CN102201821A - Turbo receiver and implementation method thereof - Google Patents
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Abstract
The embodiment of the invention provides a Turbo receiver and an implementation method thereof. The Turbo receiver comprises a balanced demodulation unit, a coding unit and a resource scheduling control unit, wherein the balanced demodulation unit comprises at least two balanced demodulation modules, and each balanced demodulation module is used for demodulating diversity combined signals in accordance with the scheduling of the resource scheduling control unit; the coding unit comprises at least two coding modules, and each coding module is used for coding the demodulated signals in accordance with the scheduling of the resource scheduling control unit; and the resource scheduling control unit is used for scheduling the balanced demodulation modules in the balanced demodulation unit to demodulate the diversity combined signals and scheduling the coding modules in the coding unit to code the demodulated signals. The Turbo receiver and the implementation method thereof are utilized to improve the use efficiency of resources and decrease the processing delay.
Description
Technical field
The present invention relates to network field, relate in particular to a kind of Turbo receiver and its implementation.
Background technology
At GSM (Global System for Mobile Communications, global system for mobile communications) in the network, in order to improve signal receiving performance, generally adopt the mode of Turbo receiver, typical services can promote the receptivity of 0.5～2db, especially improves a lot for cell boundary users.
The Turbo receiver is the system call process of a complexity, not only will comprise original diversity merging, balanced, decoding, also needs the error rate according to preceding once this user, carries out once balanced and decoding again.All need at least 2 iterative processings for each user, need to consume the hardware resource of twice, and processing delay doubles, big for system consumption.
In at present general design, generally the project organization of Cai Yonging has been described two Turbo receivers as shown in Figure 1 among Fig. 1, realizes the Turbo receiver function of two carrier waves, and a carrier wave is respectively with a cover Turbo receiver resources.Wherein, in order to realize the function of a Turbo receiver, need two cover equalizing demodulation resources (equalizing demodulation module 0 and equalizing demodulation module 1) and two cover decode resources (decode resources module 0 and decode resources module 1).User profile is given equalizing demodulation module 0 and is carried out a demodulation, and then pass to decode resources module 0 and decipher after merging through diversity.Behind decoding failure, can carry out again separating the second time by equalizing demodulation module 1 and decode resources module 1 and be in harmonious proportion decoding, in second time demodulating process, can use the result of decoding for the first time.
The inventor finds in realizing process of the present invention, for each user, each carrier wave is the equalizing demodulation resource and the decode resources of fixing, iteration once more if desired, the hardware resource that must double again then consumes very greatly, and the cost scale all increases much, because balanced and decoding be exactly among the GSM complexity the highest, the resource consumption the best part.Because each carrier wave all needs to handle one time again, cause postponing to increase greatly, make whole gsm system postpone to strengthen, performance descends to some extent, can't reach the purpose of improving performance on the contrary.
Summary of the invention
The embodiment of the invention provides a kind of Turbo receiver and its implementation, to improve resource utilization, reduces processing delay.
On the one hand, the embodiment of the invention provides a kind of Turbo receiver, and described Turbo receiver comprises:
The equalizing demodulation unit comprises at least two equalizing demodulation modules, and each equalizing demodulation module is used for the scheduling according to the scheduling of resource control unit, and the signal after diversity is merged carries out demodulation;
Decoding unit comprises at least two decoding modules, and each decoding module is used for the scheduling according to the scheduling of resource control unit, and the signal after the demodulation is deciphered;
The scheduling of resource control unit, the signal after the equalizing demodulation module that is used for calling described equalizing demodulation unit merges diversity carries out demodulation, and calls decoding module in the described decoding unit signal after to demodulation and decipher.
On the other hand, the embodiment of the invention also provides a kind of implementation method of Turbo receiver, and described method comprises:
Signal after calling an equalizing demodulation module in the equalizing demodulation unit diversity being merged carries out demodulation, and calls a decoding module in the decoding unit signal after to demodulation and decipher;
If decoding failure then calls equalizing demodulation module idle in the equalizing demodulation unit and carries out secondary demodulation for the first time, and call decoding module idle in the decoding unit and carry out secondary decoding.
