Abstract:
레이더 시스템의 빔 중심각도 보정방법에 관한 것으로, (a) 레이더 시스템의 송수신부에서 주변으로 레이더 신호를 송신하고, 표적에서 반사되는 신호를 수신하는 단계, (b) 제어부에서 수신된 레이더 신호를 이용해서 레이더 검지정보를 검출하는 단계, (c) 상기 레이더 검지정보를 이용해서 복수의 고정 표적을 선택하는 단계 및 (d) 상기 (c)단계에서 선택된 복수의 고정 표적의 분포값 평균 또는 분산을 이용해서 안테나의 빔 중심각도 오차를 보정하는 단계를 포함하는 구성을 마련하여, 레이더 시스템 장착시 안테나의 빔 중심각도를 미세하게 보정하고, 주행 중 진동이나 충격으로 인해 오차가 발생한 빔 중심각도를 정밀하게 보정할 수 있다.
Abstract:
An apparatus and method for enhanced calibration of radar at the module level supports dual polarization and array calibration and alignment without the use of external test equipment. Utilizing a delay line, loop back capability at the module level allows existing receiver exciter subsystem to be used for calibration. This approach eliminates the need for manual array calibration using external RF monitor subsystem or external test antennas.
Abstract:
L'invention concerne un procédé de mesure du temps de propagation d'une onde entre deux dispositifs (101, 200) comportant au moins les étapes suivantes : - génération et mémorisation dans le dispositif d'un train d'ondes de référence (TOR), - émission d'un premier train d' ondes, - réception dans ledit dispositif dudit premier train d'ondes après au moins un premier parcours donnant lieu au temps de propagation (TPI, TP2) à mesurer, - émission d'au moins un deuxième train d'ondes, - réception dans ledit dispositif dudit au moins un deuxième train d'ondes après un deuxième parcours comportant au moins un retard introduit par ledit ensemble formant parcours de substitution, - calcul du temps de propagation entre lesdits deux dispositifs par combinaison des retards des premier et deuxième trains d'onde par rapport à l'onde de référence.
Abstract:
A pulsed radar method of sensing or measuring a product material in a storage tank. A plurality of waveform types are automatically selected based on a power limitation. The pulsed radar signal is transmitted by a programmable transmitter (190) to the product material, wherein the pulsed radar signal is reflected or scattered by the product material to provide a radar signal during an interval of time including a target signal. An initial gain or attenuation is automatically set for a programmable receiver (150). The programmable receiver receives the radar signal including the target signal during the interval of time, and the target signal is signal processed using a lower attenuation setting as compared to the initial gain or attenuation to determine at least one parameter associated with the product material. The transmitted and received radar signal can also be adjusted according to the measured SNR.
Abstract:
Various techniques may be implemented to isolate a receive signal from a transmit signal in an antenna. Signal isolation is desirable because it prevents interference of the signals with one another and minimizes signal noise, which reduces the signal quality. Some of the techniques are symmetry of at least two receive channels with regards to a transmit channel, using differential signals within the antenna, designing receive channel inputs to be orthogonal to a transmit channel, and designing a voltage controlled oscillator to be on the same substrate as the tuning circuitry of the voltage controlled oscillator.
Abstract:
Various techniques may be implemented to isolate a receive signal from a transmit signal in an antenna. Signal isolation is desirable because it prevents interference of the signals with one another and minimizes signal noise, which reduces the signal quality. Some of the techniques are symmetry of at least two receive channels with regards to a transmit channel, using differential signals within the antenna, designing receive channel inputs to be orthogonal to a transmit channel, and designing a voltage controlled oscillator to be on the same substrate as the tuning circuitry of the voltage controlled oscillator.
Abstract:
Es wird ein Radarsystem zur Umfelderfassung angegeben, bei dem die Frequenz der Sendeleistung durch entsprechende Ansteuerung eines Oszillators moduliert und der Oszillator mit einen Satz diskreter Steuersignalwerte angesteuert wird. Das Radarsystem ist derart ausgelegt, dass zumindest für einen Teil dieser diskreten Steuersignalwerte die Frequenz des Oszillators vermessen wird. Die Frequenzvermessung umfasst eine Abtastung des Oszillator-Signals oder eines durch Frequenzteilung daraus gewonnenen Signals und eine Frequenzbestimmung des abgetasteten Signals durch eine Spektralanalyse.