CN102355329B - data channel reconstruction device and method - Google Patents
data channel reconstruction device and method Download PDFInfo
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Abstract
The invention discloses a kind of data channel reconstruction device and method, and in said apparatus, including data channel reconfiguration unit, data channel reconfiguration unit include：Recodification module, for being recoded to data channel signal；Data channel amplitude offset estimation module, for obtaining amplitude offset estimate of the data channel signal relative to control channel data；Data channel reconstructed module, for being reconstructed according to the data channel signal after amplitude offset estimate and recodification.By the present invention, the channel estimation value that reached directly can still be obtained after to data channel signal equilibrium treatment using control channel is reconstructed, to eliminate the effect disturbed between multipath, more code channels and multi-user.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of data channel reconstruction device and method.
Background technology
In code division multiple access system, intersymbol interference (Inter-Symbol caused by multipath and wireless channel distortion
Interference, referred to as ISI) it result in the non-orthogonal of intersymbol so that the interference between multipath, more code channels and multi-user
As a common problem in wireless communication system, this intersymbol interference limits power system capacity.In order to eliminate multiple access
The influence of interference, interference elimination method are suggested.The thought of this method is that it is carried out using known code channel information
Reconstruct, is then removed it from reception signal, seems that interference reduces so as to reach from other users or code channel, signal to noise ratio carries
High purpose.Reconstruct and Interference Cancellation to channel need to use channel-estimation information.For the system using Rake receiver
For, the channel estimation value that directly can be obtained using user's control channel is reconstructed；But for equalization receivers user
For, because balanced device corrects and compensate for a certain extent system performance, reduce intersymbol interference, therefore now believe
Road estimate has been no longer able to really reflect the characteristic of channel.However, with the further raising of message transmission rate, its footpath
Between, the interference between code channel gradually increases, and in order to improve the accuracy of data channel decoding, needs to use equilibrium treatment again.But no
By being to use chip-level equalizer or symbolization level equaliser, because balanced device has been corrected and compensated to a certain extent
System performance, reduces intersymbol interference, now channel estimation value has been no longer able to really reflect the characteristic of channel.
The content of the invention
For, when the data channel signal Jing Guo equilibrium treatment is reconstructed, can not directly utilize control in correlation technique
The problem of channel estimation value that channel processed obtains, the present invention provides a kind of data channel reconstruction device and method, above-mentioned to solve
Problem.
A kind of according to an aspect of the invention, there is provided data channel reconstruction device.
Included according to the data channel reconstruction device of the present invention：Data channel reconfiguration unit, the data channel reconfiguration unit
Including：Recodification module, for being recoded to data channel signal；Data channel amplitude offset estimation module, for obtaining
Take amplitude offset estimate of the data channel signal relative to control channel data；Data channel reconstructed module, for according to width
Data channel signal after degree bias estimation value and recodification is reconstructed.
Above-mentioned data channel amplitude offset estimation module includes：First receiving submodule, come from data letter for receiving
The data channel signal and equaliser weights of road processing unit；Second receiving submodule, for receiving the data letter after recoding
Track data；3rd receiving submodule, come from control channel processing unit using pilot tone set in advance with passing through for receiving
The channel estimation value that the control channel data of its descrambling and de-spreading processing obtains；Acquisition submodule, for using the data received
It is relative that data channel is calculated in data channel signal and channel estimation value after channel data, equaliser weights, recodification
In the amplitude offset value of control channel.
Said apparatus also includes：Base band data storage element and Interference Cancellation unit；Interference Cancellation unit, for will be original
Base band data performs phase reducing with the data after data channel reconstructs, and it is concurrent to obtain the base band data after Interference Cancellation
Send；Base band data memory cell, for receiving and storing not by the raw baseband data and Interference Cancellation of Interference Cancellation
Base band data afterwards.
Said apparatus also includes：Data channel processing unit and control channel processing unit；Data channel processing unit bag
Include：Chip-level equalizer, for carrying out equilibrium treatment to raw baseband data in chip-level, while it is concurrent to be equalized device weight
Send；Data channel descrambling and de-spreading module, for receiving the data channel signal Jing Guo chip-level equalizer equilibrium treatment, enter line number
It is believed that road descrambling and de-spreading is handled and sent；Transmission channel demultiplexing module, pass through data channel descrambling and de-spreading module for receiving
The data channel signal of processing, carry out solution Cyclic Redundancy Code and handle and send；Control channel processing unit includes：Control channel solution
Despreading module is disturbed, for receiving raw baseband data and carrying out control channel descrambling and de-spreading processing；Channel estimation module, for root
The control channel data and known pilot handled according to the control channel descrambling and de-spreading module descrambling and de-spreading of acquisition obtains channel estimation
Value.