Turbo receiver and its implementation by present embodiment, make the structure of original fixed carrier into the resource pool structure, make full use of the disposal ability of each module, the resource that time division multiplexing is single, only need to keep original one resource extent that overlaps the user can support the processing of 2 iteration of each user, improve resource utilization, reduced processing delay.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, does not constitute limitation of the invention.In the accompanying drawings:
Fig. 1 is the composition structural representation of existing Turbo receiver;
Fig. 2 is the composition schematic diagram of the Turbo receiver of the embodiment of the invention;
Fig. 3 is the composition schematic diagram of the Turbo receiver of another embodiment of the present invention;
Fig. 4 is the overall structure schematic diagram of the Turbo receiver of one embodiment of the invention;
Fig. 5 is the structural representation of middle equalizing demodulation module embodiment illustrated in fig. 4;
Fig. 6 is the structural representation of middle channel estimation module embodiment illustrated in fig. 5;
Fig. 7 is the structural representation of middle SISO balance module embodiment illustrated in fig. 5;
Fig. 8 is the flow chart of implementation method of the Turbo receiver of the embodiment of the invention;
Fig. 9 is a middle equalizing demodulation flow chart embodiment illustrated in fig. 8;
Figure 10 is the balanced schematic diagram of middle SISO embodiment illustrated in fig. 9.
Embodiment
For the purpose, technical scheme and the advantage that make the embodiment of the invention is clearer,, the embodiment of the invention is described in further details below in conjunction with embodiment and accompanying drawing.At this, illustrative examples of the present invention and explanation thereof are used to explain the present invention, but not as a limitation of the invention.
The composition frame chart of a kind of Turbo receiver that Fig. 2 provides for the embodiment of the invention please refer to Fig. 2, and this Turbo receiver comprises: equalizing demodulation unit 21, decoding unit 22 and scheduling of resource control unit 23, wherein:
Equalizing demodulation unit 21 comprises at least two equalizing demodulation modules, and each equalizing demodulation module is used for the scheduling according to scheduling of resource control unit 23, and the signal after diversity is merged carries out demodulation.
Signal after the equalizing demodulation module that scheduling of resource control unit 23 is used for calling described equalizing demodulation unit 21 merges diversity carries out demodulation, and calls decoding module in the described decoding unit 22 signal after to demodulation and decipher.
In the present embodiment, the number of the equalizing demodulation module that equalizing demodulation unit 21 is comprised, and the number of the decoding module that comprised of decoding unit 22 is decided by carrier number.In the system time of GSM, with burst (burst) is unit, the time of 1 burst is 0.577ms, the processing time of general equilibrium demodulation module and decoding module is can not need 0.577ms, greatly about about 0.577*1/3ms, after adopting this resource pool implementation structure of present embodiment, originally needed 4 equalizing demodulation modules and 4 decoding modules to realize the Turbo receiver of 2 carrier waves, the decoding module that only needs 2 carrier wave equalizing demodulation modules and 2 carrier waves at present, because an equalizing demodulation module can be finished equalizing demodulation 2 times at 1 burst in the time, a decoding module can be finished 2 decoding at 1 burst in the time.Therefore, adopt X equalizing demodulation module and X decoding module, then can realize X Turbo receiver carrier wave, in the time, 2X time equalizing demodulation ability and 2X time decoding ability are arranged respectively altogether at a burst.
Below just illustrate, the processing speed of equalizing demodulation module and decoding module depends on the size of hardware resource, if the time of balanced accelerator is enough fast, such as doing once balanced as long as the time of 1/x has so just only needed the balanced hardware resource of x/2.
Present embodiment utilizes time-multiplexed principle to finish the ability that a cover hardware resource is realized twice processing, has improved the handling property of turbo receiver, has further shortened processing delay.The product application scenarios of supporting also can be more, and flexibility is bigger.Adopt thisly product is dispatched very neatly the uncoupled resource pool separately of treatment step framework, be used for differently scene, bring into play resource efficiency to greatest extent.
