An ultra-wideband narrow pulse detection and analog forwarding system and method

Abstract

The present invention provides an ultra-wideband narrow pulse detection and analog forwarding system and method, belonging to the field of ultra-wideband narrow pulse technology. The system includes: an ultra-wideband microstrip antenna, an ultra-wideband pulse detection circuit, a radio frequency front end and sampling circuit, a time series measurement circuit, a signal processing and control circuit, a dynamic delay control circuit, and an ultra-wideband pulse generation circuit. The ultra-wideband impulse signal transmission signal waveform and sequence are obtained by receiving the ultra-wideband impulse signal, timing measurement, radio frequency sampling, and signal processing, and then the ultra-wideband impulse signal is forwarded through dynamic delay to achieve ultra-wideband signal regeneration. The present invention solves the problem that the current battlefield reconnaissance equipment and test equipment cannot effectively detect the ultra-wideband impulse signal, and has the advantages of high accuracy and efficiency of sequence estimation.

Description

Technical Field

[0001] The invention relates to the field of ultra-wideband narrow pulse detection and simulation technology, and in particular to an ultra-wideband narrow pulse detection and simulation forwarding system and method. Background Art

[0002] Ultra Wide Band (UWB) technology is a new type of wireless communication technology that directly modulates impulse pulses with very steep rise and fall times to give the signal a bandwidth of GHz.

[0003] Ultra-wideband radio signals mainly include carrier-free ultra-wideband impulse radio signals, which are the signal forms used by ultra-wideband impulse radars and ultra-wideband impulse fuzes. The main characteristics of ultra-wideband impulse radio signals are carrier-free modulation, extremely short pulse duration, extremely wide signal spectrum range, and low power spectrum density. Radars, proximity fuzes and other radio equipment working in the ultra-wideband impulse signal system have the characteristics of high ranging accuracy, good signal concealment, and strong anti-interference ability. They have been gradually widely studied and related products have been formed and applied on the battlefield.

[0004] The emergence of ultra-wideband equipment and its application in the battlefield have brought higher challenges to radio reconnaissance equipment, interference countermeasure equipment, etc. in the battlefield. The radio reconnaissance equipment and interference countermeasure equipment currently used mainly detect and receive radio signals in the frequency domain for radio signals modulated by carrier waves, and forward simulated target echo signals to achieve deceptive interference to radio equipment. However, such equipment is no longer suitable for ultra-wideband impulse signals with extremely short duration and extremely low spectrum density. At the same time, since the random pulse position modulation of ultra-wideband impulse signals improves anti-interference performance, it is more difficult for radio reconnaissance equipment to detect them when prior knowledge such as their pulse position modulation sequence is unknown (detection without prior knowledge is called blind detection or blind detection). With the increase in various application scenarios of ultra-wideband radio equipment, higher requirements are also put forward for signal testing, target simulation and other means used in its development process. At present, simple target simulators are mainly used to implement ultra-wideband radio equipment testing. Such simulators need to predict the time sequence of ultra-wideband signals in advance (non-blind detection), and the simulation test range and test scenarios are greatly limited. Summary of the invention

[0005] The technical problem solved by the present invention is that current battlefield reconnaissance equipment and test equipment are unable to effectively detect and receive ultra-wideband impulse signals.

[0006] To solve the above problems, the technical solution of the present invention is as follows:

[0007] An ultra-wideband narrow pulse detection and analog forwarding system, comprising:

[0008] Ultra-wideband microstrip antenna, ultra-wideband microstrip antenna is used to receive ultra-wideband impulse signal, ultra-wideband impulse signal is the detection signal,

[0009] The ultra-wideband pulse detection circuit receives the output signal of the ultra-wideband microstrip antenna.

[0010] The RF front end and sampling circuit receive the output signal of the ultra-wideband pulse detection circuit.

[0011] The time series measurement circuit receives the output signal of the ultra-wideband pulse detection circuit.

[0012] The signal processing and control circuit communicates bidirectionally with the time series measurement circuit. The signal processing and control circuit also receives the output signal of the RF front end and the sampling circuit.

[0013] A dynamic delay control circuit receives an output signal of the signal processing and control circuit.

