CN104022846B - The method and RNC of decoding - Google Patents
The method and RNC of decoding Download PDFInfo
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- CN104022846B CN104022846B CN201410240388.2A CN201410240388A CN104022846B CN 104022846 B CN104022846 B CN 104022846B CN 201410240388 A CN201410240388 A CN 201410240388A CN 104022846 B CN104022846 B CN 104022846B
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Abstract
The invention discloses a kind of method of decoding and RNC, it is related to field of wireless communications, it is possible to achieve carry out joint source-channel decoding in encryption.Methods described includes：The demodulation value that RNC is reported by channel decoder to base station first carries out channel decoding, obtains channel decoding value, then the channel decoding value is decrypted, and information source enhancing decoding is finally carried out to the channel decoding value after decryption, obtains joint source-channel decoding value.The demodulation value that the present invention is applied to report base station carries out joint source-channel decoding.
Description
Technical field
The present invention relates to field of wireless communications, the method and radio network controller (RNC, nothing of more particularly to a kind of decoding
Line network controller).
Background technology
Voice communication is one of most basic, most important mode in current communication networks, in order to compress in voice source
Redundancy, improves voice transfer efficiency, and various voice codings are arisen at the historic moment.Wherein, multi-velocity self-adapting (Adaptive
Muti-Rate, AMR) voice coding with its flexibility and high efficiency, turns into the voice coder being widely used in various communication systems
Code, including global system for mobile communications (Global System for Mobile Communication, GSM), General Mobile
The systems such as communication system (Universal Mobile Telecommunications System, UMTS) use AMR conducts
Its voice coding modes.
It is real by strengthening decoder using channel decoder and information source in base station (NodeB) at present in AMR systems
Now the data frame of CRC check mistake is carried out joint source-channel decoding (Joint Source Channel Decoding,
JSCD).Wherein, information source strengthens decoder using the redundancy of the adjacent interframe of information source as information source side information (Source Side
Information, SSI), carry out information source enhancing decoding.
However, carrying out joint decoding using channel decoder and information source enhancing decoder in a base station, it is only applicable in base
Data can be carried out with the voice communication system (such as gsm system) of encryption and decryption, for needing RNC to carry out data plus solving in standing
Close voice communication system (such as UMTS system), due to speech data ought be encrypted by increasing check bit in the rnc
When, increased check bit can destroy the redundancy of the adjacent interframe of information source, and speech data can not be decrypted for base station, therefore
Information source enhancing decoder in base station can not carry out information source enhancing decoding using inter-frame redundancy, so as to enter when causing encryption
Row joint source-channel decoding.
The content of the invention
The present invention provides a kind of method and RNC of decoding, it is possible to achieve carries out Joint Source Channel in the umts system and translates
Code.
The technical solution adopted by the present invention is：
In a first aspect, the present invention provides a kind of method of decoding, for Universal Mobile Telecommunications System UMTS, methods described bag
Include：
Channel decoding value is decrypted radio network controller (RNC), and the channel decoding value is to base station by the RNC
The demodulation value that reports carries out channel decoding and obtained, or the channel decoding value be the RNC receive by the base station to solution
Tone pitch carries out the channel decoding value reported after channel decoding；
The RNC carries out information source enhancing decoding to the channel decoding value after decryption, obtains joint source-channel decoding value；
The RNC exports the joint source-channel decoding value.
With reference in a first aspect, in the first possible implementation of first aspect, the channel decoding value is by institute
When stating the demodulation value that RNC reports to base station and carrying out channel decoding and obtain, the RNC carries out information source to the channel decoding value after decryption
Enhancing decoding, after the step of obtaining joint source-channel decoding value, in addition to：
The joint source-channel decoding value is encrypted the RNC；
The RNC is iterated channel decoding to the demodulation value, obtained according to the joint source-channel decoding value of encryption
Turbo channel decoder value；
The turbo channel decoder value is decrypted the RNC, and the turbo channel decoder value after decryption is changed
Strengthen for information source and decode, obtain iteration joint source-channel decoding value；
The step of RNC outputs joint source-channel decoding value, includes：
If the RNC determines iteration ends, the RNC exports final joint source-channel decoding value, the final letter
Source channel joint decoding value is that obtained iteration message source and channel joins after RNC last times are iterated information source enhancing decoding
Close decoding value.
With reference to the first possible implementation of first aspect, in second of possible implementation of first aspect
In, if the step of RNC determines iteration ends, and the RNC exports final joint source-channel decoding value includes：
If the RNC determines that iterations is equal to preset threshold value, the RNC outputs final Joint Source Channel is translated
Code value；Or
If the RNC determines the joint decoding value cyclic redundancy CRC check by the way that the RNC outputs are described final
Joint source-channel decoding value.
Second with reference to first aspect either the first possible implementation or first aspect of first aspect can
Can implementation, in the third possible implementation of first aspect, the demodulation value for merge after demodulation value, institute
State the demodulation value obtained after the demodulation value after merging merges for the demodulation value that at least two base stations report；
Before the step of channel decoding value is decrypted the RNC, in addition to：
The RNC judges whether the channel decoding value CRC check passes through；
The step of channel decoding value is decrypted the RNC includes：
If the channel decoding value CRC check is by the way that channel decoding value is decrypted the RNC.
Second with reference to first aspect either the first possible implementation or first aspect of first aspect can
The implementation of energy, or the third possible implementation of first aspect, in the 4th kind of possible realization of first aspect
In mode, the demodulation value is the A substream demodulation values of multi-velocity self-adapting AMR voices；
The channel decoding value is the A subflow channel decoding values of AMR voices；
The joint source-channel decoding value is the A subflow joint source-channel decoding values of AMR voices.
