CN102201821B - A turbo receiver and its realization method - Google Patents

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

A turbo receiver and its realization method

technical field

The present invention relates to the network field, in particular to a Turbo receiver and its realization method.

Background technique

In the GSM (Global System for Mobile Communications, Global System for Mobile Communications) network, in order to improve the signal receiving performance, the Turbo receiver is generally used. Typical services can improve the receiving performance by 0.5-2db, especially for cell border users.

Turbo receiver is a complex system scheduling process, which not only includes the original diversity combining, equalization, and decoding, but also needs to perform equalization and decoding again according to the user's bit error rate last time. For each user, at least 2 iterations are required, which consumes twice the hardware resources and doubles the processing delay, which consumes a lot of money for the system.

In the current general design scheme, the commonly used design structure is shown in Figure 1. In Figure 1, two Turbo receivers are described to realize the Turbo receiver function of two carriers, and each carrier uses a set of Turbo receiver resources. . Among them, in order to realize the function of a Turbo receiver, two sets of balanced demodulation resources (balanced demodulation module 0 and balanced demodulation module 1) and two sets of decoding resources (decoding resource module 0 and decoding resource module 1) are required . After diversity combining, the user information is sent to the equalization demodulation module 0 for demodulation, and then sent to the decoding resource module 0 for decoding. When the decoding fails, the second demodulation and decoding will be performed again through the equalization demodulation module 1 and the decoding resource module 1, and the result of the first decoding will be used in the second demodulation process.

In the process of implementing the present invention, the inventor found that for each user, each carrier has fixed equalized demodulation resources and decoding resources. If another iteration is required, the hardware resources must be doubled again, which consumes a lot of resources. Larger, the cost scale will increase a lot, because equalization and decoding are the parts with the highest complexity and the largest resource consumption in GSM. Since each carrier needs to be processed again, the delay is greatly increased, and the delay of the entire GSM system is increased, and the performance is reduced, but the purpose of improving performance cannot be achieved.

Contents of the invention

Embodiments of the present invention provide a Turbo receiver and its implementation method, so as to improve resource usage efficiency and reduce processing delay.

On the one hand, an embodiment of the present invention provides a Turbo receiver, and the Turbo receiver includes:

The balanced demodulation unit includes at least two balanced demodulation modules, and each balanced demodulation module is used to demodulate the diversity combined signal according to the scheduling of the resource scheduling control unit;

The decoding unit includes at least two decoding modules, each decoding module is used to decode the demodulated signal according to the scheduling of the resource scheduling control unit;

A resource scheduling control unit, configured to call the balanced demodulation module in the balanced demodulation unit to demodulate the signal after diversity combining, and call the decoding module in the decoding unit to decode the demodulated signal code.

On the other hand, the embodiment of the present invention also provides a method for implementing a Turbo receiver, the method comprising:

calling a balanced demodulation module in the balanced demodulation unit to demodulate the signal after the diversity combination, and calling a decoding module in the decoding unit to decode the demodulated signal;

If the first decoding fails, the idle equalization demodulation module in the equalization demodulation unit is called to perform second demodulation, and the idle decoding module in the decoding unit is called to perform second decoding.

Through the Turbo receiver and its implementation method of this embodiment, the original fixed carrier structure is changed to a resource pool structure, the processing capability of each module is fully utilized, and a single resource is time-division multiplexed, only the original set of user resources need to be maintained The scale can support 2 iterations of processing for each user, improving resource usage efficiency and reducing processing delays.

Description of drawings

The drawings described here are used to provide further understanding of the present invention, constitute a part of the application, and do not limit the present invention. In the attached picture:

Fig. 1 is the composition structure diagram of existing Turbo receiver;

Fig. 2 is the composition diagram of the Turbo receiver of the embodiment of the present invention;

FIG. 3 is a schematic diagram of the composition of a Turbo receiver according to another embodiment of the present invention;

FIG. 4 is a schematic diagram of the overall structure of a Turbo receiver according to an embodiment of the present invention;

Fig. 5 is a schematic structural diagram of the balanced demodulation module in the embodiment shown in Fig. 4;

FIG. 6 is a schematic structural diagram of a channel estimation module in the embodiment shown in FIG. 5;

Fig. 7 is a schematic structural diagram of the SISO equalization module in the embodiment shown in Fig. 5;

FIG. 8 is a flowchart of a method for implementing a Turbo receiver according to an embodiment of the present invention;

Fig. 9 is a flowchart of equalized demodulation in the embodiment shown in Fig. 8;

FIG. 10 is a schematic diagram of SISO equalization in the embodiment shown in FIG. 9 .

