CN101267228A - A multi-path search and tracking method in WCDMA base station receiver based on DSP - Google Patents

Abstract

The present invention presents a multipath searching and tracing method in a WCDMA base station receiver realized by the DSP. In the WCDMA mobile communication system, a multipath searching and tracing is one of the key function module of the WCDMA base station. The invention uses a DSP for realizing the function of multipath searching and tracing of the WCDMA. The multipath searching and tracing method of the WCDMA realized with the DSP comprises the following functional modules: an interference code generating module, a multipath searching module, a multipath tracing module and a management module. The multipath searching module and the multipath tracing module respectively obtain a local scrambling code from a scrambling generating module. The antenna data is obtained from a code piece data caching area. The relative parameter is obtained from the user state information for multipath searching and tracing. The multipath searching module is organically combined with other baseband functional modules and leads to that the baseband module of the WCDMA base station receiver is more flexible and the upgrading is more convenient.

Description

A kind ofly utilize Multipath searching and tracking in the WCDMA base station receiver that DSP realizes

Technical field

The present invention relates to a kind of mobile communication receiver technology, be specifically related to Multipath searching and tracking in the WCDMA receiver that a kind of DSP of utilization realizes.

Background technology

In mobile communication system, the wireless signal between base station and travelling carriage transmits in mobile channel.In the WCDMA mobile communication system, also be the same.The main feature of mobile channel is to exist attenuation, slow fading and all kinds of multipath rapid fading.What wherein transmission reliability is had the greatest impact is all kinds of rapid fadings, and they are space selective fading, frequency selective fading and time selective fading.Diversity technique is that research collects the signal energy that objective multidiameter fading channel disperses effectively, is a kind of effective measures that tackle these declines.In the WCDMA system, utilize the RAKE reception technique to merge multipath fading signal, the RAKE reception technique also is a kind of diversity technique.

Because user's mobility at random, the quantity of the multipath component that receives, size (amplitude), time delay, phase place are random quantity, thereby resultant vector also is a random quantity.In the WCDMA base station receiver, generally be to receive separately with each path by the RAKE that utilizes FPGA to realize, phase alignment is used, then vector at random and can become more stable algebraical sum and be used.Therefore in the RAKE receiver that FPGA realizes, comprise the search and the following function of multipath.But there is underaction in the RAKE receiver that FPGA realizes, be unfavorable for the defective of upgrading.All the time, realize the search of multipath and the hot issue that tracking is Project Realization with DSP.Because the DSP development of technology adopts DSP to realize that the search and the tracking of multipath are the development in future directions.

Summary of the invention

The objective of the invention is to propose a kind of WCDMA base station receiver Multipath searching and tracking of realizing with DSP.

The functional module that WCDMA base station receiver Multipath searching that the DSP of utilization of the present invention realizes and tracking comprise has: scrambler generation module, Multipath searching module, multipath tracking module, administration module.The Multipath searching module is finished user's Multipath searching and is handled; The multipath tracking module is finished functions such as frequency offset estimating, multipath tracking, functions such as the Multipath searching management that administration module is finished the user and multipath tracking management.Multipath searching module and multipath tracking module obtain local scrambler segment from the scrambler generation module respectively, get antenna data from the chip data buffer area, obtain relevant parameter from user state information and carry out Multipath searching and tracking.The multi-path searching results of Multipath searching module is given administration module with form of message, and the Multipath searching module also can be upgraded some parameter (as message queue parameter etc.) of user state information in addition.The data of chip data buffer area can be brought in constant renewal in, and the parameter about Multipath searching in the user state information also can be brought in constant renewal in by administration module.The result of multipath tracking module is also given administration module.The multipath tracking module also can be upgraded some parameter of user state information.

The scrambler generation module produces scrambler, is used for Multipath searching.When the user sets up, number obtain the scrambling generator initial condition according to user's scrambler, initial condition is kept in the User Status variable, produce assigned address in 38400 scrambler sequence later on as required, the scrambler segment of designated length, production method is consistent with regulation in the 3GPP TS25.213 agreement.

