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JP4001935B2 |
In a system in which a non-random, noise-free signal is disturbed by random noise, one first determines a way to measure the difference between two signals, and one also selects a measure of complexity for signals. Based on a series of d...
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JP3995741B2 |
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JP2007274730A |
To provide a method and apparatus for increasing receiver immunity to interference. The power level of a received signal is detected and if the power level meets or exceeds a predetermined power threshold, by providing a by-pass path 730...
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JP2007269261A |
To provide a sensor device capable of reducing the radio noise generated by an electric signal emitted from a sensor electrode provided on a vehicular seat. The sensor device comprises a sensor electrode 11 provided on a headrest of a ve...
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JP3991589B2 |
A clock generating circuit 10, for generating a clock signal of which frequency is variable, has a delay circuit 20, a selector 30 and a control circuit 40. The delay circuit 20 has buffers 21 to 24 for delaying the input clock signal an...
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JP3988802B2 |
A receiver or receiver system for high speed data communications having a radio frequency noise canceller is disclosed. The radio frequency noise canceller removes radio-frequency noise from received signals over a transmission medium by...
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JP3989831B2 |
A relay station is composed of a main reception antenna 1 for receiving both a radio wave of a parent station and a go-around radio wave of a relay station, a subsidiary reception antenna 2 for receiving the go-around radio wave of the r...
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JP3986565B2 |
A block interleaver (212) suitable for communication over fading channels with convolutionally coded signals as input is disclosed. The block interleaver (212) implements multiple interleaving distances which are matched to the particula...
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JP3979693B2 |
A modem connected to a telephone line and capable of preventing noise from being generating upon the modem being powered-on or reset includes a ring detector for receiving a ring signal associated with an incoming telephone call through ...
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JP3977192B2 |
A direct conversion transceiver capable of reducing a DC offset, using a multi-chip module is provided. In the transceiver, a mixer and an element constituting a local oscillator are positioned above a shielding ground surface, and an in...
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JP3975287B2 |
A digital spread spectrum clock circuit is made variable by employing RAM memory (29), and a multiplexer (39) to receive initiation data before the circuit is ready to run normally. A second counter (17) and an adder (25) each receiving ...
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JP2007221651A |
To provide a microphone system which can effectively extract desired waves, even when ambient noise is present and can be made compact. The microphone system includes a first microphone 10 for acquiring a first audio signal P1; a second ...
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JP3953888B2 |
To provide a data transmitter capable of realizing a frequency spread with a comparatively simple configuration to lower a peak of an energy level of transmission data, and eliminating mutual interference with other communication equipme...
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JP2007195218A |
To remove or compensate for radio interference that become a severe fault for a receiver capable of appropriately receiving a transmission data signal. Disclosed are radio frequency (RF) interference cancellation techniques that effectiv...
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JP2007521783A |
Measurements for handoff are made by a wireless transmit/receive unit (WTRU) operating with a switched beam antenna in a wireless communication system. The switched beam antenna is a smart antenna generating a plurality of directional be...
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JP3948466B2 |
To prevent higher harmonics other than a necessary higher harmonic from being subjected to frequency conversion so as to interfere with the base band signal in a broadcasting channel frequency band. A high frequency signal receiving circ...
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JP2007166678A |
To provide optical analog equipment, capable of suppressing optical beat noise, by securing a broad dynamic range in transmitting SCM-multiplexed analog signals from multiple slave stations to their master station.In slave stations 1a, 1...
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JP3936421B2 |
To manage interference between adjacent channels in a cellular radio communication system by managing the interference based upon the function of a communication channel service quality coefficient in the system. A mobile radio telephone...
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JP3932248B2 |
To provide a receiver for avoiding the deterioration in reception quality due to interferences, when the local oscillation frequencies of both tuners are in a specific relationship in the receiver for incorporating a plurality of direct ...
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JP3926628B2 |
A termination device for a telephone line of a wire based telephone system, said termination device (30) comprising: a high pass filter (39) for separating signals within a frequency band used by a high-speed modem (13) for data transmis...
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JP3925497B2 |
To prevent a great leak field wave from being generated by a flow of a large current caused by a reflected wave or intercode interference in a junction of a power line in a leak field suppression transmission method and apparatus in powe...
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JP3923531B2 |
A system and method for reducing the interference experienced by sensitive electronic devices, such as hearing aids, operative in the vicinity of CDMA user communication devices. A transmitter of the communications device is configured t...
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JP3925213B2 |
To prevent the occurrence of a large leakage field wave caused by a large current from a reflection wave at a branch point of power line or interference between codes in a method and device for suppressed leakage electromagnetic field co...
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JP3918027B2 |
To provide a noise removal method for a mobile terminal device that enables TDMA noise in the mobile terminal device used in a GSM system to be removed. The mobile terminal device for transmitting and receiving data and signals to and fr...
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JP3917625B2 |
A data analysis unit outputs a plurality of the analytical results by performing various analyses on analytical data concerning a set of analytical objects from different viewpoints and different grading for re-arrangement and systematiz...
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JP2007512736A |
A system for initial downlink transmit power adjustment for non-real time (NRT) services in a wireless communications network includes a controlling radio network controller and a Node B. The controlling radio network controller includes...
