broadcast is fed to an IF amplifier by way of a second converter. Either the output signal of the IF limiter amplifier or that of the IF amplifier is applied to an AM detector circuit.

Abstract: A preferred embodiment of the present invention generally comprises a hand-held two-way radio employing digital selective calling. The hand-held two-way radio further comprises a VCO operative to modulate the radio signal frequencies of a guard channel such that the guard channel can be changed by changing the output of the VCO. In addition, the present invention comprises a hand-held two-way radio comprising circuitry operative to function according to the digital selective calling international standards, and a VCO operative to modulate the radio signal frequencies of a guard channel such that the guard channel can be changed by changing the output of the VCO. A fourth embodiment of the present invention comprises a hand-held two-way radio comprising circuitry operative to send and receive GPS data, and a VCO operative to modulate the radio signal frequencies of a guard channel such that the guard channel can be changed by changing the output of the VCO.

Abstract: An integrated circuit including a structure of inductances on a semiconductor substrate, intended for operating at frequencies greater than several hundreds of MHz, including a first inductance formed by a conductive track and having first and second terminals respectively connected to each of the two ends of the conductive track, including a second inductance formed by the conductive track between the second terminal and any intermediary point of the conductive track connected to a third terminal, said second and third terminals forming the two terminals of the second inductance, and means for setting the third terminal to high impedance when the first inductance is used.

Abstract: A radio selective-calling receiver that defers indication of receipt of a call for the receiver until after a further frame when the further frame is also for the receiver. A data separating section takes in demodulated signals by sampling. When the receiver's calling number exists in the received data, a controller waits until the next frame that is also an “own” frame, to output display signals or sound signals. Therefore, at the time when the own address is being received, the informing operation can be prevented and the receiving operation can be implemented in a more stable receiving state. As a result, the deterioration of the receiving sensitivity is prevented and the effect that the error of the receiving data is decreased can be obtained.

Abstract: A system is provided to prevent the generation of radio waves of local oscillation from an FM multiplex receiver 11 within a frequency band which adversely affects an FM radio 12 without providing an isolation buffer. The FM multiplex receiver 11 and the FM radio 12 are connected via a main controller 13. The main controller 13 discriminates whether or not the FM radio 12 is on. In the case that the FM radio 12 is on, the main controller 13 controls the tuning of the FM multiplex receiver 11 lest the tuning frequency of the FM multiplex receiver 11 should be set to a specified prohibited frequency.

Abstract: A multi-mode, multi-band, multi-user radio system architecture includes four channels of exciter circuits and receiver circuits coupled to a digital signal processing array. Each of the exciter and receiver circuits includes three separate signal paths for three separate frequency ranges of analog signals. Each path includes an analog-to-digital converter or a digital-to-analog converter for converting both modulated analog signals to modulated digital signals and modulated digital signals to modulated analog signals. The digital signal processing array performs modulation and demodulation functions for the radio system.

Abstract: A system that partitions or divides the functions of a radio into channels and divides the functions of each channel into two major functions: 1) antenna interface and power amplification; and 2) hardwired mixing, modulation/demodulation and signal processing and further partitions the mixing through signal processing functions into the functions of a) programmable analog mixing and b) programmable digital modulation/demodulation and signal processing. Control and user interface functions, if needed for a particular application can also be functionally partitioned.

Abstract: An information or broadcast receiving system and a control method therefor are provided for preventing a switch noise generated during the switching of antennas of a receiver provided with a plurality of switchable antennas from deteriorating a receptive state of an other receiver. When a detector 62 of a main controller 3 detects that a radio 1 is receiving an AM broadcast, a signal output device 63 causes an FM multiplex receiver 2 to stop the switching of a main antenna 31 and an auxiliary antenna 32 by a diversity circuit 33 and to select the main antenna 31.

Abstract: A system is provided to prevent the generation of radio waves of local oscillation from an FM multiplex receiver 11 within a frequency band which adversely affects an FM radio 12 without providing an isolation buffer. The FM multiplex receiver 11 and the FM radio 12 are connected via a main controller 13. The main controller 13 discriminates whether or not the FM radio 12 is on. In the case that the FM radio 12 is on, the main controller 13 controls the tuning of the FM multiplex receiver 11 lest the tuning frequency of the FM multiplex receiver 11 should be set to a specified prohibited frequency.