[0014] The ultra-wideband pulse generating circuit is used for forwarding the ultra-wideband impulse signal, and the ultra-wideband pulse generating circuit receives the output signal of the dynamic delay control circuit.

[0015] Furthermore, the ultra-wideband microstrip antenna adopts an ultra-wideband non-frequency-variant design to achieve optimal matching for an ultra-wideband impulse signal.

[0016] Furthermore, the ultra-wideband pulse detection circuit is composed of: a radio frequency filter, a first low-noise amplifier, and a pulse leading edge detector which are electrically connected in sequence; the input end of the radio frequency filter is matched and connected to the ultra-wideband microstrip antenna through a radio frequency connector; and the output end of the radio frequency filter is connected to the time series measurement circuit.

[0017] In the above ultra-wideband pulse detection circuit, the input end of the radio frequency filter is matched and connected with the ultra-wideband microstrip antenna through a radio frequency connector.

[0018] Furthermore, a ps-level time delay measurement chip is provided in the time series measurement circuit. The ps-level time delay measurement chip measures the arrival time of the input signal in real time, and converts the signal arrival time into a digital quantity and outputs it to the signal processing and control circuit.

[0019] In the above time series measurement circuit, the ps level means that the delay step is no greater than 10 ps.

[0020] Furthermore, the dynamic delay control circuit is composed of: a primary programmable delay circuit, a secondary programmable delay circuit, and a digital clock circuit which are electrically connected in sequence.

[0021] The above dynamic delay control circuit uses a large-range first-level programmable delay circuit and a high-precision second-level programmable delay circuit to achieve delay control.

[0022] Further, using digital clock counting to achieve 10 -9 s to 10 -6 s-level delay control, using the first-level programmable delay circuit and the second-level programmable delay circuit to achieve 10 -12 S-level delay control and delay agility control.

[0023] Furthermore, the ultra-wideband pulse generating circuit is composed of: a Gaussian pulse generating circuit, a radio frequency switching circuit and a filtering shaping array circuit which are electrically connected in sequence.

[0024] The ultra-wideband pulse generating circuit can selectively output ultra-wideband echo signals with various waveforms.

[0025] Furthermore, the RF front end and sampling circuit is composed of: a second low noise amplifier, an anti-aliasing filter and a high-speed ADC circuit which are electrically connected in sequence.

[0026] In the above-mentioned RF front end and sampling circuit, the high-speed ADC circuit, i.e., the analog-to-digital conversion circuit, has a sampling rate of 10GSPS.

[0027] The RF front end and sampling circuit amplify the ultra-wideband signal output by the ultra-wideband microstrip antenna and then perform RF direct sampling. The sampled signal is output to the signal processing and control circuit through a high-speed data interface.

[0028] Furthermore, the logic module of the signal processing and control circuit is composed of the following modules which are electrically connected in sequence: a clock control module, a timing measurement module, a timing position matching module, a delay control module and a dynamic intersection timing control module.

[0029] In the above signal processing and control circuit, the main function of the clock control module is to configure the clock according to the system working requirements and provide input clock for the timing measurement module.

[0030] In the above signal processing and control circuit, the main function of the timing measurement module is to perform timing measurement on the input signal with the assistance of the signal processing module, and output the measurement result to the timing position matching module.

[0031] In the above signal processing and control circuit, the timing position matching comprehensively applies the time series signal and the sampling signal, removes the invalid time series signal according to the sampling signal, and uses multi-channel parallel correlation calculation to improve the efficiency of timing position matching.

[0032] In the above signal processing and control circuit, the delay control module mainly functions to modulate the output clock sequence according to the information fed back by the signal processing module, and output the modulated clock signal to the ultra-wideband pulse generating circuit.

[0033] In the above signal processing and control circuit, the dynamic rendezvous timing control module is built with: a configurable clock used as a target motion stepping reference, and a target motion model for simulating target distance and speed during dynamic rendezvous is realized through the configurable clock.

[0034] Furthermore, the resolution of the target motion model is less than 0.01 meters.

