CN109100700A - A kind of singly sampling Radar Signal Processing System and method - Google Patents
A kind of singly sampling Radar Signal Processing System and method Download PDFInfo
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- CN109100700A CN109100700A CN201811254524.8A CN201811254524A CN109100700A CN 109100700 A CN109100700 A CN 109100700A CN 201811254524 A CN201811254524 A CN 201811254524A CN 109100700 A CN109100700 A CN 109100700A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/41—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00 using analysis of echo signal for target characterisation; Target signature; Target cross-section
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Abstract
The invention discloses a kind of single sampling Radar Signal Processing Systems, it is related to signal processing technology field, the system includes: pseudo-random sequence generator, integration sampling device, ADC module, controller and compression area detector, integration sampling device respectively with pseudo-random sequence generator, pseudo-random sequence generator, controller and ADC module connection, ADC module is connect with compression area detector, when carrying out integration sampling to radar pulse signal due to integration sampling device, it can control the starting integration sampling time to each pulse signal, so that successively postponing the different time when each pulse signal is integrated sampling, in the single pulse repetition period, a sample value is obtained through compression sampling.The invention discloses a kind of single sampling method for processing radar signals, have sample rate low when handling using signal of this method to radar, compression ratio high and detection effect good advantage few using ADC quantity.
Description
Technical field
The present invention relates to signal processing technology field more particularly to a kind of single sampling Radar Signal Processing System and methods.
Background technique
With scientific technological advance, radar is widely used in defense military, civil aviation control, topographic survey, meteorology and boat
The various fields such as sea, so the processing of radar signal also more causes the concern of the researcher in the field.
For the radar signal of big bandwidth, conventional process mode be radar signal is obtained by nyquist sampling from
After dissipating time signal, compression processing, transmission, storage and recovery are carried out to signal, then traditional place is carried out to the signal of recovery
Reason.Traditional Radar Signal Processing mode can bring data volume big, and the processing time is long, the high problem of real-time processing cost.Due to
Radar signal be it is sparse, there are a large amount of redundancies for the information acquired by Nyquist rate, therefore there are also a kind of processing radar
The system of signal is compressed sensing based Radar Signal Processing System, and compressed sensing based implementation mainly has following four
Kind: stochastical sampling, stochastic filtering device, random demodulation, modulation bandwidth converter.
But above-mentioned compressed sensing based Radar Signal Processing System, due to the limitation of the implementation of compressed sensing,
That there is analog-digital converter (ADC, Analog-to-Digital Converter) quantity is more, compression ratio is low and detection effect is poor
Defect.
Summary of the invention
The main purpose of the present invention is to provide a kind of single sampling Radar Signal Processing System and methods, it is intended to solve existing
Compressed sensing based Radar Signal Processing System in technology, due to the limitation of the implementation of compressed sensing, there is ADC numbers
The technical issues of measuring the defects more, compression ratio is low and detection effect is poor.
To achieve the above object, first aspect of the embodiment of the present invention provides a kind of single sampling Radar Signal Processing System, should
System includes:
Pseudo-random sequence generator, integration sampling device, ADC module, controller and compression area detector；
The pseudo-random sequence generator includes: pseudo-random sequence output end；
The integration sampling device include: radar signal input terminal, pseudo-random sequence receiving end, integration sampling value output end,
Reset signal input terminal and control signal input；
The ADC module includes: integration sampling value input terminal and compression measuring value output end；
The controller includes: reset signal output end and control signal output；
The compression area detector includes: compression measuring value input terminal and target position output end；
The connection of the receiving end of the radar signal input terminal and radar, the pseudo-random sequence receiving end and the pseudorandom
The connection of sequence output end, the integration sampling value output end are connect with the integration sampling value input terminal, and the reset signal is defeated
Enter end to connect with the reset signal output end, the control signal input is connect with the control signal output；
The compression measuring value output end is connect with the compression measuring value input terminal；
The pseudo-random sequence generator, the low-speed clock signal for being inputted according to external clock generate pseudorandom sequence
Column, and the pseudo-random sequence is sent to the integration sampling device；
The controller generates reset signal and control letter after receiving the synchronization signal that the radar is sent
Number, and the reset signal is sent to the integration sampling device, and sends the control signal to the integration sampling device；
The integration sampling device, after the radar signal for receiving the target to be detected that the radar is sent, according to institute
It states pseudo-random sequence, the reset signal and the control signal and integration sampling is carried out to the radar signal, control to institute
State the starting integration sampling time of each pulse signal in radar signal so that when each pulse signal is integrated sampling according to
The secondary delay preset time；
The integration sampling device, after the integration sampling value for being also used to often obtain the pulse signal, described in one
The integration sampling value of pulse signal is sent to the ADC module；
The ADC module, after the integration sampling value for receiving the pulse signal, to the integral of the pulse signal
Sampled value is quantified, and obtains the compression measuring value of the pulse signal, and the compression measuring value of the pulse signal is sent
To the compression area detector；
The compression area detector is used for using multiple pulse signals as a compression sampling period, according to one
The compression measuring value of all pulse signals in the compression sampling period, obtains the target position of the target to be detected
It sets, and exports the target position from the target position output end.