The composition frame chart of an execution mode of the Turbo receiver that Fig. 3 provides for the embodiment of the invention please refer to Fig. 3, and in the present embodiment, this Turbo receiver can comprise equalizing demodulation unit 31, decoding unit 32 and scheduling of resource control unit 33.
In one embodiment, scheduling of resource control unit 33 comprises: judge module 331 and scheduler module 332, wherein:
Information after the equalizing demodulation module that scheduler module 332 is used for calling equalizing demodulation unit 31 merges diversity is carried out demodulation, and calls a decoding module in the decoding unit 32 information after to demodulation and decipher.
In first time during decoding failure, judge module 331 is used for judging whether the equalizing demodulation module of equalizing demodulation unit 31 and the decoding module in the decoding unit 32 be idle, 332 judged results of scheduler module according to judge module 331, call idle equalizing demodulation module and carry out secondary demodulation, and call idle decoding module and carry out secondary decoding.
In another embodiment, scheduling of resource control unit 33 can also comprise: interleaving block 333 and de-interleaving block 334, wherein:
Interleaving block 333 is used for the soft information of coded-bit of the data after decoding module 321 processing is rearranged, and carries out the prior information that demodulation needs so that equalizing demodulation module 311 to be provided.
In the present embodiment, this interleaving block 333 utilizes to be reset the soft information of coded-bit, through after equalizing demodulation, deinterleaving and the decoding, can reduce bit error and some burst errors that may occur in transmission course.Its function is identical with the function of the interleaving block of the Turbo receiver of prior art, does not repeat them here.
Data after de-interleaving block 334 is used for equalizing demodulation module 311 handled are reduced, and obtaining data behind the original coding, and offer decoding module 321 and decipher.
In the present embodiment, the function of this de-interleaving block 334 is identical with the function of the de-interleaving block of the Turbo receiver of prior art, does not repeat them here.
The Turbo receiver of present embodiment makes the structure of original fixed carrier into the resource pool structure, make full use of the disposal ability of each module, the resource that time division multiplexing is single, keep original one resource extent that overlaps the user can support the processing of 2 iteration of each user, improve resource utilization, reduced processing delay.
In the present embodiment, equalizing demodulation unit 31 also comprises at least two equalizing demodulation modules 311, this equalizing demodulation module 311 can compatible be supported the equalizing demodulation and the equalizing demodulation for the second time first time of Turbo receiver, can realize by structure shown in Figure 5, please refer to Fig. 5, this equalizing demodulation module 311 can comprise: channel estimation module 51, pretreatment module 52 and SISO balance module 53, wherein:
Channel estimation module 51 is used for selecting information according to the demodulation of scheduling of resource control unit 33 outputs, separating for the first time timing, utilizing real-time training sequence value to carry out channel factors follows the tracks of, separating for the second time timing, value of declaring firmly of utilizing process to decipher the prior information correspondence of feedback is carried out channel factors and is followed the tracks of.
In a kind of embodiment, as shown in Figure 6, this channel estimation module 51 can comprise that one is selected configuration register 61 and a channel estimator 62, wherein: this selection configuration register 61 is used for selecting information according to the demodulation of scheduling of resource control unit 33 outputs, separating for the first time timing, select real-time training sequence value to offer channel estimator 62 and carry out the channel factors tracking, and select information according to the demodulation of scheduling of resource control unit 33 output, separating for the second time timing, value of declaring firmly of the prior information correspondence of selection process decoding module feedback offers channel estimator 62 and carries out the channel factors tracking.Channel estimator 62 is used to utilize the value of selecting configuration register 61 to select, and value of declaring firmly of the prior information correspondence of for example real-time training sequence value or decoding module feedback is carried out channel factors and followed the tracks of.
Signal after the result that pretreatment module 52 is used for following the tracks of according to 51 pairs of channel factors of channel estimation module merges described diversity carries out filtering, the channel factors that obtains filtered signal and be complementary with this filtered signal, and output to SISO balance module 53 with filtered signal with channel factors that this filtered signal is complementary, to finish equilibrium.
