CN102833199B - Method and device for eliminating crossed polarization jamming - Google Patents

Abstract

The invention discloses a method and a device for eliminating the crossed polarization jamming in a wireless communication system. According to the invention, by automatically detecting an error value between a signal subjected to elimination of the crossed polarization and an ideal signal, a phase deviation value of both receiving and transmitting ends of a master polarization direction signal and a relative phase deviation value of the master polarization direction signal and a slave polarization direction signal are adaptively estimated and a coefficient of a filter is updated; the slave polarization direction signal is regulated by utilizing the relative phase deviation value of the master polarization direction signal and the slave polarization direction signal and the coefficient of the filter and the master polarization direction signal is regulated by utilizing the phase deviation value of both the receiving and transmitting ends of the master polarization direction signal and the coefficient of the filter; then aiming at the regulated master polarization direction signal and the regulated slave polarization direction signal, the signal subjected to elimination of the crossed polarization is updated; and the elimination of the crossed polarization is completed until the error value meets the error requirement set by technical indexes.

Description

Eliminate method and the device of cross polarization interference

Technical field

The present invention relates to eliminate the technical field of disturbing between cross polarization wave, relate in particular to the method and apparatus of eliminating for the cross polarization interference to different cross polarization interference degree.

Background technology

Wireless Telecom Equipment is used cochannel transmission mode, send different message slots having on two polarized signals of same frequency out of phase, these two polarized signals refer to perpendicular polarization signal and horizontal polarization signal, are sometimes called V polarized signal and H polarized signal.Between V polarized signal and H polarized signal, may disturb, this interference is called orthogonal crossover polarization and disturbs or cross polarization interference.In order to eliminate this cross polarization interference, known in this area have various cross polarizations to compensate XPIC circuit, but in application, some can only proofread and correct large frequency deviation, correction error is larger, some can only proofread and correct under same modulation system, in the wireless communication system of many debud modes now, cannot play a role.

Summary of the invention

The present invention is for avoiding the existing deficiency of above-mentioned prior art, a kind of method and device of eliminating cross polarization interference is provided, by introducing frescan, improved the correcting range of the relative frequency deviation of principal and subordinate's polarised direction, adopted CMA algorithm and LMS algorithm, made 2 ⁿunder the different debud modes of (positive integer of N=1 to 10) QAM, accurately complete the object of eliminating cross polarization interference.

The present invention is achieved through the following technical solutions.

The feature of eliminating the method for cross polarization interference in a kind of wireless communication system of the present invention is:

Polarization oscillator by reception antenna H receives the composite signal from the horizontal polarization signal of polarization of transmitting antenna H and the perpendicular polarization signal of the polarization of transmitting antenna V, and the main road that forms main polarised direction receives signal; Polarization oscillator by reception antenna V receives the perpendicular polarization signal from the polarization of described transmitting antenna V, forms and from polarised direction Cong road, receives signal; Described main road receives signal and the described signal that receives from road produces digital signal through ADC analog-to-digital conversion respectively, described digital signal is carried out to the digital demodulation of base band, form horizontal polarization signal r_H and perpendicular polarization signal r_V, in described wireless communication system, eliminate the method for cross polarization interference and carry out according to the following procedure:

A, by formula (1), described perpendicular polarization signal r_V is slightly proofreaied and correct, obtain the thick correction signal r_V' of perpendicular polarization

r_V′=e ^-jθr_V (1)

In formula (1): e ^{-j θ}=cos (θ)-jsin (θ), j is imaginary unit; θ is that horizontal polarization signal r_H is with respect to the relative skew of coarse adjustment carrier wave of perpendicular polarization signal r_V;

B, senior filter is set and from filter respectively, usings described horizontal polarization signal r_H as the input signal of senior filter, in described senior filter, export main filtering signal rl_H; Take the thick correction signal r_V' of described perpendicular polarization as the input signal from filter, from filter, exporting from filtering signal rl_V;

described senior filter coefficient matrix, described from filter coefficient matrix;

