Pulse ultra-wideband ranging system

Abstract

The invention relates to a pulse ultra-wideband ranging system, comprising a control circuit, a first signal generation circuit, a second signal generation circuit, an oscillator, a power amplifier, an antenna, a low noise amplifier, a detection circuit, a comparing circuit and a pulse stretching circuit. A controller controls the first signal generation circuit and the oscillator to generate an ultra wideband pulse signal which is amplified and transmitted through the antenna; after the ultra wideband pulse signal encounters a target, a refection signal is amplified through the low noise amplifier and an echo envelope signal is detected by the detection circuit, and the echo envelope signal generates an echo effective pulse after passing through the comparing circuit; the controller delays for a certain time and controls the second signal generation circuit and the echo effective pulse to generate a target effective pulse; and the target effective pulse is stretched to be a stretching signal by the pulse stretching circuit and the stretching signal is sent to the control circuit, and the control circuit judges whether the target is on the specified distance or not based on the condition whether the stretching signal exists or not. The invention simply solves the problems of generation, transmission and detection of the ultra wideband signal, and facilitates the mini-sized design.

Description

technical field [0001] The invention belongs to a radio ranging system, in particular to a pulse ultra-wideband ranging system for radio ranging. Background technique [0002] Modern high-tech has higher and higher requirements for ranging systems, especially for anti-jamming capabilities, detection accuracy, and non-cooperative target ranging. The traditional pulse radio ranging system cannot meet the needs of modern ranging because of its narrow instantaneous bandwidth, poor anti-interference ability, low detection accuracy, and large short-range blind zone. UWB technology is produced under this demand. [0003] It is generally considered that the fractional bandwidth of the signal , it is an ultra-wideband signal, where f H and f L are the highest and lowest frequencies of the signal band, respectively. It is difficult for a general signal to obtain a huge instantaneous bandwidth. For example, a chirp signal with a large time-width bandwidth product relies on the tim...

AI Technical Summary

Problems solved by technology

The main power of the transmitting signal frequency of the existing pulse ultra-wideband ranging system is concentrated below 1GHz. Due to the low frequency band of the signal, the structure of the transmitting antenna and the receiving antenna is complicated and the size is large, and the bandwidth of the receiver is relatively large. High-speed data is required. Analog-to-analog conversion circuit (digital-to-analog conversion rate greater than 500MHz), high implementation cost

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