CN-121978670-A - Ranging radar device based on ultra-wideband resolvable chaotic synchronization

Abstract

The invention provides a range radar device based on ultra-wideband resolvable chaotic synchronization, which relates to the technical field of radar ranging and comprises a first ultra-wideband resolvable chaotic signal generating circuit unit, a second digital excitation circuit unit, a third ultra-wideband resolvable chaotic signal synchronizing circuit unit and a fourth wideband related receiving circuit unit. The invention solves the radar real-time ranging problem with high resolution and high measurement signal-to-noise ratio, realizes high resolution real-time related ranging through the generating circuit and the receiving circuit of the ultra-wideband resolvable chaotic signal, and only needs to simulate a matched filter to finish related receiving, thereby avoiding high sampling rate data pressure and large related calculated amount. In addition, the digital excitation circuit drives to realize the synchronization of the resolvable chaotic signal of the receiving end, and the chaotic echo signal is accurately reconstructed to improve the signal-to-noise ratio of the ranging.

Inventors

• XU HANG
• QIN ZILONG
• Guo Kanglong
• ZHANG JIANGUO
• LIU LI
• LI JINGXIA
• WANG BINGJIE

Assignees

• 太原理工大学

Dates

Publication Date

20260505

Application Date

20260202

Claims (5)