C, by formula (2), to described, from filtering signal r1_V, carry out from thin correction, obtain the compensating signal x_V of the perpendicular polarization component signal in described horizontal polarization signal r_H:

$x\_V=e^{-j{\mathrm{\φ}}_V}\·r1\_V---\left(2\right)$

In formula (2): j is imaginary unit; φ _vthat horizontal polarization signal r_H is with respect to the relative skew of fine tuning carrier wave of perpendicular polarization signal r_V;

D, by formula (3), the compensating signal x_V of described main filtering signal r1_H and described perpendicular polarization component signal is carried out to fine correction, obtains the main polarized signal x_H eliminating after cross polarization interference:

$x\_H=e^{{-\mathrm{j\φ}}_H}(r1\_H-x\_V)---\left(3\right)$

In formula (3): φ _hit is the carrier wave skew of horizontal polarization signal r_H described in fine correction;

E, described main polarized signal x_H is carried out to constellation point judgement, the judgement of described constellation point is that the constellation point of the described main polarized signal x_H that receives is replaced by the immediate constellation point under standard modulation system, and the constellation point signal after being replaced is the signal d_H after judgement;

F, main low pass filter LPF is set carries out master phase error-detecting, utilize the conjugate multiplication of the signal d_H after described main polarized signal x_H and described judgement, the result multiplying each other is got imaginary data as the input signal of main low pass filter LPF, exports the carrier wave skew φ of fine correction horizontal polarization signal r_H in described main low pass filter LPF _h;

G, to described main polarized signal x_H, judgement after signal d_H, the carrier wave skew φ of fine correction horizontal polarization signal _hcarry out error-detecting with permanent mould factor R, obtain error signal e rror; Described error signal e rror is carried out to frequency sweep, obtain described horizontal polarization signal r_H with respect to the relative skew θ of coarse adjustment carrier wave of perpendicular polarization signal r_V;

H, setting are carried out from phase error detection from low pass filter LPF, utilize the carrier wave skew φ of described fine correction horizontal polarization signal _hdescribed error signal e rror is carried out to phase compensation and obtain error phase compensating signal d_V, utilize described error phase compensating signal d_V and the described conjugate multiplication from filtering signal rl_V, the result multiplying each other is got imaginary data as the input signal from low pass filter LPF, at the described fine tuning carrier wave relative phase deviation φ that exports fine correction perpendicular polarization and horizontal polarization from low pass filter LPF _v;

I, utilize described error signal e rror to upgrade described senior filter coefficient matrix with from filter coefficient matrix

The process of j, circulation execution step a ~ i, thus cross polarization interference in wireless communication system eliminated.

The feature of eliminating the method for cross polarization interference in wireless communication system of the present invention is also:

In described step g, described error signal e rror is carried out to frequency sweep, obtains horizontal polarization signal and with respect to the method for the relative skew θ of coarse adjustment carrier wave of perpendicular polarization signal be:

A, described error signal e rror is carried out to frequency sweep, the last frequency sweep output+frequency sweep of current frequency sweep output valve fre_out=step-length, described frequency sweep step-length is the initial value that frequency sweep output valve fre_out is set is made as

B, frequency sweep locking signal is set, whether the current frequency sweep output valve fre_out of decision error signal error meets frequency sweep locking condition: fre_out<TH_error, forwards step c to, otherwise proceeds to step a, if modulation system is by 2 if meet ⁿdetermine, described TH_error value is 16000/N;

C, frequency sweep finish, and export current frequency sweep value fre_out, the relative skew θ of coarse adjustment carrier wave by phase-accumulated rear output horizontal polarization signal with respect to perpendicular polarization signal.

