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JP2004222121A |
To suppress the radiation of a high frequency in accordance with the length of transmission lines by reducing a common-mode current component on the transmission line.In a reader/writer 31, a common-mode choke coil 51 is inserted between...
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JP2004215038A |
To reduce reception disturbance in a broadcast wave receiver caused by the radiation noise of a carrier wave.A communication ECU 11 identifies each broadcast wave frequency corresponding to an area including a vehicle position detected b...
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JP2004211694A |
To provide a composite vehicle component, more accurately, the composite vehicle component containing a conductive meshed article.There is provided a composite vehicle component that is capable of attenuating radio frequency interfering ...
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JP2004193951A |
To provide a portable telephone system in which deterioration of reception sensitivity of a radio channel in a reception slot can easily and precisely be prevented in a simple structure.The portable telephone system is provided with a ra...
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JP2004193799A |
To perform stable and reliable communications at all times without being affected by noises emitted from electrical equipment.A master electronic control unit 2 in a power supply superposition multiplex requests slave electronic control ...
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JP2004179861A |
To provide a mobile phone wherein a frequency being an integral multiple of a camera operating clock frequency does not effect a wireless characteristic as noise and capable of preventing a reception disabled state from taking place at t...
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JP3531621B2 |
To provide a mobile wireless application device provided with a function of suppressing electromagnetic coupling between a wireless circuit and a digital circuit placed on one printed circuit board. A current control mechanism is placed ...
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JP3523884B2 |
In a wireless communications system (20), a beacon having a first radiation pattern (28) covering a portion of a subscriber service area (34) covered by a base station is transmitted. A subscriber (36) reception quality is then measured ...
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JP2004512703A |
A method of despreading a target spread spectrum signal containing pseudorandom noise (PRN) code sequences modulated by a data message is disclosed. The method comprises the steps of providing data message information relating to the tim...
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JP2004104820A |
To reduce as far as possible power consumption in each of a plurality of transmitting-receiving stations comprising a spread spectrum communication system, particularly, in a mobile subscriber station unit.In the spread spectrum communic...
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JP2004507967A |
A method of generating a pulse width modulated data stream includes providing a first clock signal having a first frequency and selecting a divisor from a set of divisors for dividing the first frequency to select a pattern rate of a pul...
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JP2004080747A |
To provide a board and an information storage device which ensure the transmission of an analog signal with reduced noise by preventing a digital signal flowing through the wires of an optical scanner from interferring with the analog si...
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JP2004072756A |
To provide a universal data model capable of setting a common threshold to heterogeneous scalar measuring data to deal with a common threshold event in a network.In a system for collecting heterogeneous scalar measuring data from a plura...
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JP3499399B2 |
To provide a new shielding structure in which a shielding case and a piece sub-substrate are disused by a method wherein an enclosing earth pattern is provided on the circumference of the high frequency circuit formed on the first layer ...
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JP2004056275A |
To provide a power line carrier communication equipment for selecting a low pass filter with a proper degree synchronously with transmission power to a power line and enhancing a power consumption efficiency of the low pass filter.A tran...
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JP2004056565A |
To prevent throughput of data transmission from dropping in a PC card type wireless LAN card provided with a metal cover.In this card type wireless communication equipment (wireless LAN card) 10, a printed circuit assembly 20 provided wi...
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JP3495962B2 |
To provide a distortion estimate device that can properly estimate distortion on the basis of a differential phase modulation signal or a phase modulation signal. A phase difference signal generating section 42 receives a prescribed subc...
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JP3493374B2 |
The invention provides a spread spectrum communication system for maintaining an initial transmit power level of a communication station during periods of inactivity. The system comprises a first station (501) and a second station (502),...
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JP2004032578A |
To substantially reduce crosstalk noise which causes an electronic apparatus to malfunction.In signal wirings of three or more transmission lines the product of the transmit end impedance of one fixed signal wiring, on which the output p...
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JP2004032170A |
To provide a noise detector which detects noise signals incoming from external apparatus, decides whether the noise signals influence the interior of an electronic apparatus to output a noise detection signal to the electronic apparatus,...
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JP3490493B2 |
PURPOSE: To prevent a bad influence of mutual interference disturbance upon a reception signal by setting frequencies of first and second local oscillation signals to integer-fold channel interval of an input signal. CONSTITUTION: The fr...
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JP2004023396A |
To prevent radio communications performed by a radio communication module from jamming caused with a clock , at an electronic apparatus which can be connected to the radio communication module performing radio communications and operates...
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JP2004023481A |
To provide an acoustic signal processing apparatus and method therefor which can estimate, with a small calculating amount, noise from the outside highly accurately, and to provide an audio system.The processing apparatus is provided wit...
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JP3487577B2 |
To press ferrite half bodies against each other with the surfaces of the half bodies which are faced opposite to each other. A noise-suppressing device is integrally formed with case half bodies 19, a coupling means which holds the half ...
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JP3488164B2 |
To prevent the occurrence of noise in a substrate by shielding the boundary between an inductor and a substrate, and also to suppress the drop of Q value caused by the eddy current in a shield pattern. An inductor is made of the second m...