Second aspect, the present invention provide a kind of RNC, run in Universal Mobile Telecommunications System UMTS, the RNC includes：
Decryption unit, for channel decoding value to be decrypted, the channel decoding value is that base station is reported by the RNC
Demodulation value carry out channel decoding obtain, or the channel decoding value be the RNC receive by the base station to demodulation value
Carry out the channel decoding value reported after channel decoding；
Information source strengthens decoder, and information source enhancing decoding is carried out for the channel decoding value after being decrypted to the decryption unit,
Obtain joint source-channel decoding value；
Output unit, the joint source-channel decoding value obtained for exporting the information source enhancing decoder for decoding.
With reference to second aspect, in the first possible implementation of second aspect, the channel decoding value is by institute
When stating the demodulation value that RNC reports to base station and carrying out channel decoding and obtain, the RNC also includes：Ciphering unit；
The ciphering unit, for the joint source-channel decoding value obtained to information source enhancing decoder for decoding
It is encrypted；
The channel decoder, for the joint source-channel decoding value encrypted according to the ciphering unit, to the solution
Tone pitch is iterated channel decoding, obtains turbo channel decoder value；
The decryption unit, it is additionally operable to solve the turbo channel decoder value that the channel decoder decodes to obtain
It is close；
The information source strengthens decoder, is additionally operable to the turbo channel decoder value after being decrypted to the decryption unit and is iterated
Information source enhancing decoding, obtains iteration joint source-channel decoding value；
The output unit, specifically for when the RNC determines iteration ends, exporting final joint source-channel decoding
Value, the final joint source-channel decoding value are that information source enhancing decoder last time is iterated information source enhancing decoding
Afterwards, the iteration joint source-channel decoding value obtained.
With reference to the first possible implementation of second aspect, in second of possible implementation of second aspect
In,
The output unit, it is described final specifically for when the RNC determines that iterations is equal to preset threshold value, exporting
Joint source-channel decoding value；
The output unit, specifically it is additionally operable to when the RNC determines the joint source-channel decoding value cyclic redundancy CRC
When verification passes through, the final joint source-channel decoding value is exported.
Second with reference to second aspect either the first possible implementation or second aspect of second aspect can
The implementation of energy, in the third possible implementation of second aspect,
The channel decoder carries out the demodulation value of channel decoding as the demodulation value after merging, the solution after the merging
Tone pitch is the demodulation value obtained after the demodulation value that at least two base stations report merges；
The RNC also includes：Judging unit；
The judging unit, the channel decoding value CRC schools obtained for judging the channel decoder channel decoding
Test and whether pass through；
The decryption unit, specifically for judging that the channel decoding value CRC check is obstructed out-of-date when the judging unit,
Channel decoding value is decrypted.
Second with reference to second aspect either the first possible implementation or second aspect of second aspect can
The implementation of energy, or the third possible implementation of second aspect, in the 4th kind of possible realization of second aspect
In mode,
The demodulation value that the channel decoder carries out channel decoding is the A subflow solutions of multi-velocity self-adapting AMR voices
Tone pitch；
The channel decoding value that the channel decoder decodes to obtain is the A subflow channel decoding values of AMR voices；
The joint source-channel decoding value that the information source enhancing decoder for decoding obtains is believed for the A subflows of AMR voices
Source channel joint decoding value.
The method and RNC of decoding provided by the invention, for UMTS system, RNC is first by channel decoder to base station
The demodulation value reported carries out channel decoding, obtains channel decoding value, or obtains base station and demodulation value is carried out on after channel decoding
The channel decoding value of report, then the channel decoding value is decrypted, information source increasing finally is carried out to the channel decoding value after decryption
Strong decoding, obtains joint source-channel decoding value.With being entered in a base station using channel decoder and information source enhancing decoder at present
Row joint source-channel decoding is compared, and the present invention can delete and channel is translated by the way that channel decoding value is decrypted in the rnc
Increased check bit when code value is encrypted, so as to realize information source enhancing decoder using inter-frame redundancy to channel decoding
Value carries out information source enhancing decoding, and then can carry out message source and channel in the UMTS system for needing RNC to carry out encryption and decryption to data
Joint decoding.
Brief description of the drawings
, below will be to the present invention or prior art in order to illustrate more clearly of technical scheme of the invention or of the prior art
The required accompanying drawing used is briefly described in description, it should be apparent that, drawings in the following description are only the present invention's
Some embodiments, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to this
A little accompanying drawings obtain other accompanying drawings.
Fig. 1 is the method flow diagram decoded in the embodiment of the present invention；
Fig. 2 is the schematic diagram that process is decoded in the embodiment of the present invention；
Fig. 3 is the method flow diagram of another decoding in the embodiment of the present invention；
Fig. 4 is the schematic diagram of AMR speech frames processes in the embodiment of the present invention；
Fig. 5 is the schematic diagram that non-iterative decodes process in the embodiment of the present invention；
Fig. 6 is the schematic diagram that another non-iterative decodes process in the embodiment of the present invention；
Fig. 7 is the method flow diagram of another decoding in the embodiment of the present invention；
Fig. 8 is the schematic diagram of iterative decoding process in the embodiment of the present invention；
Fig. 9 is the schematic diagram of another iterative decoding process in the embodiment of the present invention；
Figure 10 is the schematic diagram of another iterative decoding process in the embodiment of the present invention；
Figure 11 is the method flow diagram of another decoding in the embodiment of the present invention；
Figure 12 is the schematic diagram that another non-iterative decodes process in the embodiment of the present invention；
Figure 13 is the schematic diagram that another non-iterative decodes process in the embodiment of the present invention；
Figure 14 is the method flow diagram of another decoding in the embodiment of the present invention；
Figure 15 is the schematic diagram of another iterative decoding process in the embodiment of the present invention；
Figure 16 is the schematic diagram of another iterative decoding process in the embodiment of the present invention；
Figure 17 is the schematic diagram of another iterative decoding process in the embodiment of the present invention.