In step g, the computational methods of error signal e rror are undertaken by formula (4) and formula (5): first use formula (4) CMA algorithm to calculate error value, as error signal e rror<TH _lMStime, with the value of formula (5) LMS algorithm error signal error, described TH _lMSfor the threshold values of these two kinds of algorithm redirects, set TH _lMS=10000:

CMA algorithm $\mathrm{error}=2e^{{\mathrm{j\&phi;}}_H}(x\_H-d\_H)---\left(4\right)$

LMS algorithm $\mathrm{error}={4e}^{j{\mathrm{\&phi;}}_H}({|x\_H|}^2-R).x\_H---\left(5\right)$

In formula (5), permanent mould factor R is determined by formula (6):

R＝E[|s| ⁴/E[|s| ²] (6)

In formula (6), s is the horizontal polarization signal of transmitting antenna H.

The coefficient matrix of senior filter described in step I with described from filter coefficient matrix update method by formula (7), undertaken:

$c_H(n+1)=c_H\left(n\right)-{\mathrm{\&mu;}}_{c_H}\&CenterDot;\mathrm{error}\&CenterDot;r\_H^{*}$

$c_V(n+1)=c_V\left(n\right)+{\mathrm{\&mu;}}_{c_V}\&CenterDot;e^{\mathrm{j\&theta;}}\&CenterDot;e^{{\mathrm{j\&phi;}}_V}\&CenterDot;\mathrm{error}\&CenterDot;r\_V^{*}---\left(7\right)$

In formula (7), * represents conjugate operation, be respectively c _hand c _vrenewal step-length, get c _hand c _vvalue be 2 ^-30.

A kind of design feature of device of eliminating the method for cross polarization interference for realizing described wireless communication system of the present invention is to comprise:

Senior filter device: carry out filtering for the horizontal polarization signal r_H to receiving, eliminate multipath channel interference to received signal, export main filtering signal r1_H;

Thick adjuster device: slightly proofread and correct the thick correction signal r_V' of output perpendicular polarization for the perpendicular polarization signal r_V to receiving;

From filter apparatus: for thick correction signal is carried out to filtering, output is from filtering signal rl_V;

From thin adjuster device: for carrying out fine correction to described from filtering signal rl_V, the compensating signal x_V of the perpendicular polarization component signal in output horizontal polarization signal r_H;

Main thin means for correcting: for utilizing compensating signal x_V and the described main filtering signal rl_H of the perpendicular polarization component signal of described horizontal polarization signal r_H carefully to proofread and correct main filtering signal rl_H is capable, the signal after the thin correction of output;

Fine correction apparatus: carry out fine correction for the signal to after described thin correction, the main polarized signal x_H after cross polarization interference is eliminated in output;

Decision device device: carry out the judgement of constellation point for the main polarized signal x_H to after described elimination cross polarization interference, the signal of the constellation point of reception is replaced by the immediate constellation point under standard modulation system, and the signal after replacement is as the signal d_H after adjudicating;

Master phase error-detecting apparatus: this device is comprised of main multiplier and main low pass filter, the conjugated signal of signal d_H after described main polarized signal x_H and described judgement is as the input signal of multiplier, the output signal of multiplier, as the input signal of main low pass filter, is exported the carrier wave skew φ of fine correction horizontal polarization signal r H in described main low pass filter LPF _h;

Error-detecting apparatus: detect for the error that system is existed, output error signal error regulates eliminating cross polarization interference system as feedback signal;

Thick skew detector means: this device is comprised of frescan and phase accumulator, frescan is for carrying out frequency detecting to the error signal of error detector output, result after detection is sent into phase accumulator and is carried out phase-accumulatedly, obtains horizontal polarization signal r_H with respect to the relative skew θ of coarse adjustment carrier wave of perpendicular polarization signal r_V after cumulative;

From phase error detector device: this device, by forming from multiplier with from low pass filter, completes the carrier wave skew φ of master phase error detector output from multiplier _hthe phase compensation that the error signal e rror of error detector output is carried out, obtain error phase compensating signal d_V, complete simultaneously and utilize error phase compensating signal d_V and the described conjugate multiplication from filtering signal rl_V, the result multiplying each other is got imaginary data as the input signal from low pass filter, at the described fine tuning carrier wave relative phase deviation φ that exports fine correction perpendicular polarization and horizontal polarization from low pass filter _v;

Filter coefficient update apparatus: for utilizing the error signal e rror of error detector output to produce in real time the coefficient of principal and subordinate's filter apparatus, complete the feedback of eliminating cross polarization interference system.