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the embodiments of the present invention will be further described in detail below in conjunction with the embodiments and the accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.

FIG. 2 is a block diagram of a Turbo receiver provided by an embodiment of the present invention. Referring to FIG. 2, the Turbo receiver includes: an equalized demodulation unit 21, a decoding unit 22, and a resource scheduling control unit 23, wherein:

The equalized demodulation unit 21 includes at least two equalized demodulation modules, and each equalized demodulation module is used to demodulate the diversity combined signal according to the scheduling of the resource scheduling control unit 23 .

The decoding unit 22 includes at least two decoding modules, and each decoding module is configured to decode the demodulated signal according to the scheduling of the resource scheduling control unit 23 .

The resource scheduling control unit 23 is used to call the balanced demodulation module in the balanced demodulation unit 21 to demodulate the signals after diversity combining, and call the decoding module in the decoding unit 22 to demodulate the demodulated signals to decode.

In this embodiment, the number of equalized demodulation modules included in the equalized demodulation unit 21 and the number of decoding modules included in the decoding unit 22 are determined by the number of carriers. In the GSM system time, the unit is burst (burst), and the time of one burst is 0.577ms. Generally, the processing time of the equalization demodulation module and decoding module does not need 0.577ms, which is about 0.577* About 1/3ms, after adopting the resource pool implementation structure of this embodiment, originally needing 4 balanced demodulation modules and 4 decoding modules to realize the turbo receiver of 2 carriers, now only need 2 carrier balanced demodulation modules and 2-carrier decoding module, because one equalization demodulation module can complete two equalization demodulation within one burst time, and one decoding module can complete two decodings within one burst time. Therefore, by using X equalized demodulation modules and X decoding modules, X turbo receiver carriers can be implemented, and within one burst time, there are 2X times of equalized demodulation capabilities and 2X times of decoding capabilities respectively.

The above is just an example. The processing speed of the equalization demodulation module and decoding module depends on the size of the hardware resources. If the time of the equalization accelerator is fast enough, for example, it only takes 1/x time to do an equalization, then only x/2 is needed. Balanced hardware resources.

In this embodiment, the principle of time division multiplexing is used to complete the capability of a set of hardware resources to realize two processings, improve the processing performance of the turbo receiver, and further shorten the processing delay. Supported product application scenarios will also be more and more flexible. Adopting the resource pool architecture that decouples the processing steps allows the product to be scheduled very flexibly and used in different scenarios to maximize resource efficiency.

Fig. 3 is a composition block diagram of an embodiment of a Turbo receiver provided by an embodiment of the present invention. Please refer to Fig. 3. In this embodiment, the Turbo receiver may include an equalized demodulation unit 31, a decoding unit 32, and resource scheduling control unit 33.

In one embodiment, the resource scheduling control unit 33 includes: a judging module 331 and a scheduling module 332, wherein:

The scheduling module 332 is used to call an equalized demodulation module in the balanced demodulation unit 31 to demodulate the information after diversity combining, and call a decoding module in the decoding unit 32 to decode the demodulated information.

When decoding fails for the first time, the judging module 331 is used to judge whether the balanced demodulation module in the balanced demodulation unit 31 and the decoding module in the decoding unit 32 are idle, and the scheduling module 332 then judges according to the judging result of the judging module 331 , call the idle equalization demodulation module for secondary demodulation, and call the idle decoding module for secondary decoding.

In another embodiment, the resource scheduling control unit 33 may further include: an interleaving module 333 and a deinterleaving module 334, wherein:

The interleaving module 333 is used to rearrange the coded bit soft information of the data processed by the decoding module 321 to provide prior information required by the equalized demodulation module 311 for demodulation.

In this embodiment, the interleaving module 333 can reduce bit errors and some burst errors that may occur during transmission by rearranging coded bit soft information, after equalization demodulation, deinterleaving and decoding. Its function is the same as that of the interleaving module of the turbo receiver in the prior art, and will not be repeated here.