Figure 18 is the structural representation of RNC in the embodiment of the present invention；
Figure 19 is the structural representation of another RNC in the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained all other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
Technical scheme provided in an embodiment of the present invention, applied in UMTS system.Wherein, UMTS system include base station and
RNC, RNC possess encryption and decryption functions.Base station includes channel decoder, and the channel decoder possesses channel decoding function.In RNC
Channel decoding function is likewise supplied with including channel decoder and information source enhancing decoder, the channel decoder, information source enhancing is translated
Code device possesses information source enhancing decoding function.
The embodiment of the present invention provides a kind of method of decoding, can realize and carry out joint source-channel decoding in encryption,
As shown in figure 1, methods described includes：
101st, channel decoding value is decrypted RNC.
Wherein, channel decoding value is that the demodulation value progress channel decoding reported by RNC to base station obtains, or channel decoding value
The channel decoding value for demodulation value report after channel decoding by base station received for RNC.Specifically, when channel decoding value
When demodulation value progress channel decoding to be reported by RNC to base station obtains, it can also include before step 101：RNC obtains base station
The demodulation value reported, and channel decoding is carried out to the demodulation value by channel decoder, obtain the channel decoding value；When channel is translated
Code value be RNC receive when carrying out the channel decoding value reported after channel decoding to demodulation value by base station, before step 101 also
It can include：RNC obtains the channel decoding value that base station reports.
For the embodiment of the present invention, when speech data is encrypted user equipment (User Equipment, UE), base
The demodulation value that station reports for encryption demodulation value, by channel decoder enter channel decoding value that row decoding obtains equally also for plus
Close channel decoding value.In embodiments of the present invention, by the way that channel decoding value is decrypted, the channel after decryption can be translated
Code value is sent into information source enhancing decoder.
102nd, RNC carries out information source enhancing decoding to the channel decoding value after decryption, obtains joint source-channel decoding value.
Alternatively, step 102 can be：RNC strengthens decoder by information source, and letter is carried out to the channel decoding value after decryption
Source enhancing decoding, obtains joint source-channel decoding value.
Wherein, amount of redundant information be present between parameter of the information source enhancing decoder using consecutive frame during AMR voice codings
Feature, strengthen the input of decoder using the redundancy of the adjacent interframe of information source as information source, the BER (Bit of decoding value can be lifted
Error Rate, bit error rate) performance.In embodiments of the present invention, strengthen decoder by information source to translate the channel after decryption
Code value carries out information source enhancing decoding, the uncorrected bit of part channel decoder can be corrected, so as to lift message source and channel
The BER performances of joint decoding value.
For the embodiment of the present invention, RNC strengthens decoder by information source, the CRC check of channel decoding value can not passed through
Frame carry out information source enhancing decoding, all frames of channel decoding value can also be carried out information source enhancing decoding, the present invention implement
Example does not limit.
For the embodiment of the present invention, information source strengthens decoder and the progress information source enhancing of channel decoding value is translated by JSCD algorithms
Code.Wherein, JSCD algorithms can be SCCD (Source Controlled Channel Decoding, the decoding of source control channel)
Algorithm, SBSD (Soft-Bit Source Decoding, bit source decoding) algorithms or ISCD (Iterative Source
Channel Decoding, the joint source-channel decoding of iteration) the joint source-channel decoding algorithm such as algorithm.
Exemplary, information source strengthens decoder can be by the detailed process of SBSD algorithms progress joint decoding：(1) read
Take the channel decoding value of inputAnd the result of channel decodingIf the result of channel decoding be CRC check by,
Then directly perform step (5)；If the result of channel decoding is CRC check not by performing step (2).(2) according to formulaBit error probability is calculated, wherein,For bit error probability,For channel decoding value.(3) according to formulaThe transfer of calculating parameter level is general
Rate, wherein,For parametric degree transition probability,For bit-level transition probability, according to formulaIt is calculated,For the bit of transmission,For judgement
Bit.(4) according to formula
Calculate posterior probability.Wherein,For posterior probability, C is normalization factor, according to formulaIt is calculated.(5) according to formula
Calculating parameter V decoding result.When channel decoding result for CRC check by when, according to formulaCalculate the posterior probability of decoding.
For the embodiment of the present invention, in the rnc, channel decoding is carried out to demodulation value by channel decoder first, then
Decoding is strengthened by information source information source enhancing decoding is carried out to channel decoding value, message source and channel is carried out in the rnc so as to realize
Joint decoding.
103rd, RNC exports joint source-channel decoding value.
For the embodiment of the present invention, as shown in Fig. 2 RNC includes：Channel decoder, information source enhancing decoder, decryption key
Flow maker.Alternatively, can also include in RNC：Power control module and/or decoding Effective judgement module etc..