The function that the Multipath searching module is finished is: calculate PDP (Power Delay Profile) time delay multipath energy; Detect multipath and report administration module according to PDP.The key step of this module comprises: the scrambler that obtains when utilizing Radio Link to set up carries out related operation to antenna data; According to coherent integration length, the related operation result is carried out coherent integration; According to non-coherent integration length, carry out non-coherent integration then, obtain PDP; Calculate thresholding according to PDP; After energy done further selection greater than the path of thresholding, the multipath information of finally determining (position and the energy in number, each footpath) is reported administration module.

The multipath tracking module is mainly finished multipath tracking, channel estimating, and SIR estimates, functions such as frequency offset estimating.

Administration module is mainly finished user's search management and multipath management.

Search is managed the final multipath that participates in the demodulation merging of main basis and is determined the original position of search window and the size of search window, and search is managed at each user's postamble and carried out.Can dynamically adjust search window according to the state of Radio Link.

The multipath information that the multipath management mainly utilizes Multipath searching and multipath tracking to report is determined the final multipath that demodulation merges that participates in according to multipath quality quality, and the multipath management is carried out at each user's postamble.If in the multipath management, have Search Results and tracking results to need to handle simultaneously, handle tracking results earlier, output participates in the multipath that demodulation merges; Handle Search Results then, distribute the multipath that participates in tracking.The quality of multipath quality shows as the size of multipath energy.

At each user's postamble, carry out the multipath management earlier, determine that this time slot finally participates in the multipath that demodulation merges, carry out the search management again.

Description of drawings

Fig. 1 is that Multipath searching and tracking processing module concern schematic diagram;

Fig. 2 is that Search Results is handled schematic diagram;

Fig. 3 is that tracking results is handled schematic diagram.

Embodiment

Below in conjunction with accompanying drawing and example, the invention will be further described.

As shown in Figure 1, the Multipath searching module is finished user's Multipath searching processing; The multipath tracking module is finished frequency offset estimating, functions such as multipath tracking, functions such as the Multipath searching management that administration module is finished the user and multipath allocation manager.The Search Results of Multipath searching module reports administration module with form of message.User state information is a global variable in oval, the initialization when Radio Link is set up of this variable.The Multipath searching module only need read the search parameter of user state information variable.Some parameter that the multipath tracking module reads user state information (for example refers to peak information, channel estimating, signal-to-jamming ratio) carries out demodulation and estimation, give the multipath administration module multipath tracking result, and frequency offset estimating value and channel coefficients estimated value are write the user state information variable.Administration module carries out the multipath management according to Multipath searching message and multipath tracking result, and multipath information is written to the user state information variable.

The scrambler generation module produces scrambler, is used for Multipath searching.When the user sets up, number obtain the scrambling generator initial condition according to user's scrambler, initial condition is kept in the User Status variable, produce assigned address in 38400 scrambler sequence later on as required, the scrambler segment of designated length, production method is consistent with regulation in the 3GPP TS25.213 agreement.

The function that the Multipath searching module is finished is: calculate PDP (Power Delay Profile); Detect multipath and report administration module according to PDP.The key step of this module comprises: the scrambler that obtains when utilizing Radio Link to set up carries out related operation to antenna data; According to coherent integration length, the related operation result is carried out coherent integration; According to non-coherent integration length, carry out non-coherent integration then, obtain PDP; Calculate thresholding according to PDP; After energy done further selection greater than the path of thresholding, the multipath information of finally determining (position and the energy in number, each footpath) is reported administration module.

Detailed process is as follows:

(1) related operation and coherent integration.Wherein, the sampling interval of antenna data is 1/2chip.