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JP3486849B2 |
Complex signal samples of an input signal are supplied to via a frequency down-shifter to a digital filter, and to a time-frequency transform unit which produces a plurality of frequency components each associated with a respective frequ...
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JP2004500663A |
The invention provides an apparatus and a method for generating spread spectrum clock signals, the method comprising the steps of: (1.a) determining a relationship R between a fundamental period T of a clock signal and a period offset DT...
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JP3480832B2 |
To provide a wireless apparatus which can substantially remove the effect on an antenna and circuit of receiving part produced by noise generated by an information processing part. As a receiving section signal rises to be active, a bus-...
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JP3480492B2 |
To provide a heterodyne radio receiver which has a wide intermediate- frequency band and is equipped with a multimode function eliminating the need to mount an IF filter and completely ASIC(application specific integrated circuit)-implem...
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JP3478342B2 |
The invention provides a spread spectrum communication system for maintaining an initial transmit power level of a communication station during periods of inactivity. The system comprises a first station (501) and a second station (502),...
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JP2003533753A |
Modeling a target spectrum (S) is provided by determining ( 21 ) filter parameters (pi,qi) of a filter which has a frequency response approximating the target spectrum (S), wherein the target spectrum is split in at least a first part an...
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JP2003318753A |
To check reception interference when transferring data, etc., to a display, etc., without using a shield.A data transfer bus 41 is provided for normal transfer of data, indifferent to the operation of a transceiver 12, between a controll...
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JP3461783B2 |
To obtain a data interface device, a panel driver and a monitor where EMI can be suppressed by transmitting data in a way that a transmission rate can be changed within a prescribed range of the transmission rate. In a liquid crystal dis...
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JP2003303000A |
To provide an automatic speech recognition system in which both convolutional and additive noises are compensated for, computational cost is reduced and the system is made suitable for a small integrated type system.The method is used to...
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JP3457667B2 |
Within a radio frequency (RF) communications system (200) having a plurality of transceivers (10) operating at various frequencies (F1-FN) within a predetermined range, a method (700-722) and apparatus (600) for selecting an operating fr...
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JP3459363B2 |
To reduce a processing delay without being affected by S/N and to reduce deterioration in sound quality in terms of listening. An input signal is divided into a plurality of frequency bands (22) and power is calculated at every band (24)...
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JP3457280B2 |
Disturbances in a bipolar signal in the case of large line lengths are suppressed. The signal is led to a coarse setting and a fine setting in an equalizer and to a downstream level detector. From there it is fed back to the equalizer vi...
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JP2003289184A |
To provide a multilayered printed wiring board in which signal lines can be laid at a high density while crosstalk noise is reduced.In this multilayered printed wiring board in which signal lines are laid closely to each other in the sam...
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JP2003289522A |
To provide a method and device for suppressing streamed noise in bidirectional CATV system by which streamed noise can be suppressed efficiently at every main line without affected by the used state of an upstream line.The device is prov...
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JP2003529980A |
A spread-spectrum demodulator architecture is presented which utilizes parallel processing to accomplish rapid signal acquisition with simultaneous tracking of multiple channels, while implementing an integrated multi-element adaptive be...
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JP3452932B2 |
An improved discrete multi-tone transmission scheme is describe that contemplates encoding digital data and modulating the encoded data onto a discrete multi-tone signal having a total bandwidth of at least 1.6 MHz. The modulation system...
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JP3449964B2 |
To minimize a spurious noise by turning on/off transmission power corresponding to an enable signal generated from a control section in response to the noise, eliminating a prescribed noise generated from a programmable gain controller w...
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JP3446861B2 |
To surely execute carrier sensing of a dead radio frequency without the influence of spurious radio waves in a mobile radio telephone equipment when a radio base station and a radio mobile station are adjacently installed. In the radio b...
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JP2003258657A |
To provide a phase noise elimination circuit that can be achieved in a compact electric circuit that is easily mass-produced at low costs.In the phase noise elimination circuit, an inputted high-frequency signal is branched into two high...
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JP2003258612A |
To provide a circuit for sufficiently reducing the power source noise at a low cost, even with respect to an LC resonance occurring in a power source.With respect to a CMOS circuit 30 which is likely to generate power source noise, an nM...
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JP2003526852A |
A voltage (Udd) formed by a rectifier (12) passes as a command variable to a clock generator (14) with a clock frequency adjusting device. With a high field intensity on an antenna the voltage is adjusted downwards by raising the clock f...
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JP2003249875A |
To provide a method of efficiently utilizing an ISDN radio link capacity of a spread spectrum communication system, including first and second spread spectrum transceivers.The method comprises a process for delaying a digital data signal...
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JP3442208B2 |
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JP2003234707A |
To provide a noise eliminating circuit in which frequent filter switching is reduced and a noise eliminating filter corresponding to a threshold can be selected.In the noise eliminating circuit for selecting the filters of different nois...
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JP3436239B2 |
To provide a noise eliminating device that can eliminate an external radio wave noise superimposed on a metallic cable adopting the xDSL technology (x-digital subscriber line). An outgoing signal having no outgoing data received by a tra...
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