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JP4564050B2 |
Receiver diversity in a wireless device is controlled in response to operating conditions, transmission requirements, and control settings. The control of diversity reduces power consumption by enabling receive diversity on given conditi...
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JP4564012B2 |
The present invention relates to wireless networks using cooperative relaying which in a communication session involve more than one relay station. In the method according to the present invention, a transmitter 210′, a receiver 220′...
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JP4561154B2 |
Disclosed is a high frequency apparatus which eliminates an influence of interfering signals. An interference-cut filter (24) for eliminating interfering signals is disposed between an input terminal (22) and a mixer (27). The interferen...
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JP4557486B2 |
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JP4552321B2 |
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JP4553941B2 |
A wireless communication device comprises a number of sub-systems operably coupled to a data interface for routeing data between the number of sub-systems. A clock generation function generates a clock signal substantially at a data tran...
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JP4550661B2 |
The present invention comprises methods and circuits for spread spectrum frequency modulation that reduce peak spectral noise at the outputs or inputs of switching regulators. More specifically, the present invention modulates the operat...
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JP4531993B2 |
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JP2010182995A |
To improve suppression effect on intermodulation with respect to a shield device for a signal amplifier.Shield materials 21 are added on an internal surface of a case 22 containing a signal amplifier circuit 10, and each of the shield ma...
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JP4519818B2 |
A method of suppressing leakage electromagnetic fields on a communication line or a power line having reflected waves includes the steps of (a) transmitting a first impulse from a transmission end and (b) transmitting a second impulse fr...
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JP4511796B2 |
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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JP2010525672A |
A control module interconnecting a transmitter portion and a signal receiver portion of a mobile device is provided. The control module monitors the transmitter portion of the mobile device and, based on the monitored condition, alters t...
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JP4500920B2 |
A DDS circuit arranged to provide a selectable spread spectrum based output clock signal is described. The synthesizer includes a phase accumulator circuit, a reference clock source coupled to the phase accumulator circuit arranged to pr...
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JP2010523058A |
This disclosure describes techniques for reducing adverse effects of transmit signal leakage in a full-duplex, wireless communication system. The disclosure describes techniques for reducing adverse effects of second order distortion and...
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JP2010523047A |
A fast accurate multi-channel frequency dependent scheme for analyzing noise in a signal processing system is described herein. Noise is decomposed within each channel into frequency bands and sub-band noise is propagated. To avoid the c...
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JP2010154362A |
To provide a mobile terminal capable of reducing influences to be exerted on antenna characteristics in television broadcast or radio communication, by a transmission frequency of a data signal to an electronic device such as a display s...
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JP4493830B2 |
The present invention provides an RACH receiving apparatus in which the components can be constructed in a small scale. The RACH receiving apparatus performs a demodulation processing so as to divide it into two stages of a first demodul...
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JP4488331B2 |
A checksum is calculated on a database stored in a SIM card when changes are made to a database stored therein. This checksum can be stored in a mobile phone, e.g., with the change log. When synchronization between devices is to be perfo...
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JP4484103B2 |
To operate both an analog circuit and a digital circuit independently, and to reduce an influence on the operation of the analog circuit affected by the noise of the digital circuit even in a higher operating frequency while suppressing ...
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JP2010130668A |
To provide a receiving system for reducing/canceling the influence of noise generated on a receiving path of an analog radio inside a vehicle. An analog radio receiving system comprises: an antenna mounted in a vehicle; a first converter...
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JP4477345B2 |
A thin-film common mode filter is provided, comprising: a pair of magnetic plates; an upper coil conductor and a lower coil conductor formed between the pair of magnetic plates, spirally wound in the magnetic plate surface direction, and...
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JP4476704B2 |
A semiconductor integrated circuit device includes a semiconductor substrate; at least one integrated circuit block formed in the semiconductor substrate; a first electrode pad which receives a first clock, the first electrode pad being ...
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JP4479625B2 |
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JP4474476B2 |
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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JP4466426B2 |
To provide a non-contact reader/writer that is hardly affected by a reflection wave from a fluorescent lamp. The non-contact reader/writer includes: a reception antenna 1; an optical sensor 8; and a coefficient feedback circuit 9 acting ...
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JP4463332B2 |
A method for adjusting the gain of a receive circuit, thereby improving a receiver's immunity to interference. The circuit has an LNA which amplifies the received signal (1702). The receive signal power is controlled by enabling or disab...