Input:

Restart: restart to search for calculation flag, be set to 1 when generally beginning to search for;

The implication in each territory among the params:

Phase_a_base: the initial address of a circulation buffer is used to store the antenna data that is positioned at integer chip position;

Phase_b_base: the initial address of another circulation buffer is used to store the antenna data that is positioned at the 1/2chip position;

Phase_num_chips: the length of circulation buffer, unit is 1chip;

Phase_a_offset: with the distance of phase_a_base original position;

Phase_b_offset: with the distance of phase_b_base original position;

Descrambling_code_ptr: scrambler pointer;

Pilot_sign_ptr: the frequency pilot sign pointer, determine by time slot format;

Num_alignments: search window length, unit is 1/2chip;

Num_symbols: coherent integration length (carrying out the symbolic number of coherent integration in time slot);

Derotation_ptr: frequency deviation meter pointer;

Derotation_step: frequency deviation amplitude.

Output:

Accumulation_ptr: coherent integration is output pointer as a result.

Processing procedure is as follows: be unit with 1 symbol (256 chip) at first, use the data among scrambler and the circulation buffer to carry out related operation, again this result is carried out frequency offset correction, each symbol obtains num_alignments related operation result altogether; According to coherent integration length (num_symbols), each frequency pilot sign is carried out addition in the related operation result of same position then, obtain the coherent integration result.At last by pointer accumulation_ptr output coherent integration result.

(2) obtain the PDP value, return the maximum among the PDP simultaneously.

Input:

Num_alignments: search window length, unit is 1/2chip;

Num_accumulations: non-coherent integration length;

Accumulations_ptr: the coherent integration result of input;

Scale_shift: value is 0 to-31;

Profile_in_ptr: the pointer of the PDP that calculates before pointing to.

Output:

Profile_out_ptr:PDP is output pointer as a result.

Return:

Maximum among the max_value:PDP.

Processing procedure is as follows: according to non-coherent integration length (num_accumulations), calculate the quadratic sum of each time slot corresponding to the coherent integration result's of same time delay mould, scale_shift position then moves to right; Last and calculate before PDP value (profile_in_ptr) addition obtains the required PDP value of this Multipath searching, and returns maximum wherein.

(3) if the maximum of PDP (bit represents with the n position) surpasses 16, the n-16 position then all moves to right the PDP value.

(4) select multipath.

Input:

Profile_out_ptr: the pointer that points to PDP;

Num_alignments: search window length, the i.e. number of PDP;

User_id: user ID can obtain parameter relevant with Multipath searching and state information by user ID.

Output:

Path_num: multipath number;

Path_ptr: the pointer that points to multipath.

Processing procedure: at first the PDP to input carries out interframe FIR filtering, and calculating Multipath searching thresholding, then the PDP that surpasses thresholding is selected effective multipath according to certain rule, export the individual multipath of many max_finger_num (the spendable maximum finger number of each user) at last to.

The multipath tracking module is mainly finished multipath tracking, channel estimating, and SIR estimates, functions such as frequency offset estimating.

The multipath tracking process is that EOL (slow early) frequency pilot sign carries out coherent accumulation, calling module is coherent_accumulate, result to coherent accumulation carries out noncoherent accumulation again, and calling module is estimate_power_profile, draws slow road correlation energy in morning.Draw the decision value of multipath tracking at last by module dll_adjust.Respectively these several modules are described below.

The Coherent_accumulate module:

Input: EOL symbol, coherent integration length.

Output: the coherent accumulation result of corresponding each EOL character position.

Processing procedure: input is simply added up, be shown below:

$\mathrm{accu}\left(k\right)=\underset{i=0}{\overset{N-1}{\mathrm{\Σ}}}\mathrm{sym}(k,i),$ k＝0，1，2

In the formula, accu is relevant accumulated result, and accu (0) is the corresponding accumulation result of symbol (early) in advance, and accu (1) is the accumulation result of corresponding current (ontime) symbol, and accu (2) is the corresponding accumulation result that postpones (delay) symbol.Sym is the EOL symbol, and N is a coherent integration length, General N=Npilot, the i.e. figure place of pilot.

Estimate_power_profile：

Input: from the coherent accumulation result of coherent_accumulate function, non-coherent integration length.