Wherein, channel decoder can be VA (Viterbi Algorithm, viterbi algorithm) decoders or LVA (List
Viterbi Algorithm, enumerate viterbi algorithm) decoder etc..In embodiments of the present invention, because LVA decoders can
L bars optimal sequence before output, and CRC check is carried out successively to these sequences, only when this L bar sequence C RC verify it is obstructed out-of-date,
Just think the CRC check mistake of present frame, therefore LVA is relative to VA decoders, it is possible to increase frame is deleted in decoding success rate, reduction
Rate.
For the embodiment of the present invention, as shown in Fig. 2 RNC can directly by the use of the power control control signal that base station reports as
Open sea wharf, open sea wharf, the present invention can also be used as by the use of the CRC check result of the channel decoder in RNC
Embodiment does not limit.
For the embodiment of the present invention, decoder is strengthened by channel decoder and information source message source and channel connection is carried out to demodulation value
When closing decoding, non-iterative joint source-channel decoding can be carried out, joint source-channel decoding can also be iterated.Specifically
Ground, as shown in Fig. 2 when carrying out non-iterative joint source-channel decoding, when information source enhancing decoder carries out information source enhancing first
When decoding obtains joint source-channel decoding value, the joint source-channel decoding value is inputted into decoding Effective judgement module to it
Validity is judged；When being iterated joint source-channel decoding, information source is strengthened by decryption key stream maker first
The value of feedback of decoder output is encrypted, and is then iterated decoding to the value of feedback after encryption by channel decoder, most
Decoder is strengthened by information source afterwards information source enhancing decoding is iterated to the channel decoding value of iteration, until at the end of iteration, will
The joint source-channel decoding value input decoding Effective judgement module of information source enhancing last time information source enhancing decoding has to it
Effect property is judged.
For the embodiment of the present invention, channel decoder can be soft output channel decoder or hard decision channel decoder.
Wherein, when channel decoder is hard decision channel decoder, it can utilize and decode soft value estimator to hard decision output decoding
The decoding value of device is estimated.In embodiments of the present invention, when channel decoder is soft output channel decoder, channel decoding
Value can be channel decoding soft value, and joint source-channel decoding value can be joint source-channel decoding soft value, and demodulation value can be with
To demodulate soft value；When channel decoder is that hard decision exports channel decoder, channel decoding value can be that channel decoding is sentenced firmly
Certainly it is worth, joint source-channel decoding value can be joint source-channel decoding hard-decision values, and demodulation value can be demodulation hard decision
Value.
Alternatively, RNC enters row decoding by soft output channel decoder to the demodulation value that base station reports.Implement in the present invention
In example, relative to the method estimated using hard decision channel decoder decoding value, by using soft output channel decoding
Device enters row decoding, can avoid causing estimate deviation to be present when estimating decoding value, so as to improve
Enter the accuracy of row decoding to demodulation value.
It is alternatively possible to strengthen the preset corresponding proportionality coefficient of decoder difference for the channel decoder in RNC and information source,
To realize that the decoding value exported respectively to channel decoder and information source enhancing decoder zooms in and out in proportion, so as to control
Channel decoder and information source enhancing decoder decode the weight corresponding to obtained decoding value respectively.
The method of decoding provided in an embodiment of the present invention, it can be realized in the case where user is in non-switching scene, can also be
User is under handoff scenario and realized, the embodiment of the present invention does not limit.In embodiments of the present invention, when user is in non-switching
During scene, user only reports decoding value by some base station to RNC, and RNC obtains the decoding value that the base station reports, and it is carried out
Joint source-channel decoding；When user is in handoff scenario, user reports decoding to RNC respectively by least two base stations
Value, RNC obtains the decoding value that at least two base station reports respectively, and is merged the decoding value after being merged, right
Decoding value after the merging carries out joint source-channel decoding.
The method of decoding provided in an embodiment of the present invention, for UMTS system, RNC is first by channel decoder to base station
The demodulation value reported carries out channel decoding, obtains channel decoding value, or obtains base station and demodulation value is carried out on after channel decoding
The channel decoding value of report, then the channel decoding value is decrypted, information source increasing finally is carried out to the channel decoding value after decryption
Strong decoding, obtains joint source-channel decoding value.With being entered in a base station using channel decoder and information source enhancing decoder at present
Row joint source-channel decoding is compared, and the embodiment of the present invention can be deleted pair by the way that channel decoding value is decrypted in the rnc
Channel decoding value increased check bit when being encrypted, so as to realize information source enhancing decoder using inter-frame redundancy to letter
Road decoding value carries out information source enhancing decoding, and then can carry out letter in the UMTS system for needing RNC to carry out encryption and decryption to data
Source channel joint decoding.
Illustrated as to method shown in Fig. 1, the method that the embodiment of the present invention provides another decoding, be applied into
Row non-iterative joint source-channel decoding, as shown in figure 3, methods described includes：
301st, the demodulation value that RNC reports to base station carries out channel decoding, obtains channel decoding value.
Alternatively, step 301 can be that RNC carries out channel decoding to demodulation value, obtain channel by channel decoder
Decoding value.
Alternatively, can also include before step 301：RNC obtains the demodulation value that base station reports.Wherein, base station reports
Demodulation value can be the demodulation value that CRC check does not pass through after base station is decoded by channel decoder；Can also be that base station passes through letter
After road decoder for decoding, all demodulation values.In embodiments of the present invention, RNC can also obtain demodulation value that base station reports, translate
Any one of code value and decoding bit or any combination.
