CN101237246B - Method and device for judging non-direct reach path in wireless communication system - Google Patents

Abstract

The invention discloses a method and a device for judging an indirect path in a radio communication system, relating to the radio communication field, wherein, a corresponding R0 value and a corresponding R1 value are calculated through receipt of a baseband signal and channel estimation, and comparison and judgment are performed, thereby judgment can be simply made whether a path between a position of a mobile telephone and a surrounding base station is direct; moreover, judgment information is provided for positioning the mobile telephone by selection of 3G method, and critical steps are solved.

Description

In wireless telecommunication system, judge the method and the device of non-direct reach path

Technical field

The present invention relates to a kind ofly, especially be directed to W-CDMA system and being directed to and utilize the base station signal correlation to judge the method for non-direct reach path in the TD-SCDMA system at wireless telecommunication system.Based on this method, the invention still further relates at wireless telecommunication system, especially be directed to the W-CDMA system and be directed to the device that utilizes the base station signal correlation to judge non-direct reach path in the TD-SCDMA system.

Background technology

Along with the development of wireless communication technique, particularly the U.S. proposes after the emergency position service request, and the wireless location service more and more receives the concern of industry.

According to whether needing the participation of mobile phone to classify, mainly be divided into two types for the location technology of collecting: the mobile phone location technology that needs the mobile phone location technology of mobile phone reporting information and do not need the mobile phone reporting information.

The former, network system need be passed through the signaling mobile phone, and needs mobile phone initiatively to report relevant metrical information just can determine the particular location of mobile phone.So, mobile phone is full of ideas separates it and is in the state of being positioned.And mobile phone also can need stop under the prerequisite that is positioned the user, by not reporting relevant metrical information and reporting the method for false metrical information, makes the privacy of positional information of oneself be protected.

But for the latter, owing to do not need the active of mobile phone to participate in, mobile phone can't confirm whether it is in the state that is positioned, and this protection for mobile phone location has caused certain difficulty.A typical case of these class methods just is based on the localization method of cell id.

According to being decided to be reference signal classification, mainly be divided into 3 types: based on the location of mobile phone cell id, based on the location of base station signal/mobile phone signal and based on the location of satellite navigation system for the location technology of collecting.Wherein, relatively poor based on the localization method precision of mobile phone cell id; Localization method based on satellite navigation system needs extra equipment and cost; Localization method based on base station signal/mobile phone signal does not need to add extras and have medium positioning accuracy substantially.

Tradition based on the localization method of base station signal/mobile phone signal as shown in Figure 1.System has three base stations at least, be respectively base station 111, base station 112 and base station 113, with a mobile phone 12 with measurement capability, there be signal 131, signal 132 and the signal 133 of radio transmission in base station and mobile phone 12, and the signal propagation time that correspondence measures is respectively t1, t2, t3.Because the radio velocity of wave propagation is constant light velocity c, so, the distance of mobile phone 12 and respective base station be di=ti * c (i=1,2 ...).With the respective base station is that the center of circle, di are that radius is drawn circle 141,142,143, and then the position of intersecting point of all circles that obtain is mobile phone 12 correspondence positions.Mobile phone 12 reports the emission of the base station signal of its measurement-accept time delay to give network system, and then network just can calculate the position of mobile phone according to these values.

In real system and since have building etc. between mobile phone and the base station stop that the actual possibility of direct path that can exist is very little.Fig. 2 is a kind of typical situation, between base station 21 and the mobile phone 22 owing to there be blocking of building 23, so there is not desirable direct path 24.Simultaneously, because for the reflection of base station signal, there is the path 26 of signal transmission in another building 25 between base station 21 and the mobile phone 12.Because the principle on " triangle both sides sum is greater than the 3rd limit " in how much, so the corresponding radius of a circle that obtains according to measured value at this moment can cause the inaccurate of location estimation greater than actual value.

The understanding of phenomenon hereto develops some and have the processing and the compensation method of the navigation system of non-direct reach path at present.

The third generation (3G, 3rd Generation) mobile communication system is the mobile communication system that present most countries in the world and area are all being used or will used.3GPP (3rd GenerationPartnership Project) has finished all relevant standard operations as the normal structure of 3G.