In the present embodiment, the function of preliminary treatment in the function of this pretreatment module 52 and the prior art (Prefilter) module is basic identical, does not repeat them here.
SISO (Soft In Soft Out, soft inputting and soft output) balance module 53 is used for according to the channel factors that are complementary with described filtered signal of the prior information of decoding module feedback and 52 inputs of described pretreatment module the filtered signal of described pretreatment module 52 inputs being carried out demodulation, and demodulation result is sent to de-interleaving block 334 handles.
In the present embodiment, the function of this SISO balance module 53 is identical with the function of SISO equilibrium (SISO equalizer) module in the prior art, does not repeat them here.
In the present embodiment, as shown in Figure 7, this SISO balance module 53 can comprise the balanced submodule 73 of calculating sub module 71, chooser module 72 and SISO.Wherein:
Calculating sub module 71 is used for calculating according to the prior information of decoding module feedback the prior information value of each symbol correspondence, so that the balanced submodule 73 of SISO carries out the SISO equilibrium, each symbol here is meant an encoded radio of each prior information correspondence.
Chooser module 72 is used for selecting information according to the demodulation of scheduling of resource control unit 23 outputs, is separating timing for the first time, and selection 0 offers the balanced submodule 73 of SISO and carries out the SISO equilibrium; For the second time separating timing, the prior information value of selecting described calculating sub module 72 to calculate offers the balanced submodule 73 of SISO and carries out the SISO equilibrium.
The balanced submodule 73 of SISO, be used for the filtered signal of described pretreatment module 52 inputs being carried out demodulation, and demodulation result is sent to de-interleaving block 334 handle according to the channel factors that are complementary with described filtered signal of the selection result of chooser module 72 and pretreatment module 52 inputs.
In the present embodiment, decoding unit 32 also can comprise at least two decoding modules 321, and this decoding module 321 can be deciphered by the method for prior art, does not repeat them here.
As seen, the Turbo receiver of present embodiment is selected information according to the demodulation of scheduling of resource control unit output, separating for the first time timing, select real-time training sequence value to offer channel estimator 62 and carry out the channel factors tracking, and select information according to the demodulation of scheduling of resource control unit output, separating for the second time timing, value of declaring firmly of the prior information correspondence of selection process decoding module feedback offers channel estimator 62 and carries out the channel factors tracking, make that an equalizing demodulation module can compatible twice demodulation, under the situation that resource does not increase, improved Turbo receiver user's performance greatly, compared common scheme, a resource shrinkage nearly half, compare former scheme, processing delay is also shorter, and the resource pool framework improved flexibility greatly, is applicable to different application scenarioss.
Clear more understandable for the Turbo receiver that makes present embodiment, below in conjunction with the overall structure schematic diagram of Turbo receiver, the Turbo receiver of present embodiment is elaborated.
Fig. 4 is the overall structure schematic diagram of the Turbo receiver of present embodiment.Please refer to Fig. 4, the Turbo receiver of present embodiment is the structure that the structure of original fixed carrier has been made into resource pool, all equalizing demodulation modules 411 are put together as the form existence of equalizing demodulation resource pool 41, carry out the function of equalizing demodulation according to the scheduling of scheduling of resource control unit 43.Same, the form that this Turbo receiver puts all decoding modules 421 as decode resources pond 42 together exists, the function of deciphering according to the scheduling of scheduling of resource control unit 43.
In the present embodiment, be that the Turbo receiver with two carrier waves is an example, with two cover equalizing demodulation resources, also promptly two resource demodulation modules 411 are formed equalizing demodulation resource pools 41, two cover decode resources, and also promptly two decoding modules 421 are formed decode resources ponds 42.Wherein, the scheduling unification of these two resource pools is realized by scheduling of resource control unit 43.When giving equalizing demodulation resource pool 41 when diversity merges the information of finishing a carrier wave, scheduling of resource control unit 43 selects an equalizing demodulation module 411 to finish demodulation, and scheduling of resource control unit 43 also can select a decoding module 421 to decipher.When decoding failure, need carry out the equalizing demodulation second time.Whether scheduling of resource control unit 43 can idlely select one of them to carry out demodulation according to equalizing demodulation module 411 this moment, carries out the secondary decoding of selecting idle decoding module 421 to carry out according to identical principle then.Finish a complete Turbo receiver process like this.