The deinterleaving module 334 is used to restore the data processed by the equalization demodulation module 311 to obtain the original coded data, and provide it to the decoding module 321 for decoding.

In this embodiment, the function of the deinterleaving module 334 is the same as the function of the deinterleaving module of the turbo receiver in the prior art, and will not be repeated here.

The Turbo receiver of this embodiment changes the original fixed carrier structure into a resource pool structure, fully utilizes the processing capability of each module, time-division multiplexes a single resource, and maintains the resource scale of the original set of users to support each user 2 Iterative processing improves resource usage efficiency and reduces processing delays.

In this embodiment, the equalized demodulation unit 31 also includes at least two equalized demodulation modules 311, and the equalized demodulation module 311 is compatible with supporting the first equalized demodulation and the second equalized demodulation of the Turbo receiver, and can Realized by the structure shown in FIG. 5, please refer to FIG. 5, the equalized demodulation module 311 may include: a channel estimation module 51, a preprocessing module 52 and a SISO equalization module 53, wherein:

The channel estimation module 51 is used to use the real-time training sequence value to track the channel factor during the first demodulation according to the demodulation selection information output by the resource scheduling control unit 33, and use the decoded training sequence value to track the channel factor during the second demodulation. The hard judgment value corresponding to the feedback prior information is used for channel factor tracking.

In a specific implementation manner, as shown in FIG. 6 , the channel estimation module 51 may include a selection configuration register 61 and a channel estimator 62, wherein: the selection configuration register 61 is used to output according to the resource scheduling control unit 33 The demodulation selection information, when demodulating for the first time, selects the real-time training sequence value and provides to the channel estimator 62 to carry out channel factor tracking, and according to the demodulation selection information output by the resource scheduling control unit 33, in the second demodulation When , the hard decision value corresponding to the prior information fed back by the decoding module is selected and provided to the channel estimator 62 for channel factor tracking. The channel estimator 62 is used to use the value selected by the selection configuration register 61, such as the real-time training sequence value or the hard decision value corresponding to the prior information fed back by the decoding module, to perform channel factor tracking.

The preprocessing module 52 is configured to filter the diversity combined signal according to the result of channel factor tracking by the channel estimation module 51, obtain the filtered signal and the channel factor matched with the filtered signal, and filter the filtered signal The signal and the channel factor matched with the filtered signal are output to the SISO equalization module 53 to complete the equalization.

In this embodiment, the function of the preprocessing module 52 is basically the same as that of the preprocessing (Prefilter) module in the prior art, and will not be repeated here.

SISO (Soft In Soft Out, soft input soft output) equalization module 53 is used for according to the a priori information of decoding module feedback and the channel factor that matches the signal after described preprocessing module 52 input and described filtering The filtered signal input by the pre-processing module 52 is demodulated, and the demodulation result is sent to the de-interleaving module 334 for processing.

In this embodiment, the function of the SISO equalizer module 53 is the same as that of the SISO equalizer module in the prior art, and will not be repeated here.

In this embodiment, as shown in FIG. 7 , the SISO equalization module 53 may include a calculation submodule 71 , a selection submodule 72 and a SISO equalization submodule 73 . in:

The calculation sub-module 71 is used to calculate the prior information value corresponding to each symbol according to the prior information fed back by the decoding module, so that the SISO equalization sub-module 73 performs SISO equalization, where each symbol refers to the value corresponding to each prior information an encoded value.

The selection submodule 72 is used for demodulation selection information output by the resource scheduling control unit 23. When demodulating for the first time, select 0 to provide to the SISO equalization submodule 73 for SISO equalization; The prior information value calculated by the calculation sub-module 72 is provided to the SISO equalization sub-module 73 for SISO equalization.

The SISO equalization sub-module 73 is configured to decipher the filtered signal input by the pre-processing module 52 according to the selection result of the selection sub-module 72 and the channel factor matched with the filtered signal input by the pre-processing module 52 and send the demodulation result to the deinterleaving module 334 for processing.

In this embodiment, the decoding unit 32 may also include at least two decoding modules 321 , and the decoding modules 321 may perform decoding through methods in the prior art, which will not be repeated here.

