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7058737 |
Network device interface for digitally interfacing data channels to a controller via a network
The present invention provides a network device interface and method for digitally connecting a plurality of data channels, such as sensors, actuators, and subsystems, to a controller using a...
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5410557 |
Method and apparatus for recognizing valid components in a digital signal
An apparatus for distinguishing a wanted signal in a binary signal sequence having both wanted signals and interference signals includes the step of generating a correction value which has a first...
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5249186 |
Apparatus for detecting the start of frame in bipolar transmission systems
Apparatus is provided to provide a start of frame signal for an incoming bipolar information signal wherein one binary state is alternately encoded with positive and negative level pulses, each of...
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5206863 |
Processor-to-processor communications protocol for a public service trunking system
A downlink between a communications dispatch console and a digitally trunked radio repeater system site controller efficiently transfers message data between the site controller and the console...
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5128930 |
Processor-to-processor communications protocol for a public service trunking system
A downlink between a communications dispatch console and a digitally trunked radio repeater system site controller efficiently transfers message data between the site controller and the console...
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5040195 |
Synchronization recovery circuit for recovering word synchronization
In a cellular-type communication system, a receiving apparatus of a mobile station which has received a forward control channel message recovers word synchronization of the received data. More...
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5023892 |
System for detecting and correcting signal distortion
A system is provided for detecting and correcting signal distortion in a received digital signal which comprises a series of pulses whose parameters are defined by transitions in the amplitude of...
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4768208 |
Mid-symbol sampling timing estimator
A timing error estimator which samples a received stream of data symbols at the beginning, end, and a mid-point of a symbol period is disclosed. These samples are used with a model that assumes...
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4675886 |
Frame synchronization device
Frame synchronization devices utilize a frame alignment word decoder connected to the outputs of a shift register which receives on its input the received data bit stream. It is clocked by a clock...
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4495621 |
Glitch detecting and measuring apparatus
A device for recognizing and measuring the lengths of glitches by sampling the input signal at fractions of a sampling clock, which clock has a period shorter than the period of pulses of the...
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4395773 |
Apparatus for identifying coded information without internal clock synchronization
A self-synchronized apparatus for recognizing identifying codes especially n missiles and spacecraft. The apparatus comprises a video quantizer for receiving bipolar video input signals and...
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4382298 |
Binary digit or bit restoration circuit
Relatively distorted bits are restored by sampling the bits for a plurality of times during each bit interval. A count of a first binary level of the samples is made for less than the bit interval,...
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4358846 |
Serial data correlator/code translator
A system for analyzing asynchronous signals containing bits of information for ensuring the validity of said signals by sampling each bit of information a plurality of times and feeding the sampled...
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4356566 |
Synchronizing signal detecting apparatus
A synchronizing signal detecting circuit for synchronizing digital data receiving equipment is disclosed. Digital signals consisting of data and synchronizing signals obtained by repeating a...
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4255813 |
Dicode transmission system
A dicode transmission system wherein a data is transmitted with the aid of an intermittent asynchronous system in the form of dicode signal. The disclosed system delivers a reset pulse from a...
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4240111 |
Vertical sync separator
A composite video signal is coupled to the input of a tapped delay line of a vertical sync separator. A detector determines the presence of the vertical sync signal profile within the sampled...
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4001775 |
Automatic bit synchronization method and apparatus for a logging-while-drilling receiver
In a system for logging while drilling, an uphole receiver demodulates a received acoustic signal to produce a synchronously rectified signal with a polarity representative of the phase state of...
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