Compared with the prior art, beneficial effect of the present invention is embodied in:

1, introduce frescan, improved the correcting range of the relative frequency deviation of principal and subordinate's polarised direction.

2, adopted CMA algorithm and LMS algorithm, overcome the shortcoming of single algorithm, made 2 ⁿunder the different debud modes of (positive integer of N=1 to 10) QAM, accurately complete the object of eliminating cross polarization interference.

Accompanying drawing explanation

Fig. 1 is the method schematic diagram that the present invention eliminates cross polarization interference;

Fig. 2 is master phase detector arrangement schematic diagram of the present invention;

Fig. 3 is that the present invention is from phase detectors structural representation;

Fig. 4 is frescan fundamental diagram of the present invention;

Fig. 5 is error detector structural representation of the present invention;

Fig. 6 is the apparatus structure schematic diagram that the present invention eliminates cross polarization interference;

Embodiment

As shown in Figure 1, in the present embodiment, by the polarization oscillator of reception antenna H, receive the composite signal from the horizontal polarization signal of polarization of transmitting antenna H and the perpendicular polarization signal of the polarization of transmitting antenna V, the main road that forms main polarised direction receives signal; Polarization oscillator by reception antenna V receives the perpendicular polarization signal from the polarization of transmitting antenna V, forms and from polarised direction Cong road, receives signal; Main road receives signal He Cong road and receives signal respectively through ADC analog-to-digital conversion generation digital signal, digital signal is carried out to the digital demodulation of base band, form horizontal polarization signal r_H and perpendicular polarization signal r_V, eliminate the method for cross polarization interference and carry out as follows:

Step 1, by formula (1), perpendicular polarization signal r_V is slightly proofreaied and correct, obtain the thick correction signal r_V ' of perpendicular polarization

r_V′=e ^-jθr_V (1)

In formula (1): e ^{-j θ}=cos (θ)-jsin (θ), j is imaginary unit; θ is that horizontal polarization signal r_H is with respect to the relative skew of coarse adjustment carrier wave of perpendicular polarization signal r_V;

Step 2, senior filter is set and from filter respectively, usings horizontal polarization signal r_H as the input signal of senior filter, in senior filter, export main filtering signal rl_H; The thick correction signal r_V' of the perpendicular polarization of take is the input signal from filter, from filter, is exporting from filtering signal rl_V;

senior filter coefficient matrix, from filter coefficient matrix;

Step 3, by formula (2) to carrying out from thin correction from filtering signal r1_V, obtain the compensating signal x_V of the perpendicular polarization component signal in horizontal polarization signal r_H:

$x\_V=e^{{-\mathrm{j\&phi;}}_V}\&CenterDot;r1\_V--\left(2\right)$

In formula (2): j is imaginary unit; φ _vthat horizontal polarization signal r_H is with respect to the relative skew of fine tuning carrier wave of perpendicular polarization signal r_V;

Step 4, by formula (3), the compensating signal x_V of main filtering signal r1_H and perpendicular polarization component signal is carried out to fine correction, obtains the main polarized signal x_H eliminating after cross polarization interference:

$x\_H=e^{{-\mathrm{j\&phi;}}_H}(r1\_H-x\_V)---\left(3\right)$

In formula (3): φ _hit is the carrier wave skew of fine correction horizontal polarization signal r_H;