1. 1. A range radar device based on ultra-wideband resolvable chaotic synchronization is characterized by comprising a first unit ultra-wideband resolvable chaotic signal generating circuit, a second unit digital excitation circuit, a third unit ultra-wideband resolvable chaotic signal synchronizing circuit and a fourth unit wideband related receiving circuit, wherein the ultra-wideband resolvable chaotic signal generating circuit is used for generating a transmitting signal V P (t), the ultra-wideband resolvable chaotic signal synchronizing circuit is used for receiving an echo signal V E (t) formed by reflecting a transmitting signal transmitted through a medium after being reflected by a target, the digital excitation circuit is used for generating a physical random code and sending the physical random code to the ultra-wideband resolvable chaotic signal generating circuit and the ultra-wideband resolvable chaotic signal synchronizing circuit, and the wideband related receiving circuit is used for receiving signals output by the ultra-wideband resolvable chaotic signal generating circuit and the ultra-wideband resolvable chaotic signal synchronizing circuit and measuring time delay to realize range finding.
2. 2. The ranging radar device based on ultra-wideband resolvable chaotic synchronization according to claim 1, wherein the first unit ultra-wideband resolvable chaotic signal generating circuit comprises a two-stage improved Colpitts oscillating circuit, a comparator 1, a D trigger, a differentiating circuit, a zero crossing detector, a switch compensating circuit and a gain adjustment forcing function; The two-stage improved Colpitts oscillation circuit comprises a base electrode power supply voltage V bb ,V bb output end of a triode Q 1 connected to a first resistor R 1 , the other end of the first resistor R 1 connected to the base electrode of a triode Q 1 , a collector electrode power supply voltage V cc ,V cc output end of a triode Q 1 connected to a second resistor R 2 , the other end of the second resistor R 2 connected to the collector electrode of a triode Q 1 , A fourth capacitor C 4 is further connected between the collector and the base of the triode Q 1 , the other end of the first capacitor C 1 is connected to the emitter of the triode Q 1 and one end of the second capacitor C 2 , the emitter of the triode Q 1 is connected to the collector of the triode Q 2 , the other end of the second capacitor C 2 is connected to the emitter of the triode Q 2 and one end of the third capacitor C 3 , the emitter of the triode Q 2 is connected to one end of the fourth resistor R 4 , the other end of the fourth resistor R 4 is connected to the other end of the emitter supply voltage V ee ;C 3 of the triode Q 2 and to the ground, the base of the triode Q 2 is connected to one end of the inductor L, the other end of the inductor L is connected to one end of the third resistor R 3 , the other end of the third resistor R 3 is connected to the ground, and the second resistor R 2 , The common connection end of the first capacitor C 1 and the ninth resistor R 9 is the output end of a transmitting signal V P (t); The common terminal of the second resistor R 2 , the first capacitor C 1 and the ninth resistor R 9 is connected to the positive input terminal of the comparator 1, the negative input terminal of the comparator 1 is connected to the ground, and the output terminal of the comparator 1 is connected to the signal input terminal D of the D trigger; The differential circuit comprises a ninth resistor R 9 , wherein the other end of the ninth resistor R 9 is connected to a sixth capacitor C 6 , the other end of the sixth capacitor C 6 is connected to the reverse input end of the operational amplifier 4 and one end of a tenth resistor R 10 , the positive input end of the operational amplifier 4 is connected to the ground, and the output end of the operational amplifier 4 is connected to the other end of the tenth resistor R 10 ; The zero-crossing detector comprises a comparator 2, an operational amplifier 4, a nor gate and a D trigger, wherein the output end of the operational amplifier 4 is connected to the reverse input end of the comparator 2 and the forward input end of the comparator 3, the forward input end of the comparator 2 is connected to the ground, the output end of the comparator 2 is connected to the input end 1 of the nor gate, the reverse input end of the comparator 3 is connected to the ground, the output end of the comparator 3 is connected to the input end 2 of the nor gate, and the output end of the nor gate is connected to the clock input CLK end of the D trigger; The switch compensation circuit comprises an operational amplifier 1, wherein a forward input end of the operational amplifier 1 is connected to one end of a ninth resistor R 9 , a reverse input end of the operational amplifier 1 is connected to an output end of the operational amplifier 1, an output end of the operational amplifier 1 is connected to one end of a fifth resistor R 5 , the other end of the fifth resistor R 5 is connected to a reverse input end of the operational amplifier 3, an output end of the operational amplifier 3 is connected to the reverse input end of the operational amplifier 3 and one end of an eighth resistor R 8 , the other end of the eighth resistor R 8 is connected to the ground, a middle tap end of the eighth resistor R 8 is connected to an output end of a NOR gate, a forward input end of the operational amplifier 2 is connected to the forward input end of the operational amplifier 1, a reverse input end of the operational amplifier 2 is connected to one end of a sixth resistor R 6 , the other end of the sixth resistor R 6 is connected to one end of a seventh resistor R 7 and the forward input end of the operational amplifier 3, and the other end of the seventh resistor R 7 is connected to the ground; The gain adjustment forcing function comprises an operational amplifier 5, wherein the output end of the operational amplifier 5 is connected to the positive input end of the operational amplifier 2 and an eleventh resistor R 11 , the other end of the eleventh resistor R 11 is connected to the negative input end of the operational amplifier 5, and the positive input end of the operational amplifier 5 is connected to the output Q end of the D trigger through a twelfth resistor R 12 .