[0035] The present invention also provides an ultra-wideband narrow pulse detection and analog forwarding method. Based on the above-mentioned ultra-wideband narrow pulse detection and analog forwarding system, the ultra-wideband impulse signal transmission signal waveform and sequence are obtained by receiving the ultra-wideband impulse signal, measuring the time series, sampling the radio frequency, and processing the signal. The ultra-wideband impulse signal is forwarded by dynamic delay to achieve ultra-wideband signal regeneration.

[0036] Preferably, an ultra-wideband narrow pulse detection and analog forwarding method comprises the following steps:

[0037] S1. The ultra-wideband microstrip antenna receives the ultra-wideband impulse signal, which is the detection signal;

[0038] S2, the ultra-wideband pulse detection circuit processes the detection signal to obtain the detection clock signal:

[0039] The ultra-wideband microstrip antenna outputs the received detection signal to the ultra-wideband pulse detection circuit, which first forwards the detection signal to the radio frequency front end and sampling circuit, and then processes the detection signal through the radio frequency filter, the first low noise amplifier, and the pulse leading edge detector in sequence to obtain a detection clock signal, and finally outputs the detection clock signal to the time series measurement circuit;

[0040] S3, the time series measurement circuit processes the detection clock signal to obtain the time series signal:

[0041] The time series measurement circuit receives the detection clock signal output by the ultra-wideband pulse detection circuit and the control signal output by the signal processing and control circuit. Under the control of the control signal, the time series measurement circuit realizes continuous measurement of the time intervals between adjacent pulses of the detection clock signal, and outputs the measured time series signal to the signal processing and control circuit.

[0042] S4, the RF front end and sampling circuit process the received signal to obtain the sampling signal:

[0043] The RF front end and sampling circuit receives the detection signal forwarded by the ultra-wideband pulse detection circuit, processes the detection signal in sequence through the second low-noise amplifier, the anti-aliasing filter and the high-speed ADC circuit to obtain a sampling signal, implements direct RF sampling after amplifying the ultra-wideband signal, and finally outputs the sampling signal to the signal processing and control circuit;

[0044] S5, the signal processing and control circuit processes the time series signal and the sampling signal to obtain the waveform and sequence of the detection signal:

[0045] The signal processing and control circuit receives the time series signal output by the ultra-wideband pulse detection circuit and the sampling signal output by the frequency front end and the sampling circuit, and sequentially passes the time series signal and the sampling signal through the clock control module, the timing measurement module, the timing position matching module, the delay control module, and the dynamic rendezvous timing control module to simulate the target distance and speed during the dynamic rendezvous, obtains the transmission signal waveform and sequence of the detection signal, and outputs the detection signal waveform and sequence to the dynamic delay control circuit;

[0046] S6. The dynamic delay control circuit processes the detected signal waveform and sequence to obtain a regenerated ultra-wideband impulse signal:

[0047] The dynamic delay control circuit receives the detection signal waveform and sequence output by the signal processing and control circuit, and sequentially passes the detection signal waveform and sequence through the first-level programmable delay circuit, the second-level programmable delay circuit, and the digital clock circuit to obtain a regenerated ultra-wideband impulse signal after delay control;

[0048] S7, the ultra-wideband pulse generation circuit processes the regenerated ultra-wideband impulse signal to realize the forwarding of the detection signal and the simulation of the target echo:

[0049] The ultra-wideband pulse generating circuit receives the regenerated ultra-wideband impulse signal output by the dynamic delay control circuit, and sequentially passes the regenerated ultra-wideband impulse signal through the Gaussian pulse generating circuit, the RF switching circuit and the filtering shaping array circuit, and outputs ultra-wideband echo signals with various waveforms, thereby realizing the forwarding of the detection and receiving signals and the simulation of the target echo.