The suggestion of each side has been adopted in relevant wireless location aspect, 3GPP tissue, has adopted whole three kinds of station-keeping modes in its standard: based on the location of mobile phone cell id, based on the location of base station signal/mobile phone signal and based on the location of satellite navigation system.

For location, adopted the method that reports of measuring of collecting based on base station signal/mobile phone signal.By each signal of base station of mobile phone for measuring time of advent, and by the signaling report network.Network is then finished the function of calculating mobile phone location.

Because the difference of wireless channel propagation path, there are a great difference in direct path and non-direct reach path on channel properties.Direct path is because exist the direct signal path of sight line, so its channel parameter variation is slower; Non-direct reach path, because there is not the direct signal path of sight line, its signal is propagated refraction and the diffraction that relies on object, and is more to the influencing factor that signal is propagated, so its channel parameter variation is also relatively more violent.On mathematical description, the channel parameter of direct path distributes and meets this distribution of Lay, and the channel parameter of non-direct reach path meets rayleigh distributed.

When practical application, judge that direct path has just become committed step with non-direct reach path.

Summary of the invention

The technical problem to be solved in the present invention provides a kind of method of judging non-direct reach path in wireless telecommunication system, can judge simply fast whether the path in the wireless telecommunication system is through; For this reason, the present invention also will provide a kind of device of judging non-direct reach path in wireless telecommunication system.

For solving the problems of the technologies described above, of the present inventionly judge that in wireless telecommunication system the method for non-direct reach path comprises the steps: that (1) receives aerial wireless signal, and carry out radiofrequency signal and handle, signal is converted into the baseband signal form; (2) demodulation respective base station signal and carry out channel estimating, the energy normalized channel estimation value of establishing the adjacent corresponding footpath of measuring for the n time to be measured is h (n); (3) after collecting N channel estimation value, calculate the relevant R of these values respectively ₀And R ₁:

Wherein N is the sampling sum, || || ₂Be 2 general numbers of plural number,

Conjugation for plural number; (4) compare R ₀And R ₁If, R ₀≤ KR ₁, K is the threshold value thresholding, then respective path is a direct path; Otherwise then respective path is a non-direct reach path.

In order to judge non-direct reach path in the wireless telecommunication system at W-CDMA, the present invention includes following steps: (1) receives aerial wireless signal, and carries out radiofrequency signal and handle, and signal is converted into the baseband signal form; (2) demodulation respective base station signal and in each time slot, carrying out channel estimating on the Common Pilot Channel, the energy normalized channel estimation value of establishing the adjacent corresponding footpath of measuring for the n time to be measured is h (n); And because the number of pilots unanimity in each time slot, so normalization factor is 1; (3) after collecting total several channel estimation values of N=sampling, calculate the relevant R of these values respectively ₀And R ₁:

$R_0={\left|\right|\underset{i=0}{\overset{N-1}{\mathrm{\Σ}}}h\left(i\right)\·\stackrel{\‾}{h\left(i\right)}\left|\right|}_2,$

Wherein || || ₂Be 2 general numbers of plural number, Conjugation for plural number; (4) compare R ₀And R ₁If, R ₀≤ KR ₁, K is the threshold value thresholding, then respective path is a direct path; Otherwise then respective path is a non-direct reach path.

In order to judge non-direct reach path in the wireless telecommunication system at TD-SCDMA, the present invention includes following steps: (1) receives aerial wireless signal, and carries out radiofrequency signal and handle, and signal is converted into the baseband signal form; (2) demodulation respective base station signal and in each time slot, carrying out channel estimating on the Common Pilot Channel, the energy normalized channel estimation value of establishing the adjacent corresponding footpath of measuring for the n time to be measured is h (n); (2.1) at TSO, promptly time slot is that channel estimating is carried out in 0 Midamble territory, and the channel estimation value in corresponding footpath to be measured is h _TS0(n); (2.2) at DwPTS, promptly descending pilot frequency time slot carries out channel estimating, and the channel estimation value in corresponding footpath to be measured is h _DwPTS(n); (2.3) read the corresponding transmitting power of base station system message acquisition TSO and DwPTS and be respectively P _TSOAnd P _DwPTS(2.4) obtain the corresponding emission of TSO and DwPTS length by agreement and be respectively L _TS0And L _DwPTS(2.5) calculating channel normalization factor: $f_{\mathrm{TS}0}=\frac{1}{L_{\mathrm{TS}0}\sqrt{P_{\mathrm{TS}0}}},$ $f_{\mathrm{DwPTS}}=\frac{1}{L_{\mathrm{DwPTS}}\sqrt{P_{\mathrm{DwPTS}}}};$ (2.6) calculating energy normalization channel estimation value is h (n):