Said apparatus includes：Data channel processing unit and control channel processing unit；Data channel processing unit includes：
Data channel descrambling and de-spreading module, for receiving raw baseband data, carry out the processing of data channel descrambling and de-spreading and send；Symbol
Level equaliser, for receiving the data channel signal Jing Guo data channel descrambling and de-spreading resume module, in symbol level to by solving
The data channel signal for disturbing despreading processing carries out equilibrium treatment and sent, while is equalized device weight and sends；Transmission channel
Demultiplexing module, for receiving the data channel signal after equilibrium treatment, carry out solution Cyclic Redundancy Code and handle and send；Control
Channel bank processed includes：Control channel descrambling and de-spreading module, for receiving raw baseband data, it is controlled channel descrambling
Despreading is handled and sent；Channel estimation module, the control channel for the control channel descrambling and de-spreading resume module according to acquisition
Data and known pilot obtain channel estimation value.
According to another aspect of the present invention, there is provided a kind of data channel reconstructing method.
Included according to the data channel reconstructing method of the present invention：Data channel signal is recoded；Obtain data letter
Track data relative to control channel data amplitude offset estimate；Using the data channel signal after recodification, amplitude offset
The channel estimation value of estimate and control channel carries out data channel reconstruct.
The data of above-mentioned acquisition data channel transmission relative to the data of control channel transmission amplitude offset estimate bag
Include：Data channel reconfiguration unit receives the data channel signal and equaliser weights for coming from data channel processing unit；Data
Channel reconstruction unit receives the data channel signal after recoding；Data channel reconfiguration unit, which receives, comes from control channel processing
The channel estimation value that unit is obtained using pilot tone set in advance with the control channel data by the processing of its descrambling and de-spreading；Data
Channel reconstruction unit uses the data channel signal and letter after the data channel signal, equaliser weights, recodification received
Amplitude offset value of the data channel relative to control channel is calculated in road estimate.
Above-mentioned data channel reconfiguration unit utilizes the number after the data channel signal, equaliser weights, recodification received
Include it is believed that data channel is calculated in track data and channel estimation value relative to the amplitude offset value of control channel：Data are believed
Road reconfiguration unit is calculated using the data channel signal after the data channel signal, equaliser weights and recodification received
To the range value of data channel signal；Data channel reconfiguration unit is worth to the amplitude of control channel data using channel estimation
Value；The amplitude of the range value of data channel divided by control channel is worth to amplitude offset estimate by data channel reconfiguration unit.
The channel estimation of data channel signal, amplitude offset estimate and control channel after using above-mentioned recodification
After value carries out data channel reconstruct, in addition to：Raw baseband data and the data after data channel reconstructs are performed into phase
Reducing, obtain the base band data after Interference Cancellation.
When the balanced device that above-mentioned data channel processing unit includes is chip-level equalizer, enter to data channel signal
Before row is recoded, in addition to：Equilibrium treatment is carried out to raw baseband data in chip-level；By the data after equilibrium treatment
Channel data carries out descrambling and de-spreading processing；Data channel signal after descrambling and de-spreading is handled is transmitted channel demultiplexing
Processing；Determine that data channel signal solution CRC is correct.
When the balanced device that above-mentioned data channel processing unit includes is symbol level equaliser, enter to data channel signal
Before row is recoded, in addition to：Descrambling and de-spreading processing is carried out to raw baseband data；In symbol level to being handled by descrambling and de-spreading
Data channel signal afterwards carries out equilibrium treatment；Data channel signal after equilibrium treatment is transmitted channel demultiplexing
Processing；Determine that data channel signal solution CRC is correct.
By the present invention, the amplitude offset estimate according to the data channel signal got relative to control channel data
It is reconstructed, is solved in correlation technique to the data channel number Jing Guo equilibrium treatment with the data channel signal after recodification
During according to being reconstructed, the problem of the channel estimation value that directly can not be obtained using control channel, and then in logarithm it is believed that
The channel estimation value that directly can be still obtained using control channel after track data equilibrium treatment is reconstructed, to eliminate multipath, more
The effect disturbed between code channel and multi-user.
Brief description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, forms the part of the application, this hair
Bright schematic description and description is used to explain the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the structured flowchart of data channel reconstruction device according to embodiments of the present invention；
Fig. 2 is the structured flowchart of data channel reconstruction device according to the preferred embodiment of the invention；
Fig. 3 is that the structure of the data channel reconstruction device according to the preferred embodiment of the invention comprising chip-level equalizer is shown
It is intended to；
Fig. 4 is that the structure of the data channel reconstruction device according to the preferred embodiment of the invention comprising symbol level equaliser is shown
It is intended to；
Fig. 5 is the flow chart of data channel reconstructing method according to embodiments of the present invention；
Fig. 6 is the detail flowchart that data channel reconstructing method according to embodiments of the present invention eliminates interference；
Fig. 7 is the data channel reconstructing method that the balanced device included according to embodiments of the present invention is chip-level equalizer
Flow chart；
Fig. 8 is the data channel reconstructing method that the balanced device included according to embodiments of the present invention is symbol level equaliser
Flow chart.