Second aspect of the embodiment of the present invention provides a kind of single sampling method for processing radar signals, which is characterized in that the side
Method includes:
After integration sampling device receives the radar signal for the target to be detected that the radar is sent, according to the pseudorandom sequence
Column, the reset signal and the control signal carry out integration sampling to the radar signal, control to the radar signal
In each pulse signal the starting integration sampling time so that successively delay is default when each pulse signal is integrated sampling
Time；
After the integration sampling device often obtains the integration sampling value of the pulse signal, by a pulse signal
Integration sampling value be sent to the ADC module；
After the ADC module receives the integration sampling value of the pulse signal, to the integration sampling of the pulse signal
Value is quantified, and obtains the compression measuring value of the pulse signal, and the compression measuring value of the pulse signal is sent to institute
State compression area detector；
The compression area detector is using multiple pulse signals as a compression sampling period, according to a pressure
The compression measuring value of all pulse signals in the contracting sampling period obtains the target position of the target to be detected, and
The target position is exported from target position output end.
It includes: pseudorandom sequence that the embodiment of the present invention, which provides a kind of single sampling Radar Signal Processing System and method, the system,
Column generator, integration sampling device, ADC module, controller and compression area detector, integration sampling device respectively with pseudo-random sequence
Generator, pseudo-random sequence generator, controller and ADC module connection, ADC module are connect with compression area detector, due to
When integration sampling device carries out integration sampling to the pulse signal in radar signal, the product of the starting to each pulse signal can control
Divide the sampling time, so that successively postponing the different time when each pulse signal is integrated sampling, in the single pulse repetition period
In, a sample value is obtained through compression sampling, the sample rate realized far below nyquist frequency is sampled.This system exists
Have sample rate low when handling the signal of radar, structure is simple, and ADC quantity is few, and compression ratio is high and detection effect is good
The advantages of.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those skilled in the art without creative efforts, can also basis
These attached drawings obtain other attached drawings.
Fig. 1 is a kind of system construction drawing of single sampling Radar Signal Processing System provided in an embodiment of the present invention；
Fig. 2 is integration sampling schematic diagram in a kind of single sampling Radar Signal Processing System provided in an embodiment of the present invention；
Fig. 3 be another embodiment of the present invention provides a kind of single sampling Radar Signal Processing System system construction drawing；
Fig. 4 is part signal timing diagram in a kind of single sampling Radar Signal Processing System provided in an embodiment of the present invention；
Fig. 5 is a kind of reset signal timing diagram of single sampling Radar Signal Processing System provided in an embodiment of the present invention；
Fig. 6 is a kind of flow diagram of single sampling method for processing radar signals provided in an embodiment of the present invention；
Fig. 7 is a kind of error result figure of single sampling method for processing radar signals provided in an embodiment of the present invention；
Fig. 8 is a kind of mean square deviation figure of single sampling method for processing radar signals provided in an embodiment of the present invention.
Specific embodiment
In order to make the invention's purpose, features and advantages of the invention more obvious and easy to understand, below in conjunction with the present invention
Attached drawing in embodiment, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described reality
Applying example is only a part of the embodiment of the present invention, and not all embodiments.Based on the embodiments of the present invention, those skilled in the art
Member's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Referring to Fig. 1, Fig. 1 is a kind of system structure of single sampling Radar Signal Processing System provided in an embodiment of the present invention
Figure, the system include:
Pseudo-random sequence generator 10, integration sampling device 20, ADC module 30, controller 40 and compression area detector 50.
Pseudo-random sequence generator 10 includes: pseudo-random sequence output end.
Integration sampling device 20 includes: radar signal input terminal, pseudo-random sequence receiving end, integration sampling value output end, clear
Zero-signal input terminal and control signal input.
ADC module 30 includes: integration sampling value input terminal and compression measuring value output end.
Controller 40 includes: reset signal output end and control signal output.
Compression area detector 50 includes: compression measuring value input terminal and target position output end.
Further, the receiving end of the radar signal input terminal of integration sampling device 20 and radar connects, integration sampling device 20
Pseudo-random sequence receiving end connect with the pseudo-random sequence output end of pseudo-random sequence generator 10, the product of integration sampling device 20
Sampled value output end is divided to connect with the integration sampling value input terminal of ADC module 30, the reset signal input terminal of integration sampling device 20
It is connect with the reset signal output end of controller 40, the control signal input of integration sampling device 20 and the control of controller 40 are believed
The connection of number output end.
Further, the compression measuring value of the compression measuring value output end of ADC module 30 and compression area detector 50 inputs
End connection.
Pseudo-random sequence generator 10 is used to generate pseudo-random sequence according to externally input low-speed clock signal, and will be pseudo-
Random sequence is sent to integration sampling device 20.
