CN108089182A - Noncoherent distance measurement system and noncoherent distance measurement method - Google Patents
Noncoherent distance measurement system and noncoherent distance measurement method Download PDFInfo
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- CN108089182A CN108089182A CN201711325732.8A CN201711325732A CN108089182A CN 108089182 A CN108089182 A CN 108089182A CN 201711325732 A CN201711325732 A CN 201711325732A CN 108089182 A CN108089182 A CN 108089182A
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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
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
- G01S13/06—Systems determining position data of a target
- G01S13/08—Systems for measuring distance only
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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 present invention discloses a kind of noncoherent distance measurement system and noncoherent distance measurement method, the incoherent spread spectrum ranging that the system and method are counted based on sampled point, using sampled point by three module relations together, high-precision noncoherent distance measurement is realized in Digital Arrays distance-measuring equipment, solve the problems, such as module in Digital Arrays distance-measuring equipment be separated from each other bring be difficult with traditional approach ranging so that digital array antenna technology can be applied to noncoherent distance measurement system.Present method solves the contradictions between traditional noncoherent distance measurement mode and digital array antenna so that digital array antenna technology can be applied to noncoherent distance measurement system, while have many advantages, such as method simplicity, and easy Project Realization has good Practical effect.
Description
Technical field
The present invention relates to field of aerospace technology.More particularly, to a kind of noncoherent distance measurement system and incoherent survey
Away from method, particularly a kind of spread spectrum noncoherent distance measurement system and side applied to using sampled point counting in Digital Arrays distance-measuring equipment
Method.
Background technology
It is incoherent spread spectrum ranging principle be：Ground and aerial two distance-measuring equipments are turned using the phase difference for receiving and dispatching spreading code
Propagation delay time is changed to calculate distance, realizes ground and the distance measurement function of aerial two distance-measuring equipments.Conventional incoherent spread spectrum
Distance-measuring equipment generally includes transmitting signaling module, receives signaling module and signal processing module.
The transmitting signaling module of ground ranging equipment emits uplink spread-spectrum signal to aerial distance-measuring equipment using uplink
On, after the reception signaling module reception uplink spread-spectrum signal of aerial distance-measuring equipment, utilize the frame synchronization of its own transmission signaling module
After being sampled to uplink spread-spectrum signal, extraction uplink spread spectrum code phase information 1 is sent into signal processing module；Equally, aerial ranging
The transmitting signaling module of equipment is utilized on downlink transmission downlink spread-spectrum signal to ground ranging equipment, ground ranging equipment
After reception signaling module samples downlink spread-spectrum signal, send and frame synchronization is extracted into signal processing module, send to transmitting
In signaling module, uplink spread spectrum code phase information 2 is obtained after being sampled using frame synchronization to uplink spread-spectrum signal；Two uplink spread spectrums
Code phase information subtracts each other the distance that can obtain two distance-measuring equipments.
Digital array antenna is a kind of New System antenna, it integrates transmitting signaling module and reception signaling module, utilizes
Digital beam forming technology controls amplitude, the phase of each module receiving and transmitting signal in numeric field, is formed in space more flexible
Wave beam.Digital array antenna technology with distance-measuring equipment is combined, obtains Digital Arrays distance-measuring equipment.But in Digital Arrays distance-measuring equipment
In, transmitting signaling module and reception signaling module are integrated in digital array antenna, and signal processing module is located at digital array
Outside antenna, unlike three modules are all tightly connected in traditional distance-measuring equipment, therefore traditional noncoherent distance measurement mode utilizes digital array
Antenna is difficult to realize.
The content of the invention
It is an object of the present invention to provide a kind of noncoherent distance measurement systems, solve to emit letter in Digital Arrays distance-measuring equipment
Number module, the problem of receiving signaling module and signal processing module separation and being difficult with traditional approach ranging.
It is another object of the present invention to provide a kind of noncoherent distance measurement method, this method will be emitted using sampled point to be believed
Number module receives signaling module and signal processing module is associated together, and realizes that high-precision is non-in Digital Arrays distance-measuring equipment
Relevant ranging, solve three kinds of modules in Digital Arrays distance-measuring equipment be separated from each other bring be difficult with asking for traditional approach ranging
Topic so that digital array antenna technology can be applied to noncoherent distance measurement system.