Embodiment
Describe the present invention in detail below with reference to accompanying drawing and in conjunction with the embodiments.It should be noted that do not conflicting
In the case of, the feature in embodiment and embodiment in the application can be mutually combined.
Fig. 1 is the structured flowchart of data channel reconstruction device according to embodiments of the present invention.Wherein, data of the invention letter
Road reconstruct device includes：Data channel reconfiguration unit 10；As shown in figure 1, data channel reconfiguration unit 10 further comprises：Rearrange
Code module 102, for being recoded to data channel signal；Data channel amplitude offset estimation module 104, with recodification mould
Block 102 is connected, for obtaining amplitude offset estimate of the data channel signal relative to control channel data；Data channel weight
Structure module 106, it is connected respectively with recodification module 102 and data channel amplitude offset estimation module 104, for according to amplitude
Data channel signal after bias estimation value and recodification is reconstructed.
In correlation technique, when to being reconstructed by balanced channel, the letter that directly can not be obtained using control channel
The problem of road estimate.In the data channel reconstruction device shown in Fig. 1, recodification module 102 is carried out to data channel signal
Recode；It is inclined relative to the amplitude of control channel data that data channel amplitude offset estimation module 104 obtains data channel signal
Move estimate；Data channel reconstructed module 106 is according to the data channel signal after recodification, amplitude offset estimate and control
The channel estimation value of channel carries out data channel reconstruct, solves in correlation technique to the data channel number Jing Guo equilibrium treatment
During according to being reconstructed, the problem of the channel estimation value that directly can not be obtained using control channel, and then in logarithm it is believed that
The channel estimation value that directly can be still obtained using control channel after track data equilibrium treatment is reconstructed, to eliminate multipath, more
The effect disturbed between code channel and multi-user.
Preferably, as shown in Fig. 2 above-mentioned data channel amplitude offset estimation module 104 may further include：First connects
Submodule 1042 is received, the data channel signal and equaliser weights of data channel processing unit are come from for receiving；Second connects
Submodule 1044 is received, for receiving the data channel signal after recoding；3rd receiving submodule 1046, come from for receiving
The letter that control channel processing unit is obtained using pilot tone set in advance with the control channel data by the processing of its descrambling and de-spreading
Road estimate；Acquisition submodule 1048, for using the number after the data channel signal, equaliser weights, recodification received
It is believed that amplitude offset value of the data channel relative to control channel is calculated in track data and channel estimation value.
During being preferable to carry out, the working method of above-mentioned acquisition submodule 1048 is as follows：Utilize the number received
It is believed that data channel signal is calculated in the data channel signal after track data, the equaliser weights and the recodification
Range value；The range value of control channel data is worth to using the channel estimation；By the range value of the data channel divided by
The amplitude of the control channel is worth to the amplitude offset estimate.
Preferably, as shown in Fig. 2 said apparatus can also include：Interference Cancellation unit 20 and base band data storage element
30；Wherein, Interference Cancellation unit 20, it is connected with data channel reconfiguration unit 10, for raw baseband data and number will to be passed through
Phase reducing is performed according to the data after channel reconstruction, obtains the base band data after Interference Cancellation and transmission.Base band data storage is single
Member 30, be connected with Interference Cancellation unit 20, for receive and store not pass through Interference Cancellation raw baseband data and
Base band data after Interference Cancellation.
Preferably, as shown in Fig. 2 said apparatus can also include：Data channel processing unit 40 and control channel processing
Unit 50, wherein, data channel processing unit 40 and control channel processing unit 50 respectively with the phase of data channel reconfiguration unit 10
Connection.
Wherein, data channel processing unit 40 may further include：Chip-level equalizer, in chip-level to original
Base band data carries out equilibrium treatment, while is equalized device weight and sends；Data channel descrambling and de-spreading module, passed through for receiving
The data channel signal of the chip-level equalizer equilibrium treatment is crossed, the processing of data channel descrambling and de-spreading is carried out and sends；
Transmission channel demultiplexing module, for receiving the data channel number Jing Guo the data channel descrambling and de-spreading resume module
According to, carry out solve Cyclic Redundancy Code handle and send；The control channel processing unit 50 may further include：Control channel solution
Despreading module is disturbed, for receiving raw baseband data and carrying out control channel descrambling and de-spreading processing；Channel estimation module, for root
The control channel data and known pilot handled according to the control channel descrambling and de-spreading module descrambling and de-spreading of acquisition obtains
Channel estimation value.
Above-mentioned preferred embodiment is further described below in conjunction with Fig. 3.