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JP4454926B2 |
The device comprises an integrated circuit (IC) and a set of connection pads for connecting the integrated circuit to at least one pair of transmission lines designed to conduct electric signals to a destination, the first pair of connec...
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JP4452360B2 |
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JP2010512118A |
A wireless device that covers the wireless communication frequency bands incorporates a frequency domain monitor to adaptively modify the time domain waveform of a clock signal to suppress even order harmonics caused by asymmetry in the ...
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JP2010087024A |
To provide a circuit board capable of reducing high-frequency noise generated from an electronic circuit mounted to the circuit board.A main board 10 is equipped with an electronic circuit having the source of high-frequency noise. The m...
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JP4441021B2 |
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JP2010068529A |
To provide a method and apparatus for increasing receiver immunity to interference.The power level of a received signal is detected. If the power level meets or exceeds a predetermined power threshold, a low noise amplifier 703 is provid...
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JP4439124B2 |
A transceiver circuit for transmitting a data signal over a communications bus at a predefined bit rate includes a transmitter. The data signal is a digital signal having first and second logic levels. The transmitter receives and modifi...
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JP4436387B2 |
An apparatus to increase a radio receiver's immunity to radio frequency interference, the radio receiver receiving a signal, the apparatus comprising: a switch (1105) coupled to the received signal, the switch (1105) having an open posit...
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JP2010050810A |
To provide a noise distortion correction filter for a communication line for effectively correcting time waveform distortion occurring in a communication signal flowing in the communication line by electromagnetic noise from the outside,...
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JP4425928B2 |
Measurement opportunities are provided to a wireless transmit/receive unit (WTRU) operating with a switched beam antenna in a CDMA wireless communication system. The switched beam antenna is a smart antenna generating a plurality of dire...
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JP4406631B2 |
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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JP4405954B2 |
An antenna is mounted in a vehicle for receiving a radio wave of a specified wavelength, and an electronic device such as a meter device is mounted in the vehicle. The electronic device tends to generate radiation noise when being operat...
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JP2010016427A |
To improve a link budget, to secure stability of communication quality when communication is established, and to enlarge a communicable range by increasing a signal-to-noise ratio while maintaining transmission power by a simple configur...
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JP2010010268A |
To provide a jamming electromagnetic wave-reducing device or electronic equipment exhibiting an electromagnetic wave-reducing effect in a wide band against linear polarization.The jamming electromagnetic wave-reducing device reducing jam...
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JP4387817B2 |
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JP4376611B2 |
The frequency modulation circuit includes: a phase shift section for receiving a multiphase clock signal composed of a plurality of clock signals having a predetermined phase difference therebetween and shifting the phase of the multipha...
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JP4372549B2 |
A radio communication system includes a communication channel for the transmission of data packets from a primary station to a secondary station. In operation, on detection of a data packet, the secondary station transmits an acknowledge...
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JP4370418B2 |
A method of vectored transmission in a Digital Subscriber Line (DSL) system using Discrete Multi-tone communications over a plurality of communications lines, each of the plurality of communication lines have at least one transmitter and...
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JP4369581B2 |
A channel estimation section 112 estimates the states of channels used for pieces of mobile station apparatus (A) and (B), using signals demodulated by radio processing sections 110, 111. A best SIR calculation section 118 calculates coe...
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JP4373267B2 |
The present invention provides a spread spectrum clock generator that is capable of preventing phase jumps and jitters and suppressing the occurrence of Electro Magnetic Interference components and that can easily be applied to large sca...
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JP4370621B2 |
In a cellular phone 100, a directional coupler 20 provided between a transmitter for communication 32 and a duplexer 30 extracts a transmitted signal, and a detector 21 detects the signal and detects a transmission power level. Next, the...
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JP4364121B2 |
A method of operating a mobile device is disclosed. A first activity of the mobile device is detected. The following two operations are executed upon detection of the first activity; (i) wireless transmission of data over a wireless data...
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JP2009253994A |
To solve the following problem encountered when an output cord is carried together with a portable terminal device: to cope with high-frequency noise, a ferrite core is attached to the output cord and this degrades the portability of the...
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JP4351762B2 |
According to the present invention a transmitter for the wireless transmission of information data for example according to the OFDM system is provided. The transmitter comprises means (9) for random orthogonal transforming (ROT) of bloc...
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