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6925294 |
Antenna receiver in which carrier-to-noise ratio of demodulation signal is improved
An antenna receiver includes a plurality of mixers for frequency-converting signals received by a plurality of antennas into intermediate-frequency signals; a plurality of local oscillators, which...
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6822433 |
Gain and phase detector having dual logarithmic amplifiers
A gain-phase detector differentially processes the outputs from two logarithmic amplifiers to provide ratiometric gain measurement, thereby eliminating intercept as a parameter. Hard-limited...
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EP1274181B1 |
Multiantennae receiver for improving the carrier-to-noise ratio by adapting the phases of the antenna signals
Abstract of EP1274181 An antenna receiver includes a plurality of mixers (7,8,9) for frequency-converting signals received by a plurality of antennas (1,2,3) into intermediate-frequency signals; a...
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EP1274181A1 |
Multiantennae receiver for improving the carrier-to-noise ratio by adapting the phases of the antenna signals
An antenna receiver includes a plurality of mixers (7,8,9) for frequency-converting signals received by a plurality of antennas (1,2,3) into intermediate-frequency signals; a plurality of local...
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6336032 |
Method and device for phase regulation
The phase of a transmitted signal is regulated in a device which is part of a system for electromagnetic signal transmission. The transmitted signal has periods when it contains information and...
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6249249 |
Active array antenna system
An active array antenna system comprises a plurality of element antennas and radio frequency circuits connected to the element antennas. The radio frequency circuits comprises first frequency...
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6208833 |
Echo cancellation for a broadband distribution system
A wideband signal distribution unit for receiving a plurality of inputs and having a plurality of outputs is provided. The distribution unit features a first combiner having an output and being...
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5668839 |
IF signal combiner for minimizing the BER in a space or angle diversity digital radio receiver
A mixed combination strategy combiner for receivers operating in high capacity digital radio links and protected with space or angle diversity is described. The combiner comprises a system which...
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5095543 |
Method and device for audio waveform correction in a RF communication system postdetection circuit
A method and device are set forth for providing an improved audio waveform correction in a postdetection circuit in a radio frequency communication system. A device is described that utilizes at...
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4956853 |
Method of servo-controlling the instant of regeneration in a digital transmission in which a carrier is modulated along two axes in quadrature, and apparatus for implementing the method
A method of servo-controlling the instant of regeneration in a digital transmission in which a carrier is modulated along two axes in quadrature, in which the optimum instant of regeneration is...
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4797950 |
Multipath reduction system
The effects of multipath and other interference signals in communication receivers are reduced by implementing an adaptive array. The invention addresses a signal environment in which the...
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4710975 |
Space diversity reception system having compensation means of multipath effect
A space diversity reception system which minimizes the inband amplitude and/or phase dispersion by controlling the phase shifter is described. According to the present invention, the interference...
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4528697 |
Broadband quadrature phase modulator for control loop error generation in an IF combiner
Circuitry for use in an IF combiner, where main and diversity receiver path signals are combined. The circuitry generates an error signal for the purpose of controlling the phase of one of these...
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4512034 |
Technique for digital radio space diversity combining
The present invention relates to a space diversity combiner which includes two branches wherein separate multipath signals received from a remote source are propagated. The branch signals are...
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4466134 |
Intermediate frequency slope compensation control arrangements
In a microwave digital radio transmission system receiver in which a modulated carrier wave is converted to an I.F. signal which is demodulated to produce phase quadrature signals, an apparent...
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EP0092907A1 |
Intermediate frequency slope compensation control arrangements.
In a microwave digital radio transmission system receiver in which a modulated carrier wave is converted to an I.F. signal (1) which is demodulated (11-17) to produce phase quadrature signals (I,...
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4354276 |
Equalizing signal combiner
In a space diversity receiver, the relative phase of the two received signals is varied in manner to minimize amplitude dispersion in the combined signal. A phase control signal is derived from the...
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4330764 |
Multipath fade equalizer
An adaptive multipath fade equalizer is disclosed comprising differencing means (24) for forming a difference between an input equal to said equalizer and a component of the equalizer output signal...
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