Fig. 3 is that the structure of the data channel reconstruction device according to the preferred embodiment of the invention comprising chip-level equalizer is shown
It is intended to.As shown in figure 3, above-mentioned data channel reconstruction device further comprises that data channel processing unit, control channel processing are single
Member and data channel reconfiguration unit, wherein, above-mentioned data channel processing unit further comprises：Chip-level equalizer, for
Chip-level carries out equilibrium treatment to raw baseband data, while is equalized device weight and sends；Data channel descrambling and de-spreading mould
Block, for receiving the data channel signal Jing Guo chip-level equalizer equilibrium treatment, carry out the processing of data channel descrambling and de-spreading simultaneously
Send；Transmission channel demultiplexing module, for receiving the data channel signal Jing Guo data channel descrambling and de-spreading resume module, enter
Row solution Cyclic Redundancy Code is handled and sent.Above-mentioned control channel processing unit further comprises：Control channel descrambling and de-spreading module,
For receiving raw baseband data and carrying out control channel descrambling and de-spreading processing；Channel estimation module, for the control according to acquisition
The control channel data and known pilot of channel descrambling and de-spreading module descrambling and de-spreading processing processed obtain channel estimation value.Data channel
Reconfiguration unit may refer to above-mentioned Fig. 1 and Fig. 2 description, and here is omitted.
Wherein, above-mentioned data channel processing unit 40 can further include：Chip-level equalizer, in chip-level
Equilibrium treatment is carried out to raw baseband data, while is equalized device weight and sends；Data channel descrambling and de-spreading module, is used for
The data channel signal Jing Guo the chip-level equalizer equilibrium treatment is received, carries out the processing of data channel descrambling and de-spreading simultaneously
Send；Transmission channel demultiplexing module, for receiving the data letter Jing Guo the data channel descrambling and de-spreading resume module
Track data, carry out solution Cyclic Redundancy Code and handle and send；The control channel processing unit 50 may further include：Control letter
Road descrambling and de-spreading module, for receiving raw baseband data and carrying out control channel descrambling and de-spreading processing；Channel estimation module, use
In the control channel data and known pilot that are handled according to the control channel descrambling and de-spreading module descrambling and de-spreading of acquisition
Obtain channel estimation value.
Above-mentioned preferred embodiment is further described below in conjunction with Fig. 4.
Fig. 4 is that the structure of the data channel reconstruction device according to the preferred embodiment of the invention comprising symbol level equaliser is shown
It is intended to.As shown in figure 4, above-mentioned data channel reconstruction device further comprises that data channel processing unit, control channel processing are single
Member and data channel reconfiguration unit, wherein, above-mentioned data channel processing unit further comprises：Data channel descrambling and de-spreading mould
Block, for receiving raw baseband data, carry out the processing of data channel descrambling and de-spreading and send；Symbol level equaliser, for receiving
By the data channel signal of data channel descrambling and de-spreading resume module, the data by descrambling and de-spreading processing are believed in symbol level
Track data carries out equilibrium treatment and sent, while is equalized device weight and sends；Transmission channel demultiplexing module, for receiving
Data channel signal after equilibrium treatment, carry out solution Cyclic Redundancy Code and handle and send；Above-mentioned control channel processing unit
Further comprise：Control channel descrambling and de-spreading module, for receiving raw baseband data, it is controlled the processing of channel descrambling and de-spreading
And send；Channel estimation module, the control channel data and for the control channel descrambling and de-spreading resume module according to acquisition
Know that pilot tone obtains channel estimation value.Data channel reconfiguration unit may refer to above-mentioned Fig. 1 and Fig. 2 description, and here is omitted.
As can be seen here, the balanced device that above-mentioned data channel reconstruction device includes can be chip-level equalizer, or
Symbol level equaliser, certainly it should be noted that the data channel reconstruction device comprising other balanced devices is also protected in the present invention
Within the scope of.
In order to which the present invention is more clearly understood, the preferred working method for each entity mentioned below to Fig. 3 and Fig. 4 is entered
Row further describes.
Chip-level equalizer, chip-level equalizer use this module.For from base band data memory cell input data,
Chip-level to data channel carry out equilibrium treatment because using the weight with balanced device be it is corrected and compensate, institute
Can be reduced intersymbol interference.
Data channel descrambling and de-spreading module and control channel descrambling and de-spreading module, for being solved to the data of its respective channels
Disturb despreading processing.Wherein, data channel descrambling and de-spreading module, during using chip-level equalizer, number is inputted from chip-level equalizer
According to progress data channel descrambling and de-spreading processing.During using symbol level equaliser, from base band data memory cell input data, enter
The processing of row data channel descrambling and de-spreading.Control channel descrambling and de-spreading module, from base band data memory cell input data, controlled
Channel descrambling and de-spreading processing processed.