${\hat{h}}_{\mathrm{TS}0}\left(n\right)=f_{\mathrm{TS}0}{h}_{\mathrm{TS}0}\left(n\right),$ ${\hat{h}}_{\mathrm{DwPTS}}\left(n\right)=f_{\mathrm{DwPTS}}{h}_{\mathrm{DwPTS}}\left(n\right);$

(3) after collecting total several channel estimation values of N=sampling, calculate the relevant R of these values respectively ₀And R ₁:

$R_0={\left|\right|\underset{i=0}{\overset{N-1}{\mathrm{\Σ}}}[{\hat{h}}_{\mathrm{TS}0}\left(i\right)\·\stackrel{\‾}{{\hat{h}}_{\mathrm{TS}0}\left(i\right)}+{\hat{h}}_{\mathrm{DwPTS}}\left(i\right)\·\stackrel{\‾}{{\hat{h}}_{\mathrm{DwPTS}}\left(i\right)}||}_2,$

Wherein || || ₂Be 2 general numbers of plural number,

Conjugation for plural number; (4) compare R ₀And R ₁If, R ₀≤ KR ₁, K is the threshold value thresholding, then respective path is a direct path; Otherwise then respective path is a non-direct reach path.

A kind of device of judging non-direct reach path in wireless telecommunication system of the present invention comprises as lower module: antenna receives aerial wireless signal and described transmission of wireless signals is arrived the radio frequency modular converter; Described radio frequency modular converter is handled signal, is the baseband signal form with conversion of signals; The base band receiver module receives from the baseband signal of radio frequency modular converter and carries out demodulation respective base station signal, imports the signal after handling into channel estimation module; Channel estimation module carries out channel estimating and normalization function.The signal that described channel estimation module comes out divides two-way, one the tunnel imports first conjugate module and first multiplier again respectively into, first conjugate module carries out conjugation to input signal to be handled, import the signal after handling into first multiplier and self-channel estimation module again and divide signal one in inflow first multiplier to coexist to handle in first multiplier, signal flows into and carries out accumulation process in first accumulator module afterwards; The signal of this road shunting self-channel estimation module is used for finishing the calculating of R0.Another road signal that comes out from described channel estimation module imports the time delay module and second multiplier respectively into, the time delay module is carried out after the time delay processing to input signal, import signal into second conjugate module again, signal after second conjugate module is handled enters second multiplier and carry out aggregation process with the signal that directly imports in second multiplier from channel estimation module, signal imports into again in second accumulator module afterwards, described second accumulator module is imported signal into the 3rd multiplier again, the 3rd multiplier is accepted the K value information from the outside, gathers this road signal of back and is used for finishing R ₁Calculating.Import relatively R of judging module jointly into from signal that first accumulator module spreads out of and the signal that from the 3rd multiplier, spreads out of ₀With R ₁, and the output result.

The present invention is owing to utilize direct path and the non-direct reach path difference on channel properties, method and the device of judging non-direct reach path in wireless telecommunication system are provided, thereby can simply judge between mobile phone present position and the peripheral base station whether be direct path, for selection 3G method comes locating cellphone that judgement information is provided, and solved committed step.

Description of drawings

Fig. 1 is the basic principle figure of wireless location in theory;

Fig. 2 is the schematic diagram of radio transmission in fact;

Fig. 3 is the present invention judges the method for non-direct reach path in wireless telecommunication system implementing procedure figure;

Fig. 4 the present invention is directed to the implementing procedure figure that judges the method for non-direct reach path in the W-CDMA system;

Fig. 5 the present invention is directed to the implementing procedure figure that judges the method for non-direct reach path in the TD-SCDMA system;

Fig. 6 is the present invention judges the device of non-direct reach path in wireless telecommunication system a structural representation.