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JP2007511966A |
A method and apparatus for reducing echo in a communication system are provided. A first signal including a voice component associated to a speaker is received. The first signal is processed to derive a harmonic feature of the voice comp...
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JP3908926B2 |
To provide a video wireless transmission reception system that can excellently transmit and receive video and audio by preventing missing of a communication signal and deterioration in an error rate. A high frequency transmission circuit...
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JP3908477B2 |
To provide a data processing terminal that the 2nd ground plane of a slave circuit board does not generate interference electromagnetic field to wireless communication. The 2nd ground plane 15 of nearly a rectangular shape is connected t...
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JP3905317B2 |
To improve reliability of electromagnetic compatibility countermeasure. A sub-rack device 21 has a lattice member 29 of a front surface of a BWB 28. The lattice member 29 consists of an aluminum die-cast lattice body 40 and a conductive ...
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JP3904453B2 |
An improved spread spectrum clock generator circuit is provided which automatically compensates for variations in passive component values and system gain and charge pump current in a Phase Locked Loop circuit. The pulse widths of the UP...
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JP3902464B2 |
To provide a system clock generator capable of largely reducing interference. This clock generator is provided with a random number generator 1 and a phase modulator 4, and an integrator 3 for integrating random numbers z1 and z2 is inse...
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JP2007081803A |
To provide a radio-telephony device making deaf persons hear more easily by further inhibiting a noise magnetic field.A slave machine 1 has an RF 3 transmitting and receiving a call as radio waves, a control unit 8 controlling the RF 3, ...
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JP2007082054A |
To operate a plurality of tuners while removing jamming among them.The receiver is provided with a plurality of tuners 3a and 3b performing channel selection of received signals distributed by a distributer 2, respectively. In order to e...
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JP3895436B2 |
To provide a communication system capable of eliminating interferences between radio equipments. This radio communication system 10 is provided with a transmitter-receiver 12 and plural remote radio communication equipments 14A and 14B. ...
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JP3896894B2 |
To provide a power amplifying device which suppresses spurious radiation and reduces the interference to a tuner not by changing a carrier frequency but by controlling the drive signal generation method. A class D amplifier 1 amplifies t...
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JP3895520B2 |
To provide a clock modulation device relative to the device suitably employed to an electric device of a vehicle having the need for taking an EMI measures, and capable of reducing undesirable radiation noise with a small quantity of spe...
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JP2007074418A |
To provide a kind of an IC that a frequency mixer, a local oscillator, and a PLL circuit are built in, which is capable of preventing oscillation signals of receiving systems from interfering with each other and can be more reduced in co...
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JP3887028B2 |
PURPOSE: To obtain a signal, which characterizes each of primary signals from plural signal sources mixed by linear convolution, with a high precision in a small number of signal calculation processing stages. CONSTITUTION: A signal sour...
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JP3888239B2 |
To obtain reproducing sound having sharpness, reality and clearness like an original analog signal. A high-frequency generating circuit 4 detects a maximum value VMAX and a minimum value VMIN of a digital voice information while a delayi...
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JP3874241B2 |
To provide a module for a wireless communication device, which can transmit a fundamental wave with a small loss and reduce second harmonics to be a desired value or below in the entire module. In a front end module for a wireless commun...
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JP3853375B2 |
In an electronic circuit, comprising electrical and electronic components and their connecting lines (3) on a printed circuit board (2), in which case a shielded housing encloses the electronic circuit, attenuating radiofrequencies, in o...
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JP3851506B2 |
Data transmission within a broad-band communication system occurs as follows: During time periods where a remote unit (113) is not actively communicating to a base station (100) utilizing either a fundamental or a supplemental channel, t...
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JP2006319908A |
To take measures for electromagnetic waves generated from an exchangeable HDD unit.The exchangeable HDD unit (20) is provided with a first substrate (43b) and a second substrate (56) composed of a member shielding the electromagnetic wav...
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JP3847222B2 |
To remove noise spikes from a signal which varies in intensity, specially, a signal which has its amplitude modulated. A method of removing noise spikes from an electric input signal having an AC component comprises the stages of decidin...
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JP3849551B2 |
To realize the coexistence of a plurality of ultra wide band (UWB) radio communication networks with different signaling systems. A common beacon signal and the format of a portion of control commands are stipulated between a plurality o...
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JP2006314143A |
To provide a technology capable of reducing the power consumption of each of a plurality of transmission reception stations configuring a spread spectrum communication system, particularly, mobile subscriber station units.In the spread s...
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JP3846961B2 |
To lower the level of radiation noise by communicating a signal having no repeatability substantially in a period of intermitting the data communication, when a serial data communication is intermitted after establishing the synchronizat...
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JP3842821B2 |
A noise suppression system implemented in communication system provides an improved update decision during instances of sudden increase in background noise level. The noise suppression system, inter alia, generates an update by continual...
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JP3842486B2 |
To realize a detour canceler in the broadcast repeating place of ground digital broadcast where SP is not transmitted by providing a complex division circuit with a polar coordinate conversion circuit and an orthogonal coordinate convers...
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