3. 3. The ranging radar device based on the ultra-wideband resolvable chaotic synchronization according to claim 2, wherein the second unit digital excitation circuit comprises an autonomous Boolean network and a D trigger 1, the autonomous Boolean network comprises 6 exclusive OR gates U 1 - U 6 with three-input and three-output functions, 1 output end 1 of the exclusive or gate with three inputs and three outputs is connected to input end 1 of U, output end 1 of U is connected to output end 2 of U is connected to input end 2 of U, output end 2 of U is connected to input end of U end 2, output end 2 of U being connected to input end 2 of U, output end 2 of U being connected to connected to the input end 2 of U, the output end 2 of U is connected to the input end of U connected to the input 2 of U, the output 2 of U being connected to U input terminal 2, output terminal 2 of U is connected to input terminal of U 6 The output end 3 of the U 7 is connected to the input end 3 of the U 4 , the output end 3 of the U 7 is connected to the input end 3;U 7 of the U 5 , the output end 3 of the Boolean chaotic signal is connected to the signal input end D of the D trigger 1, the clock signal is connected to the clock input CLK end of the D trigger 1, the output end Q of the D trigger 1 outputs the physical random code V rand (t) and is simultaneously connected to the transmitting signal output V P (t) end of the first ultra wideband resolvable chaotic signal generating circuit unit and the echo signal receiving V E (t) end of the third ultra wideband resolvable chaotic signal synchronizing circuit unit.
4. 4. The ranging radar device based on ultra-wideband resolvable chaotic synchronization according to claim 3, wherein the third unit ultra-wideband resolvable chaotic signal synchronizing circuit comprises a two-stage improved Colpitts oscillating circuit, a comparator 1, a D trigger, a differentiating circuit, a zero crossing detector, a switch compensating circuit and a gain adjustment forcing function; The two-stage improved Colpitts oscillation circuit comprises a base electrode power supply voltage V bb ,V bb output end of a triode Q 1 connected to a first resistor R 1 , the other end of the first resistor R 1 connected to the base electrode of a triode Q 1 , a collector electrode power supply voltage V cc ,V cc output end of a triode Q 1 connected to a second resistor R 2 , the other end of the second resistor R 2 connected to the collector electrode of a triode Q 1 , A fourth capacitor C 4 is further connected between the collector and the base of the triode Q 1 , the other end of the first capacitor C 1 is connected to the emitter of the triode Q 1 and one end of the second capacitor C 2 , the emitter of the triode Q 1 is connected to the collector of the triode Q 2 , the other end of the second capacitor C 2 is connected to the emitter of the triode Q 2 and one end of the third capacitor C 3 , the emitter of the triode Q 2 is connected to one end of the fourth resistor R 4 , the other end of the fourth resistor R 4 is connected to the other end of the emitter supply voltage V ee ;C 3 of the triode Q 2 and to the ground, the base of the triode Q 2 is connected to one end of the inductor L, the other end of the inductor L is connected to one end of the third resistor R 3 , the other end of the third resistor R 3 is connected to the ground, and the second resistor R 2 , The common connection end of the first capacitor C 1 and the ninth resistor R 9 is an input end of an ultra-wideband resolvable chaotic echo signal V E (t); The common terminal of the second resistor R 2 , the first capacitor C 1 and the ninth resistor R 9 is connected to the positive input terminal of the comparator 1, the negative input terminal of the comparator 1 is connected to the ground, and the output terminal of the comparator 1 is connected to the signal input terminal D of the D trigger; The differential circuit comprises a ninth resistor R 9 , wherein the other end of the ninth resistor R 9 is connected to a sixth capacitor C 6 , the other end of the sixth capacitor C 6 is connected to the reverse input end of the operational amplifier 4 and one end of a tenth resistor R 10 , the positive input end of the operational amplifier 4 is connected to the ground, and the output end of the operational amplifier 4 is connected to the other end of the tenth resistor R 10 ; The zero-crossing detector comprises a comparator 2, an operational amplifier 4, a nor gate and a D trigger, wherein the output end of the operational amplifier 4 is connected to the reverse input end of the comparator 2 and the forward input end of the comparator 3, the forward input end of the comparator 2 is connected to the ground, the output end of the comparator 2 is connected to the input end 1 of the nor gate, the