Output: slow road correlation energy early.

Processing procedure: the coherent accumulation result from the coherent_accumulate module is carried out incoherent energy stack, be shown below:

$\mathrm{ncoh}\left(k\right)=\underset{i=0}{\overset{M}{\mathrm{\Σ}}}{\left|\mathrm{accu}(k,i)\right|}^2,$ k＝0，1，2

In the formula, ncoh is the non-coherent addition energy, and ncoh (0) is the corresponding energy of (early) symbol in advance, and ncoh (1) is the energy of corresponding current (ontime) symbol, and ncoh (2) is the corresponding energy that postpones (late) symbol.M is a non-coherent integration length, general M=15.

Dll_adjust：

Input: slow road correlation energy early

Output: middle road correlation energy, court verdict.

Processing procedure: the noncoherent accumulation energy that utilizes the estimate_power_profile module to calculate, road, road energy difference normalization late at first early:

$\mathrm{norm}\_\mathrm{eng}=\frac{\mathrm{ncoh}\left[0\right]-\mathrm{ncoh}\left[2\right]}{\mathrm{ncoh}\left[1\right]}$

Then, normalized result and thresholding Th are compared, whether adjust early road, Zhong Lu, the extraction starting point of slow road signal and the direction of adjustment according to result's decision relatively.If | norm_eng|＜Th, the extraction starting point of road signal is exactly the actual position in footpath in then thinking; If norm_eng＜-Th, in then thinking the extraction starting point of road signal early than the actual position in footpath, should with morning road, Zhong Lu, move δ after the extraction starting point of road signal late, extracts new road morning, Zhong Lu, slow road signal; If norm_eng＞Th, the extraction starting point of road signal is later than the actual position in footpath in then thinking, morning road, Zhong Lu, the extraction starting point reach δ of road signal late should be extracted new road morning, Zhong Lu, slow road signal.Th is predefined thresholding, can set by emulation, and tentative at present is 0.3.δ is relevant with the required precision of multipath tracking, and we are made as 1/8 chip.

Channel estimating is at first carried out coherent accumulation to the middle road frequency pilot sign of output, calls coherent_accumulate, then the coherent accumulation result is carried out filtering by one 2 rank iir filter, and call function is filterchannel_gain.Wherein coherent_accumulate is with above-mentioned coherent accumulation module.Below only filterchannel_gain is described.

filterchannel_gain：

Input: the middle road coherent accumulation result of coherent_accumulate module output, filter coefficient;

Output: channel coefficients.

Processing procedure: its time domain iterative computation formula of iir filter that the filter_channel_gain module is used is as follows:

y(n)＝B ₀x(n)+B ₁x(n-1)+B ₂x(n-2)+A ₁y(n-1)+A ₂y(n-2)

List entries x (n) is from the middle road coherent accumulation result of coherent_accumulate module output, and output sequence y (n) carries out the low-pass filtering result of (smoothly) to x (n), is used for referring to the channel correction at peak as channel coefficients.

Frequency offset estimating:

Input: middle road de-spread pilot symbols, frequency pilot sign number.

Output: phase place rotation step-length.

Processing procedure: frequency pilot sign is divided into groups to reduce the influence of noise to result of calculation, frequency pilot sign after the grouping is calculated the real part and the imaginary part of excess phase shift according to the method for multiplication cross, on a time slot, (Npilot-1) individual result is averaged, between time slot, 15 results are carried out filtering then, at last the result who obtains on 15 time slots is looked into the estimated value that the arc tangent table that pre-defines obtains phase deviation between per two symbols, the result is rotated step-length derotation_step divided by the phase place that (2 π/1024) obtain in the frame, next frame data are being separated timing, just data are being carried out frequency correction with the frequency difference information in the global variable.

Multipath merges:

Input: middle road despreading output, channel coefficients, multipath number.

Output: the symbol after multipath merges.

Processing procedure: the symbol that merges each Finger output according to following formula.