It can be seen that, according to the demodulation selection information output by the resource scheduling control unit, the Turbo receiver of this embodiment selects the real-time training sequence value and provides it to the channel estimator 62 for channel factor tracking during the first demodulation, and according to the resource scheduling The demodulation selection information output by the control unit, in the second demodulation, selects the hard decision value corresponding to the prior information fed back by the decoding module and provides it to the channel estimator 62 for channel factor tracking, so that an equalized demodulation module can Compatible with two demodulations, it greatly improves the performance of Turbo receiver users without increasing resources. Compared with the common solution, the resources are reduced by nearly half. Compared with the original solution, the processing delay is also shorter, and the resource pool structure is greatly improved. Improved flexibility, suitable for different application scenarios.

In order to make the Turbo receiver of this embodiment clearer and easier to understand, the Turbo receiver of this embodiment will be described in detail below with reference to the schematic diagram of the overall structure of the Turbo receiver.

FIG. 4 is a schematic diagram of the overall structure of the Turbo receiver of this embodiment. Please refer to Fig. 4, the Turbo receiver of this embodiment changes the structure of the original fixed carrier into the structure of the resource pool, and puts all the balanced demodulation modules 411 together as the balanced demodulation resource pool 41. The scheduling control unit 43 performs the function of equalizing demodulation. Similarly, the Turbo receiver puts all the decoding modules 421 together in the form of a decoding resource pool 42 , and performs the decoding function according to the scheduling of the resource scheduling control unit 43 .

In this embodiment, taking a turbo receiver with two carriers as an example, two sets of balanced demodulation resources, that is, two resource demodulation modules 411 are used to form a balanced demodulation resource pool 41, and two sets of decoding resources, that is, Two decoding modules 421 form a decoding resource pool 42 . Wherein, the scheduling of the two resource pools is unifiedly implemented by the resource scheduling control unit 43 . When the information of a carrier is sent to the balanced demodulation resource pool 41 when diversity combining is completed, the resource scheduling control unit 43 selects a balanced demodulation module 411 to complete the demodulation, and the resource scheduling control unit 43 also selects a decoding module 421 for decoding code. When the decoding fails, a second equalization demodulation is required. The resource scheduling control unit 43 will select one of the equalization demodulation modules 411 for demodulation according to whether it is idle at this time, and then select the idle decoding module 421 for secondary decoding based on the same principle. This completes a complete Turbo receiver process.

In this embodiment, the function of the balanced demodulation module 411 is the same as that of the balanced demodulation module 311 of the embodiment shown in FIG. The functions are the same, and the function of the resource scheduling control unit 43 is the same as that of the resource scheduling control unit 33 in the embodiment shown in FIG. .

The Turbo receiver of this embodiment can be compatible with two demodulations by balancing the demodulation resource pool and the decoding resource pool. In the case of no increase in resources, the performance of the Turbo receiver user is greatly improved. Compared with the common solution, Resources are reduced by nearly half. Compared with the original solution, the processing delay is also shorter, and the resource pool architecture greatly improves flexibility and is suitable for different application scenarios.

FIG. 8 is a flow chart of a method for implementing a Turbo receiver provided by an embodiment of the present invention. Referring to FIG. 8, the method includes:

801: call an equalized demodulation module in the balanced demodulation unit to demodulate the signal after diversity combining, and call a decoding module in the decoding unit to decode the demodulated signal;

802: If the first decoding fails, call an idle equalization demodulation module in the equalization demodulation unit to perform second demodulation, and call an idle decoding module in the decoding unit to perform second decoding.

In this embodiment, if the decoding fails for the first time, it is first judged whether the balanced demodulation module in the balanced demodulation unit is idle, and whether the decoding module in the decoding unit is idle. And, according to the judgment result, the idle equalization demodulation module is called to perform secondary demodulation, and the idle decoding module is called to perform secondary decoding.

In this embodiment, the balanced demodulation module demodulates the signal after the diversity combination, which can be realized by the method shown in Figure 9, including the following steps:

901: According to the demodulation selection information, during the first demodulation, use the real-time training sequence value to track the channel factor; or, during the second demodulation, use the hard judgment corresponding to the prior information that has been decoded and fed back value for channel factor tracking;

902: Filter the diversity-combined signal according to the channel factor tracking result, to obtain a filtered signal and a channel factor matching the filtered signal;

903: Demodulate the filtered signal according to the prior information fed back by the decoding module and the channel factor that matches the filtered signal.