[0050] The beneficial effects of the present invention are:

[0051] (1) The present invention fills the gap in blind detection / reception of ultra-wideband impulse signals at home and abroad. The method can perform blind detection on the detected signal without obtaining the modulation information of the detected signal, thereby greatly improving the detection sensitivity and broadening the application scope of the detection equipment;

[0052] (2) The present invention uses a high-speed ADC circuit (high-speed analog-to-digital conversion circuit) to perform time-domain sampling on the signal to obtain an accurate time-domain waveform, and analyzes whether the received signal meets the requirements through waveform characteristics, thereby improving the accuracy and efficiency of the received signal sequence estimation;

[0053] (3) The present invention uses the internal periodic clock of the signal processing and control circuit to realize large-scale cross-cycle timing control, avoiding the dependence on a large-scale delay device and reducing the system implementation cost;

[0054] (4) The present invention uses a large-range high-dynamic precision delay circuit to achieve accurate reconstruction of the ultra-wideband impulse signal pulse sequence, which can realize the echo signal forwarding delay control, thereby simulating the target echo distance information;

[0055] (5) The present invention uses software logic to accurately control the timing of the forwarded signal to simulate the relative motion between the projectile and the target, thereby simulating the target echo velocity information;

[0056] (6) The present invention has a wide range of applications. It can be used for battlefield ultra-wideband radio signal detection and interference countermeasures, solving the problem of the current lack of ultra-wideband fuze interference means. It can also be used for laboratory ultra-wideband radar or ultra-wideband fuze target echo simulation, solving the problem of backward ultra-wideband fuze testing methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Figure 1 This is an architecture diagram of an ultra-wideband narrow pulse detection and analog forwarding system in Example 1;

[0058] Figure 2 is a structural block diagram of a signal processing and control circuit in Example 1;

[0059] Figure 3 This is a circuit block diagram of an ultra-wideband narrow pulse detection and analog forwarding system specifically implemented in Example 1;

[0060] Figure 4 is a structural block diagram of a dynamic delay control circuit in Embodiment 1;

[0061] Figure 5 is a block diagram of the ultra-wideband pulse generating circuit structure of Example 1;

[0062] Figure 6 This is a flow chart of an ultra-wideband narrow pulse detection and analog forwarding method according to Embodiment 2;

[0063] Among them, 1-ultra-wideband microstrip antenna, 2-ultra-wideband pulse detection circuit, 3-time series measurement circuit, 4-dynamic delay control circuit, 5-ultra-wideband pulse generation circuit, 6-RF front-end and sampling circuit, 7-signal processing and control circuit. DETAILED DESCRIPTION

[0064] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0065] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms "a", "said" and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings, and "multiple" generally includes at least two.

[0066] Example 1

[0067] This embodiment is an ultra-wideband narrow pulse detection and analog forwarding system. Figure 1 As shown, including:

[0068] The ultra-wideband microstrip antenna 1 is used to receive an ultra-wideband impulse signal, which is a detection signal.

[0069] The ultra-wideband microstrip antenna 1 of this embodiment adopts an ultra-wideband non-frequency-variable design, specifically: a Vivaldi antenna, with an operating bandwidth of 1 GHz to 5 GHz, a main lobe width of not less than 60°, a gain of not less than 7 dBi, and an output impedance of 50 ohms.

[0070] The ultra-wideband pulse detection circuit 2 receives the output signal of the ultra-wideband microstrip antenna 1. The ultra-wideband pulse detection circuit 2 is composed of a radio frequency filter, a first low noise amplifier, and a pulse front detector which are electrically connected in sequence. The input end of the radio frequency filter is matched and connected with the ultra-wideband microstrip antenna 1 through a radio frequency connector.

[0071] In this embodiment, Figure 3 As shown, the RF filter has an operating bandwidth of 1GHz to 5GHz, an insertion loss of less than 1.5dB, a first low noise amplifier has an operating bandwidth of 1GHz to 6GHz, an in-band gain of not less than 18dB, a noise figure of less than 2dB, and a pulse leading edge detector including: an energy detector and a level converter. The energy detector uses a Schottky diode, and the level converter converts the high-speed analog signal to the digital signal level and outputs a TTL level.

[0072] The RF front end and sampling circuit 6 receives the output signal of the ultra-wideband pulse detection circuit 2. The RF front end and sampling circuit 6 is composed of: a second low noise amplifier, an anti-aliasing filter and a high-speed ADC circuit which are electrically connected in sequence.

[0073] In this embodiment, Figure 3 As shown, the signal output by the ultra-wideband microstrip antenna 1 is amplified by the RF front-end and sampling circuit 6 using a second low-noise amplifier (working bandwidth 1GHz~6GHz, in-band gain not less than 18dB, noise figure less than 2dB), and then passed through an anti-aliasing filter (1GHz~5GHz). Then, a high-speed ADC chip (i.e., high-speed ADC circuit) with a sampling rate of 10GSPS is used for direct RF sampling, and the sampled signal is sent to the signal processing and control circuit 7 through the high-speed JESD204B interface.