$\mathrm{symbolout}\left(i\right)=\frac{\underset{l=1}{\overset{L}{\mathrm{\Σ}}}{\mathrm{rs}}_l\left(i\right)\mathrm{chan}\_\mathrm{gai}{n}_l{\left(i\right)}^{*}}{\underset{l=1}{\overset{L}{\mathrm{\Σ}}}{\left|{\mathrm{chan}\_\mathrm{gain}}_l\left(i\right)\right|}^2}$

In the following formula, L is the Finger number; I is the numbering of symbol, since 1; Symbolout (i) is i symbol after merging; Rs _l(i) be i symbol of l Finger output; Chan_gain _l(i) be the channel coefficients of i symbol correspondence among l the Finger, chan_gain _l(i) ^*Be the conjugation of the channel coefficients of i symbol correspondence among l the Finger, the symbol after being combined carries out saturated cut position to be handled.

Administration module is mainly finished user's search management and multipath management.

Search is managed the final multipath that participates in the demodulation merging of main basis and is determined the original position of search window and the size of search window, and search is managed at each user's postamble and carried out.Can dynamically adjust search window according to the state of Radio Link.

The multipath information that the multipath management mainly utilizes Multipath searching and multipath tracking to report is determined the final multipath that demodulation merges that participates in according to multipath quality quality, and the multipath management is carried out at each user's postamble.If in the multipath management, have Search Results and tracking results to need to handle simultaneously, handle tracking results earlier, output participates in the multipath that demodulation merges; Handle Search Results then, distribute the multipath that participates in tracking.The quality of multipath quality shows as the size of multipath energy.

At each user's postamble, carry out the multipath management earlier, determine that this time slot finally participates in the multipath that demodulation merges, carry out the search management again.

In the present embodiment, the maximum multipath number (being the fingers number) of each user's distribution: 8 (double antenna), the multipath number that Multipath searching reports is 8 (double antennas) to the maximum.

To the processing procedure of Search Results as shown in Figure 2, treatment step is as follows in the multipath management:

Step 1: judge whether the fingers number that the user has distributed is 0, if 0, expression is handled Search Results for the first time, enters step 2, otherwise enters step 3.

Step 2: put active_flg=2, and all multipaths are all distributed;

Step 3: new footpath is judged, if new footpath enters step 4, otherwise enters step 9;

Step 4: judged whether idle finger,, then entered step 5, otherwise enter step 6 if having;

Step 5: this is directly distributed to idle finger, and the changed_flg that puts this finger is " change ";

Step 6: distributing the most weak finger of searching among the fingers;

Step 7: whether judge this footpath energy than the high a certain threshold value of the most weak finger, if, then enter step 8, otherwise end process;

Step 8: directly replace the most weak finger with this, and the changed_flg that puts this finger is " change ";

Step 9: judge whether that multipath is untreated in addition,, then return step 3 if having, otherwise end process.

In the multipath management to the processing procedure of tracking results as shown in Figure 3, the criterion of multipath losing lock (multipath is not participated in merging) is that the energy of multipath is lower than a certain thresholding of ceiling capacity (e.g-10dB) in the same tracking cycle, and the judgment criterion that multipath disappears is that multipath N continuous time (N can adjust) is not participated in merging.The multipath tracking treatment step is as follows:

Step 1: judge whether losing lock of multipath, if losing lock then enters step 2, otherwise enters step 3;

Step 2: the combine_flg that puts this finger is " nonjoinder ";

Step 3: judge whether multipath disappears,, then enter step 4, otherwise enter step 5 if disappear;

Step 4: the valid_flg that puts this finger is an engineering noise, and promptly this finger becomes the free time;

Step 5: judge whether to have distributed multipath to be untreated in addition,, then enter step 6, otherwise return step 1 if having;

Step 6: judge whether needs adjustment of multi-path location according to position relation between tracking results and multipath, then be updated to adjusted position and energy if need to adjust, the processing procedure end.