Wherein, the radio-frequency head of radar issues synchronization signal (PRI_clk), and the radio-frequency head of radar starts to send radar signal
When, radar is started to work, and synchronization signal is generated, which can be generated by the rising edge of the enable signal of starting radar,
The rising edge for being also possible to the enable signal of the radiofrequency signal sent for radio-frequency head generates.
External clock generates low-speed clock signal (low_clk), when clock signal is in synchronous circuit, serves as timer
Function, guarantee that relevant electronic building brick is synchronized running, low-speed clock signal is far below Nyquist sampling frequency
Clock signal generates pseudo-random sequence (clk_SI) by low-speed clock signal for pseudo-random sequence generator 10.
Controller 40 issues reset signal (RST), after pseudo-random sequence generator 10 receives reset signal, pseudorandom
Sequencer 10 carries out resetting reset to pseudo-random sequence according to the reset signal.
Controller 40 issues control signal (EN), and the control signal is as integration sampling device 20 and pseudo-random sequence generator
10 enable signal.
Pseudo-random sequence generator 10 generates pseudo-random sequence, when low speed of the random pseudo-order as integration sampling device 20
Clock signal, integration sampling device 20 control sampling point position when sampling to radar signal by pseudo-random sequence.
Control signal obtains negating control signal (ADC_clk) after negating, this negates control signal as ADC module 30
Low-speed clock signal.
It is reset signal (CLR) that controller 40, which is sent to integration sampling device 20, which is used for integration sampling device
After 20 receive reset signal, integral collector removes internal data.
After controller 40 is used to receive the synchronization signal of radar transmission, reset signal and control signal are generated, and
Reset signal is sent to integration sampling device 20, and sends a control signal to integration sampling device 20.
After integration sampling device 20 is used to receive the radar signal of the target to be detected of radar transmission, according to pseudorandom sequence
Column, reset signal and control signal carry out integration sampling to radar signal, control to pulse signal each in radar signal
The integration sampling time is originated, so that successively postponing the preset time when each pulse signal is integrated sampling.
After integration sampling device 20 is also used to often obtain the integration sampling value an of pulse signal, by the product of a pulse signal
Point sampled value is sent to ADC module 30.
After ADC module 30 is used to receive the integration sampling value of pulse signal, the integration sampling value of pulse signal is carried out
Quantization, obtains the compression measuring value of pulse signal, and the compression measuring value of pulse signal is sent to compression area detector.Its
In, quantization refer to be approximately by the continuous value of signal limited multiple discrete values process, integration sampling total data be continuous value,
By being approximately multiple discrete values namely multiple compression measuring values after quantization.
Area detector 50 is compressed to be used for using multiple pulse signals as a compression sampling period, according to a compression sampling
The compression measuring value of all pulse signals in period obtains the target position of target to be detected, and exports from target position
End output target position.
Referring to Fig. 2, Fig. 2 is integration sampling in a kind of single sampling Radar Signal Processing System provided in an embodiment of the present invention
Schematic diagram.Below with schematic diagram in Fig. 2, a kind of single process for sampling integration sampling in Radar Signal Processing System is described.
As shown in Fig. 2, being wrapped in chirp signal for using linear FM signal namely chirp signal as radar signal
Containing multiple pulse repetition periods.Radar starts to emit signal, while entire processing system is started to work.Radar receives detection mesh
After marking the echo-signal sent, radar pre-processes echo-signal, obtains the radar signal namely intermediate-freuqncy signal of intermediate frequency
(IF, Intermediate Frequency) signal, and pretreated radar signal is sent to integration sampling device 20, wherein
Carrying out pretreated purpose to echo-signal is to reduce the frequency of echo-signal, to improve signal-to-noise ratio.
Further, radar starts after emitting signal, and the radio-frequency head of controller 40 and radar synchronizes work, fixed at this time
Justice was 0 moment, and controller 40 will receive the synchronization signal that the radio-frequency head of radar is sent.Integration sampling device 20 receives radar
Pretreated radar signal controls the starting integration sampling time to each chirp pulse signal, so that each chirp arteries and veins
The starting integration sampling time for rushing signal is preset time, wherein being a sampling week with B continuous chirp pulse signals
Phase namely compression sampling period, so that being successively delayed t to continuous B chirp pulse signal1, t2, t3..., tbAfterwards, start to B
A chirp pulse signal starts compression sampling respectively, respectively obtains the stochastical sampling value in each chirp pulse signal, adds up
Stochastical sampling value in each chirp pulse signal obtains the integration sampling value of each chirp pulse signal.Integration sampling device 20
After the integration sampling value for often obtaining a pulse signal, the integration sampling value of the pulse signal is sent to ADC module 30.
Wherein B is the positive integer greater than 3, and radar signal is divided into multiple compression sampling periods, B in each compression sampling period
Numerical value can be adjusted according to the actual situation.Compression sampling refers to compressed sensing, will be to analog signal in daily research
Compressed sensing is carried out, the process that compression measures is obtained and is known as compression sampling.