In the present embodiment, equalizing demodulation module 411 is identical with the function of equalizing demodulation module 311 embodiment illustrated in fig. 3, decoding module 421 is identical with the function of the decoding module 321 of decoding unit 32 embodiment illustrated in fig. 3, scheduling of resource control unit 43 is identical with the function of scheduling of resource control unit 33 embodiment illustrated in fig. 3, because in the embodiment shown in fig. 3, each module is had been described in detail, do not repeat them here.
The mode of the Turbo receiver of present embodiment by equalizing demodulation resource pool and decode resources pond can compatible twice demodulation, under the situation that resource does not increase, improved Turbo receiver user's performance greatly, compare common scheme, a resource shrinkage nearly half, compare former scheme, processing delay is also shorter, and the resource pool framework has improved flexibility greatly, is applicable to different application scenarioss.
The flow chart of the implementation method of a kind of Turbo receiver that Fig. 8 provides for the embodiment of the invention please refer to Fig. 8, and this method comprises:
801: the signal after calling an equalizing demodulation module in the equalizing demodulation unit diversity being merged carries out demodulation, and calls a decoding module in the decoding unit signal after to demodulation and decipher;
802: if decoding failure for the first time then calls equalizing demodulation module idle in the equalizing demodulation unit and carries out secondary demodulation, and calls decoding module idle in the decoding unit and carry out secondary decoding.
In the present embodiment, if decoding failure for the first time judges at first then whether the equalizing demodulation module in the equalizing demodulation unit is idle, judge the decoding module free time whether in the decoding unit.And, according to judged result, call idle equalizing demodulation module and carry out secondary demodulation, and call idle decoding module and carry out secondary decoding.
In the present embodiment, the signal after the equalizing demodulation module merges diversity carries out demodulation, can realize by method shown in Figure 9, may further comprise the steps:
901: select information according to demodulation, separating timing for the first time, utilize real-time training sequence value to carry out channel factors and follow the tracks of; Perhaps, separating timing for the second time, value of declaring firmly of utilizing process to decipher the prior information correspondence of feedback is carried out channel factors and is followed the tracks of;
902: the signal after the result who follows the tracks of according to channel factors merges described diversity carries out filtering, the channel factors that obtains filtered signal and be complementary with this filtered signal;
903: described filtered signal is carried out demodulation according to the prior information of decoding module feedback with the channel factors that described filtered signal is complementary.
In the present embodiment, described filtered signal is carried out demodulation, can realize, may further comprise the steps by method shown in Figure 10 according to the prior information of decoding module feedback with the channel factors that described filtered signal is complementary:
101: the prior information value of calculating each symbol correspondence according to the prior information of decoding feedback;
102: select information according to demodulation, separating timing for the first time, select 0 and described filtered signal is carried out demodulation with the channel factors that described filtered signal is complementary; Separating timing for the second time, select described prior information value and described filtered signal is carried out demodulation with the channel factors that described filtered signal is complementary.
Wherein, select 0 and described filtered signal is carried out demodulation with the channel factors that described filtered signal is complementary, promptly also do not produce the prior information of decoding feedback, the SISO equilibrium is only carried out demodulation according to pretreated channel factors to pretreated signal; Select described prior information value and described filtered signal is carried out demodulation with the channel factors that described filtered signal is complementary, promptly produced the prior information of decoding feedback, the SISO equilibrium is carried out demodulation according to this prior information value and pretreated channel factors to pretreated signal.
In the present embodiment, the information of decoding module after to demodulation is deciphered and can be realized by the means of prior art, does not repeat them here.
In the present embodiment, bit error and some burst errors that may occur for the data after correcting decoding module and handling, the data of decoding module output can be passed through interleaving treatment earlier, after these data are rearranged, output to the SISO balance module as the prior information of deciphering feedback and carry out the SISO equilibrium, data after the SISO equilibrium finishes are handled by deinterleaving and are carried out reduction of data, and offer decoding module and decipher next time.