In this embodiment, demodulation of the filtered signal is performed according to the prior information fed back by the decoding module and the channel factor matched with the filtered signal, which may be implemented by the method shown in FIG. 10 , Include the following steps:

101: Calculate the prior information value corresponding to each symbol according to the prior information fed back by decoding;

102: According to the demodulation selection information, during the first demodulation, select 0 and a channel factor that matches the filtered signal to demodulate the filtered signal; during the second demodulation, The filtered signal is demodulated by selecting the prior information value and the channel factor matching the filtered signal.

Wherein, select 0 and the channel factor that matches the filtered signal to demodulate the filtered signal, that is, no prior information for decoding feedback has been generated, and SISO equalization is only based on the preprocessed channel factor Demodulate the preprocessed signal; select the prior information value and the channel factor that matches the filtered signal to demodulate the filtered signal, that is, the prior information that has generated decoding feedback information, and the SISO equalizer demodulates the preprocessed signal according to the prior information value and the preprocessed channel factor.

In this embodiment, decoding the demodulated information by the decoding module may be implemented by means of the prior art, and details are not repeated here.

In this embodiment, in order to correct the bit errors and some burst errors that may occur in the data processed by the decoding module, the data output by the decoding module can be interleaved first, and after rearranging the data, it can be used as a decoding feedback The prior information is output to the SISO equalization module for SISO equalization, and the data after SISO equalization is restored through deinterleaving processing, and provided to the decoding module for the next decoding.

Each step of the method in the embodiment of the present invention can be realized by the constituent units of the Turbo receiver in the foregoing embodiments. Since the Turbo receiver has been described in detail in the foregoing embodiments, details will not be repeated here.

To sum up, through the method of this embodiment, resources (including equalized demodulation resources and decoding resources) can be used reasonably. Change the original fixed carrier structure to a resource pool structure, make full use of the processing capacity of each module, time-division multiplex a single resource, and only need to maintain the resource scale of the original set of users to support each user's 2 iterations of processing. Moreover, the processing capability of a single module is fully utilized, different resources are scheduled at different times, resource usage efficiency is improved, and processing delay is not increased. In addition, based on the respective resource pool architecture after decoupling the processing steps, the product can be scheduled very flexibly for different scenarios, maximize resource efficiency, and flexibly support different scenarios. Reduced implementation costs.

Those skilled in the art can understand that the drawing is only a schematic diagram of a preferred embodiment, and the modules or processes in the drawing are not necessarily necessary for implementing the present invention.

Those skilled in the art can understand that the modules in the device in the embodiment can be distributed in the device in the embodiment according to the description in the embodiment, and can also be changed and located in one or more devices different from the embodiment. The modules in the above embodiments can be combined into one module, and can also be further split into multiple sub-modules.

The serial numbers of the above embodiments of the present invention are for description only, and do not represent the advantages and disadvantages of the embodiments.

Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be implemented through computer programs to instruct related hardware, and the programs can be stored in a computer-readable storage medium. During execution, it may include the processes of the embodiments of the above-mentioned methods. Wherein, the storage medium may be a magnetic disk, an optical disk, a read-only memory (Read-Only Memory, ROM) or a random access memory (Random Access Memory, RAM), etc.

The specific embodiments described above have further described the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above descriptions are only specific embodiments of the present invention and are not intended to limit the scope of the present invention. Protection scope, within the spirit and principles of the present invention, any modification, equivalent replacement, improvement, etc., shall be included in the protection scope of the present invention.

Claims (10)