Alternatively, in the umts system, demodulation value can be the A substream demodulation values of AMR voices, and channel decoding value can be
The A subflow channel decoding values of AMR voices, joint source-channel decoding value can be that the A subflow Joint Source Channels of AMR voices are translated
Code value.Wherein, as shown in figure 4, for the AMR speech bits in UMTS system, according to importance from high to low suitable of bit
Sequence, it is divided into A subflows, B subflows and C subflows.Generally, most important A subflows can be protected by CRC code in AMR speech frames, and
The relatively low B subflows of importance and C subflows are not protected then by CRC code.In addition, channel is compiled used by voice transfer
Code is generally convolution coding.
For the embodiment of the present invention, channel decoder can be soft output channel decoder or hard decision channel decoder.
In embodiments of the present invention, when channel decoder is soft output channel decoder, channel decoding value can be that channel decoding is soft
Value, joint source-channel decoding value can be joint source-channel decoding soft value, and demodulation value can be demodulation soft value；When channel is translated
When code device is that hard decision exports channel decoder, channel decoding value can be channel decoding hard-decision values, and Joint Source Channel is translated
Code value can be joint source-channel decoding hard-decision values, and demodulation value can be demodulation hard-decision values.
Such as in Fig. 5, the demodulation soft value that RNC is reported by soft output channel decoder to base station enters row decoding.In Fig. 5,
RNC obtains the A substream demodulation soft values that base station reports first, and then by soft output channel decoder, the demodulation soft value is carried out
Decoding, obtains channel decoding soft value.
Again for example in Fig. 6, the demodulation hard-decision values that RNC is reported by hard decision channel decoder to base station enter row decoding.
In Fig. 6, RNC obtains the A substream demodulation soft values that base station reports first, then by hard decision output decoder to the demodulation soft value
Enter row decoding and obtain channel decoding hard-decision values, the channel decoding finally by soft value estimation module to hard decision output decoder
Hard-decision values are estimated, the channel decoding soft value estimated.Wherein, soft value estimation module refers to work as channel in a short time
Change it is little when, the soft value width of target bits is represented with several nearest demodulation soft value amplitudes relevant with estimation target
Degree.
For example, it is soft value estimation module corresponding to 1/2 convolutional code that soft value estimation module, which can be voice coding modes,.Tool
Body, ifRepresent by channel decoder " PLVA (Parallel List Viterbi Algorithm,
Enumerate viterbi algorithm parallel) decoder " output decoding bit sequence to be estimated, the demodulation soft value sequence of corresponding input
{ L can be expressed asM(00),LM(01),LM(10),LM(11),…,LM(i0),LM(i1) ..., corresponding output to be estimated is translated
Code soft value sequence can be expressed asThe average value of 5 wherein nearest demodulation soft values is obtained, thenAbsolute value can using approximate representation as：
Wherein,Symbol for the decoding bit sequence of input corresponding symbol, for example, it is negative judge image under, symbol can be with
For " 0->-1”、“1->+ 1 ", i.e.,Symbol be
Alternatively, RNC enters row decoding by soft output channel decoder to the demodulation value that base station reports.Implement in the present invention
In example, relative to the method estimated using hard decision channel decoder decoding value, by using soft output channel decoding
Device enters row decoding, can avoid causing estimate deviation to be present when estimating decoding value, so as to improve
Enter the accuracy of row decoding to demodulation value.
302nd, channel decoding value is decrypted RNC.
Wherein, channel decoding value is that the demodulation value progress channel decoding reported by RNC to base station obtains, or channel decoding value
The channel decoding value for demodulation value report after channel decoding by base station received for RNC.Specifically, when channel decoding value
When demodulation value progress channel decoding to be reported by RNC to base station obtains, it can also include before step 302：RNC obtains base station
The demodulation value reported, and channel decoding is carried out to the demodulation value by channel decoder, obtain the channel decoding value；When channel is translated
Code value be RNC receive when carrying out the channel decoding value reported after channel decoding to demodulation value by base station, before step 302 also
It can include：RNC obtains the channel decoding value that base station reports.
For the embodiment of the present invention, when speech data is encrypted user equipment, the demodulation value that base station reports is to add
Close demodulation value, it is also equally the channel decoding value of encryption to enter the channel decoding value that row decoding obtains by channel decoder.
In the embodiment of the present invention, by the way that channel decoding value is decrypted, the channel decoding value after decryption can be sent into information source enhancing
Decoder.
303rd, RNC carries out information source enhancing decoding to the channel decoding value after decryption, obtains joint source-channel decoding value.
Alternatively, step 303 can be that RNC strengthens decoder by information source, and letter is carried out to the channel decoding value after decryption
Source enhancing decoding, obtains joint source-channel decoding value.In embodiments of the present invention, the letter that RNC can also be reported by base station
Road decoding value carries out joint source-channel decoding.Now, step 301 can not perform, and the embodiment of the present invention does not limit.
Wherein, amount of redundant information be present between parameter of the information source enhancing decoder using consecutive frame during AMR voice codings
Feature, strengthen the input of decoder using the redundancy of the adjacent interframe of information source as information source, the performance of decoding value can be lifted.At this
In inventive embodiments, decoder is strengthened by information source information source enhancing decoding is carried out to the channel decoding value after decryption, can corrected
The uncorrected bit of local channel decoder, so as to lift the BER performances of joint source-channel decoding value.
For the embodiment of the present invention, RNC strengthens decoder by information source, the CRC check of channel decoding value can not passed through
Frame carry out information source enhancing decoding, all frames of channel decoding value can also be carried out information source enhancing decoding, the present invention implement
Example does not limit.
For the embodiment of the present invention, information source strengthens decoder strengthens algorithm to the progress information source increasing of channel decoding value by information source
Strong decoding.Wherein, information source enhancing algorithm can be the message source and channel message source and channels such as SCCD algorithms, SBSD algorithms or ISCD algorithms connection
Close decoding algorithm.