In order to achieve the above objectives, the present invention uses following technical proposals：
The first aspect of the present invention is related to a kind of noncoherent distance measurement system, including：
First array antenna, based on the uplink spread-spectrum signal that extended receiver the second array antenna is sent, and to its into
Row sampling；Or, based on the downlink transmission downlink spread-spectrum signal synchronous with the phase information of uplink spread-spectrum signal；
First processing module handles the sampled signal of uplink spread-spectrum signal, obtains the phase of uplink spread-spectrum signal
Information；
The second array antenna, based on the downlink spread-spectrum signal that the first array antenna of down-link reception is sent, and to its into
Row sampling；Or, emit the uplink spread-spectrum signal synchronous with the phase information of downlink spread-spectrum signal based on uplink；
Second processing module handles the sampled signal of downlink spread-spectrum signal, obtains the phase of downlink spread-spectrum signal
Information；
Range finder module, by two neighboring uplink spread spectrum code phase information handled according to formula (15), obtain satellite and
Testing distance between ground control centre,
In formula (15), τ1For propagation delay time caused by the distance between satellite and ground control centre, Φ1For uplink
Uplink spread spectrum code phase exact value, Φ2After downstream spread spectrum code for downlink is converted to uplink spread spectrum code phase and corrects
Uplink spreading code exact value, fucFor uplink spreading code bit rate, c is the light velocity.
Preferably, first array antenna and the first processing module it is discrete be arranged at satellite；And/or
The second array antenna and the Second processing module it is discrete be arranged at ground control centre；
Distance of the testing distance between satellite and ground control centre.
Preferably, first array antenna includes：
First transmitting module spreads letter based on the downlink transmission downlink synchronous with the phase information of uplink spread-spectrum signal
Number；
First receiving module, based on the uplink spread-spectrum signal that extended receiver the second array antenna is sent, and to described
Uplink spread-spectrum signal is sampled, and obtains the baseband signal of the uplink spread-spectrum signal；
The first processing module obtains the local being built in first processing module with reference to spread-spectrum signal with sampling
The baseband signal of the uplink spread-spectrum signal carries out related, acquisition correlated sampling point, and the correlated sampling point is corrected,
Obtain the phase information of uplink spread-spectrum signal.
Preferably, the second array antenna includes：
Second transmitting module emits the uplink synchronous with the phase information of downlink spread-spectrum signal based on uplink and spreads letter
Number；
Second receiving module, based on the downlink spread-spectrum signal that the first array antenna of down-link reception is sent, and to described
Downlink spread-spectrum signal is sampled, and obtains the baseband signal of the downlink spread-spectrum signal；
The Second processing module obtains the local being built in Second processing module with reference to spread-spectrum signal with sampling
The baseband signal of downlink spread-spectrum signal carries out related, acquisition correlated sampling point, and the correlated sampling point is corrected, and obtains
The phase information of downlink spread-spectrum signal..
Preferably, when further including for providing unified synchronous for first transmitting module and first receiving module
First base modules of clock or for providing the of unified synchronised clock for second transmitting module and the second receiving module
Two base modules.
The second aspect of the present invention is related to a kind of noncoherent distance measurement method, and this method comprises the following steps：
Extended receiver uplink spread-spectrum signal is based on by satellite, and it is sampled；Or, based on downlink transmission
The downlink spread-spectrum signal synchronous with the phase information of uplink spread-spectrum signal；
Satellite handles the sampled signal of uplink spread-spectrum signal, obtains the phase information of uplink spread-spectrum signal；
Ground control centre is based on down-link reception downlink spread-spectrum signal, and it is sampled；Or, based on uplink
Road emits the uplink spread-spectrum signal synchronous with the phase information of downlink spread-spectrum signal；
Ground control centre handles the sampled signal of downlink spread-spectrum signal, obtains the phase letter of downlink spread-spectrum signal
Breath；
Two neighboring uplink spread spectrum code phase information according to formula (15) is handled, is obtained in satellite and ground control
Testing distance between the heart,
In formula (15), τ1For propagation delay time caused by the distance between satellite and ground control centre, Φ1For uplink
Uplink spread spectrum code phase exact value, Φ2After downstream spread spectrum code for downlink is converted to uplink spread spectrum code phase and corrects
Uplink spreading code exact value, fucFor uplink spreading code bit rate, c is the light velocity.
