Patent•
Radar signal real-time detection method
26 Nov 2019-
TL;DR: In this article, the authors proposed a radar signal real-time detection method, which is characterized by comparing an average amplitude of N sampling points before a certain moment with the amplitude of the sampling point at the moment.
Abstract: The invention relates to a radar signal real-time detection method. The method is characterized by comparing an average amplitude of N sampling points before a certain moment with the amplitude of thesampling point at the moment, and if the amplitudes of the plurality of sampling points after starting of the certain moment are continuously a certain value higher than the average amplitude in a previous certain period of time, considering that a signal rising edge exists at the moment; otherwise, if the amplitudes of the plurality of continuous sampling points after a certain moment is startedare a certain value lower than the previous average amplitude, considering that a falling edge exists at the moment; and when both the falling edge and the rising edge exist, intercepting a signal part existing in data immediately. Whether a signal exists is detected in a mode of judging the rising edge and the falling edge in a time domain, and an effect of detecting the signal in real time under a passive condition can be achieved by setting reasonable parameters and thresholds.
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Patent•
10 Oct 1991TL;DR: In this article, a system and method that uses a digital oscilloscope to digitize a waveform and then loads the digitized waveform into a computer is described, where the computer scans the waveform data locating leading edges by comparing data to a rolling average and a noise threshold and locating tops and bottoms if the pulse is a negative going pulse by compared data to slope criteria until a trailing edge is discovered.
Abstract: The invention is a system and method that uses a digital oscilloscope to digitize a waveform and then loads the digitized waveform into a computer. The computer scans the waveform data locating leading edges by comparing data to a rolling average and a noise threshold and locating tops and bottoms if the pulse is a negative going pulse by comparing data to slope criteria until a trailing edge is discovered. The trailing edge defines the end of the pulse, the immediately preceding leading edge defines the beginning of the pulse and the pulse height and this allows the pulse characteristics to be determined. This discovered pulse is removed from the waveform by setting all data values in the pulse to the pulse baseline value, and the scan for leading edges, pulse tops and a trailing edge is performed again to isolate and characterize another pulse. This cycle of detection, analysis and removal continues until the end of data is encountered before a pulse is discovered.
33 citations
Patent•
18 Dec 2009TL;DR: In this article, a transmitter has transmitted interrogations to aircraft airborne in a coverage, a receiver has received signals transmitted from aircraft in the coverage, reply analyzers 132 b and 133 b analyze a reply responding to an interrogation transmitted from the transmitter, as the reply is detected from signals received by the receiver, and a squitter analyzer 132 d analyzes an extended squitter.
Abstract: A transmitter 122 transmits interrogations to aircraft airborne in a coverage, a receiver 123 receives signals transmitted from aircraft airborne in the coverage, reply analyzers 132 b and 133 b analyze a reply responding to an interrogation transmitted from the transmitter, as the reply is detected from signals received by the receiver, and a squitter analyzer 132 d analyzes an extended squitter, as the extended squitter is detected from the signals received by the receiver.
8 citations
Patent•
22 Feb 2017
TL;DR: In this paper, a pulse signal detection system, comprising a preprocessing unit, a threshold detection and a condition screening unit, is presented. But the system is not suitable for the detection of pulse signals with specified power and time characteristic conditions.
Abstract: The invention provides a pulse signal detection system, comprising a preprocessing unit, a threshold detection and a condition screening unit; the signal processing unit comprises an envelope detection module, a signal-noise ratio estimation module and a smoothing filter module, the threshold detection unit comprises a threshold calculation module and an edge detection module, the condition screening unit comprises a noise burring module, an amplitude gap elimination module, a power condition screening module and a time condition screening module The pulse signal detection system and method designed herein provide various threshold types, allow pulse signals to be detected quickly and accurately, and allow the pulse signals with specified power and time characteristic conditions to be screened and detected
8 citations
Patent•
11 Feb 2013TL;DR: In this article, an analog front end is configured to receive an input signal from a power line, and a demodulator module is used to demodulate the input signal.
Abstract: A receiver for a power line communication (PLC) device includes an analog front end configured to receive an input signal from a power line. The input signal includes symbols and wherein each of the symbols includes samples. A demodulator module is configured to demodulate the input signal to generate a demodulated signal. The demodulator module includes an impulse noise module configured to detect and remove impulse noise in the symbols of the input signal.
4 citations
14 May 2018
TL;DR: A laser rangefinder device based on pulsed time-of-flight (TOF) distance measurement techniques was constructed and tested and is capable of measuring the time position, rise time and pulse width of incoming optical pulses with ps precision in the amplitude range of more than 1: 50 000.
Abstract: A laser rangefinder device based on pulsed time-of-flight (TOF) distance measurement techniques was constructed and tested. Key blocks of the system are the integrated receiver channel and the integrated time-to-digital converter (TDC) fabricated in a 0.35-um CMOS technology. The receiver-TDC chip set is capable of measuring the time position, rise time and pulse width of incoming optical pulses with ps precision in the amplitude range of more than 1: 50 000. The timing detection is based on leading edge detection in the receiver channel, and the amplitude-dependent timing error is compensated for by utilizing the multichannel TDC. A measurement distance of 100 m is achieved to a target with a reflectance of about 10% at the signal level of SNR = 6, with an optical output power and receiver aperture of 12 W and 18 mm, respectively.
4 citations