Further, the sample rate of integration sampling device 20 is Fs, the sampling period isThen available integration sampling
The relationship between preset time that device 20 is successively delayed to continuous B chirp pulse signal when sampling:
Wherein, tiIndicate the time that i-th of chirp pulse signal needs to be delayed, integration sampling device 20 is again to each chirp
When pulse signal is sampled, t is persistently sampledsSecond.
Further, by Fig. 2 it can be seen that, above system is a kind of to realize pressure in the way of the time-division for radar signal
Contract the Radar Signal Processing System sampled, in the single pulse repetition period, obtains a sample value, therefore this through compression sampling
System is mainly used in the signal processing of single sample radar.
In embodiments of the present invention, a kind of single sampling Radar Signal Processing System is provided, which includes: pseudo-random sequence
Generator, integration sampling device, ADC module, controller and compression area detector, integration sampling device are sent out with pseudo-random sequence respectively
Raw device, pseudo-random sequence generator, controller and ADC module connection, ADC module is connect with compression area detector, due to product
When sampler being divided to carry out integration sampling to the pulse signal in radar signal, the integral of the starting to each pulse signal can control
Sampling time, so that successively postpone the different time when each pulse signal is integrated sampling, in the single pulse repetition period,
A sample value is obtained through compression sampling, the sample rate realized far below nyquist frequency is sampled.Using the system
Have sample rate low when handling the signal of radar, structure is simple, and ADC quantity is few, and compression ratio is high and detection effect is good
The advantages of.
Referring to Fig. 3, Fig. 3 be another embodiment of the present invention provides a kind of single sampling Radar Signal Processing System system
Structure chart.
On the basis of system construction drawing in Fig. 3 is the system construction drawing in Fig. 1, its in system is described in further detail
The connection relationship of his component and the effect of component, thus in Fig. 3 with the connection and effect of same parts in Fig. 1, herein not
It repeats again, only introduces the difference of Fig. 3 and Fig. 1 below.
Controller 40 further include: synchronous signal input end and reset signal output end；Pseudo-random sequence generator further include:
Reset signal receiving end and control signal receiving end.
The synchronous signal input end of controller 40 and the radio-frequency head of radar connect, the reset signal output end of controller 40
It is connect with the reset signal receiving end of pseudo-random sequence generator 10, the control signal output and pseudo-random sequence of controller 40
The control signal receiving end of generator 10 connects.
Further, controller 40 is also used to receive the synchronization signal that the radio-frequency head of radar is sent, and is produced according to synchronization signal
Raw control signal, reset signal and reset signal, are sent to pseudo-random sequence generator 10 for control signal and reset signal,
And reset signal and control signal are sent to integration sampling device 20.
Wherein, after the synchronization signal that the radio-frequency head that controller 40 receives radar is sent, radio-frequency head and controller 40 are simultaneously
Work, i.e., 0 moment in such as Fig. 2 starts to work simultaneously, and radio-frequency head emits synchronization signal, 40 end of controller since 0 moment
The timing since 0 moment.
Further, controller 40 generates control signal according to synchronization signal, and the control signal is as control pseudorandom sequence
The enable signal that column generator 10 and integration sampling device 20 work, control signal is the pulse signal for including 1 level and 0 level,
If controlling signal when the first moment was the pulse signal of 1 level, pseudo-random sequence generator 10 and integration sampling device 20 are controlled
Work, if control signal controls pseudo-random sequence generator 10 and integration sampling in the pulse signal that the second moment was 0 level
Device 20 stops working.
Further, controller 40 generates reset signal according to synchronization signal, and the reset signal is for controlling pseudorandom sequence
Whether column generator 10 is resetted, and reset signal is the pulse signal for including 1 level and 0 level, if reset signal is first
It when moment is the pulse signal of 1 level, then controls pseudo-random sequence generator 10 and is resetted, i.e., so that pseudo-random sequence occurs
10 restoring running of device is to specific position, if reset signal controls pseudorandom sequence in the pulse signal that the second moment was 0 level
Column generator 10 works normally.
Further, controller 40 generates reset signal according to synchronization signal, and the reset signal is for controlling pseudorandom sequence
Whether column generator 10 carries out internal data clearing, and reset signal is the pulse signal for including 1 level and 0 level, if resetting letter
Number the first moment be 1 level pulse signal when, then control pseudo-random sequence generator 10 carry out internal data clearing, if clearly
Zero-signal then controls the normal work of pseudo-random sequence generator 10 in the pulse signal that the second moment was 0 level.
Further, pseudo-random sequence further include: signal receiving end.
The signal receiving end of pseudo-random sequence and the low-speed clock signal output end of external clock connect.
Pseudo-random sequence generator 10 has multiple d type flip flops to constitute jointly, and is also used to receive the low speed of external clock output
Clock signal, wherein low-speed clock signal is the clock signal far below Nyquist sampling frequency, clock frequency be how Kui
B/mono- of this special sample frequency, pseudo-random sequence generator 10 are believed according to low-speed clock signal, reset signal and control
Number, generate pseudo-random sequence.