Wherein 111,112,113,21 is the base station; 12,22 is mobile phone; 131,132,133 is the signal of radio transmission; 141,142,143 are circle; 23,25 is building; 24 is direct path; 26 is signal transmission path.

Embodiment

The present invention is further detailed explanation below in conjunction with accompanying drawing.

Be illustrated in figure 1 as the basic principle figure that carries out wireless location in theory, three base stations are arranged in the native system, be respectively base station 111, base station 112, with base station 113, also has a mobile phone 12 in addition with measurement capability, there are the signal of radio transmission in base station and mobile phone, be respectively the wireless signal 131 between base station 111 and the mobile phone 12, wireless signal 132 between base station 112 and the mobile phone 12, wireless signal 133 between base station 113 and the mobile phone 12, the signal propagation time that correspondence measures is respectively the signal propagation time t1 between base station 111 and the mobile phone 12, signal propagation time t2 between base station 112 and the mobile phone 12, the signal propagation time t3 between base station 113 and the mobile phone 12.Because the radio velocity of wave propagation is constant light velocity c, so, the distance of mobile phone and respective base station be di=ti * c (i=1,2 ...).With the respective base station is that the center of circle, di are that radius is drawn circle, obtaining respectively with base station 111 is that the center of circle, d1 are the circle 141 of radius, with base station 112 is that the center of circle, d2 are the circle 142 of radius, with base station 113 is that the center of circle, d3 are the circle 143 of radius, and then the position of intersecting point of all circles that obtain is mobile phone 12 correspondence positions.

Be illustrated in figure 2 as the in fact schematic diagram of radio transmission, between base station 21 and the mobile phone 22 owing to there be blocking of building 23, so there is not desirable direct path 24.Simultaneously, because for the reflection of base station signal, there is the path 26 of signal transmission in another building 25 between base station and the mobile phone.

As shown in Figure 3, introduce method flow of the present invention.At first receive aerial wireless signal, and carry out radiofrequency signal and handle, signal is converted into the baseband signal form with conventional method; Next is with conventional method demodulation respective base station signal and carry out channel estimating, and the energy normalized channel estimation value of establishing the corresponding footpath to be measured of the n time adjacent measurement is h (n); After collecting N channel estimation value, wherein the N sampling is total, and concrete numerical value is determined by Theoretical Calculation or emulation, calculated the relevant R0 and the R1 of these values respectively by following formula:

$R_0={\left|\right|\underset{i=0}{\overset{N-1}{\mathrm{\Σ}}}h\left(i\right)\·\stackrel{\‾}{h\left(i\right)}\left|\right|}_2,$

Wherein || || ₂Be 2 general numbers of plural number,

Conjugation for plural number; Next, compare R0 and R1, if R0≤KR1, (then respective path is a direct path; Otherwise then respective path is a non-direct reach path; Wherein K is the threshold value thresholding, and concrete numerical value is determined by Theoretical Calculation or emulation.

As shown in Figure 4, introduce the method implementing procedure of the present invention that is directed to the W-CDMA system.At first receive aerial wireless signal, and carry out radiofrequency signal and handle, signal is converted into the baseband signal form with conventional method; Secondly, with conventional method demodulation respective base station signal and carrying out channel estimating on the Common Pilot Channel in each time slot, the energy normalized channel estimation value of establishing the corresponding footpath to be measured of the n time adjacent measurement is h (n).Because the number of pilots unanimity in each time slot is so normalization factor is 1.After collecting N channel estimation value, wherein N is the sampling sum, and concrete numerical value is determined by Theoretical Calculation or emulation, calculated the relevant R0 and the R1 of these values respectively by following formula:

Wherein || || ₂Be 2 general numbers of plural number,

Conjugation for plural number; Compare R0 and R1, if R0≤KR1, then respective path is a direct path; Otherwise then respective path is a non-direct reach path, and wherein K is the threshold value thresholding, and concrete numerical value is determined by Theoretical Calculation or emulation.