Step 5, main polarized signal x_H is carried out to constellation point judgement, constellation point judgement is that the constellation point of the main polarized signal x_H that receives is replaced by the immediate constellation point under standard modulation system, and the constellation point signal after being replaced is the signal d_H after judgement;

Step 6, main low pass filter LPF is set carries out master phase error-detecting, as shown in Figure 2, the conjugate multiplication of signal d_H after utilizing main polarized signal x_H and adjudicating, the result multiplying each other is got imaginary data as the input signal of main low pass filter LPF, exports the carrier wave skew φ of fine correction horizontal polarization signal r_H in main low pass filter LPF _h;

Step 7, to main polarized signal x_H, judgement after signal d_H, the carrier wave skew φ of fine correction horizontal polarization signal _hcarry out error-detecting with permanent mould factor R, obtain error signal e rror; Error signal e rror is carried out to frequency sweep, obtain horizontal polarization signal r_H with respect to the relative skew θ of coarse adjustment carrier wave of perpendicular polarization signal r_V;

Step 8, setting are carried out from phase error detection from low pass filter LPF, as shown in Figure 3, utilize the carrier wave skew φ of fine correction horizontal polarization signal _hright error signal e rror carries out phase compensation and obtains error phase compensating signal d_V, utilize error phase compensating signal d_V with from the conjugate multiplication of filtering signal rl_V, the result multiplying each other is got imaginary data as the input signal from low pass filter LPF, is exporting the fine tuning carrier wave relative phase deviation φ of fine correction perpendicular polarization and horizontal polarization from low pass filter LPF _v;

Step 9, utilize error signal e rror to upgrade senior filter coefficient matrix with from filter coefficient matrix

The process of step 10, circulation execution step step 1 ~ step 9, thus cross polarization interference in wireless communication system eliminated.

As shown in Figure 4, in above-mentioned steps 7, obtain horizontal polarization signal and carry out as follows with respect to the method for the relative skew θ of coarse adjustment carrier wave of perpendicular polarization signal:

A, initialization frequency sweep output valve fre_out, the initial value that frequency sweep output valve fre_out is set is error signal e rror is carried out to frequency sweep, upgrade frequency sweep output valve: the last frequency sweep output+frequency sweep of current frequency sweep output valve fre_out=step-length, frequency sweep step-length is

B, judge whether frequency sweep locks: first frequency sweep locking signal is set, whether the current frequency sweep output valve fre_out of decision error signal error meets frequency sweep locking condition: fre_out<TH_error, if satisfied proceed to step c, otherwise proceed to step a;

C, frequency sweep finish, and export current frequency sweep value fre_out, the relative skew θ of coarse adjustment carrier wave by phase-accumulated rear output horizontal polarization signal with respect to perpendicular polarization signal.

As shown in Figure 5, in above-mentioned steps 7, the computational methods of error signal e rror are undertaken by formula (4) and formula (5): first use formula (4) CMA algorithm to calculate error value, set threshold values TH _lMS=10000, as error signal e rror<TH _lMStime, the value of use formula (5) LMS algorithm error signal error:

CMA algorithm $\mathrm{error}={2e}^{{\mathrm{j\&phi;}}_H}(x\_H-d\_H)---\left(4\right)$

LMS algorithm $\mathrm{error}={4e}^{j{\mathrm{\&phi;}}_H}({|x\_H|}^2-R).x\_H---\left(5\right)$

In formula (5), permanent mould factor R is determined by formula (6):

R＝E[|s| ⁴]/E[|s| ²] (6)

In formula (6), s is the horizontal polarization signal of transmitting antenna H.