Further, system further includes NOT gate device 60, the input terminal of NOT gate device 60 and the control signal of controller 40
Output end connection, the output end of NOT gate device 60 are connect with the control signal input of ADC module 30.
NOT gate device 60 is for obtaining negating control signal, and will take after negating the control signal that controller 40 is sent
Revertive control signal is sent to ADC module 30.
Further, what ADC module 30 was also used to receive the transmission of NOT gate device 60 negates control signal, and according to negating control
At the time of signal determination processed quantifies the integration sampling value of pulse signal.
Referring to Fig. 4, Fig. 4 is part signal in a kind of single sampling Radar Signal Processing System provided in an embodiment of the present invention
Timing diagram.Below according to the timing diagram of part signal in Fig. 4, the workflow of system is specifically described.
As shown in Figure 4, radar starts after emitting signal, and the radio-frequency head of controller 40 and radar synchronizes work, at this time
It was defined as 0 moment, controller 40 will receive the synchronization signal that the radio-frequency head of radar is sent.Controller 40 receives radar and sends
Synchronization signal after, controller 40 generates control signal, reset signal and reset signal according to synchronization signal.
Further, controller 40 will control signal and reset signal is sent to pseudo-random sequence generator 10, and will
Reset signal and control signal are sent to integration sampling device 20.
Wherein, the pulse signal that signal, reset signal and reset signal are made of 1 level and 0 level is controlled.Its
In the pulse signal of 1 level and the pulse signal of 0 level respectively represent the different conditions of signal.
Further, pseudo-random sequence receive external clock output low-speed clock signal, and according to low-speed clock signal,
Reset signal and control signal, generate pseudo-random sequence.
Further, integration sampling device 20 receives the radar signal for the detection target that radar is sent, according to pseudo-random sequence
The pseudo-random sequence that generator 10 is sent, the reset signal and control signal that controller 40 is sent, to the arteries and veins in radar signal
It rushes signal and carries out integration sampling.
Further, integration sampling device 20 controls the starting integration sampling time to each pulse signal, so that continuously
Successively postpone different preset times when pulse signal is integrated sampling.Specifically, integration sampling device 20 is passed through with reset signal
Rising edge jumps to the initial time being delayed at the time of 1 level for single pulse signal, and integration sampling device 20 is in inside at this time
Zeros data state, and since control signal is 0 level state, integration sampling device 20 does not do any place to single pulse signal
Reason, pseudo-random sequence generator 10 do not export pseudo-random sequence；When 1 lasting level of reset signal for a period of time after, reach clear
At the time of zero-signal jumps to 0 level by failing edge namely 20 internal data of integration sampling device resets and completes, at this time control letter
Number 0 level state is remained as, integration sampling device 20 does not still make any processing, pseudo-random sequence generator to single pulse signal
10 do not export pseudo-random sequence still, until believing at the time of control signal jumps to 1 level by rising edge as single pulse
The end time of number delay, namely completes the delay to single pulse signal, pseudo-random sequence generator 10 exports pseudorandom
To integration sampling device 20, integration sampling device 20 starts to carry out stochastical sampling and cumulative data to single pulse signal sequence.
Further, when integration sampling device 20 carries out integration sampling to single pulse signal, control signal is by rising
Along at the time of jumping to 1 level, as the integration sampling initial time of single pulse signal, controls signal and jumped by failing edge
At the time of to 0 level, the integration sampling as single pulse signal terminates the time, thus for radar signal lasting sampling when
Between be to be determined by control signal.
Further, when integration sampling device 20 carries out integration sampling to single pulse signal, pseudo-random sequence generator
Clock signal and calculation matrix of 10 pseudo-random sequences sent as integration sampling device 20, control the product to single pulse signal
Divide sampling location, the sampling location of single pulse signal is multiplied with pseudo-random sequence, each integration sampling position obtains one
A stochastical sampling value.Finally at the time of control signal jumps to 0 level by failing edge, integration sampling device 20 obtains single arteries and veins
It rushes all stochastical sampling values of signal and completes all stochastical sampling values that add up and obtain integration sampling value, repeat the above process and both may be used
To obtain all integration sampling values of each pulse signal in B chirp pulse signal.
Further, after integration sampling device 20 often obtains the integration sampling value an of pulse signal, by the pulse signal
Integration sampling value is sent to ADC module 30.
Further, after ADC module 30 receives the integration sampling value of pulse signal, according to negating control signal to the arteries and veins
The integration sampling value for rushing signal is quantified, and obtains the compression measuring value of the pulse signal, and by the decrement of the pulse signal
Measured value is sent to compression area detector 50.Specifically, at the time of control signal jumps to 0 level by failing edge, pseudorandom
Sequencer 10 and integration sampling device 20 stop working, negate at this time control signal by rising edge jump to 1 level when
It carves, ADC module 30 quantifies the integration sampling value of pulse signal, obtains the compression measuring value of pulse signal；When control is believed
At the time of number jumping to 1 level by rising edge, pseudo-random sequence generator 10 and integration sampling device 20 are started to work, and are taken at this time
At the time of revertive control signal jumps to 0 level by failing edge, ADC module 30 stops working.