Each step of the method for the embodiment of the invention can be by previous embodiment the component units of Turbo receiver realize because in the aforementioned embodiment, this Turbo receiver is had been described in detail, do not repeat them here.
In sum, by the method for present embodiment, make resource (comprising equalizing demodulation resource and decode resources) be able to reasonable utilization.Make the structure of original fixed carrier into the resource pool structure, make full use of the disposal ability of each module, the resource that time division multiplexing is single only needs to keep original one resource extent that overlaps the user can support the processing of 2 iteration of each user.And, having made full use of the disposal ability of individual module, the different resource of scheduling has improved resource utilization in different, guarantees that processing delay does not increase yet.In addition, the framework of resource pool separately based on the treatment step de is later can make product dispatch very neatly, is used for different scenes, has brought into play resource efficiency to greatest extent, and has supported different scenes flexibly.Reduced the cost of realizing.
It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, module in the accompanying drawing or flow process might not be that enforcement the present invention is necessary.
It will be appreciated by those skilled in the art that the module in the device among the embodiment can be distributed in the device of embodiment according to the embodiment description, also can carry out respective change and be arranged in the one or more devices that are different from present embodiment.The module of the foregoing description can be merged into a module, also can further split into a plurality of submodules.
The invention described above embodiment sequence number is not represented the quality of embodiment just to description.
One of ordinary skill in the art will appreciate that all or part of flow process that realizes in the foregoing description method, be to instruct relevant hardware to finish by computer program, described program can be stored in the computer read/write memory medium, this program can comprise the flow process as the embodiment of above-mentioned each side method when carrying out.Wherein, described storage medium can be magnetic disc, CD, read-only storage memory body (Read-Only Memory, ROM) or at random store memory body (Random Access Memory, RAM) etc.
Above-described specific embodiment; purpose of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the above only is specific embodiments of the invention; and be not intended to limit the scope of the invention; within the spirit and principles in the present invention all, any modification of being made, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a Turbo receiver is characterized in that, described Turbo receiver comprises:
The equalizing demodulation unit comprises at least two equalizing demodulation modules, and each equalizing demodulation module is used for the scheduling according to the scheduling of resource control unit, and the signal after diversity is merged carries out demodulation;
Decoding unit comprises at least two decoding modules, and each decoding module is used for the scheduling according to the scheduling of resource control unit, and the signal after the demodulation is deciphered;
The scheduling of resource control unit, the signal after the equalizing demodulation module that is used for calling described equalizing demodulation unit merges diversity carries out demodulation, and calls decoding module in the described decoding unit signal after to demodulation and decipher.
2. Turbo receiver according to claim 1 is characterized in that, described scheduling of resource control unit comprises:
Judge module is used for judging in first time during decoding failure whether described equalizing demodulation module and described decoding module be idle;
Scheduler module is used for the judged result according to described judge module, calls idle equalizing demodulation module and carries out secondary demodulation, and call idle decoding module and carry out secondary decoding.
3. Turbo receiver according to claim 2 is characterized in that, described scheduling of resource control unit also comprises:
Interleaving block is used for the soft information of coded-bit of the data after the described decoding module processing is rearranged, and carries out the prior information that demodulation needs so that described equalizing demodulation module to be provided;
De-interleaving block is used for the data after the described equalizing demodulation resume module are reduced, and obtaining data behind the original coding, and offers described decoding module and deciphers.
4. Turbo receiver according to claim 2 is characterized in that, described equalizing demodulation module comprises:
Channel estimation module, be used for selecting information according to the demodulation of described scheduling of resource control unit output, separating for the first time timing, utilizing real-time training sequence value to carry out channel factors follows the tracks of, separating for the second time timing, value of declaring firmly of utilizing process to decipher the prior information correspondence of feedback is carried out channel factors and is followed the tracks of;
Pretreatment module, the signal after being used for according to the result that described channel estimation module is followed the tracks of channel factors described diversity being merged carries out filtering, the channel factors that obtains filtered signal and be complementary with this filtered signal;
Soft inputting and soft output SISO balance module is used for according to the channel factors that is complementary with described filtered signal of the prior information of described decoding module feedback and the input of described pretreatment module the filtered signal of described pretreatment module input being carried out demodulation.