Preferably, emit respectively on the satellite and receive the module of spread-spectrum signal with obtaining spread-spectrum signal on the satellite
The module of phase information it is discrete be arranged at the satellite；And/or
The ground control centre emits and receives the module of spread-spectrum signal with being obtained on the ground control centre respectively
The module of spread-spectrum signal phase information it is discrete be arranged at the ground control centre；
Distance of the testing distance between satellite and ground control centre.
Preferably, the satellite is based on the downlink transmission downlink spread spectrum synchronous with the phase information of uplink spread-spectrum signal
Signal；Or,
Based on the uplink spread-spectrum signal that extended receiver ground control centre is sent, and to the uplink spread-spectrum signal into
Row is adopted；
The satellite believes base band of the built-in local with reference to the uplink spread-spectrum signal that spread-spectrum signal is obtained with sampling
It number carries out related, obtains correlated sampling point, and the correlated sampling point is corrected, obtain the phase letter of uplink spread-spectrum signal
Breath.
Preferably, the ground control centre is emitted synchronous with the phase information of downlink spread-spectrum signal based on uplink
Uplink spread-spectrum signal；Or the downlink spread-spectrum signal sent based on down-link reception satellite, and to the downlink spread-spectrum signal into
Row sampling obtains the baseband signal of the downlink spread-spectrum signal；
The base for the downlink spread-spectrum signal that the ground control centre obtains built-in local with reference to spread-spectrum signal with sampling
Band signal carries out related, acquisition correlated sampling point, and the correlated sampling point is corrected, and obtains the phase of downlink spread-spectrum signal
Position information.
Preferably, when the uplink spread-spectrum signal of the satellite reception has unified synchronous with the downlink spread-spectrum signal of transmitting
Clock, the downlink spread-spectrum signal and the uplink spread-spectrum signal of transmitting that the ground control centre receives have unified synchronised clock.
Beneficial effects of the present invention are as follows：
The noncoherent distance measurement system and noncoherent distance measurement method of the present invention solves traditional noncoherent distance measurement mode and number
Contradiction between array antenna so that digital array antenna technology can be applied to noncoherent distance measurement system, while have method letter
Just, the advantages that easy Project Realization, there is good Practical effect.
Description of the drawings
The specific embodiment of the present invention is described in further detail below in conjunction with the accompanying drawings.
Fig. 1 is the schematic diagram of the noncoherent distance measurement system of the present invention；
Fig. 2 is the flow chart of the noncoherent distance measurement method of the present invention.
Reference numeral：
1- satellites；
The first array antennas of 11-；
The first receiving modules of 111-；
The first transmitting modules of 112-；
12- first processing modules；
The first base modules of 13-；
2- ground control centres；
21- the second array antennas；
The second transmitting modules of 211-；
The second receiving modules of 212-；
22- Second processing modules；
The second base modules of 23-.
Specific embodiment
In order to illustrate more clearly of the present invention, the present invention is done further with reference to preferred embodiments and drawings
It is bright.Similar component is indicated with identical reference numeral in attached drawing.It will be appreciated by those skilled in the art that institute is specific below
The content of description is illustrative and be not restrictive, and should not be limited the scope of the invention with this.
The first aspect of the present invention is related to a kind of range-measurement system, as shown in Figure 1, the system includes：
At least one satellite 1, at least one ground control centre 2.Satellite 1 includes the first array antenna 11, the first processing
Module 12, the first base modules 13；Ground control centre 2 includes the second array antenna 21, Second processing module 22, and second
Base modules 23；First array antenna includes at least one first transmitting module 112 and at least one first receiving module 111；
The second array antenna includes at least one second transmitting module 211 and at least one second receiving module 212.
First transmitting module 112 of satellite 1, for emitting downlink spread-spectrum signal；First receiving module 111, for receiving
Uplink spread-spectrum signal, and complete A/D samplings；First processing module 12, for completing the extraction of the phase information of uplink spread-spectrum signal
With incoherent range measurement；First base modules 13, for providing system for the first transmitting module 112 and the first receiving module 111
One synchronised clock；Second transmitting module 211 of ground control centre 2, for emitting uplink spread-spectrum signal；Second receiving module
212, for receiving downlink spread-spectrum signal, and complete A/D samplings；Second processing module 22, for completing downlink spread-spectrum signal
Phase information is extracted and incoherent range measurement；Second base modules 23, for receiving mould for the second transmitting module 211 and second
Block 212 provides unified synchronised clock.