Further, for compression area detector 50 using B chirp pulse signal as a compression sampling period, B is a
Chirp pulse signal is continuous pulse signal, according to the compression of chirp pulse signal all in a compression sampling period
Measuring value obtains the target position of target to be detected, and exports target position from the target position output end of compression area detector 50
It sets.Specifically, repeat the above steps, it is every to pass through continuous B chirp pulse signal, namely pass through a compression sampling period, pressure
Contracting area detector 50 exports the location information of a detection target.
Referring to Fig. 5, Fig. 5 is a kind of reset signal of single sampling Radar Signal Processing System provided in an embodiment of the present invention
Timing diagram.
As shown in figure 5, being opened every time using B continuous chirp pulse signals as a compression sampling period of radar signal
Begin to be generated such as to pseudo-random sequence generator 10 is resetted before the compression sampling in a compression sampling period by controller 40
Reset signal shown in Fig. 5.Reset signal is the pulse signal for including 1 level and 0 level.If reset signal is jumped by rising edge
At the time of to 1 level, pseudo-random sequence generator 10 is resetted；If reset signal by failing edge jump to 0 level when
It carves, the reset of pseudo-random sequence generator 10 terminates；If reset signal is 0 level, pseudo-random sequence generator 10 is without resetting.
In single sampling Radar Signal Processing System provided in an embodiment of the present invention, integration sampling device respectively with pseudorandom sequence
Column generator, pseudo-random sequence generator, controller and ADC module connection, ADC module are connect with compression area detector, when
When integration sampling device carries out integration sampling to the pulse signal in radar signal, the product of the starting to each pulse signal can control
Divide the sampling time, so that successively postponing the different time when each pulse signal is integrated sampling, in the single pulse repetition period
In, a sample value is obtained through compression sampling, the sample rate realized far below nyquist frequency is sampled.This system exists
Have sample rate low when handling the signal of radar, structure is simple, and ADC quantity is few, and compression ratio is high and detection effect is good
The advantages of.
Referring to Fig. 6, Fig. 6 is a kind of process signal of single sampling method for processing radar signals provided in an embodiment of the present invention
Figure.
As shown in fig. 6, this method comprises:
S101, integration sampling device receive radar transmission target to be detected radar signal after, according to pseudo-random sequence,
Reset signal and control signal carry out integration sampling to radar signal, control the starting to pulse signal each in radar signal
The integration sampling time, so that successively postponing the preset time when each pulse signal is integrated sampling.
After S102, integration sampling device often obtain the integration sampling value an of pulse signal, by the integral of a pulse signal
Sampled value is sent to ADC module.
After S103, ADC module receive the integration sampling value of pulse signal, to the integration sampling value amount of progress of pulse signal
Change, obtains the compression measuring value of pulse signal, and the compression measuring value of pulse signal is sent to compression area detector.
S104, compression area detector are using multiple pulse signals as a compression sampling period, according to a compression sampling
The compression measuring value of all pulse signals in period obtains the target position of target to be detected, and exports from target position
End output target position.
Further, integration sampling device receive radar transmission target to be detected radar signal before further include:
Controller receives the synchronization signal that radar is sent, and generates control signal, reset signal and clear according to synchronization signal
Zero-signal.
Controller will control signal and reset signal and be sent to pseudo-random sequence generator, and by reset signal and control
Signal is sent to integration sampling device.
Further, controller will control signal and reset signal is sent to after pseudo-random sequence generator and includes:
Pseudo-random sequence generator receive external clock output low-speed clock signal, and according to low-speed clock signal,
Reset signal and control signal generate pseudo-random sequence, and pseudo-random sequence is sent to integration sampling device.
Further, after integration sampling device often obtains the integration sampling value an of pulse signal, by pulse signal
Integration sampling value is sent to ADC module
It after NOT gate device negates the control signal that controller is sent, obtains negating control signal, and control letter will be negated
Number it is sent to ADC module.
Further, after ADC module receives the integration sampling value of pulse signal, to the integration sampling value of pulse signal into
Row quantization, the compression measuring value for obtaining pulse signal include:
After ADC module receives the integration sampling value of pulse signal, according to NOT gate device send negate control signal it is true
At the time of determining to quantify the integration sampling value of pulse signal, the integration sampling value of pulse signal is quantified.
Fig. 7 and Fig. 8 are please referred to, Fig. 7 is a kind of mistake of single sampling method for processing radar signals provided in an embodiment of the present invention
Poor result figure, Fig. 8 are a kind of mean square deviation figure of single sampling method for processing radar signals provided in an embodiment of the present invention.
Wherein, be in Fig. 7 target to be detected physical location and the embodiment of the present invention in using single sampling radar signal
Error result figure between the position for the target to be detected of processing method arrived；Fig. 8 is the physical location of target to be detected and this
Mean square deviation figure between the position of the target to be detected arrived using single sampling method for processing radar signals in inventive embodiments.