For the embodiment of the present invention, information source strengthens decoder and carries out the specific of joint source-channel decoding by SBSD algorithms
Process may be referred to the corresponding description in Fig. 1, will not be repeated here.
For the embodiment of the present invention, in the rnc, channel decoding is carried out to demodulation value by channel decoder first, then
Decoding is strengthened by information source information source enhancing decoding is carried out to channel decoding value, message source and channel is carried out in the rnc so as to realize
Joint decoding.
304th, RNC exports joint source-channel decoding value.
For the embodiment of the present invention, as shown in Fig. 2 RNC includes：Channel decoder, information source enhancing decoder, decryption key
Flow maker.Alternatively, can also include in RNC：Power control module and/or decoding Effective judgement module etc..
Wherein, channel decoder can be VA decoders or LVA decoders etc..Preferably, by LVA decoders to base station
The demodulation value reported carries out channel decoding.In embodiments of the present invention, L bar optimal sequences before being exported due to LVA decoders,
And CRC check is carried out successively to these sequences, only when this L bar sequence C RC verify it is obstructed out-of-date, just think the CRC of present frame
Check errors, therefore channel decoding is carried out relative to the demodulation value reported using VA decoders to base station, decoded by using LVA
Device enters row decoding to the demodulation value that base station reports, it is possible to increase frame per second is deleted in decoding success rate, reduction.
Alternatively, can also include after step 304：RNC judges that joint source-channel decoding value is according to presetting rule
No reasonable, if joint source-channel decoding value is unreasonable, RNC carries out information source enhancing decoding to joint source-channel decoding value.
Wherein, presetting rule can be rule corresponding to the redundancy of the adjacent interframe of joint source-channel decoding value.
For the embodiment of the present invention, as shown in Fig. 2 can also be hidden including decoding Effective judgement module and mistake in RNC
Module is hidden, the decoding Effective judgement module is used for according to presetting rule, and the reasonability of joint source-channel decoding value is carried out
Judge.In embodiments of the present invention, as shown in Figures 5 and 6, the error concealing can be parametric degree error concealment module.
Alternatively, as shown in Fig. 2 power control module can also be included in RNC.For the embodiment of the present invention, RNC can be with
Directly by the use of the power control control signal that base station reports as open sea wharf, the channel decoder in RNC can also be utilized
CRC check result does not limit as open sea wharf, the embodiment of the present invention.
Alternatively, error concealment module can also be included in RNC, as can be seen from figures 8 and 9, the error concealing can be ginseng
Several levels error concealment module.
Alternatively, as shown in Fig. 2 power control module can also be included in RNC.For the embodiment of the present invention, RNC can be with
Directly by the use of the power control control signal that base station reports as open sea wharf, the channel decoder in RNC can also be utilized
CRC check result does not limit as open sea wharf, the embodiment of the present invention.
It is alternatively possible to strengthen the preset corresponding proportionality coefficient of decoder difference for the channel decoder in RNC and information source,
To realize that the decoding value exported respectively to channel decoder and information source enhancing decoder zooms in and out in proportion, so as to control
Channel decoder and information source enhancing decoder decode the weight corresponding to obtained decoding value respectively.
For the embodiment of the present invention, Fig. 5 and Fig. 6 are to carry out joint source-channel decoding under arrowband AMR voice scenes,
Respectively respective handling has been carried out for A substream demodulations value, B subflows decoding bit and C subflows decoding bit.It should be noted that
The method of decoding provided in an embodiment of the present invention, it is equally applicable to the progress Joint Source Channel under Wideband AMR speech scene and translates
Code.Wherein, under Wideband AMR speech frame scene, the bit number of C subflows is 0.
In addition, when carrying out joint source-channel decoding under arrowband AMR voice scenes, A is respectively directed in Fig. 5 and Fig. 6
Substream demodulation value, B subflows decoding bit and C subflows decoding bit have carried out respective handling.It should be noted that the present invention is implemented
The method for the decoding that example provides, respective handling can also be only carried out to A substream demodulations value, i.e., only the bit in A subflows is carried out
Information source enhancing decoding；Bit can also be only decoded to A substream demodulations value and B subflows, and (or A substream demodulations value and C subflows decode ratio
It is special) carry out respective handling, i.e., information source enhancing decoding is only carried out to the bit in A subflows and B subflows (or A subflows and C subflows).
For the embodiment of the present invention, Fig. 5 and Fig. 6 only carry out joint source-channel decoding to A subflows.Need what is illustrated
It is the method for decoding provided in an embodiment of the present invention, joint source-channel decoding only can also be carried out to B subflows；Can also be only
Joint source-channel decoding is carried out to C subflows；Message source and channel can also be carried out to any combination of A subflows, B subflows and C subflows
Joint decoding；Joint source-channel decoding can also be carried out to portion's bit in A subflows, B subflows and C subflows.
The method of decoding provided in an embodiment of the present invention, for UMTS system, RNC is first by channel decoder to base station
The demodulation value reported carries out channel decoding, obtains channel decoding value, or obtains base station and demodulation value is carried out on after channel decoding
The channel decoding value of report, then the channel decoding value is decrypted, information source increasing finally is carried out to the channel decoding value after decryption
Strong decoding, obtains joint source-channel decoding value.With being entered in a base station using channel decoder and information source enhancing decoder at present
Row joint source-channel decoding is compared, and the embodiment of the present invention can be deleted pair by the way that channel decoding value is decrypted in the rnc
Channel decoding value increased check bit when being encrypted, so as to realize information source enhancing decoder using inter-frame redundancy to letter
Road decoding value carries out information source enhancing decoding, and then can carry out letter in the UMTS system for needing RNC to carry out encryption and decryption to data
Source channel joint decoding.