Symbol level equaliser, symbol level equaliser use this module.For from descrambling and de-spreading module input data, in symbol
Level to data channel carry out equilibrium treatment because using the weight with balanced device be it is corrected and compensate, can
To reduce intersymbol interference.
Transmission channel demultiplexing module, chip-level equalizer is from data channel descrambling and de-spreading module input data, symbol level
Balanced device is from symbol level equaliser input data.The demodulation of data channel is completed, is deinterleaved, solves rate-matched, Turbo is translated
Code, solution Cyclic Redundancy Code (Cyclic Redundancy Code, referred to as CRC) processing；The correct data of CRC check are believed
Road, can be reconfigured and interference cancellation operation.To the user of crc error without reconstruct.
Channel estimation module, for from control channel descrambling and de-spreading module input data, channel to be carried out using control channel
Estimation operation.Using control channel descrambling and de-spreading data, and known pilot, channel estimation value is obtained.
Recodification module, for the result using data channel CRC check, data channel is recompiled, then
Using the data recompiled, data channel is reconstructed.
Data channel amplitude offset estimation module, it is inclined relative to the amplitude of control channel that this module is used for estimated data channel
Move information.When data are reconstructed, effective solution method is to use the channel estimation value based on control channel, should
Channel estimation value contains the transmission power information of control channel in itself, but the transmission power of data channel and control channel
Transmission power is compared, and is usually constructed with certain skew.Therefore, in order to accurately data-signal is reconstructed, it is necessary to control
The channel estimation value of channel is adjusted.The effect of this module is that this.The method of estimation of this module is to utilize control channel
Information obtain the amplitude information of control channel；Data channel is obtained using the information and equaliser weights W of data channel
Amplitude information；Then the amplitude information for the control channel that the amplitude information of the data channel obtained with estimation divided by estimation obtain,
So as to obtain amplitude offset value of the data channel relative to control channel.
Data channel reconstructed module, it is relative using channel estimation value, the data channel signal after recompiling, data channel
Data channel is reconstructed amplitude offset value, frequency offseting value and the multipath phase information of control channel.
Above-mentioned data channel reconstruction device provided in an embodiment of the present invention, after to data channel signal equilibrium treatment still
The channel estimation value that directly can be obtained using control channel is reconstructed, and can be eliminated between multipath, more code channels and multi-user
The effect of interference.
Fig. 5 is the flow chart of data channel reconstructing method according to embodiments of the present invention.As shown in figure 5, this method includes
Handle below：
Step S502：Data channel signal is recoded；
Step S504：Obtain amplitude offset estimate of the data channel signal relative to control channel data；
Step S506：Using the channel of the data channel signal after recodification, amplitude offset estimate and control channel
Estimate carries out data channel reconstruct.
In correlation technique, when to being reconstructed by balanced channel, the letter that directly can not be obtained using control channel
The problem of road estimate.In the data channel reconstructing method shown in Fig. 5, recoded using to data channel signal；Obtain
Take amplitude offset estimate of the data channel signal relative to control channel data；According to the data channel signal after recodification,
The channel estimation value of amplitude offset estimate and control channel carries out data channel reconstruct, solves in correlation technique to warp
When crossing the data channel signal of equilibrium treatment and being reconstructed, the channel estimation value that directly can not be obtained using control channel is asked
Topic, and then the channel estimation value that directly can still be obtained after to data channel signal equilibrium treatment using control channel
It is reconstructed, to eliminate the effect disturbed between multipath, more code channels and multi-user.
Preferably, the data of above-mentioned acquisition data channel transmission are estimated relative to the amplitude offset of the data of control channel transmission
Evaluation further comprises handling as follows：
(1) data channel reconfiguration unit receives the data channel signal for coming from data channel processing unit and balanced device power
Weight；
(2) data channel reconfiguration unit receives the data channel signal after recoding；
(3) data channel reconfiguration unit, which receives, comes from control channel processing unit using pilot tone set in advance with passing through
The channel estimation value that the control channel data of its descrambling and de-spreading processing obtains；
(4) data channel reconfiguration unit uses the data after the data channel signal, equaliser weights, recodification received
Amplitude offset value of the data channel relative to control channel is calculated in channel data and channel estimation value.
Preferably, above-mentioned data channel reconfiguration unit utilizes the data channel signal, equaliser weights, recodification received
Data channel signal and channel estimation value afterwards is calculated data channel and enters one relative to the amplitude offset value of control channel
Step includes following processing：
(1) after data channel reconfiguration unit is using the data channel signal, equaliser weights and recodification received
The range value of data channel signal is calculated in data channel signal；
(2) data channel reconfiguration unit is worth to the range value of control channel data using channel estimation；
(3) amplitude of the range value of data channel divided by control channel is worth to amplitude offset by data channel reconfiguration unit
Estimate.