As can be seen that a kind of single sampling method for processing radar signals provided in an embodiment of the present invention has from Fig. 7 and Fig. 8
Sample rate is low, and structure is simple, and ADC quantity is few, and compression ratio is high, the good advantage of detection effect.It is specific to explain are as follows:
Sample rate is low.In embodiment to be sampled far below the sample rate of nyquist frequency, either ADC module
The sampling rate of clock signal or ADC module all only needs B/mono- of Nyquist sampling rate.By taking sample application as an example,
Equivalent sampling rate is 100MHz/s in sample application, and the sampling rate of the ADC module used is 10MHz/s, wherein the number of B
Value is 10.
Structure is simple, and ADC quantity is few.The randomly sub-sampled effect of multiphase is not only reached in embodiment, and either
Circuit or compression sampling circuit are pre-processed, complicated circuit structure is not all needed and is realized.
Compression ratio is high, and detection effect is good.In embodiment, within the single pulse repetition period, one is obtained through compression sampling
A sample value.By taking sample application as an example, output signal is 2560 points in the present embodiment, and it is 40 that compression, which measures number, and compression ratio is
1.56%；And to the detection target position detection error of compression measuring value in a distance unit.
For detection effect as shown in fig. 7, abscissa is detection target position, ordinate is to detect detection target position and true
Error amount between real position, compression measuring value be 10, compression ratio about 0.4%, as seen from Figure 7, measurement error ±
Within 0.1953m, it is no more than a distance unit.Compressive sampling method in the present embodiment can effectively obtain the letter of signal
Breath, effectively detects the position of object.
In embodiments of the present invention, a kind of single sampling method for processing radar signals is provided, since integration sampling device is to radar
When pulse signal in signal carries out integration sampling, the starting integration sampling time to each pulse signal can control, so that
Successively postpone the different time when each pulse signal is integrated sampling, in the single pulse repetition period, is obtained through compression sampling
To a sample value, the sample rate realized far below nyquist frequency is sampled.This method the signal to radar into
Have sample rate low when row processing, compression ratio high and detection effect good advantage few using ADC quantity.
In several embodiments provided herein, it should be understood that disclosed system and method can pass through it
Its mode is realized.For example, system embodiment described above is only schematical, for example, the division of device, only
A kind of logical function partition, there may be another division manner in actual implementation, for example, multiple devices or component can combine or
Person is desirably integrated into another system, or some features can be ignored or not executed.Another point, shown or discussed is mutual
Between coupling, direct-coupling or communication connection can be through some interfaces, the INDIRECT COUPLING or communication link of device or module
It connects, can be electrical property, mechanical or other forms.
It should be noted that for the various method embodiments described above, describing for simplicity, therefore, it is stated as a series of
Combination of actions, but those skilled in the art should understand that, the present invention is not limited by the sequence of acts described because
According to the present invention, certain steps can use other sequences or carry out simultaneously.Secondly, those skilled in the art should also know
It knows, the embodiments described in the specification are all preferred embodiments, and related actions and modules might not all be this hair
Necessary to bright.
In the above-described embodiments, it all emphasizes particularly on different fields to the description of each embodiment, there is no the portion being described in detail in some embodiment
Point, it may refer to the associated description of other embodiments.
The above are the descriptions to a kind of single sampling Radar Signal Processing System provided by the present invention and method, for ability
The technical staff in domain, thought according to an embodiment of the present invention, there will be changes in the specific implementation manner and application range,
To sum up, the contents of this specification are not to be construed as limiting the invention.
Claims (10)
1. a kind of single sampling Radar Signal Processing System, which is characterized in that the system comprises:
Pseudo-random sequence generator, integration sampling device, ADC module, controller and compression area detector；
The pseudo-random sequence generator includes: pseudo-random sequence output end；
The integration sampling device includes: radar signal input terminal, pseudo-random sequence receiving end, integration sampling value output end, resets
Signal input part and control signal input；
The ADC module includes: integration sampling value input terminal and compression measuring value output end；
The controller includes: reset signal output end and control signal output；
The compression area detector includes: compression measuring value input terminal and target position output end；
The connection of the receiving end of the radar signal input terminal and radar, the pseudo-random sequence receiving end and the pseudo-random sequence
Output end connection, the integration sampling value output end are connect with the integration sampling value input terminal, the reset signal input terminal
It is connect with the reset signal output end, the control signal input is connect with the control signal output；
The compression measuring value output end is connect with the compression measuring value input terminal；
The pseudo-random sequence generator, the low-speed clock signal for being inputted according to external clock generate pseudo-random sequence, and
The pseudo-random sequence is sent to the integration sampling device；
The controller generates reset signal and control signal after receiving the synchronization signal that the radar is sent, with
And the reset signal is sent to the integration sampling device, and send the control signal to the integration sampling device；
The integration sampling device, after the radar signal for receiving the target to be detected that the radar is sent, according to the puppet
Random sequence, the reset signal and the control signal carry out integration sampling to the radar signal, control to the thunder
Up to the starting integration sampling time of pulse signal each in signal, so that each pulse signal successively prolongs when being integrated sampling
The slow preset time；
The integration sampling device, after the integration sampling value for being also used to often obtain the pulse signal, by a pulse
The integration sampling value of signal is sent to the ADC module；
The ADC module, after the integration sampling value for receiving the pulse signal, to the integration sampling of the pulse signal
Value is quantified, and obtains the compression measuring value of the pulse signal, and the compression measuring value of the pulse signal is sent to institute
State compression area detector；
The compression area detector is used for using multiple pulse signals as a compression sampling period, according to one
The compression measuring value of all pulse signals in the compression sampling period, obtains the target position of the target to be detected,
And the target position is exported from the target position output end.