As shown in Figure 5, introduce the method implementing procedure of the present invention that is directed to the TD-SCDMA system.At first adopt conventional method to receive aerial wireless signal, and carry out radiofrequency signal and handle, signal is converted into the baseband signal form.Secondly adopt conventional method demodulation respective base station signal equally and carrying out channel estimating on the Common Pilot Channel in each time slot, the energy normalized channel estimation value of establishing the corresponding footpath to be measured of the n time adjacent measurement is h (n).Concrete grammar is as follows:

A. at TSO, promptly time slot is that the channel estimation value that the corresponding footpath to be measured of channel estimating is carried out in training sequence (Midamble) territory of 0 (Time Slot 0) is hTSO (n);

B. at DwPTS, promptly to carry out the channel estimation value in the corresponding footpath to be measured of channel estimating be hDwPTS (n) to descending pilot frequency time slot (Downlink Pilot Time Slot);

C. read the corresponding transmitting power of base station system message acquisition TSO and DwPTS and be respectively PTSO and PDwPTS;

D. be respectively LTSO and LDwPTS by agreement TSO and the corresponding emission of DwPTS length.

Again by following formula calculating channel normalization factor:

$f_{\mathrm{TS}0}=\frac{1}{L_{\mathrm{TS}0}\sqrt{P_{\mathrm{TS}0}}},$ $f_{\mathrm{DwPTS}}=\frac{1}{L_{\mathrm{DwPTS}}\sqrt{P_{\mathrm{DwPTS}}}}$

Calculating energy normalization channel estimation value is h (n):

${\hat{h}}_{\mathrm{TS}0}\left(n\right)=f_{\mathrm{TS}0}{h}_{\mathrm{TS}0}\left(n\right),{\hat{h}}_{\mathrm{DwPTS}}\left(n\right)=f_{\mathrm{DwPTS}}{h}_{\mathrm{DwPTS}}\left(n\right)$

After collecting total several channel estimation values of N=sampling, calculate the relevant R0 and the R1 of these values respectively, wherein the concrete numerical value of N is determined by Theoretical Calculation or emulation:

$R_0={\left|\right|\underset{i=0}{\overset{N-1}{\mathrm{\Σ}}}[{\hat{h}}_{\mathrm{TS}0}\left(i\right)\·\stackrel{\‾}{{\hat{h}}_{\mathrm{TS}0}\left(i\right)}+{\hat{h}}_{\mathrm{DwPTS}}\left(i\right)\·\stackrel{\‾}{{\hat{h}}_{\mathrm{DwPTS}}\left(i\right)}||}_2,$

Wherein || || ₂Be 2 general numbers of plural number,

Conjugation for plural number.

Compare R0 and R1, if R0≤KR1, then respective path is a direct path; Otherwise then respective path is a non-direct reach path, and wherein K is the threshold value thresholding, and concrete numerical value is determined by Theoretical Calculation or emulation.

Fig. 6 is the structural representation of device of the present invention.Wherein, antenna 601 and radio frequency modular converter 602 are finished and are received aerial wireless signal, and carry out radiofrequency signal and handle, and signal are converted into the function of baseband signal form; Base band receiver module 603 and channel estimation module 604 are finished demodulation respective base station signal and are carried out channel estimating and the normalization function; First conjugate module 605, first multiplier 606 and first accumulator module 607 are finished R0 and are calculated; Time delay module 608, second conjugate module 609, second multiplier 610 and second accumulator module 611 are finished R1 and are calculated; Whether the 3rd multiplier 612, constant K 613 and judging module finish the arbitration functions of direct path.

Specifically, antenna 601 receives aerial wireless signal and described transmission of wireless signals is arrived radio frequency modular converter 602; Described radio frequency modular converter 602 is handled signal, is the baseband signal form with conversion of signals; Base band receiver module 603 receives from the baseband signal of radio frequency modular converter 602 and carries out demodulation respective base station signal, imports the signal after handling into channel estimation module 604; Channel estimation module 604 carries out channel estimating and normalization function.The signal that described channel estimation module 604 comes out divides two-way, one the tunnel imports first conjugate module 605 and first multiplier 606 again respectively into, 605 pairs of input signals of first conjugate module carry out conjugation to be handled, import the signal after handling into first multiplier 606 again and coexist and handle in first multiplier 606 with flowed into signal one first multiplier 606 in 604 minutes from channel estimation module, signal flows in first accumulator module 607 again and carries out accumulation process afterwards; The signal of this road shunting self-channel estimation module 604 is used for finishing the calculating of R0.Another road signal that comes out from described channel estimation module 604 imports the time delay module 608 and second multiplier 610 respectively into, 608 pairs of input signals of time delay module carry out after the time delay processing, import signal into second conjugate module 609 again, signal after second conjugate module 609 is handled enters second multiplier 610 and carry out aggregation process with the signal that directly imports in second multiplier 610 from channel estimation module 604, signal imports into again in second accumulator module 611 afterwards, described second accumulator module 611 is imported signal into the 3rd multiplier 612 again, the 3rd multiplier 612 is accepted the information from constant K 613 values of outside, gathers the calculating that this road signal of back is used for finishing R1.Import judging module 614 relatively R0 and R1 jointly into from first accumulator module 607 signal that spreads out of and the signal that from the 3rd multiplier 612, spreads out of, and the output result.