Preferably, in the channel using the data channel signal after recoding, amplitude offset estimate and control channel
After estimate carries out data channel reconstruct, in addition to following processing：By raw baseband data and after data channel reconstructs
Data perform phase reducing, obtain the base band data after Interference Cancellation.
Above-mentioned preferred embodiment is described below in conjunction with Fig. 6.
Fig. 6 is the detail flowchart that data channel reconstructing method according to embodiments of the present invention eliminates interference.Such as Fig. 6 institutes
Show, this method includes following processing：
Step S602：Carry out normal descrambling and de-spreading to data channel signal, equilibrium treatment (chip-level or symbol level) and
Transmission channel demultiplexing process；
Step S604：To data channel signal solution CRC check, if CRC check is correct, step S606 is performed, otherwise,
Go to step S614；
Step S606：Coding is re-started to data channel signal；
Step S608：Data channel is estimated relative to the amplitude offset of control channel data, method of estimation is as follows：
For data channel, the signal after descrambling and de-spreading and equilibrium is：
Formula one：Rd=WHSd·βd·SFd
Wherein w is the weight of balanced device, and H is real channel, SdFor originally transmitted data, βdFor amplitude offset, SFd
For data channel spreading code.
Using formula one, the amplitude of data channel is calculated using the method for depolarization,
Formula two：
[]*To grip processing altogether
For control channel, the signal after descrambling and de-spreading is：
Formula three：Rc=HSc·βc·SFc
Wherein H is real channel, ScFor originally transmitted data, βcFor amplitude offset, SFcFor control channel spreading code.
Wherein ScFor given data, have using formula three
Formula four：
For the channel estimation value being calculated using control channel.
By formula two and formula four, amplitude offset of the data channel relative to control channel can be obtainedFor：
Formula five：
Step S610：It is inclined relative to the amplitude of control channel using the channel estimation value based on control channel, data channel
Data channel signal is reconstructed data channel signal, frequency offset estimate f, the multipath phase information move, recompiled；
Step S612：Obtained data are reconstructed to carry out in Interference Cancellation module with the initial data in base band memory cell
Subtract each other processing, then send base band memory cell back to again.
Step S614：Data channel signal is not reconstructed.
When the balanced device that data channel processing unit includes is different type balanced device, above-mentioned data channel reconstructing method
Difference be present in the step of being related to.It is chip-level equalizer and symbol level equaliser to balanced device below in conjunction with two preferred embodiments
It is described respectively.Certainly, when balanced device is other kinds of balanced device, the data channel reconstructing method being related to is in this hair
Within bright protection domain.
Fig. 7 is the data channel reconstructing method that the balanced device included according to embodiments of the present invention is chip-level equalizer
Flow chart.As shown in fig. 7, this method specifically includes following processing：
Step S702：The descrambling and de-spreading processing of channel is controlled to real-time base band data；
Step S704：Carried out using the descrambling and de-spreading data of the obtained control channel of known pilot frequency information and step S702
Channel estimation, export channel estimation value；
Step S706：Chip-level equalisation is carried out using with step S702 identical Real-time Basebands data；
Step S708：Output to step S706 carries out descrambling and the despreading processing of data channel；
Step S710：Channel demultiplexing is transmitted to the data channel signal after descrambling and de-spreading；
Step S712：To data channel signal solution CRC check；
Step S714：Recompiled for the correct data channel of CRC check；Otherwise step S722 is gone to；
Step S716：Calculate amplitude offset value of the data channel relative to control channel；
Step S718：Data channel is entered using recodification data, amplitude offset value, the channel estimation based on control channel
Row reconstruct；
Step S720：Reconstruct what is obtained using the data delayed and data channel that are preserved in base band data memory cell
Signal is subtracted each other, and obtains the base band data after Interference Cancellation, while is preserved back in base band data memory cell；
Step S722：Abandon reconstructing.
Fig. 8 is the data channel reconstructing method that the balanced device included according to embodiments of the present invention is symbol level equaliser
Flow chart.As shown in figure 8, this method specifically includes following processing：
Step S802：The descrambling and de-spreading operation of channel is controlled to real-time base band data；
Step S804：Carried out using the descrambling and de-spreading data of the obtained control channel of known pilot frequency information and step S802
Channel estimation, export channel estimation value；
Step S806：Descrambling and de-spreading processing is carried out to data channel using with step S802 identical Real-time Baseband data；
Step S808：It is balanced that symbol level is carried out to data channel multipath data using step S806 output；
Step S810：Channel demultiplexing is transmitted to the data channel signal after equilibrium；
Step S812：To data channel signal solution CRC check；
Step S814：Recompiled for the correct data channel of CRC check；Otherwise step S822 is gone to；
Step S816：Profit calculates amplitude offset value of the data channel relative to control channel；
Step S818：Data channel is entered using recodification data, amplitude offset value, the channel estimation based on control channel
Row reconstruct；
Step S820：Reconstruct what is obtained using the data delayed and data channel that are preserved in base band data memory cell
Signal is subtracted each other, and obtains the base band data after Interference Cancellation, while is preserved back in base band data memory cell；
Step S822：Abandon reconstructing.