2. system according to claim 1, which is characterized in that the controller further include: synchronous signal input end and multiple
Position signal output end；
The pseudo-random sequence generator further include: reset signal receiving end and control signal receiving end；
The synchronous signal input end is connect with the radio-frequency head of the radar, the reset signal output end and the reset signal
The control signal receiving end of receiving end connection, the control signal output of the controller and the pseudo-random sequence generator connects
It connects；
The controller is also used to receive the synchronization signal that the radio-frequency head of the radar is sent, and generates institute according to the synchronization signal
Control signal, the reset signal and the reset signal are stated, the control signal and the reset signal are sent to institute
Pseudo-random sequence generator is stated, and the reset signal and the control signal are sent to the integration sampling device.
3. system according to claim 2, which is characterized in that the pseudo-random sequence further include: signal receiving end；
The signal receiving end is connect with the low-speed clock signal output end of the external clock；
The pseudo-random sequence is also used to receive the low-speed clock signal of the external clock output, and according to the low-speed clock
Signal, the reset signal and the control signal, generate the pseudo-random sequence.
4. system according to claim 3, which is characterized in that the system also includes NOT gate devices；
The input terminal of the NOT gate device is connect with the control signal output of the controller, the output end of the NOT gate device
It is connect with the control signal input of the ADC module；
After the control signal that the NOT gate device is used to send the controller negates, obtain negating control signal, and
The control signal that negates is sent to the ADC module.
5. system according to claim 4, which is characterized in that the ADC module is also used to receive the NOT gate device hair
Control signal is negated described in sending, and is carried out according to the determining integration sampling value to the pulse signal of control signal that negates
At the time of quantization.
6. a kind of single sampling method for processing radar signals, which is characterized in that the described method includes:
After integration sampling device receives the radar signal for the target to be detected that the radar is sent, according to the pseudo-random sequence,
The reset signal and the control signal carry out integration sampling to the radar signal, and control is to every in the radar signal
The starting integration sampling time of a pulse signal, when so that each pulse signal successively postponing preset when being integrated sampling
Between；
After the integration sampling device often obtains the integration sampling value of the pulse signal, by the product of a pulse signal
Point sampled value is sent to the ADC module；
After the ADC module receives the integration sampling value of the pulse signal, to the integration sampling value of the pulse signal into
Row quantization, obtains the compression measuring value of the pulse signal, and the compression measuring value of the pulse signal is sent to the pressure
Contracting area detector；
The compression area detector is adopted using multiple pulse signals as a compression sampling period according to a compression
The compression measuring value of all pulse signals in the sample period, obtains the target position of the target to be detected, and from mesh
Cursor position output end exports the target position.
7. according to the method described in claim 6, it is characterized in that, the integration sampling device receive that the radar sends to
Before the radar signal for detecting target further include:
The controller receives the synchronization signal that the radar is sent, according to the synchronization signal generation control signal, again
Position signal and the reset signal；
The control signal and the reset signal are sent to the pseudo-random sequence generator by the controller, and by institute
It states reset signal and the control signal is sent to the integration sampling device.
8. the method according to the description of claim 7 is characterized in that the controller believes the control signal and the reset
It number is sent to after the pseudo-random sequence generator and includes:
The pseudo-random sequence generator receives the low-speed clock signal of external clock output, and when according to the low speed
Clock signal, the reset signal and the control signal generate pseudo-random sequence, and the pseudo-random sequence is sent to institute
State integration sampling device.
9. according to the method described in claim 8, it is characterized in that, the integration sampling device often obtains the pulse signal
Integration sampling value after, the integration sampling value of a pulse signal be sent to before the ADC module include:
After the control signal that NOT gate device sends the controller negates, obtain negating control signal, and take described
Revertive control signal is sent to the ADC module.
10. according to the method described in claim 9, it is characterized in that, the ADC module receives the integral of the pulse signal
After sampled value, the integration sampling value of the pulse signal is quantified, the compression measuring value for obtaining the pulse signal includes:
After the ADC module receives the integration sampling value of the pulse signal, taken according to NOT gate device transmission
At the time of the determination of revertive control signal quantifies the integration sampling value of the pulse signal, the integral of the pulse signal is adopted
Sample value is quantified.
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