Wherein, shown in the downlink spread-spectrum signal such as formula (8) of the first transmitting module 112 transmitting,
y1(t)=AP2(t-t0)cos[2πf2(t-t0)] (8)
In formula (8), A is signal amplitude, P2(t) it is downstream spread spectrum code, f2For downlink carrier frequency, t0Represent two distance-measuring equipments
Between clock correction；
Shown in the uplink spread-spectrum signal such as formula (2) that first receiving module 111 receives,
x2(t)=AP1(t-τ1)cos[2πf1(t-τ1)] (2)
In formula (2), A is signal amplitude, P1(t) it is uplink spreading code, f1For uplink carrier frequencies；τ1For two distance-measuring equipments away from
From caused propagation delay time；
First processing module 12 performs the related operation as shown in formula (4),
Wherein, shown in the uplink spread-spectrum signal such as formula (1) of the second transmitting module 211 transmitting,
x1(t)=AP1(t)cos[2πf1(t)] (1)
In formula (1), A is signal amplitude, P1(t) it is uplink spreading code, f1For uplink carrier frequencies；
Shown in the downlink spread-spectrum signal such as formula (9) that second receiving module 212 receives,
y2(t)=AP2(t-t0-τ1)cos[2πf2(t-t0-τ1)] (9)
In formula (9), A is signal amplitude, P2(t) it is downstream spread spectrum code, f2For downlink carrier frequency, t0Represent two distance-measuring equipments
Between clock correction, τ1It is two distance-measuring equipments apart from caused propagation delay time；
Second processing module 22 is used to perform the related operation of formula (11),
The second aspect of the present invention is related to a kind of noncoherent distance measurement method, as shown in Fig. 2, the noncoherent distance measurement side of the present invention
Method can be applied to the area navigation for multiple target, and this method step includes：
1. the above-mentioned range-measurement system of structure；
2. satellite extraction uplink spread spectrum code phase information；
The uplink spread-spectrum signal that second transmitting module 211 of ground control centre 2 is sent is expressed as：
x1(t)=AP1(t)cos[2πf1(t)] (1)
In formula (1), A is signal amplitude, P1(t) it is uplink spreading code, f1For uplink carrier frequencies；
So, the uplink spread-spectrum signal that the first receiving module 111 of satellite 1 receives is represented by；
x2(t)=AP1(t-τ1)cos[2πf1(t-τ1)] (2)
In formula (2), τ1It is two distance-measuring equipments apart from caused propagation delay time；
The uplink spread-spectrum signal x that first receiving module 111 of satellite 1 will receive2(t) obtained after carrying out A/D sampling processings
Baseband digital signal is sent to first processing module 12, and spread-spectrum signal x is referred to a local in first processing module 123(t)
Carry out related operation.It is local to refer to spread-spectrum signal x3(t) it is represented by：
x3(t)=AP1(t-t0)cos[2πf1(t-t0)] (3)
In formula (3), t0Represent the clock correction between two distance-measuring equipments；
Signal correction function is defined as：
According to the property of correlation function, above formula R (τ) as τ=0 obtains maximum；So by x2(t) and x3(t) phase is carried out
It closes, is represented by：
As τ=(t-t0)-(t-τ1)=τ1-t0When, there is maximum in R (τ)；So, the discretization after A/D is sampled
Uplink signal correlation function Ru(l) it is represented by：
Ru(l)=[r (1), r (2) ..., r (N)], l=1,2 ..., N (5)
In formula (5), N is correlation function total number of sample points, and r (N) is the value of correlation function n-th point.