Should be noted that all any improved methods that does not break away from inventive concept all belong to protection scope of the present invention, the concrete protection range of the present invention is defined by the claims.

Claims (10)

1, a kind ofly utilizes Multipath searching and tracking in the WCDMA base station receiver that DSP realizes, it is characterized in that comprising following functional module: scrambler generation module, Multipath searching module, multipath tracking module, administration module.The Multipath searching module is finished user's Multipath searching and is handled; The multipath tracking module is finished functions such as frequency offset estimating, multipath tracking, functions such as the Multipath searching management that administration module is finished the user and multipath tracking management.

2, method according to claim 1 is characterized in that: the function that the Multipath searching module is finished is to calculate PDP (Power Delay Profile) time delay multipath energy; Detect multipath and report administration module according to PDP.The key step of this module comprises: the scrambler that obtains when utilizing Radio Link to set up carries out related operation to antenna data; According to coherent integration length, the related operation result is carried out coherent integration; According to non-coherent integration length, carry out non-coherent integration then, obtain PDP; Calculate thresholding according to PDP; After energy done further selection greater than the path of thresholding, the multipath information of finally determining (position and the energy in number, each footpath) is reported administration module.

3, method according to claim 1 is characterized in that: the Coherent_accumulate module simply adds up to input in the multipath tracking module, is shown below:

$\mathrm{accu}\left(k\right)=\underset{i=0}{\overset{N-1}{\mathrm{\Σ}}}\mathrm{sym}(k,i)$ ，k＝0，1，2

In the formula, accu is relevant accumulated result, and accu (0) is the corresponding accumulation result of symbol (early) in advance, and accu (1) is the accumulation result of corresponding current (ontime) symbol, and accu (2) is the corresponding accumulation result that postpones (delay) symbol.Sym be EOL early in symbol late, N is a coherent integration length, General N=Npilot, the i.e. figure place of pilot.

4, method according to claim 1 is characterized in that: the Estimate_power_profile module is carried out incoherent energy stack to the coherent accumulation result from the coherent_accumulate module in the multipath tracking module, is shown below:

$\mathrm{ncoh}\left(k\right)=\underset{i=0}{\overset{M}{\mathrm{\Σ}}}{\left|\mathrm{accu}(k,i)\right|}^2,$ k＝0，1，2

In the formula, ncoh is the non-coherent addition energy, and ncoh (0) is the corresponding energy of (early) symbol in advance, and ncoh (1) is the energy of corresponding current (ontime) symbol, and ncoh (2) is the corresponding energy that postpones (late) symbol.M is a non-coherent integration length, general M=15.

5, method according to claim 1 is characterized in that: the Dll_adjust module is utilized the noncoherent accumulation energy that the estimate_power_profile module is calculated in the multipath tracking module, road, road energy difference normalization late at first early:

$\mathrm{norm}\_\mathrm{eng}=\frac{\mathrm{ncoh}\left[0\right]-\mathrm{ncoh}\left[2\right]}{\mathrm{ncoh}\left[1\right]}$

Then, normalized result and thresholding Th are compared, whether adjust early road, Zhong Lu, the extraction starting point of slow road signal and the direction of adjustment according to result's decision relatively.If | norm_eng|＜Th, the extraction starting point of road signal is exactly the actual position in footpath in then thinking; If norm_eng＜-Th, in then thinking the extraction starting point of road signal early than the actual position in footpath, should with morning road, Zhong Lu, move δ after the extraction starting point of road signal late, extracts new road morning, Zhong Lu, slow road signal; If norm_eng＞Th, the extraction starting point of road signal is later than the actual position in footpath in then thinking, morning road, Zhong Lu, the extraction starting point reach δ of road signal late should be extracted new road morning, Zhong Lu, slow road signal.Th is predefined thresholding, can set by emulation, is decided to be 0.3 at present.δ is relevant with the required precision of multipath tracking, and we are made as 1/8 chip.