5. Turbo receiver according to claim 4 is characterized in that, described channel estimation module comprises:
Select configuration register, be used for selecting information,, select and export real-time training sequence value separating timing for the first time according to the demodulation of scheduling of resource control unit output; Separate for the second time timing, selecting and exporting value of declaring firmly of the prior information correspondence of feeding back through decoding module;
Channel estimator is used to utilize the real-time training sequence value of described selection configuration register selection or value of declaring firmly of the prior information correspondence that decoding module feeds back to carry out the channel factors tracking.
6. Turbo receiver according to claim 4 is characterized in that, described SISO balance module comprises:
Calculating sub module is used for calculating according to the prior information of decoding module feedback the prior information value of each symbol correspondence;
The chooser module is used for selecting information according to the demodulation of scheduling of resource control unit output, is separating timing for the first time, selects and exports 0; For the second time separate timing, selecting and exporting the prior information value that described calculating sub module is calculated;
The balanced submodule of SISO, the channel factors that is complementary with described filtered signal that is used for the value selected according to described chooser module and the input of described pretreatment module is carried out demodulation to the filtered signal of described pretreatment module input.
7. the implementation method of a Turbo receiver is characterized in that, described method comprises:
Signal after calling an equalizing demodulation module in the equalizing demodulation unit diversity being merged carries out demodulation, and calls a decoding module in the decoding unit signal after to demodulation and decipher;
If decoding failure then calls equalizing demodulation module idle in the equalizing demodulation unit and carries out secondary demodulation for the first time, and call decoding module idle in the decoding unit and carry out secondary decoding.
8. method according to claim 7 is characterized in that, if decoding failure for the first time describedly calls equalizing demodulation module idle in the equalizing demodulation unit and carries out secondary demodulation, and calls decoding module idle in the decoding unit and carries out secondary decoding and comprise:
Judge whether the equalizing demodulation module in the equalizing demodulation unit is idle, judge whether the decoding module in the decoding unit is idle; And
According to judged result, call idle equalizing demodulation module and carry out secondary demodulation, and call idle decoding module and carry out secondary decoding.
9. method according to claim 7 is characterized in that, the signal after described equalizing demodulation module merges diversity carries out demodulation, comprising:
Select information according to demodulation, separating timing for the first time, utilize real-time training sequence value to carry out channel factors and follow the tracks of; Perhaps, separating timing for the second time, value of declaring firmly of utilizing process to decipher the prior information correspondence of feedback is carried out channel factors and is followed the tracks of;
Signal after the result who follows the tracks of according to channel factors merges described diversity carries out filtering, the channel factors that obtains filtered signal and be complementary with this filtered signal;
According to the prior information of decoding module feedback with the channel factors that described filtered signal is complementary described filtered signal is carried out demodulation.
10. method according to claim 9 is characterized in that, describedly according to the prior information of decoding module feedback with the channel factors that described filtered signal is complementary described filtered signal is carried out demodulation, comprising:
Calculate the prior information value of each symbol correspondence according to the prior information of decoding module feedback;
Select information according to demodulation, separating timing for the first time, select 0 and described filtered signal is carried out demodulation with the channel factors that described filtered signal is complementary; Separating timing for the second time, select described prior information value and described filtered signal is carried out demodulation with the channel factors that described filtered signal is complementary.
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| CN104202271A (en) * | 2014-09-02 | 2014-12-10 | 江苏理工学院 | Per-survivor processing based iterative equalization method applied to direct-sequence spread-spectrum communication |
| CN104202271B (en) * | 2014-09-02 | 2018-04-13 | 江苏理工学院 | Based on the iteration equalizing method handled by survivor path in Direct Sequence Spread Spectrum Communication |
| CN104883329A (en) * | 2015-06-17 | 2015-09-02 | 北京华力创通科技股份有限公司 | Method and device for channel estimation and equalization of receiving end in satellite communication |
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