In above-mentioned steps 9, senior filter coefficient matrix with from filter coefficient matrix update method by formula (7), undertaken:

$c_H(n+1)=c_H\left(n\right)-{\mathrm{\&mu;}}_{c_H}\&CenterDot;\mathrm{error}\&CenterDot;r\_H^{*}$

$c_V(n+1)=c_V\left(n\right)+{\mathrm{\&mu;}}_{c_V}\&CenterDot;e^{\mathrm{j\&theta;}}\&CenterDot;e^{{\mathrm{j\&phi;}}_V}\&CenterDot;\mathrm{error}\&CenterDot;r\_V^{*}---\left(7\right)$

In formula (7), * represents conjugate operation, be respectively c _hand c _vrenewal step-length, get c _hand c _vvalue be 2 ^-30.

As shown in Figure 6, the device of eliminating the method for cross polarization interference in the present embodiment for realizing wireless communication system comprises:

Senior filter device: carry out filtering for the horizontal polarization signal r-H to receiving, eliminate multipath channel interference to received signal, export main filtering signal rl_H;

Thick adjuster device: slightly proofread and correct the thick correction signal r_V' of output perpendicular polarization for the perpendicular polarization signal r_V to receiving;

From filter apparatus: for thick correction signal is carried out to filtering, output is from filtering signal rl_V;

From thin adjuster device: for to carrying out fine correction from filtering signal rl_V, the compensating signal x_V of the perpendicular polarization component signal in output horizontal polarization signal r_H;

Main thin means for correcting: for utilizing compensating signal x_V and the main filtering signal rl_H of the perpendicular polarization component signal of horizontal polarization signal r_H carefully to proofread and correct main filtering signal rl_H is capable, the signal after the thin correction of output;

Fine correction apparatus: carry out fine correction for the signal to after thin correction, the main polarized signal x_H after cross polarization interference is eliminated in output;

Decision device device: for the main polarized signal x_H eliminating after cross polarization interference is carried out to the judgement of constellation point, the signal of the constellation point of reception is replaced by the immediate constellation point under standard modulation system, the signal after replacement is as the signal d_H after adjudicating;

Master phase error-detecting apparatus: this device is comprised of main multiplier and main low pass filter, the conjugated signal of signal d_H after main polarized signal x_H and judgement is as the input signal of multiplier, the output signal of multiplier, as the input signal of main low pass filter, is exported the carrier wave skew φ of fine correction horizontal polarization signal r_H in main low pass filter LPF _h;

Error-detecting apparatus: detect for the error that system is existed, output error signal error regulates eliminating cross polarization interference system as feedback signal;

Thick skew detector means: this device is comprised of frescan and phase accumulator, frescan is for carrying out frequency detecting to the error signal of error detector output, result after detection is sent into phase accumulator and is carried out phase-accumulatedly, obtains horizontal polarization signal r_H with respect to the relative skew θ of coarse adjustment carrier wave of perpendicular polarization signal r_V after cumulative;

From phase error detector device: this device, by forming from multiplier with from low pass filter, completes the carrier wave skew φ of master phase error detector output from multiplier _hthe phase compensation that the error signal e rror of error detector output is carried out, obtain error phase compensating signal d_V, complete simultaneously utilize error phase compensating signal d_V with from the conjugate multiplication of filtering signal rl_V, the result multiplying each other is got imaginary data as the input signal from low pass filter, is exporting the fine tuning carrier wave relative phase deviation φ of fine correction perpendicular polarization and horizontal polarization from low pass filter _v;

Filter coefficient update apparatus: for utilizing the error signal e rror of error detector output to produce in real time the coefficient of principal and subordinate's filter apparatus, complete the feedback of eliminating cross polarization interference system.