Further, the method for decoding provided in an embodiment of the present invention, base station is reported by soft output channel decoder
Demodulation value enter row decoding, can avoid causing estimate deviation to be present when estimating decoding value, so as to
To improve the accuracy for entering row decoding to demodulation value；Decoder is strengthened to the channel that decodes to obtain by channel decoder by information source
Decoding value carries out information source enhancing decoding, can correct the uncorrected bit of part channel decoder, can lift message source and channel connection
Close the BER performances of decoding value；Row decoding is entered to the demodulation value that base station reports by LVA decoders, it is possible to increase decoding success rate,
Frame per second is deleted in reduction；By distinguishing preset corresponding proportionality coefficient for each decoder in RNC, to realize to the input of each decoder
Decoding value and the decoding value of output zoom in and out in proportion, so as to control corresponding to the decoding value that each decoder for decoding obtains
Weight.
Illustrated as to method shown in Fig. 1, the method that the embodiment of the present invention provides another decoding, be applied into
Row iteration joint source-channel decoding, as shown in fig. 6, methods described includes：
701st, the demodulation value that RNC reports to base station carries out channel decoding, obtains channel decoding value.
Alternatively, step 701 can be that RNC carries out channel decoding to demodulation value, obtain channel by channel decoder
Decoding value.
Alternatively, can also include before step 701：RNC obtains the demodulation value that base station reports.Wherein, base station reports
Demodulation value can be the demodulation value that CRC check does not pass through after base station is decoded by channel decoder；Can also be that base station passes through letter
After road decoder for decoding, all demodulation values.In embodiments of the present invention, RNC can also obtain demodulation value that base station reports, translate
Any one of code value and decoding bit or any combination.
Alternatively, in the umts system, demodulation value can be the A substream demodulation values of AMR voices, and channel decoding value can be
The A subflow channel decoding values of AMR voices, joint source-channel decoding value can be that the A subflow Joint Source Channels of AMR voices are translated
Code value.Wherein, as shown in figure 4, for the AMR speech bits in UMTS system, according to importance from high to low suitable of bit
Sequence, it is divided into A subflows, B subflows and C subflows.Generally, most important A subflows can be protected by CRC code in AMR speech frames, and
The relatively low B subflows of importance and C subflows are not protected then by CRC code.In addition, channel is compiled used by voice transfer
Code is generally convolution coding.
For the embodiment of the present invention, channel decoder can be soft output channel decoder or hard decision channel decoder.
In embodiments of the present invention, when channel decoder is soft output channel decoder, channel decoding value can be that channel decoding is soft
Value, joint source-channel decoding value can be joint source-channel decoding soft value, and demodulation value can be demodulation soft value；When channel is translated
When code device is that hard decision exports channel decoder, channel decoding value can be channel decoding hard-decision values, and Joint Source Channel is translated
Code value can be joint source-channel decoding hard-decision values, and demodulation value can be demodulation hard-decision values.
Such as in Fig. 8, the demodulation soft value that RNC is reported by soft output channel decoder to base station enters row decoding.In Fig. 8,
RNC obtains the A substream demodulation soft values that base station reports first, and then by soft output channel decoder, the demodulation soft value is carried out
Decoding, obtains channel decoding soft value.
Again for example in Fig. 9, the demodulation hard-decision values that RNC is reported by hard decision channel decoder to base station enter row decoding.
In Fig. 9, RNC obtains the A substream demodulation soft values that base station reports first, then by hard decision output decoder to the demodulation soft value
Enter row decoding and obtain channel decoding hard-decision values, the channel decoding finally by soft value estimation module to hard decision output decoder
Hard-decision values are estimated, the channel decoding soft value estimated.Wherein, soft value estimation module refers to work as channel in a short time
Change it is little when, the soft value width of target bits is represented with several nearest demodulation soft value amplitudes relevant with estimation target
Degree.
For the embodiment of the present invention, soft value estimation module can be that voice coding modes are soft corresponding to 1/2 convolutional code
It is worth estimation module.In embodiments of the present invention, the corresponding description that soft value estimation module is estimated is referred to the correspondence in Fig. 3
Description, will not be repeated here.
Alternatively, RNC enters row decoding by soft output channel decoder to the demodulation value that base station reports.Implement in the present invention
In example, relative to the method estimated using hard decision channel decoder decoding value, by using soft output channel decoding
Device enters row decoding, can avoid causing estimate deviation to be present when estimating decoding value, so as to improve
Enter the accuracy of row decoding to demodulation value.
702nd, channel decoding value is decrypted RNC.
Wherein, channel decoding value is that the demodulation value progress channel decoding reported by RNC to base station obtains, or channel decoding value
The channel decoding value for demodulation value report after channel decoding by base station received for RNC.Specifically, when channel decoding value
When demodulation value progress channel decoding to be reported by RNC to base station obtains, it can also include before step 702：RNC obtains base station
The demodulation value reported, and channel decoding is carried out to the demodulation value by channel decoder, obtain the channel decoding value；When channel is translated
Code value be RNC receive when carrying out the channel decoding value reported after channel decoding to demodulation value by base station, before step 702 also
It can include：RNC obtains the channel decoding value that base station reports.
