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Impulse radar using variable pulse repetition frequency

A pulse and radar technology, applied in the field of radar systems, can solve problems such as the inoperability of monostatic radars

Pending Publication Date: 2021-03-05
NXP BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

however, monostatic radar cannot operate in both long-range and short-range modes, thus limiting its application

Method used

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  • Impulse radar using variable pulse repetition frequency
  • Impulse radar using variable pulse repetition frequency
  • Impulse radar using variable pulse repetition frequency

Examples

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Embodiment Construction

[0043] Embodiments described herein implement a pulsed radar system that operates alternately in long range (eg, gated mode) and short range (eg, non-gated mode). In long-range mode, receiver blindness is supported for higher available signal-to-noise ratios (SNR). In short-range mode, the receiver detects target reflections or retransmissions that overlap with the direct feedthrough signal from the monostatic transmitter to the receiver. Thus, the pulsed (eg, impulse) radar systems described herein provide cost-competitive detection of short- and long-range targets, as well as a dynamic means for tuning the radar system's mode of operation based on combinations of target characteristics.

[0044] figure 1 An example embodiment 10 of an RF ranging system is shown in which a target retransmits a waveform received from a radar. It should be appreciated that the teachings of the present disclosure are applicable to both monostatic radars having collocated transmitters and recei...

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PUM

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Abstract

The invention relates to an impulse radar using variable pulse repetition frequency. An apparatus including a transmitter including a pulsed Radio Frequency (RF) source coupled to an antenna. A receiver includes an amplifier coupled to the antenna. A controller is configured to adjust one or more durations of a ranging cycle of the apparatus, wherein the ranging cycle includes a first duration ofa gated mode and a second duration of a non-gated mode. The gated mode blinds the amplifier during a transmission of the transmitter. The non-gated mode reduces a gain of the amplifier during the transmission.

Description

technical field [0001] The present disclosure relates generally to radar systems, and more particularly, to an impulse radar with long-range and short-range detection capabilities. Background technique [0002] RF ranging systems use the time-of-flight (TOF) principle to determine the distance between a transmitter and a target. Typically, a transmitter emits a waveform towards a target. The waveform is then reflected or retransmitted by the target towards the receiver. The duration of the reflection or retransmission to reach the receiver determines the distance between the transmitter and the target. [0003] Examples of targets include distant targets with relatively low reflectivity and nearby targets that reflect stronger signals toward the receiver. Monostatic radars combine transmitter and receiver antennas to reduce the cost of RF ranging systems. However, monostatic radar cannot operate in both long-range and short-range modes, thus limiting its application. C...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/16G01S7/34G01S7/03
CPCG01S13/16G01S7/34G01S7/03G01S13/931G01S7/292G01S7/282G01S13/12G01S13/76
Inventor 梁豪松何新
Owner NXP BV