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Document Title |
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8150325 |
Blanking system
An exemplary signal interference control system is disclosed that utilizes a computer system, such as programmable logic circuits or computer controlled logic gates, to generate blanking or control...
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8116689 |
Determination of antenna noise temperature for handheld wireless devices
Antenna noise temperature is determined for a handheld wireless communication device which typically includes a radio, e.g. having a wireless transceiver and associated circuitry connected thereto,...
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8072284 |
Split delay-line oscillator for secure data transmission
A split delay-line oscillator for secure data transmission is disclosed. In one embodiment, an apparatus for a split delay-line oscillator for secure data transmission includes a first...
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7894775 |
Determination of antenna noise temperature for handheld wireless devices
Antenna noise temperature is determined for a handheld wireless communication device which typically includes a radio, e.g. having a wireless transceiver and associated circuitry connected thereto,...
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7805120 |
Noise blanker circuit and method for removing noise and correcting a signal
A noise blanker circuit and method of removing impulse noise from a signal and correcting the signal is provided. The circuit includes a detection stage, a pulse removal stage, and a pulse removal...
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7676209 |
Method and system for allocating channels in a cellular communication network
A method of channel allocation in a cellular communication network wherein a radio channel is to be selected for establishment of a connection in an environment with potentially interfering...
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7676204 |
Radio receiver having ignition noise detector and method therefor
An AM receiver including an AM demodulator for demodulating an AM signal received by an antenna coupled to the AM demodulator is provided. The AM receiver further includes a bandpass filter for...
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7613438 |
Method for reducing the effect of impulse noise in a motor vehicle radio
Methods are provided for reducing impulse noise effects in a motor vehicle radio. One method includes the steps of first detecting impulse noise received by the motor vehicle radio. The received...
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7599674 |
Overload protection for receiver front end
An embodiment is a receiver for a communications system that may substantially block unwanted signals in a frequency range to protect the receiver from overload. Simultaneously, the receiver of an...
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7519329 |
Determination of antenna noise temperature for handheld wireless devices
Antenna noise temperature is determined for a handheld wireless communication device which typically includes a radio, e.g. having a wireless transceiver and associated circuitry connected thereto,...
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7499686 |
Method and apparatus for multi-sensory speech enhancement on a mobile device
A mobile device is provided that includes a digit input that can be manipulated by a user's fingers or thumb, an air conduction microphone and an alternative sensor that provides an alternative...
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7489915 |
Squelch circuit and communication apparatus used with the same
A squelch circuit and a communication apparatus used with the same that are able to generate a squelch signal even if a squelch period is short and an operation of a squelch detecting circuit is...
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7440737 |
Noise blanker control
A noise blanker for use in a radio receiver includes an audio blanker (115) configured to mitigate impulse noise associated with a signal received by the radio receiver and a blanker controller...
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7386327 |
Apparatus and method for controlling noise in a mobile communication terminal
An apparatus and method for controlling a volume of comfort noise in a mobile communication terminal. The mobile communication terminal includes a vocoder for detecting a decoding rate of voice...
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7348824 |
Auto-zero circuit
An auto-zero circuit is disclosed. The auto-zero circuit includes a first set of circuits for implementing a first auto-zero phase and a second set of circuits for implementing a second auto-zero...
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7180933 |
Squelch circuitry for high speed high frequency operation
A squelch circuit for operating at high speed and at high frequencies includes a squelch input unit, a low swing pre-amplifier and a sampling and decision circuit. The squelch input unit...
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6961548 |
Method for masking interruptions on playback of received radio signals
A method of masking interruptions in the playback of received radio signals is provided, in which lengthy interruptions are allowed only when modulation of the radio broadcast program currently...
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6961396 |
Digital banking circuit
A digital blanking circuit allows a first digital input signal transition to be passed on to a following stage, but prohibits the passing of subsequent transitions for a predetermined blanking...
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6925114 |
Weak signal processing based on impulse noise blanking
An improved noise reduction system (20) is provided for a radio frequency audio processor having one or more weak signal processing components for generating one or more corresponding control...
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6799026 |
Handset diversity in wireless communications system
A diversity reception handset includes a receiver for receiving pilot and plural increments of traffic sent from a base station within a service area of a wireless communications network. The...
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6795559 |
Impulse noise reducer detecting impulse noise from an audio signal
An impulse noise reducer detects impulse noise in an audio signal by detecting and smoothing the high-frequency amplitude of the audio signal, attenuating the non-smoothed amplitude according to...
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6788923 |
Receiver noise reduction with expanding gated pulses
A noise reducer generates a gate signal by detecting noise in a demodulated signal, and changes the lengths the gate pulses indicating the presence of noise according to the electric-field strength...
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6775526 |
Modulated input signal filter
A modulated input signal is filtered to reduce noise. The state of the input signal controls the state of a switch. Depending upon its state, the switch connects one of two circuits to a gate. The...
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6671503 |
Wireless microphone system
There is provided an improved receiver unit for wireless microphone system. The receiver unit accomplishes desirable mute control in accordance with state transmitting conditions of electric wave...
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6671504 |
Radio squelch techniques
A radio carrier signal is detected (20) after being converted to digital form and is filtered (22). A noise estimator (24) generates a noise estimate signal by estimating the noise in the detected...
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6577851 |
Impulse noise blanker
A radio back-end integrated circuit that includes a blanking switch having a signal input which receives an IF signal, a control input, and a signal output. Also included is a demodulator having an...