Claims (3)

1. in a wireless communication system, eliminate the method for cross polarization interference, it is characterized in that receiving the composite signal from the horizontal polarization signal of polarization of transmitting antenna H and the perpendicular polarization signal of the polarization of transmitting antenna V by the polarization oscillator of reception antenna H, the main road that forms main polarised direction receives signal; Polarization oscillator by reception antenna V receives the perpendicular polarization signal from the polarization of described transmitting antenna V, forms and from polarised direction Cong road, receives signal; Described main road receives signal and the described signal that receives from road produces digital signal through ADC analog-to-digital conversion respectively, described digital signal is carried out to the digital demodulation of base band, form horizontal polarization signal r_H and perpendicular polarization signal r_V, in described wireless communication system, eliminate the method for cross polarization interference and carry out according to the following procedure:

A, by formula (1), described perpendicular polarization signal r_V is slightly proofreaied and correct, obtain the thick correction signal r_V' of perpendicular polarization

r_V′＝e ^-jθr_V (1)

In formula (1): e ^{-j θ}=cos (θ)-jsin (θ), j is imaginary unit; θ is that horizontal polarization signal r_H is with respect to the relative skew of coarse adjustment carrier wave of perpendicular polarization signal r_V;

B, senior filter is set and from filter respectively, usings described horizontal polarization signal r_H as the input signal of senior filter, in described senior filter, export main filtering signal rl_H; Take the thick correction signal r_V' of described perpendicular polarization as the input signal from filter, from filter, exporting from filtering signal rl_V;

described senior filter coefficient matrix, described from filter coefficient matrix;

C, by formula (2), to described, from filtering signal rl_V, carry out from thin correction, obtain the compensating signal x_V of the perpendicular polarization component signal in described horizontal polarization signal r_H:

$x\_V=e^{{-\mathrm{j\&phi;}}_V}\&CenterDot;\mathrm{rl}\_V---\left(2\right)$

In formula (2): $e^{{-\mathrm{j\&phi;}}_V}=\cos \left({\mathrm{\&phi;}}_V\right)-j\&CenterDot;\sin \left({\mathrm{\&phi;}}_V\right),$ J is imaginary unit; φ _vthat horizontal polarization signal r_H is with respect to the relative skew of fine tuning carrier wave of perpendicular polarization signal r_V;

D, by formula (3), the compensating signal x_V of described main filtering signal rl_H and described perpendicular polarization component signal is carried out to fine correction, obtains the main polarized signal x_H eliminating after cross polarization interference:

$x\_H=e^{-j{\mathrm{\&phi;}}_H}(\mathrm{rl}\_H-x\_V)---\left(3\right)$

In formula (3): φ _hit is the carrier wave skew of horizontal polarization signal r_H described in fine correction;

E, described main polarized signal x_H is carried out to constellation point judgement, the judgement of described constellation point is that the constellation point of the described main polarized signal x_H that receives is replaced by the immediate constellation point under standard modulation system, and the constellation point signal after being replaced is the signal d_H after judgement;

F, main low pass filter LPF is set carries out master phase error-detecting, utilize the conjugate multiplication of the signal d_H after described main polarized signal x_H and described judgement, the result multiplying each other is got imaginary data as the input signal of main low pass filter LPF, exports the carrier wave skew φ of fine correction horizontal polarization signal r_H in described main low pass filter LPF _h;

G, to described main polarized signal x_H, judgement after signal d_H, the carrier wave skew φ of fine correction horizontal polarization signal _hcarry out error-detecting with permanent mould factor R, obtain error signal e rror; Described error signal e rror is carried out to frequency sweep, obtain described horizontal polarization signal r_H with respect to the relative skew θ of coarse adjustment carrier wave of perpendicular polarization signal r_V;

H, setting are carried out from phase error detection from low pass filter LPF, utilize the carrier wave skew φ of described fine correction horizontal polarization signal _hdescribed error signal e rror is carried out to phase compensation and obtain error phase compensating signal d_V, utilize described error phase compensating signal d_V and the described conjugate multiplication from filtering signal rl_V, the result multiplying each other is got imaginary data as the input signal from low pass filter LPF, at the described fine tuning carrier wave relative phase deviation φ that exports fine correction perpendicular polarization and horizontal polarization from low pass filter LPF _v;

I, utilize described error signal e rror to upgrade described senior filter coefficient matrix with from filter coefficient matrix

The process of j, circulation execution step a～i, thus cross polarization interference in wireless communication system eliminated.