Claims (6)

1. a method of judging non-direct reach path in wireless telecommunication system is characterized in that, comprises the steps:

(1) receives aerial wireless signal, and carry out radiofrequency signal and handle, signal is converted into the baseband signal form;

(2) demodulation respective base station signal and carry out channel estimating, the energy normalized channel estimation value of establishing the adjacent corresponding footpath of measuring for the n time to be measured is h (n);

(3) after collecting N channel estimation value, calculate the relevant R of these values respectively ₀And R ₁:

$R_0={\left|\right|\underset{i=0}{\overset{N-1}{\mathrm{\Σ}}}h\left(i\right)\·\stackrel{\‾}{h\left(i\right)}\left|\right|}_2,$ $R_1={\left|\right|\underset{i=0}{\overset{N-1}{\mathrm{\Σ}}}h\left(i\right)\stackrel{\‾}{h(i+1)}\left|\right|}_2,$ Wherein N is the sampling sum, || || ₂Be 2 general numbers of plural number, Conjugation for plural number;

(4) compare R ₀And R ₁If, R ₀≤ KR ₁, K is the threshold value thresholding, then respective path is a direct path; Otherwise then respective path is a non-direct reach path.

2. a method of judging non-direct reach path at the wireless telecommunication system of W-CDMA is characterized in that, comprises the steps:

(1) receives aerial wireless signal, and carry out radiofrequency signal and handle, signal is converted into the baseband signal form;

(2) demodulation respective base station signal and in each time slot, carrying out channel estimating on the Common Pilot Channel, the energy normalized channel estimation value of establishing the adjacent corresponding footpath of measuring for the n time to be measured is h (n); And because the number of pilots unanimity in each time slot, so normalization factor is 1;

(3) after collecting N channel estimation value, calculate the relevant R of these values respectively ₀And R ₁:

$R_0={\left|\right|\underset{i=0}{\overset{N-1}{\mathrm{\Σ}}}h\left(i\right)\·\stackrel{\‾}{h\left(i\right)}\left|\right|}_2,$ $R_1={\left|\right|\underset{i=0}{\overset{N-1}{\mathrm{\Σ}}}h\left(i\right)\stackrel{\‾}{h(i+1)}\left|\right|}_2,$ Wherein N is the sampling sum, || || ₂Be 2 general numbers of plural number, Conjugation for plural number;

(4) compare R ₀And R ₁If, R ₀≤ KR ₁, K is the threshold value thresholding, then respective path is a direct path; Otherwise then respective path is a non-direct reach path.

3. a method of judging non-direct reach path at the wireless telecommunication system of TD-SCDMA is characterized in that, comprises the steps:

(1) receives aerial wireless signal, and carry out radiofrequency signal and handle, signal is converted into the baseband signal form;

(2) demodulation respective base station signal and in each time slot, carrying out channel estimating on the Common Pilot Channel, the energy normalized channel estimation value of establishing the adjacent corresponding footpath of measuring for the n time to be measured is h (n);

(2.1) be that channel estimating is carried out in 0 o'clock training sequence territory at time slot TS, the channel estimation value in corresponding footpath to be measured is h _TS0(n);

(2.2) at descending pilot frequency time slot DwPTS, carry out channel estimating, the channel estimation value in corresponding footpath to be measured is h _DwPTS(n);

(2.3) reading base station system message, to obtain time slot TS be that the transmitting power of 0 o'clock and descending pilot frequency time slot DwPTS correspondence is respectively P _TS0And P _DwPTS