6, method according to claim 1 is characterized in that: its time domain iterative computation formula of iir filter that the filter_channel_gain module is used in the multipath tracking module is as follows:

y(n)＝B ₀x(n)+B ₁x(n-1)+B ₂x(n-2)+A ₁y(n-1)+A ₂y(n-2)

List entries x (n) is from the middle road coherent accumulation result of coherent_accumulate module output, and output sequence y (n) carries out the low-pass filtering result of (smoothly) to x (n), is used for referring to the channel correction at peak as channel coefficients.

7, method according to claim 1, it is characterized in that: frequency deviation estimating modules divides into groups frequency pilot sign to reduce the influence of noise to result of calculation in the multipath tracking module, frequency pilot sign after the grouping is calculated the real part and the imaginary part of excess phase shift according to the method for multiplication cross, on a time slot, (Npilot-1) individual result is averaged, between time slot, 15 results are carried out filtering then, at last the result who obtains on 15 time slots is looked into the estimated value that the arc tangent table that pre-defines obtains phase deviation between per two symbols, the result is rotated step-length derotation_step divided by the phase place that (2 π/1024) obtain in the frame, next frame data are being separated timing, just data are being carried out frequency correction with the frequency difference information in the global variable.

8, method according to claim 1 is characterized in that: multipath merges module merges each Finger output according to following formula symbol in the multipath tracking module.

$\mathrm{symbolout}\left(i\right)=\frac{\underset{l=1}{\overset{L}{\mathrm{\Σ}}}{\mathrm{rs}}_l\left(i\right)\mathrm{chan}\_\mathrm{gai}{n}_l{\left(i\right)}^{*}}{\underset{l=1}{\overset{L}{\mathrm{\Σ}}}{\left|{\mathrm{chan}\_\mathrm{gain}}_l\left(i\right)\right|}^2}$

In the following formula, L is the Finger number; I is the numbering of symbol, since 1; Symbolout (i) is i symbol after merging; Rs _l(i) be i symbol of l Finger output; Chan_gain _l(i) be the channel coefficients of i symbol correspondence among l the Finger, chan_gain _l(i) ^*Be the conjugation of the channel coefficients of i symbol correspondence among l the Finger, the symbol after being combined carries out saturated cut position to be handled.

9, method according to claim 1 is characterized in that: the processing procedure to Search Results in the multipath management comprises following treatment step:

Step 1: judge whether the fingers number that the user has distributed is 0, if 0, expression is handled Search Results for the first time, enters step 2, otherwise enters step 3.

Step 2: put active_flg=2, and all multipaths are all distributed;

Step 3: new footpath is judged, if new footpath enters step 4, otherwise enters step 9;

Step 4: judged whether idle finger,, then entered step 5, otherwise enter step 6 if having;

Step 5: this is directly distributed to idle finger, and the changed_flg that puts this finger is " change ";

Step 6: distributing the most weak finger of searching among the fingers;

Step 7: whether judge this footpath energy than the high a certain threshold value of the most weak finger, if, then enter step 8, otherwise end process;

Step 8: directly replace the most weak finger with this, and the changed_flg that puts this finger is " change ";

Step 9: judge whether that multipath is untreated in addition,, then return step 3 if having, otherwise end process.

10, method according to claim 1 is characterized in that: the processing procedure to tracking results in the multipath management comprises following treatment step:

Step 1: judge whether losing lock of multipath, if losing lock then enters step 2, otherwise enters step 3;

Step 2: the combine_flg that puts this finger is " nonjoinder ";

Step 3: judge whether multipath disappears,, then enter step 4, otherwise enter step 5 if disappear;

Step 4: the valid_flg that puts this finger is an engineering noise, and promptly this finger becomes the free time;

Step 5: judge whether to have distributed multipath to be untreated in addition,, then enter step 6, otherwise return step 1 if having;

Step 6: judge whether needs adjustment of multi-path location according to position relation between tracking results and multipath, then be updated to adjusted position and energy if need to adjust, the processing procedure end.

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