[0074] The time series measurement circuit 3 receives the output signal of the ultra-wideband pulse detection circuit 2. A ps-level time delay measurement chip is provided in the time series measurement circuit 3. The ps-level time delay measurement chip measures the arrival time of the input signal in real time, and converts the signal arrival time into a digital quantity and outputs it to the signal processing and control circuit.

[0075] In this embodiment, Figure 3 As shown, the time series measurement circuit 3 generates a reference clock (clock frequency 10MHz) by a high-precision crystal oscillator, which is provided to the time-to-digital conversion chip (i.e., ps-level time delay measurement chip) for high-precision time series measurement. Under the control of the FPGA (i.e., the signal processing and control circuit 7), the time-to-digital conversion chip realizes continuous and accurate measurement of the time intervals between adjacent pulses of the detection clock signal, and sends the measurement results to the FPGA (i.e., the signal processing and control circuit 7) for processing. The operating voltage of the conversion chip is 1.8V to 3.3V, and the control communication port is SPI. The conversion chip works in high-resolution mode and can achieve a measurement accuracy of 10ps; at this time, the offset error is 200ps, and the conversion delay time is 80ns to 100ns; at this time, the maximum frequency of the reference clock is 10MHz, the minimum pulse width of the measured signal is 10ns (CMOS), and the minimum pulse interval is 100ns. It can be applied to the test of ultra-wideband signals with pulse repetition frequency below 10MHz.

[0076] The signal processing and control circuit 7 communicates bidirectionally with the time series measurement circuit 3, and the signal processing and control circuit 7 also receives the output signal of the RF front end and the sampling circuit 6. Figure 2 As shown, the logic module of the signal processing and control circuit 7 is composed of a clock control module, a timing measurement module, a timing position matching module, a delay control module and a dynamic intersection timing control module which are electrically connected in sequence. The clock control module outputs the output value to the timing measurement module, the timing measurement module outputs the output value to the timing position matching module, the timing position matching module outputs the output value to the delay control module, and the delay control module outputs the output value to the dynamic intersection timing control module.

[0077] The timing position matching comprehensively applies the time series signal and the sampling signal, eliminates the invalid time series signal according to the sampling signal, and uses multi-channel parallel correlation calculation to improve the efficiency of timing position matching.

[0078] The dynamic rendezvous timing control module has a built-in configurable clock used as a stepping reference for target motion, and a target motion model for simulating target distance and speed during dynamic rendezvous is realized through the configurable clock.

[0079] In this embodiment, Figure 3 As shown, the signal processing and control circuit 7 is composed of a high-speed FPGA with a built-in DSP processor. The FPGA adopts the Zynq series chip of Xilinx Company, has a resource of 100K basic logic units, an input clock frequency of 100MHz, and an internal logic clock of 600MHz.

[0080] The dynamic delay control circuit 4 receives the output signal of the signal processing and control circuit 7. The dynamic delay control circuit 4 is composed of: a primary programmable delay circuit, a secondary programmable delay circuit, and a digital clock circuit which are electrically connected in sequence.

[0081] The time control resolution of the first-level programmable delay circuit is ≯5ns, and the jitter is no more than 10ps. The second-level programmable delay circuit realizes fine-grained delay time control with a time control resolution of 10ps and a control range of no less than 10ns.