reverse input end of the comparator 3 is connected to the ground, the output end of the comparator 3 is connected to the input end 2 of the nor gate, and the output end of the nor gate is connected to the clock input CLK end of the D trigger; The switch compensation circuit comprises an operational amplifier 1, wherein a forward input end of the operational amplifier 1 is connected to one end of a ninth resistor R 9 , a reverse input end of the operational amplifier 1 is connected to an output end of the operational amplifier 1, an output end of the operational amplifier 1 is connected to one end of a fifth resistor R 5 , the other end of the fifth resistor R 5 is connected to a reverse input end of the operational amplifier 3, an output end of the operational amplifier 3 is connected to the reverse input end of the operational amplifier 3 and one end of an eighth resistor R 8 , the other end of the eighth resistor R 8 is connected to the ground, a middle tap end of the eighth resistor R 8 is connected to an output end of a NOR gate, a forward input end of the operational amplifier 2 is connected to the forward input end of the operational amplifier 1, a reverse input end of the operational amplifier 2 is connected to one end of a sixth resistor R 6 , the other end of the sixth resistor R 6 is connected to one end of a seventh resistor R 7 and the forward input end of the operational amplifier 3, and the other end of the seventh resistor R 7 is connected to the ground; The gain adjustment forcing function comprises an operational amplifier 5, wherein the output end of the operational amplifier 5 is connected to the forward input end of the operational amplifier 2 and an eleventh resistor R 11 , the other end of the eleventh resistor R 1 1 is connected to the reverse input end of the operational amplifier 5, and the forward input end of the operational amplifier 5 is connected to the output Q end of the D trigger through a twelfth resistor R 12 .
5. 5. The ranging radar apparatus based on the ultra-wideband resolvable chaotic synchronization according to claim 4, wherein the fourth unit wideband-dependent receiving circuit comprises a high-speed shift register and a high-speed tap delay line; The ultra-wideband resolvable chaotic emission signal V P (t) of the first unit is connected to the reverse input end of the comparator 4 in the wideband correlation receiving circuit, the output signal V s (t) of the gain adjustment forcing function is connected to the forward input end of the comparator 4, the output signal S (t) of the output Q end of the D trigger is connected to the DATA input DATA end of the high-speed shift register and the input end 1 of the exclusive-OR gate U 8 , the output end of the comparator 4 is connected to the input end 2 of the exclusive-OR gate U 8 , the output end of the exclusive-OR gate U 8 is connected to the clock signal input CLK end of the high-speed shift register and the input end of the counter, the output signal S 1 of the counter is connected to the enable signal input EN end of the high-speed shift register, the output signal S 2 is connected to the input end 1 of the multiplier 1, the output signal S n-1 is connected to the input end 1 of the multiplier n-1, and the output signal S n is connected to the input end 1 of the multiplier n; The ultra-wideband resolvable chaotic synchronous signal V' E (t) output by the third unit gain adjustment forcing function is connected to the input end of a high-speed tap delay line, the output end 1 of the high-speed tap delay line is connected to the positive input end of the differential amplifier 1, the output end 2 is connected to the negative input end of the differential amplifier 1 and the positive input end of the differential amplifier 2, the output end n-1 is connected to the negative input end of the differential amplifier n-1 and the positive input end of the differential amplifier n, and the output end n is connected to the negative input end of the differential amplifier n; the output end of the differential amplifier 1 is connected to the input end 2 of the multiplier 1, the output end of the differential amplifier 2 is connected to the input end 2 of the multiplier 2, the output end of the differential amplifier n-1 is connected to the input end 2 of the multiplier n-1, the output end of the differential amplifier n is connected to the input end 2 of the multiplier n, the output end of the multiplier 1 is connected to one end of a resistor R 1 , the other end of the resistor R 1 is connected to the forward input end of the operational amplifier, the output end of the multiplier 2 is connected to one end of a resistor R 2 , the other end of the resistor R 2 is connected to the forward input end of the operational amplifier, the output end of the multiplier n-1 is connected to one end of a resistor R n-1 , the other end of the resistor R n-1 is connected to one end of a resistor R n , the other end of the resistor R n is connected to the forward input end of the operational amplifier, the forward input end of the operational amplifier is connected to one end of a capacitor C 1 , the other end of the capacitor C 1 is connected to the output end of the operational amplifier, the reverse input end of the operational amplifier is connected to the ground, the output end of the operational amplifier is connected to one end of the inductor L, the other end of the inductor L is connected to the resistor R and one end of the capacitor C 2 , and the other end of the resistor R is connected to the other end of the capacitor C 2 and the ground.