Abstract: Alternative notification methods for a portable wireless receiver that is able to receive paging objects (i.e., data objects) in addition to conventional alphanumeric page messages. When a paging object is received, the user may be notified of the receipt of the paging object using a visual alert or an audible alert. The user can selectively determine whether the sender of the page object will be allowed to determine the type of audible and/or visual notification provided the user. Various parameters associated with each type of directory in which page objects are stored and with the page objects indicate the preferences of the user and the sender for notifying the user of the receipt of the page object. The invention is also applicable to other types of portable wireless data receivers, such as a cell phone.

Abstract: A system for providing wireless pointer control for controlling electronic equipment, including a remote control pointer device capable of generating a signal having multiple signal components with different frequencies and a base station capable of receiving and decoding the signal having multiple signal components. The base station then interprets the multiple signal components to determine the orientation of the remote control pointer device to properly generate a pointer control signal for properly selecting a particular piece of equipment to receive remote commands or data, and where appropriate, properly displaying and positioning a cursor displayed on the electronic equipment.

Abstract: A Write Broadcast system and method uses a base station to write sent data associated with no particular destination tag or tags, by radio frequency signal, to all or some selected number (sub group) of tags in a base station field simultaneously. By unselecting the tags that have been successfully written to, and requesting a response from the remaining tags in the field (or sub group), the system determines, by receiving a response to the request, that there are tags in the field (sub group) that were unsuccessfully written to. Another Write Broadcast signal is sent to these tags. The system is useful for quickly (simultaneously) "stamping" information on the tag memory of a large number of tags in the field of the base station.

Abstract: A broadcasting signal receiving apparatus includes a first signal receiving portion for receiving selectively frequency-modulated broadcasting signals to obtain a frequency-modulated intermediate frequency signal, a first band pass filter through which the frequency-modulated intermediate frequency signal passes, a first demodulator for frequency-demodulating the frequency-modulated intermediate frequency signal to obtain a first demodulation output signal, a second signal receiving portion for receiving selectively amplitude-modulated broadcasting signals to obtain an amplitude-modulated intermediate frequency signal, a second band pass filter through which the amplitude-modulated intermediate frequency signal passes, a second demodulator for amplitude-demodulating the amplitude-modulated intermediate frequency signal to obtain a second demodulation output signal, an output portion for obtaining a reproduced information output based on one of the first and second demodulation output signals, a signal supplyi

Abstract: A paging receiver having two warning modes, i.e., an audible mode and a vibrating mode, is provided. A vibrating motor of the paging receiver receives a voltage for controlling the level or intensity of vibrations provided by the motor. Various vibration voltage levels are provided to a multiplexer, and the multiplexer is controlled to sequentially output the various vibration voltages applied thereto, wherein each succeeding vibration voltage output by the multiplexer has a voltage level higher than a preceding vibration voltage.

Abstract: A radio paging selective receiver determines that a received message is unread based on the time difference between the message reception time and the current time being larger that some predetermined value of time, and the paging selective receiver provides an indication of the unread message by displaying the reception time of the unread message in a second fashion which is visibly different from a first fashion normally used to display the current time.

Abstract: Transmission mode selection is enabled, so communication reliability, transmission speed, and equipment utilization efficiency are all high. A first transmission system whereby spectrum spreading is accomplished with a spread code 1 and data is transmitted, and a second transmission system whereby data is transmitted with a spread code 2, are provided. In high-reliability transmission mode, identical data from a data buffer is transmitted through both the first and second transmission systems to achieve space diversity. In high-speed mode, data divided by a data division circuit is transmitted simultaneously through the first and second transmission systems, making possible efficient data transfer. Control information insertion circuits append transmission mode data to the transmitted data.

Abstract: In a receiving apparatus for radio data communications, even after a carrier is detected in a received signal, when a start-delimiter is not detected, or when a message broadcasting packet and/or a local packet for the apparatus is not detected, the supply of a clock signal to a data demodulating section for demodulating the modulated signal is stopped.

Abstract: Diversity reception apparatus includes a number of receivers each having a distortion detector. There is a common output channel. A comparator compares the signals detected by detectors and provides a control signal to a selector or switching circuit that couples that receiver having the preferred received signal to the common output channel.

Abstract: A remote control system for actuating special effects theatrical devices is disclosed in which a transmitter generates and transmits two different signals, and a receiver includes first and second receiver circuits such that the first signal arms the receiver but does not actuate the special effects theatrical device unless and until said second signal is also received.