[0082] In this embodiment, the specific implementation circuit composition of the dynamic delay control circuit 4 is shown in Figure 4 , consisting of a high-speed programmable counter chip, an analog switch, and a high-precision programmable chip. The high-speed programmable counter chip (i.e., the first-level programmable delay circuit) realizes long-period time control of the transmitted signal, with a time control resolution of ≯5ns and a jitter of no more than 10ps; the high-precision programmable delay chip (i.e., the second-level programmable delay circuit) realizes fine-grained delay time control with a time control resolution of 10ps and a control range of no less than 10ns; the analog switch (i.e., the digital clock circuit) can choose whether to use long-period delay control to minimize the time control blind spot. High-precision, wide-range delay time dynamic control can simulate the continuous change process of the delay time during high-speed projectile-target rendezvous. The long-period delay control circuit predicts the echo time of the i-th pulse by receiving the i-1th pulse. Its implementation only requires T0+(δ i -δ i-1 )-T D0 The delay of the fixed delay can eliminate the influence of the fixed delay. Where T0 is the average pulse period of the received signal, T D0 is the working clock of the programmable counter, {δ i} is the pulse modulation sequence of the detected signal. Assume that the typical value T0 = 125ns, δ i -δ i-1 Typical value 0.5ns, T D0 The typical value is 32.2ns, so a delay of 92.3ns is required. The advantage of this method is that the delay control time is short, but the disadvantage is that it is necessary to obtain the delay modulation sequence {δ i}, and locate and synchronize the delay sequence of the current transmitted pulse in the position of the entire sequence.

[0083] The ultra-wideband pulse generating circuit 5 is used to forward the ultra-wideband impulse signal, and the ultra-wideband pulse generating circuit 5 receives the output signal of the dynamic delay control circuit 4. The ultra-wideband pulse generating circuit 5 is composed of a Gaussian pulse generating circuit, a radio frequency switching circuit and a filter shaping array circuit which are electrically connected in sequence.

[0084] In this embodiment, the ultra-wideband pulse generating circuit 5 is specifically implemented as shown in FIG. Figure 5 , which consists of a step recovery diode pulse generating circuit, a Schottky diode shaping circuit, an RF amplifier (working bandwidth 1GHz~5GHz, gain 30dB), a programmable attenuator (working bandwidth 1GHz~5GHz, attenuation control range 0dB~31dB), an RF filter group (divided into 1GHz~2GHz, 2GHz~3GHz, 3GHz~4GHz, 4GHz~5GHz according to the frequency band), and an RF switch array. The RF filter is designed according to the signal frequency band and has the function of signal shaping and transformation; the RF switch array selects different filter output signals according to the waveform selection command, thereby realizing the forwarding of the detection signal and the simulation of the target echo.

[0085] Example 2

[0086] This embodiment is an ultra-wideband narrow pulse detection and analog forwarding method, which is based on an ultra-wideband narrow pulse detection and analog forwarding system in Embodiment 1.

[0087] This embodiment obtains the waveform and sequence of the transmitted signal of the ultra-wideband impulse signal by receiving the ultra-wideband impulse signal, measuring the time series, sampling the radio frequency, and processing the signal, and regenerates the ultra-wideband signal by dynamically delaying and forwarding the ultra-wideband impulse signal.

[0088] like Figure 6 As shown, this embodiment includes the following steps:

[0089] S1, ultra-wideband microstrip antenna 1 receives an ultra-wideband impulse signal, which is a detection signal;

[0090] S2, ultra-wideband pulse detection circuit 2 processes the detection signal to obtain the detection clock signal:

[0091] The ultra-wideband microstrip antenna 1 outputs the received detection signal to the ultra-wideband pulse detection circuit 2. The ultra-wideband pulse detection circuit 2 first forwards the detection signal to the radio frequency front end and sampling circuit 6, and then processes the detection signal through the radio frequency filter, the first low noise amplifier, and the pulse leading edge detector in sequence to obtain a detection clock signal, and finally outputs the detection clock signal to the time series measurement circuit 3;

[0092] S3, the time series measurement circuit 3 processes the detection clock signal to obtain a time series signal:

[0093] The time series measurement circuit 3 receives the detection clock signal output by the ultra-wideband pulse detection circuit 2 and the control signal output by the signal processing and control circuit 7. Under the control of the control signal, the time series measurement circuit 3 realizes the continuous measurement of the time intervals between adjacent pulses of the detection clock signal, and outputs the measured time series signal to the signal processing and control circuit 7.