Assuming that Ru(l) correlation peak location for maximum occur is r (k1), it obtains corresponding sampled point and counts k1, 1≤k1≤
N.Since sampled point is discrete, it is necessary to accurately be corrected to the relevant peaks of signal using discrete correcting algorithm, further carry
High measurement accuracy；
Algorithm is as follows：1 sampled point is respectively taken with relevant peaks or so first, i.e., advanced peak, middle crest and hysteresis peak are corresponding
It is respectively k to count1-1、k1And k1+ 1, the amplitude of three sampled points is respectively L (k1-1)、L(k1) and L (k1+ 1), then count value is smart
Carefully correcting value is：
The uplink spread spectrum code phase exact value Φ of uplink after being corrected1For：
In formula (7), fs1It is satellite 1 to the sample rate of uplink spread-spectrum signal, fucFor uplink spreading code bit rate；
3. ground control centre extraction uplink spread spectrum code phase information
Second transmitting module 211 of ground control centre 2 sends downlink spread-spectrum signal and is expressed as：
y1(t)=AP2(t-t0)cos[2πf2(t-t0)] (8)
In formula (8), A is signal amplitude, P2(t) it is downstream spread spectrum code, f2For downlink carrier frequency, t0Represent two distance-measuring equipments
Between clock correction；
So, the downlink spread-spectrum signal that ground control centre 2 receives is represented by：
y2(t)=AP2(t-t0-τ1)cos[2πf2(t-t0-τ1)] (9)
In formula (9), τ1It is two distance-measuring equipments apart from caused propagation delay time；
The downlink spread-spectrum signal y that second receiving module 212 of ground control centre 2 will receive2(t) carry out at A/D samplings
Reason forms baseband signal and send to Second processing module 22, and baseband signal is spread with a local reference in Second processing module 22
Signal y3(t) related operation is carried out；It is local to refer to spread-spectrum signal y3(t) it is represented by：
y3(t)=AP2(t)cos[2πf2(t)] (10)
Signal correction function is defined as：
According to the property of correlation function, above formula R (τ) as τ=0 obtains maximum；It so will be by y2(t) and y3(t) carry out
Correlation is represented by：
As τ=t- (t-t0-τ1)=τ1+t0When, there is maximum in R (τ).So, after A/D is sampled under discretization
Row signal correction function Rd(l) it is represented by：
Rd(l)=[r (1), r (2) ..., r (N)], l=1,2 ..., N (12)
In formula (12), N is correlation function total number of sample points, and r (N) is the value of correlation function n-th point.；
Assuming that Rd(l) correlation peak location for maximum occur is r (k2), it obtains corresponding sampled point and counts k2, 1≤k2≤
N.Since sampled point is discrete, it is necessary to accurately be corrected to the relevant peaks of signal using discrete correcting algorithm, further carry
High measurement accuracy, algorithm are as follows：1 sampled point is respectively taken with relevant peaks or so first, i.e., advanced peak, middle crest and hysteresis peak are right
The counting answered is respectively k2-1、k2And k2+ 1, the amplitude of three sampled points is respectively L (k2-1)、L(k2) and L (k2+ 1), then count
Value fine correction amount is：
Since the transmitting signaling module and reception signaling module of ground survey equipment have used the unification of base modules offer
Synchronised clock, therefore downlink signal sampled point counting can be converted directly by following formula uplink spread spectrum code phase, after obtaining correction
Uplink spread spectrum code phase exact value Φ2For：
In formula (14), fs2It is ground ranging equipment to the sample rate of downlink spread-spectrum signal, fucFor uplink spreading code code speed
Rate；
4. complete noncoherent distance measurement
By the first uplink spread spectrum code phase information shown in formula (7) and the second uplink spread spectrum code phase letter shown in formula (14)
Satellite and the distance R of ground control centre are can obtain after breath processing:
In formula (15), c is the light velocity.
Obviously, the above embodiment of the present invention is only intended to clearly illustrate example of the present invention, and is not pair
The restriction of embodiments of the present invention for those of ordinary skill in the art, may be used also on the basis of the above description
To make other variations or changes in different ways, all embodiments can not be exhaustive here, it is every to belong to this hair
The obvious changes or variations that bright technical solution is extended out is still in the row of protection scope of the present invention.
Claims (9)
1. a kind of noncoherent distance measurement system, which is characterized in that including：
First array antenna based on the uplink spread-spectrum signal that extended receiver the second array antenna is sent, and is adopted it
Sample；Or, based on the downlink transmission downlink spread-spectrum signal synchronous with the phase information of uplink spread-spectrum signal；
First processing module handles the sampled signal of uplink spread-spectrum signal, obtains the phase information of uplink spread-spectrum signal；
The second array antenna based on the downlink spread-spectrum signal that the first array antenna of down-link reception is sent, and is adopted it
Sample；Or, emit the uplink spread-spectrum signal synchronous with the phase information of downlink spread-spectrum signal based on uplink；
Second processing module handles the sampled signal of downlink spread-spectrum signal, obtains the phase information of downlink spread-spectrum signal；
Two neighboring uplink spread spectrum code phase information according to formula (15) is handled, obtains satellite and ground by range finder module
Testing distance between control centre,
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In formula (15), τ1For propagation delay time caused by the distance between satellite and ground control centre, Φ1For the upper of uplink
Row spread spectrum code phase exact value, Φ2For downlink downstream spread spectrum code be converted to uplink spread code phase and correct after it is upper
Row spreading code exact value, fucFor uplink spreading code bit rate, c is the light velocity.