2. in wireless communication system according to claim 1, eliminate the method for cross polarization interference, it is characterized in that the coefficient matrix of senior filter described in step I with described from filter coefficient matrix update method by formula (7), undertaken:

$\begin{array}{c}{c}_H(n+1)=c_H\left(n\right)-{\mathrm{\&mu;}}_{c_H}\&CenterDot;\mathrm{error}\&CenterDot;r\_H^{*}\\ c_V(n+1)=c_V\left(n\right)+{\mathrm{\&mu;}}_{c_V}\&CenterDot;e^{\mathrm{j\&theta;}}\&CenterDot;e^{{\mathrm{j\&phi;}}_V}\&CenterDot;\mathrm{error}\&CenterDot;r\_V^{*}\end{array}---\left(7\right)$

In formula (7), * represents conjugate operation, be respectively c _hand c _vrenewal step-length, get c _hand c _vvalue be 2 ^-30.

3. for realizing wireless communication system described in claim 1, eliminate a device for the method for cross polarization interference, it is characterized in that comprising:

Senior filter device: carry out filtering for the horizontal polarization signal r_H to receiving, eliminate multipath channel interference to received signal, export main filtering signal rl_H;

Thick adjuster device: slightly proofread and correct the thick correction signal r_V' of output perpendicular polarization for the perpendicular polarization signal r_V to receiving;

From filter apparatus: for thick correction signal is carried out to filtering, output is from filtering signal rl_V;

From thin adjuster device: for carrying out fine correction to described from filtering signal rl_V, the compensating signal x_V of the perpendicular polarization component signal in output horizontal polarization signal r_H;

Main thin means for correcting: for utilizing compensating signal x_V and the described main filtering signal rl_H of the perpendicular polarization component signal of described horizontal polarization signal r_H carefully to proofread and correct main filtering signal rl_H is capable, the signal after the thin correction of output;

Fine correction apparatus: carry out fine correction for the signal to after described thin correction, the main polarized signal x_H after cross polarization interference is eliminated in output;

Decision device device: carry out the judgement of constellation point for the main polarized signal x_H to after described elimination cross polarization interference, the signal of the constellation point of reception is replaced by the immediate constellation point under standard modulation system, and the signal after replacement is as the signal d_H after adjudicating;

Master phase error-detecting apparatus: this device is comprised of main multiplier and main low pass filter, the conjugated signal of signal d_H after described main polarized signal x_H and described judgement is as the input signal of multiplier, the output signal of multiplier, as the input signal of main low pass filter, is exported the carrier wave skew φ of fine correction horizontal polarization signal r_H in described main low pass filter LPF _h;

Error-detecting apparatus: detect for the error that system is existed, output error signal error regulates eliminating cross polarization interference system as feedback signal;

Thick skew detector means: this device is comprised of frescan and phase accumulator, frescan is for carrying out frequency detecting to the error signal of error detector output, result after detection is sent into phase accumulator and is carried out phase-accumulatedly, obtains horizontal polarization signal r_H with respect to the relative skew θ of coarse adjustment carrier wave of perpendicular polarization signal r_V after cumulative;

From phase error detector device: this device, by forming from multiplier with from low pass filter, completes the carrier wave skew φ of master phase error detector output from multiplier _hthe phase compensation that the error signal e rror of error detector output is carried out, obtain error phase compensating signal d_V, complete simultaneously and utilize error phase compensating signal d_V and the described conjugate multiplication from filtering signal rl_V, the result multiplying each other is got imaginary data as the input signal from low pass filter, at the described fine tuning carrier wave relative phase deviation φ that exports fine correction perpendicular polarization and horizontal polarization from low pass filter _v;

Filter coefficient update apparatus: for utilizing the error signal e rror of error detector output to produce in real time the coefficient of principal and subordinate's filter apparatus, complete the feedback of eliminating cross polarization interference system.