[0094] S4, the RF front end and sampling circuit 6 process the detected signal to obtain a sampled signal:

[0095] The RF front end and sampling circuit 6 receives the detection signal forwarded by the ultra-wideband pulse detection circuit 2, processes the detection signal in sequence through the second low-noise amplifier, the anti-aliasing filter and the high-speed ADC circuit to obtain a sampling signal, implements direct RF sampling after amplifying the ultra-wideband signal, and finally outputs the sampling signal to the signal processing and control circuit 7;

[0096] S5, the signal processing and control circuit 7 processes the time series signal and the sampling signal to obtain the detected signal waveform and sequence:

[0097] The signal processing and control circuit 7 receives the time series signal output by the ultra-wideband pulse detection circuit 2 and the sampling signal output by the frequency front end and the sampling circuit 6, and sequentially passes the time series signal and the sampling signal through the clock control module, the timing measurement module, the timing position matching module, the delay control module, and the dynamic intersection timing control module to simulate the target distance and speed during the dynamic intersection, obtain the transmission signal waveform and sequence of the detection signal, and output the detection signal waveform and sequence to the dynamic delay control circuit 4;

[0098] S6, the dynamic delay control circuit 4 processes the detected signal waveform and sequence to obtain a regenerated ultra-wideband impulse signal:

[0099] The dynamic delay control circuit 4 receives the detection signal waveform and sequence output by the signal processing and control circuit 7, and sequentially passes the detection signal waveform and sequence through the first-level programmable delay circuit, the second-level programmable delay circuit, and the digital clock circuit to obtain a regenerated ultra-wideband impulse signal after delay control;

[0100] S7, the ultra-wideband pulse generating circuit 5 processes the regenerated ultra-wideband impulse signal to realize the forwarding of the detection signal and the target echo simulation:

[0101] The ultra-wideband pulse generating circuit 5 receives the regenerated ultra-wideband impulse signal output by the dynamic delay control circuit 4, passes the regenerated ultra-wideband impulse signal through the Gaussian pulse generating circuit, the radio frequency switching circuit and the filter shaping array circuit in sequence, and outputs ultra-wideband echo signals with various waveforms, thereby realizing the forwarding of the detection signal and the simulation of the target echo.

Claims

1. An ultra-wideband narrow pulse detection and analog forwarding system, characterized in that: include: An ultra-wideband microstrip antenna (1), wherein the ultra-wideband microstrip antenna (1) is used to receive an ultra-wideband impulse signal, the ultra-wideband impulse signal being a detection signal. An ultra-wideband pulse detection circuit (2) receives an output signal of an ultra-wideband microstrip antenna (1). A radio frequency front end and sampling circuit (6), wherein the radio frequency front end and sampling circuit (6) receives an output signal of the ultra-wideband pulse detection circuit (2), A time series measurement circuit (3), wherein the time series measurement circuit (3) receives an output signal of the ultra-wideband pulse detection circuit (2), A signal processing and control circuit (7), wherein the signal processing and control circuit (7) communicates bidirectionally with the time series measurement circuit (3), and the signal processing and control circuit (7) also receives output signals from the radio frequency front end and the sampling circuit (6). A dynamic delay control circuit (4), wherein the dynamic delay control circuit (4) receives an output signal of the signal processing and control circuit (7), An ultra-wideband pulse generating circuit (5) is used to forward an ultra-wideband impulse signal, and the ultra-wideband pulse generating circuit (5) receives an output signal of a dynamic delay control circuit (4).

2. The ultra-wideband narrow pulse detection and analog forwarding system according to claim 1, characterized in that: The ultra-wideband pulse detection circuit (2) is composed of a radio frequency filter, a first low noise amplifier, and a pulse front detector which are electrically connected in sequence. The input end of the radio frequency filter is matched and connected to the ultra-wideband microstrip antenna (1) via a radio frequency connector.

3. The ultra-wideband narrow pulse detection and analog forwarding system according to claim 1, characterized in that: The time series measurement circuit (3) is provided with a ps-level time delay measurement chip.

4. The ultra-wideband narrow pulse detection and analog forwarding system according to claim 1, characterized in that: The dynamic delay control circuit (4) is composed of: a primary programmable delay circuit, a secondary programmable delay circuit, and a digital clock circuit, which are electrically connected in sequence.

5. The ultra-wideband narrow pulse detection and analog forwarding system as claimed in claim 1, characterized in that: The ultra-wideband pulse generating circuit (5) is composed of: a Gaussian pulse generating circuit, a radio frequency switching circuit and a filtering shaping array circuit which are electrically connected in sequence.