2. range-measurement system according to claim 1, which is characterized in that first array antenna and the first processing mould
Block it is discrete be arranged at satellite；And/or
The second array antenna and the Second processing module it is discrete be arranged at ground control centre；
Distance of the testing distance between satellite and ground control centre.
3. range-measurement system according to claim 1 or 2, which is characterized in that first array antenna includes：
First transmitting module, based on the downlink transmission downlink spread-spectrum signal synchronous with the phase information of uplink spread-spectrum signal；
First receiving module, based on the uplink spread-spectrum signal that extended receiver the second array antenna is sent, and to the uplink
Spread-spectrum signal is sampled, and obtains the baseband signal of the uplink spread-spectrum signal；
Described in the first processing module obtains the local being built in first processing module with reference to spread-spectrum signal with sampling
The baseband signal of uplink spread-spectrum signal carries out related, acquisition correlated sampling point, and the correlated sampling point is corrected, and obtains
The phase information of uplink spread-spectrum signal.
4. range-measurement system according to claim 1 or 2, which is characterized in that the second array antenna includes：
Second transmitting module emits the uplink spread-spectrum signal synchronous with the phase information of downlink spread-spectrum signal based on uplink；
Second receiving module, based on the downlink spread-spectrum signal that the first array antenna of down-link reception is sent, and to the downlink
Spread-spectrum signal is sampled, and obtains the baseband signal of the downlink spread-spectrum signal；
The downlink that the Second processing module obtains the local being built in Second processing module with reference to spread-spectrum signal with sampling
The baseband signal of spread-spectrum signal carries out related, acquisition correlated sampling point, and the correlated sampling point is corrected, and obtains downlink
The phase information of spread-spectrum signal.
5. the range-measurement system according to claim 3 or 4, which is characterized in that further include to be first transmitting module
There is provided the first base modules of unified synchronised clock with first receiving module or for for second transmitting module and
Second receiving module provides the second base modules of unified synchronised clock.
A kind of 6. noncoherent distance measurement method, which is characterized in that this method comprises the following steps：
The first array antenna in satellite is sent upper based on the second array antenna in extended receiver ground control centre
Row spread-spectrum signal, and it is sampled；
First processing module in satellite is by the local of satellite with reference to the sampled signal of spread-spectrum signal and the uplink spread-spectrum signal
Related, acquisition correlated sampling point is carried out, and the correlated sampling point is corrected, obtains the phase letter of uplink spread-spectrum signal
Breath；
The first array antenna in satellite is expanded based on the downlink transmission downlink synchronous with the phase information of uplink spread-spectrum signal
Frequency signal；
The second array antenna in ground control centre is sent down based on the first array antenna in down-link reception satellite
Row spread-spectrum signal, and it is sampled；
Second processing module in ground control centre is by the local spread-spectrum signal that refers to sampling obtained downlink spread-spectrum signal
Sampled signal carries out related, acquisition correlated sampling point, and the correlated sampling point is corrected, and obtains downlink spread-spectrum signal
Phase information.
The second array antenna in ground control centre is emitted synchronous with the phase information of downlink spread-spectrum signal based on uplink
Uplink spread-spectrum signal；
Two neighboring uplink spread spectrum code phase information is handled according to formula (15), obtain satellite and ground control centre it
Between testing distance,
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</mrow>
In formula (15), τ1For propagation delay time caused by the distance between satellite and ground control centre, Φ1For the upper of uplink
Row spread spectrum code phase exact value, Φ2For downlink downstream spread spectrum code be converted to uplink spread code phase and correct after it is upper
Row spreading code exact value, fucFor uplink spreading code bit rate, c is the light velocity.
7. according to the method described in claim 6, it is characterized in that,
First array antenna and the first processing module it is discrete be arranged at satellite；And/or
The second array antenna and the Second processing module it is discrete be arranged at ground control centre；
Distance of the testing distance between satellite and ground control centre.
8. according to the method described in claim 6, it is characterized in that, the step of this method further include：To in the satellite first
The transmitting-receiving of array antenna is synchronous into row clock.
9. according to the method described in claim 6, it is characterized in that, the step of this method further include：In controlling the ground
The transmitting-receiving of the second array antenna in the heart is synchronous into row clock.
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