Abstract: An on-vehicle receiving system for optimizing the receiving performance of a radio receiver and a remote controlled receiver, whereby a remote-controlled receiver and a radio receiver share an on-vehicle antenna. A key detector for detecting whether an ignition key is fitted into a key cylinder of the vehicle is employed and a selector switch for connecting the on-vehicle antenna selectively to the remote-controlled receiver or the radio receiver are incorporated. When the key detector detects that the ignition key is fitted into the key cylinder, the selector switch selects the radio receiver. When it is detected that the ignition key is not fitted into the key cylinder, the remote-controlled receiver is selected. In one embodiment, a remote-controlled receiver and a radio receiver share not only an on-vehicle antenna but also part of receiving equipment. The remote-controlled receiver and radio receiver can also share the frequency and modulation form employed.

Abstract: In a video recorder (2) having an electronically tunable tuner (19) and a connector (4) to which a cabling (6) can be connected, which cabling can also be connected to a connector (5) of a television receiver (3) which also has a tuner (46), at least one comparison device (69, 75, 130) of the video recorder (2) is connected to the tuner (19) of the video recorder (2) and to the connector (4) of the video recorder (2) via each time one connection (65, 66, 73, 77) in order to compare at least one component of one of the two received signals supplied by the tuner (46) of the television receiver (3) and applied to the connector (4) thereof with the corresponding component of the received signal supplied by the tuner (19) of the video recorder (2), which comparison device (69, 75, 130) supplies an inequality signal in the case of inequality of the signals applied to it, and an equality signal in the case of equality of the signals applied to it, the tuner (19) of the video recorder (2) being successively tuned to

Abstract: A radio frequency (RF) antenna switch (136) and associated method of operating the same is provided for switching between a first antenna (109) and a second antenna (111). A first mixer (125) has an input terminal 124 coupled to the first antenna (109) and has an output terminal 126. A second mixer (129) has an input terminal 128 coupled to the second antenna (111) and has an output terminal 130 coupled to the output terminal of the first mixer (125). The first mixer (125) and the second mixer (129) are alternatively enabled responsive to the state of an antenna select signal (141). Additionally, the common output terminals 126 and 130 of both the first mixer (125) and the second mixer (129) are matched to a first intermediate frequency stage (131). The RF antenna switch (136) advantageously provides low loss and low current drain.

Abstract: A signal combiner for use in a space diversity radio receiving system. The signal combiner accepts two signals which have been received at physically diverse locations and which have been converted from radio frequency to intermediate frequency. Each of the signals is checked for signal strength and for amplitude versus frequency dispersion. Each signal is run through a separate amplitude slope equalizer which removes amplitude slope. Each signal is then run through a separate squelch circuit which either attenuates the signal, or passes it on undiminished. The squelch circuits are controlled by a control circuit which selectively activates one or neither of the squelch circuits based on the difference in signal strength between the two received signals and the signal dispersion of each of the signals. The outputs of the squelching circuits are then combined to create a composite signal which is comprised of one or both of the equalized signals.

Abstract: Method and apparatus for synchronizing performance of audio, lighting, animation, and special effects programs at a plurality of remote locations, such as on parade floats, in which the programs are stored at each location as digitally-encoded information in the memory of one or more controllers, and DTMF tone bursts are transmitted over a selected radio frequency as a synchronization signal to each remote location for controlling synchronous performance of the programs by audio, lighting, animation, and special effects systems on the floats. The DTMF tones control retrieval from an audio controller of an audio program and a SMPTE time code signal for synchronous control of the lighting, animation, and special effects systems.

Abstract: In an earth-based receiving station for receiving radio signals transmitted from a satellite relay station, a common first frequency converter and at least two receivers are provided. One of the receivers is used as a control receiver to receive a CSC carrier frequency transmitted from the satellite, to generate a first local oscillator frequency phase-locked to the CSC carrier frequency, and to supply the first local oscillator frequency to the common first frequency converter. Other receivers are used as channel receivers for receiving channel frequencies. In case when the control receiver is in trouble, any other receiver can be used as a control receiver.

Abstract: A receiver has a plurality of receiving systems connected to a plurality of antennas, respectively, and a selective switching circuit for carrying out selective switching between output signals from the plurality of receiving systems to output an output signal from a receiving system in the most satisfactory receiving state, wherein the selective switching circuit has a fuzzy inference operation unit for discriminating receiving states of respective receiving states by a fuzzy inference. Accordingly, it is possible to synthetically judge the receiving state of the receiver to easily and stably select the optimum receiving system in the receiver.