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6535724 |
Receiver portion of a telephone
A receiver portion of a telephone includes a differential amplifier stage with a single output, an electroacoustic transducer connected between the output, via a capacitor and ground and a unit for...
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6292654 |
Digital noise blanker for communications systems and methods therefor
A digital noise reduction for a radio frequency receiver communication systems that is field programmable to function with a large variety of signaling schemes or waveforms. The noise reduction...
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6259904 |
Fast squelch circuit and method
A technique is used by a squelch circuit (200) that generates a fast squelch. The technique involves generating a noise signal (211) from a demodulated signal (105), generating a squelch check...
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6137888 |
EM interference canceller in an audio amplifier
A problem in hearing aids or other audio/acoustic amplifier circuits is that external sources of EM energy may be coupled into the electronics of the hearing aid so as to contribute to the acoustic...
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6055421 |
Carrier squelch method and apparatus
A radio receiver operates primarily in a first operating mode to process received signals (410). When a carrier signal detect is triggered while in the first operating mode (415, 420), the receiver...
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5893056 |
Methods and apparatus for generating noise signals from speech signals
In methods and apparatus for generating an LPC-encoded noise signal from an LPC-encoded speech signal, excitation parameters of the LPC-encoded speech signal for a current frame are randomized upon...
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5889821 |
Low noise front-end blanking and interleaving for satellite reception in pulsed interference environments
A method and apparatus to enable high-quality digital transmissions to a satellite terminal operating in proximity to a radar source combines interleaving a sequence of channel symbols at a land...
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5890059 |
Impulse noise blanking apparatus
A method and apparatus for suppressing noise in a radio receiver or the like due to electromagnetic interference generated by the firing of a spark plug which coordinates the operation of a noise...
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5884151 |
Switching device for short time mute switching of reproduction of NF-signal in radio receiver
A circuit arrangement for brief mute switching of the reproduction of an LF signal in a radio receiver for performing additional control operations is described, in which the mute switching is...
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5684840 |
System for eliminating the affected by transmission errors in a digital stream
A system for eliminating the effects of transmission errors in a digital stream is characterized by the presence of a predictor. The output signal of this system is taken from a predicted signal...
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5630217 |
Error-free pulse noise canceler used in FM tuner
A pulse noise canceler in which the sensibility of FM pulse noise detection is decreased when an FM wave exceeding the minimum bandwidth which is predetermined of an FM wave detector is input to...
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5598431 |
Method and apparatus for signal quality detection in a communication system
A signal quality detector (200) determines the quality of an incoming received data signal within a communication device (100). The audio output of the communication device is muted and unmuted...
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5594799 |
Circuit for suppression of short-lived noise-phenomena in a digital audio signal
In a circuit for suppressing short-lived noise phenomena in a digital audio signal, in particular during a temporary test reception of another transmitter, the audio signal is multiplied by a...
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5537675 |
Splatter controlling noise blanker
A splatter control circuit (28) for a noise blanking receiver (10) includes a SAW filter (40) having an output (115) in a main signal path. A noise blanker (27) having a control input (86) and a...
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5493711 |
Radio receiver for locating the strongest signal carrying a selected program
A receiver has a random counter, which outputs a timer signal to a control circuit. A zero-cross point detection circuit generates a detection signal which is input to the control circuit. When the...
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5463662 |
Apparatus and method for reducing errors in data caused by noise through use of blanking
An apparatus for snubbing or blanking digital signals representing a band of signals that includes an encoded carrier signal transmitted over a power line. An average signal level is compared with...
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5333153 |
Signal quality detection method and apparatus for optimum audio muting
A digital communication device (10) comprises a signal quality detector (18) that determines the quality of the received signals and instantaneously mutes and unmutes the voice output (22) of the...
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5303414 |
Method and device for minimizing interference, in particular in connection with FM reception
A method and circuit for suppressing periodic noise interference in a broadcast signal received by a receiver, in which, during reception of the broadcast signal a dip occurs in the amplitude of...
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5263190 |
Vehicular radio receiver having muting circuitry for suppressing noises caused by receiver data pulses
A vehicular radio receiver includes a receiver main body provided adjacent to an antenna mounted on a vehicle body, a receiver operation unit provided in a compartment of the vehicle spaced from...
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5261004 |
Noise blanking circuit for AM stero
An AM stereo input signal is processed by an envelope detector, an in-phase detector and a quadrature phase detector to yield outputs which may carry short noise impulses. Each output is low pass...
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5255319 |
Noise suppressing circuit in an FM tuner
A noise suppressing circuit has a gate for controlling a composite signal applied to a stereo demodulator of an FM tuner, and a detector for detecting a noise included in the composite signal and...
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5212827 |
Zero intermediate frequency noise blanker
An essentially zero intermediate frequency receiver (100) for recovering an information signal from a received signal (110), which includes means for blanking noise signals which may otherwise...
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5210518 |
Apparatus and method for reducing errors in data caused by noise
In a power line communications apparatus an improvement for blanking or snubbing impulse noise. The impulse noise is detected and used to snub the detected signal. The duration of the snubbing...
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5208494 |
Method for the elimination of transients from the operating voltage of TDMA system
This invention relates to a method by which transients can be eliminated in an apparatus comprising a current source and several functional blocks at least one of which produces transients in the...
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