As can be seen from the above description, the present invention realizes following technique effect：Balanced to data channel signal
The channel estimation value that directly can still be obtained using control channel is reconstructed after processing, can eliminate multipath, more code channels and
The effect disturbed between multi-user.
Obviously, those skilled in the art should be understood that above-mentioned each module of the invention or each step can be with general
Computing device realize that they can be concentrated on single computing device, or be distributed in multiple computing devices and formed
Network on, alternatively, they can be realized with the program code that computing device can perform, it is thus possible to they are stored
Performed in the storage device by computing device, and in some cases, can be with different from shown in order execution herein
The step of going out or describing, they are either fabricated to each integrated circuit modules respectively or by multiple modules in them or
Step is fabricated to single integrated circuit module to realize.So, the present invention is not restricted to any specific hardware and software combination.
The preferred embodiments of the present invention are these are only, are not intended to limit the invention, for those skilled in the art
For member, the present invention can have various modifications and variations.Any modification within the spirit and principles of the invention, being made,
Equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (11)
- A kind of 1. data channel reconstruction device, it is characterised in that including：Data channel reconfiguration unit, the data channel reconstruct are single Member includes：Recodification module, for being recoded to data channel signal；Data channel amplitude offset estimation module, for obtaining amplitude offset of the data channel signal relative to control channel data Estimate；Data channel reconstructed module, for according to the data channel signal after the amplitude offset estimate and the recodification It is reconstructed；Wherein, the data channel amplitude offset estimation module determines the data channel signal relative to institute in the following manner State the amplitude offset estimate of control channel data：For the data channel, the signal after descrambling and de-spreading and equilibrium For：Formula one：Rd=WHSd·βd·SFd, wherein, w is the weight of balanced device, and H is real channel, SdTo be originally transmitted Data, βdFor amplitude offset, SFdFor data channel spreading code；Using the formula one, the data are calculated using depolarization The amplitude of channel is formula two：[]*To grip place altogether Reason；For the control channel, the signal after descrambling and de-spreading is：Formula three：Rc=HSc·βc·SFc, wherein, H is true Channel, ScFor originally transmitted data, βcFor amplitude offset, SFcFor control channel spreading code, ScFor given data, using described Formula three obtains formula four：Wherein,Channel to be calculated using control channel is estimated Evaluation；By the formula two and the formula four, amplitude offset of the data channel relative to the control channel is obtainedFor：Formula five：
- 2. device according to claim 1, it is characterised in that the data channel amplitude offset estimation module includes：First receiving submodule, the data channel signal and equaliser weights of data channel processing unit are come from for receiving；Second receiving submodule, for receiving the data channel signal after the recodification；3rd receiving submodule, come from control channel processing unit using pilot tone set in advance with being solved by it for receiving Disturb the channel estimation value that the control channel data of despreading processing obtains；Acquisition submodule, for after the data channel signal, the equaliser weights, the recodification that are received described in use It is inclined relative to the amplitude of the control channel that the data channel is calculated in data channel signal and the channel estimation value Shifting value.
- 3. device according to claim 1, it is characterised in that described device also includes：Base band data storage element and dry Disturb offset unit；The Interference Cancellation unit, subtract each other for raw baseband data to be performed with the data after data channel reconstruct Operation, obtains the base band data after the Interference Cancellation and transmission；The base band data memory cell, for receive and store not pass through Interference Cancellation the raw baseband data and Base band data after the Interference Cancellation.
- 4. device according to any one of claim 1 to 3, it is characterised in that described device also includes：At data channel Manage unit and control channel processing unit；The data channel processing unit includes：Chip-level equalizer, for carrying out equilibrium treatment to raw baseband data in chip-level, while it is equalized device weight simultaneously Send；Data channel descrambling and de-spreading module, for receiving the data channel number Jing Guo the chip-level equalizer equilibrium treatment According to progress data channel descrambling and de-spreading processing is simultaneously sent；Transmission channel demultiplexing module, for receiving the data channel Jing Guo the data channel descrambling and de-spreading resume module Data, carry out solution Cyclic Redundancy Code and handle and send；The control channel processing unit includes：Control channel descrambling and de-spreading module, for receiving raw baseband data and carrying out control channel descrambling and de-spreading processing；Channel estimation module, for the control handled according to the control channel descrambling and de-spreading module descrambling and de-spreading of acquisition Channel data and known pilot obtain channel estimation value.