Description

Ranging radar device based on ultra-wideband resolvable chaotic synchronization Technical Field The invention relates to the technical field of radar ranging, in particular to a real-time ranging device with high resolution and high measurement signal-to-noise ratio, and specifically relates to a ranging radar device based on ultra-wideband resolvable chaotic synchronization. Background Radar ranging is a key technology for acquiring one-dimensional distance information of a target. The one-dimensional distance information is not only basic space dimension data, but also an important basis for realizing the application of target positioning and tracking, two-dimensional/three-dimensional imaging, life detection, behavior perception and the like. Thus, radar ranging technology is an indispensable importance in many ranging systems. The conventional radar apparatus is classified into a linear frequency modulation continuous wave radar, a step frequency continuous wave radar, an ultra wideband pulse radar, and a random signal radar according to signal types. The linear frequency modulation/stepping frequency continuous wave radar can be used for realizing distance measurement by calculating the phase or frequency difference value, and the ultra-wideband pulse radar can be used for calculating the target distance by using the ultra-narrow pulse flight time. However, the unambiguous detection performance of a chirped/stepped frequency continuous wave radar is limited by its high range side lobes, ultra wideband pulse radar requires high pulse energy when implementing long range detection, narrow pulse width when implementing high resolution detection, and extremely narrow pulses of high energy are relatively difficult to generate, resulting in a compromise between detection range and resolution. In addition, the three radars are easily affected by external electromagnetic interference, and have limited anti-interference performance. The random signal radar represented by the chaotic radar obtains the distance information between the target and the radar by performing correlation processing on the reference signal and the echo signal. The chaotic signal has the characteristics of wide frequency band, low autocorrelation sidelobes, large time bandwidth product and the like, so that the radar has high distance resolution, strong anti-interference capability and electronic countermeasures, and is widely applied to through-wall imaging, life detection, underground target identification and human behavior perception. However, the traditional chaotic radar needs to sample the broadband signal at a high speed and then implement related calculation, so that the real-time processing is difficult, the calculation load is heavy, the consumption of storage resources is high, and the scanning rate and the real-time performance of the chaotic radar are restricted. Resolvable chaos is a hybrid system comprising a second order differential equation and discrete switching conditions, whose resolvable solution can be written as a linear convolution of a binary discrete sequence and a fixed basis function, which allows correlation reception through a simple analog matched filter without digital sampling or signal processing. The first proposed resolvable chaotic oscillator is realized based on an-RLC oscillating circuit. Subsequently, an alternative to a solvable chaotic oscillator implemented using a common base Colpitts oscillator was implemented. Recently, a method of compensating for the propagation delay defect of a resolvable chaotic oscillator based on an RLC oscillation circuit has also been proposed. The two methods effectively improve the fundamental frequency of the resolvable chaotic signal, thereby improving the ranging precision of the resolvable chaotic radar. In addition, based on the synchronous characteristic of the resolvable chaotic signal, the accurate reconstruction of the echo signal can be realized, so that the signal-to-noise ratio of the related ranging is effectively improved. In summary, research on the ranging radar based on the ultra-wideband resolvable chaotic synchronization has important practical significance, and the ranging radar can realize real-time ranging with high range resolution and high measurement signal-to-noise ratio. Disclosure of Invention The invention provides a range finding radar device based on ultra-wideband resolvable chaotic synchronization, which is used for realizing real-time range finding with high resolution and high measurement signal-to-noise ratio. The high-resolution real-time related ranging is realized through the generation circuit and the receiving circuit of the ultra-wideband resolvable chaotic signal, the related receiving is finished only by an analog matched filter, and the high-sampling-rate data pressure and the large related calculated amount are avoided. In addition, the digital excitation circuit drives to realize the synchronization of the resolvable c