1. A Turbo receiver, characterized in that, the Turbo receiver comprises: The balanced demodulation unit includes at least two balanced demodulation modules, and each balanced demodulation module is used to demodulate the diversity combined signal according to the scheduling of the resource scheduling control unit; The decoding unit includes at least two decoding modules, each decoding module is used to decode the demodulated signal according to the scheduling of the resource scheduling control unit; A resource scheduling control unit, configured to call the balanced demodulation module in the balanced demodulation unit to demodulate the signal after diversity combining, and call the decoding module in the decoding unit to decode the demodulated signal code. 2. The Turbo receiver according to claim 1, wherein the resource scheduling control unit comprises: A judging module, configured to judge whether the equalization demodulation module and the decoding module are idle when the first decoding fails; The scheduling module is used to call an idle equalization demodulation module to perform secondary demodulation and an idle decoding module to perform secondary decoding according to the determination result of the determination module. 3. The Turbo receiver according to claim 2, wherein the resource scheduling control unit further comprises: An interleaving module, configured to rearrange the encoded bit soft information of the data processed by the decoding module, so as to provide prior information required for demodulation by the equalized demodulation module; The deinterleaving module is used to restore the data processed by the equalization demodulation module to obtain the original coded data, and provide it to the decoding module for decoding. 4. Turbo receiver according to claim 2, is characterized in that, described equalization demodulation module comprises: The channel estimation module is used to use the real-time training sequence value to track the channel factor during the first demodulation according to the demodulation selection information output by the resource scheduling control unit, and use the translated training sequence value to track the channel factor during the second demodulation. The hard judgment value corresponding to the prior information of the code feedback is used to track the channel factor; A preprocessing module, configured to filter the diversity-combined signal according to the result of channel factor tracking by the channel estimation module, to obtain a filtered signal and a channel factor matching the filtered signal; A soft input and soft output SISO equalization module, configured to filter the input of the preprocessing module according to the prior information fed back by the decoding module and the channel factor input by the preprocessing module that matches the filtered signal The subsequent signal is demodulated. 5. Turbo receiver according to claim 4, is characterized in that, described channel estimation module comprises: The selection configuration register is used to select and output the real-time training sequence value during the first demodulation according to the demodulation selection information output by the resource scheduling control unit; during the second demodulation, select and output the decoded module The hard judgment value corresponding to the feedback prior information; The channel estimator is configured to use the real-time training sequence value selected by the selection configuration register or the hard decision value corresponding to the prior information fed back by the decoding module to perform channel factor tracking. 6. Turbo receiver according to claim 4, is characterized in that, described SISO equalization module comprises: The calculation sub-module is used to calculate the prior information value corresponding to each symbol according to the prior information fed back by the decoding module, wherein each symbol is an encoding value corresponding to each prior information; The selection sub-module is used to select and output 0 during the first demodulation according to the demodulation selection information output by the resource scheduling control unit; during the second demodulation, select and output the previous value calculated by the calculation sub-module. test information value; The SISO equalization sub-module is configured to decompose the filtered signal input by the pre-processing module according to the value selected by the selection sub-module and the channel factor input by the pre-processing module that matches the filtered signal Tune. 7. an implementation method of Turbo receiver, it is characterized in that, described method comprises: calling a balanced demodulation module in the balanced demodulation unit to demodulate the signal after the diversity combination, and calling a decoding module in the decoding unit to decode the demodulated signal; If the first decoding fails, the idle equalization demodulation module in the equalization demodulation unit is called to perform second demodulation, and the idle decoding module in the decoding unit is called to perform second decoding. 8. The method according to claim 7, wherein if the decoding fails for the first time, the idle equalization demodulation module in the equalization demodulation unit is called to carry out secondary demodulation, and the idle equalization demodulation module in the decoding unit is called to perform second demodulation. The decoding module for secondary decoding includes: Judging whether the balanced demodulation module in the balanced demodulation unit is idle, judging whether the decoding module in the decoding unit is idle; and According to the judgment result, the idle equalization demodulation module is called to perform secondary demodulation, and the idle decoding module is called to perform secondary decoding. 9. The method according to claim 7, wherein the equalized demodulation module demodulates the diversity combined signal, comprising: According to the demodulation selection information, in the first demodulation, use the real-time training sequence value to track the channel factor; or, in the second demodulation, use the hard judgment value corresponding to the prior information that has been decoded and fed back. channel factor tracking; Filtering the diversity-combined signal according to the channel factor tracking result, to obtain a filtered signal and a channel factor matching the filtered signal; The filtered signal is demodulated according to the prior information fed back by the decoding module and the channel factor matched with the filtered signal. 10. The method according to claim 9, wherein the filtered signal is demodulated according to the prior information fed back by the decoding module and the channel factor matched with the filtered signal, include: calculating a prior information value corresponding to each symbol according to the prior information fed back by the decoding module, wherein each symbol is an encoding value corresponding to each prior information; According to the demodulation selection information, when demodulating for the first time, select 0 and a channel factor that matches the filtered signal to demodulate the filtered signal; The filtered signal is demodulated using the prior information value and the channel factor matched with the filtered signal.

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