- 5. device according to any one of claim 1 to 3, it is characterised in that described device includes：Data channel processing Unit and control channel processing unit；The data channel processing unit includes：Data channel descrambling and de-spreading module, for receiving raw baseband data, carry out the processing of data channel descrambling and de-spreading and send；Symbol level equaliser, for receiving the data channel signal Jing Guo the data channel descrambling and de-spreading resume module, Equilibrium treatment is carried out to the data channel signal by descrambling and de-spreading processing in symbol level and sent, while is equalized device Weight is simultaneously sent；Transmission channel demultiplexing module, for receiving the data channel signal after the equilibrium treatment, carry out solution and follow Ring redundant code is handled and sent；The control channel processing unit includes：Control channel descrambling and de-spreading module, for receiving raw baseband data, it is controlled channel descrambling and de-spreading and handles and send；Channel estimation module, the control channel data for the control channel descrambling and de-spreading resume module according to acquisition And known pilot obtains channel estimation value.
- A kind of 6. data channel reconstructing method, it is characterised in that including：Data channel signal is recoded；Obtain amplitude offset estimate of the data channel signal relative to control channel data；Using the channel estimation value of the data channel signal after the recodification, the amplitude offset estimate and control channel Carry out data channel reconstruct；Wherein, obtain data channel signal includes relative to the amplitude offset estimate of control channel data：For the data channel, Signal after descrambling and de-spreading and equilibrium is：Formula one：Rd=WHSd·βd·SFd, wherein, w is the weight of balanced device, and H is Real channel, SdFor originally transmitted data, βdFor amplitude offset, SFdFor data channel spreading code；Using the formula one, make The amplitude of the data channel, formula two are calculated with depolarization： []*To grip processing altogether；For the control channel, the signal after descrambling and de-spreading is：Formula three：Rc=HSc·βc·SFc, its In, H is real channel, ScFor originally transmitted data, βcFor amplitude offset, SFcFor control channel spreading code, ScFor datum According to obtaining formula four using the formula three：Wherein,To be calculated using control channel The channel estimation value gone out；By the formula two and the formula four, the data channel is obtained relative to the control channel Amplitude offsetFor：Formula five：
- 7. according to the method for claim 6, it is characterised in that the data for obtaining data channel transmission are relative to control The amplitude offset estimate of the data of transmission includes：Data channel reconfiguration unit receives the data channel signal and equaliser weights for coming from data channel processing unit；The data channel reconfiguration unit receives the data channel signal after the recodification；The data channel reconfiguration unit, which receives, to be come from control channel processing unit using pilot tone set in advance and passes through it The channel estimation value that the control channel data of descrambling and de-spreading processing obtains；The data channel reconfiguration unit using the data channel signal received, the equaliser weights, described rearrange The data channel is calculated relative to the control channel in data channel signal and the channel estimation value after code Amplitude offset value.
- 8. according to the method for claim 7, it is characterised in that received described in the data channel reconfiguration unit utilization Data channel signal and the channel estimation value after data channel signal, the equaliser weights, the recodification calculate Obtain the data channel includes relative to the amplitude offset value of the control channel：The data channel reconfiguration unit utilize described in the data channel signal, the equaliser weights and described heavy that receive The range value of data channel signal is calculated in data channel signal after coding；The data channel reconfiguration unit is worth to the range value of control channel data using the channel estimation；The amplitude of the range value of the data channel divided by the control channel is worth to institute by the data channel reconfiguration unit State amplitude offset estimate.
- 9. according to the method for claim 6, it is characterised in that data channel signal, institute after using the recodification After the channel estimation value progress data channel reconstruct for stating amplitude offset estimate and control channel, in addition to：Raw baseband data and the data after data channel reconstruct are performed into phase reducing, after obtaining Interference Cancellation Base band data.
- 10. the method according to any one of claim 6 to 9, it is characterised in that when the data channel processing unit bag When the balanced device contained is chip-level equalizer, before being recoded to data channel signal, in addition to：Equilibrium treatment is carried out to raw baseband data in chip-level；The data channel signal after equilibrium treatment is subjected to descrambling and de-spreading processing；The data channel signal after descrambling and de-spreading is handled is transmitted channel demultiplexing process；Determine that the data channel signal solution CRC is correct.
- 11. the method according to any one of claim 6 to 9, it is characterised in that when the data channel processing unit bag When the balanced device contained is symbol level equaliser, before being recoded to data channel signal, in addition to：Descrambling and de-spreading processing is carried out to raw baseband data；Equilibrium treatment is carried out to the data channel signal after descrambling and de-spreading is handled in symbol level；The data channel signal after equilibrium treatment is transmitted channel demultiplexing process；Determine that the data channel signal solution CRC is correct.
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