6. The ultra-wideband narrow pulse detection and analog forwarding system as claimed in claim 1, characterized in that: The radio frequency front end and sampling circuit (6) is composed of: a second low noise amplifier, an anti-aliasing filter and a high-speed ADC circuit which are electrically connected in sequence.

7. An ultra-wideband narrow pulse detection and analog forwarding method, based on an ultra-wideband narrow pulse detection and analog forwarding system according to any one of claims 1 to 6, characterized in that: The ultra-wideband impulse signal transmission waveform and sequence are obtained by receiving the ultra-wideband impulse signal, measuring the time series, sampling the RF, and processing the signal. The ultra-wideband impulse signal is forwarded through dynamic delay to achieve ultra-wideband signal regeneration.

8. The method for ultra-wideband narrow pulse detection and analog forwarding as claimed in claim 7, characterized in that: The following steps are involved: S1, an ultra-wideband microstrip antenna (1) receives an ultra-wideband impulse signal, which is a detection signal; S2, the ultra-wideband pulse detection circuit (2) processes the detection signal to obtain the detection clock signal: The ultra-wideband microstrip antenna (1) outputs the received detection signal to the ultra-wideband pulse detection circuit (2), the ultra-wideband pulse detection circuit (2) first forwards the detection signal to the radio frequency front end and sampling circuit (6), then processes the detection signal in sequence through the radio frequency filter, the first low noise amplifier, and the pulse leading edge detector to obtain a detection clock signal, and finally outputs the detection clock signal to the time series measurement circuit (3); S3, the time series measurement circuit (3) processes the detection clock signal to obtain a time series signal: The time series measurement circuit (3) receives the detection clock signal output by the ultra-wideband pulse detection circuit (2) and the control signal output by the signal processing and control circuit (7). Under the control of the control signal, the time series measurement circuit (3) realizes continuous measurement of the time intervals between adjacent pulses of the detection clock signal and outputs the measured time series signal to the signal processing and control circuit (7); S4, the RF front end and sampling circuit (6) process the received signal to obtain a sampled signal: The RF front end and sampling circuit (6) receives the detection signal forwarded by the ultra-wideband pulse detection circuit (2), processes the detection signal in sequence through a second low noise amplifier, an anti-aliasing filter and a high-speed ADC circuit to obtain a sampling signal, performs RF direct sampling after amplifying the ultra-wideband signal, and finally outputs the sampling signal to the signal processing and control circuit (7); S5, signal processing and control circuit (7) processes the time series signal and the sampling signal to obtain the waveform and sequence of the detected signal: The signal processing and control circuit (7) receives the time series signal output by the ultra-wideband pulse detection circuit (2) and the sampling signal output by the frequency front end and sampling circuit (6), and sequentially passes the time series signal and the sampling signal through the clock control module, the timing measurement module, the timing position matching module, the delay control module, and the dynamic intersection timing control module to simulate the target distance and speed during the dynamic intersection, obtain the transmission signal waveform and sequence of the detection signal, and output the detection signal waveform and sequence to the dynamic delay control circuit (4); S6, the dynamic delay control circuit (4) processes the detected signal waveform and sequence to obtain a regenerated ultra-wideband impulse signal: The dynamic delay control circuit (4) receives the detection signal waveform and sequence output by the signal processing and control circuit (7), and sequentially passes the detection signal waveform and sequence through a first-level programmable delay circuit, a second-level programmable delay circuit, and a digital clock circuit to obtain a regenerated ultra-wideband impulse signal after delay control; S7, the ultra-wideband pulse generating circuit (5) processes the regenerated ultra-wideband impulse signal to realize the forwarding of the detection signal and the simulation of the target echo: The ultra-wideband pulse generating circuit (5) receives the regenerated ultra-wideband impulse signal output by the dynamic delay control circuit (4), passes the regenerated ultra-wideband impulse signal through the Gaussian pulse generating circuit, the radio frequency switch circuit and the filter shaping array circuit in sequence, and outputs ultra-wideband echo signals with various waveforms, thereby realizing the forwarding of the detection and receiving signals and the simulation of the target echo.

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