(2.4) obtaining time slot TS by agreement is that the emission length of 0 o'clock and descending pilot frequency time slot DwPTS correspondence is respectively L _TS0And L _DwPTS

(2.5) calculating channel normalization factor:

$f_{\mathrm{TS}0}=\frac{1}{L_{\mathrm{TS}0}\sqrt{P_{\mathrm{TS}0}}},$ $f_{\mathrm{DwPTS}}=\frac{1}{L_{\mathrm{DwPTS}}\sqrt{P_{\mathrm{DwPTS}}}};$

(2.6) calculating energy normalization channel estimation value is h (n), comprises

With

${\hat{h}}_{\mathrm{TS}0}\left(n\right)=f_{\mathrm{TS}0}{h}_{\mathrm{TS}0}\left(n\right),$ ${\hat{h}}_{\mathrm{DwPTS}}\left(n\right)=f_{\mathrm{DwPTS}}{h}_{\mathrm{DwPTS}}\left(n\right);$

(3) after collecting N channel estimation value, calculate the relevant R of these values respectively ₀And R ₁:

$R_0={\left|\right|\underset{i=0}{\overset{N-1}{\mathrm{\Σ}}}[{\hat{h}}_{\mathrm{TS}0}\left(i\right)\·\stackrel{\‾}{{\hat{h}}_{\mathrm{TS}0}\left(i\right)}+{\hat{h}}_{\mathrm{DwPTS}}\left(i\right)\·\stackrel{\‾}{{\hat{h}}_{\mathrm{DwPTS}}\left(i\right)}||}_2,$

$R_1=2{\left|\right|\underset{i=0}{\overset{N-1}{\mathrm{\Σ}}}{\hat{h}}_{\mathrm{TS}0}\left(i\right)\stackrel{\‾}{{\hat{h}}_{\mathrm{DwPTS}}(i+1)}\left|\right|}_2,$ Wherein N is the sampling sum, || || ₂Be 2 general numbers of plural number,

Conjugation for plural number;

(4) compare R ₀And R ₁If, R ₀≤ KR ₁, K is the threshold value thresholding, then respective path is a direct path; Otherwise then respective path is a non-direct reach path.

4. according to claim 1 or the 2 or 3 described methods of judging non-direct reach path in wireless telecommunication system, it is characterized in that: in the described step (3), the concrete numerical value of N is determined by Theoretical Calculation or emulation.

5. according to claim 1 or the 2 or 3 described methods of judging non-direct reach path in wireless telecommunication system, it is characterized in that: in the described step (4), the concrete numerical value of K is determined by Theoretical Calculation or emulation.

6. a device of judging non-direct reach path in wireless telecommunication system is characterized in that, comprises as lower module: antenna receives aerial wireless signal and described transmission of wireless signals is arrived the radio frequency modular converter; Described radio frequency modular converter is handled signal, is the baseband signal form with conversion of signals; The base band receiver module receives from the baseband signal of radio frequency modular converter and carries out demodulation respective base station signal, imports the signal after handling into channel estimation module; Channel estimation module carries out channel estimating and normalization function; The signal that described channel estimation module comes out divides two-way, wherein, the first via is imported first conjugate module and first multiplier into, first conjugate module carries out conjugation to input signal to be handled, import the signal after handling into first multiplier and self-channel estimation module again and divide signal one in inflow first multiplier to coexist to handle in first multiplier, signal flows into and carries out accumulation process in first accumulator module afterwards; The signal of first via shunting self-channel estimation module is used for finishing R ₀Calculating; The second road signal that comes out from described channel estimation module imports the time delay module and second multiplier respectively into, the time delay module is carried out after the time delay processing to input signal, import signal into second conjugate module again, signal after second conjugate module is handled enters second multiplier and carry out aggregation process with the signal that directly imports in second multiplier from channel estimation module, signal imports into again in second accumulator module afterwards, described second accumulator module is imported signal into the 3rd multiplier again, the 3rd multiplier is accepted the K value information from the outside, gathers back the second road signal and is used for finishing R ₁Calculating; Import relatively R of judging module jointly into from first accumulator module signal that spreads out of and the signal that from the 3rd multiplier, spreads out of ₀With R ₁, and the output result.

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