For the embodiment of the present invention, when speech data is encrypted user equipment, the demodulation value that base station reports is to add
Close demodulation value, it is also equally the channel decoding value of encryption to enter the channel decoding value that row decoding obtains by channel decoder.
In the embodiment of the present invention, by the way that channel decoding value is decrypted, the channel decoding value after decryption can be sent into information source enhancing
Decoder.
703rd, RNC carries out information source enhancing decoding to the channel decoding value after decryption, obtains joint source-channel decoding value.
Alternatively, step 703 can be that RNC strengthens decoder by message source and channel joint source-channel decoding information source, right
Channel decoding value after decryption carries out information source enhancing decoding, obtains joint source-channel decoding value.For the embodiment of the present invention,
RNC can also carry out joint source-channel decoding by the channel decoding value that base station reports.Now, step 701 can not perform,
The embodiment of the present invention does not limit.
Wherein, amount of redundant information be present between parameter of the information source enhancing decoder using consecutive frame during AMR voice codings
Feature, strengthen the input of decoder using the redundancy of the adjacent interframe of information source as information source, the performance of decoding value can be lifted.At this
In inventive embodiments, decoder is strengthened by information source information source enhancing decoding is carried out to the channel decoding value after decryption, can corrected
The uncorrected bit of local channel decoder, so as to lift the BER performances of joint source-channel decoding value.
For the embodiment of the present invention, RNC strengthens decoder by information source, the CRC check of channel decoding value can not passed through
Frame carry out information source enhancing decoding, all frames of channel decoding value can also be carried out information source enhancing decoding, the present invention implement
Example does not limit.
For the embodiment of the present invention, information source strengthens decoder strengthens algorithm to the progress information source increasing of channel decoding value by information source
Strong decoding.Wherein, information source enhancing algorithm can be the message source and channel message source and channels such as SCCD algorithms, SBSD algorithms or ISCD algorithms connection
Close decoding algorithm.
For the embodiment of the present invention, information source strengthens decoder and carries out the specific of joint source-channel decoding by SBSD algorithms
Process may be referred to the corresponding description in Fig. 1, will not be repeated here.
For the embodiment of the present invention, in the rnc, channel decoding is carried out to demodulation value by channel decoder first, then
Decoding is strengthened by information source information source enhancing decoding is carried out to channel decoding value, message source and channel is carried out in the rnc so as to realize
Joint decoding.
704th, joint source-channel decoding value is encrypted RNC.
For the embodiment of the present invention, it is that the demodulation value progress channel reported by RNC to base station is translated that can work as channel decoding value
When code obtains, step 704 is performed.
For the embodiment of the present invention, when RNC is iterated joint source-channel decoding, if encryption function is opened, need
Joint source-channel decoding value caused by strengthening decoder for decoding to information source is encrypted, as can be seen from figures 8 and 9.
In the embodiment of the present invention, because channel decoder enters row decoding to the demodulation value of encryption, information source strengthens letter of the decoder to decryption
Road decoding value enters row decoding, therefore when being iterated joint source-channel decoding, is increased by strengthening decoder information source to information source
The joint source-channel decoding value obtained after strong decoding is encrypted, and can realize that channel decoder is believed the information source of encryption
Road joint decoding value is iterated decoding, and joint source-channel decoding is iterated in the rnc so as to realize.
705th, RNC is iterated decoding to demodulation value, obtains the letter of iteration according to the joint source-channel decoding value of encryption
Road decoding value.
Alternatively, step 705 can be, RNC is according to the joint source-channel decoding value of encryption, by channel decoder,
Decoding is iterated to demodulation value, obtains the channel decoding value of iteration.
Wherein, channel decoder can be soft output channel decoder or hard decision channel decoder.Implement in the present invention
In example, when channel decoder is soft output channel decoder, channel decoding value can be channel decoding soft value, and message source and channel joins
It can be joint source-channel decoding soft value to close decoding value, and demodulation value can be demodulation soft value；When channel decoder is hard decision
When exporting channel decoder, channel decoding value can be channel decoding hard-decision values, and joint source-channel decoding value can be letter
Source channel joint decoding hard-decision values, demodulation value can be demodulation hard-decision values.
Such as in Fig. 8, the demodulation soft value that RNC is reported by soft output channel decoder to base station enters row decoding.In Fig. 8,
RNC obtains the A substream demodulation soft values that base station reports first, and then by soft output channel decoder, the demodulation soft value is carried out
Decoding, obtains channel decoding soft value.
Again for example in Fig. 9, the demodulation hard-decision values that RNC is reported by hard decision channel decoder to base station enter row decoding.
In Fig. 9, RNC obtains the A substream demodulation soft values that base station reports first, then by hard decision output decoder to the demodulation soft value
Enter row decoding and obtain channel decoding hard-decision values, the channel decoding finally by soft value estimation module to hard decision output decoder
Hard-decision values are estimated, the channel decoding soft value estimated.Wherein, soft value estimation module refers to work as channel in a short time
Change it is little when, the soft value width of target bits is represented with several nearest demodulation soft value amplitudes relevant with estimation target
Degree.
706th, RNC is iterated information source enhancing decoding to the channel decoding value of iteration, obtains the Joint Source Channel of iteration
Decoding value.
Alternatively, step 706 can be that RNC strengthens decoder by information source, and the channel decoding value of iteration is iterated
Information source enhancing decoding, obtains the joint source-channel decoding value of iteration.
For the embodiment of the present invention, when RNC is iterated joint source-channel decoding, information source enhancing decoder can be adopted
Carry out message source and channel joint source-channel decoding with SBSD algorithms, now, information source enhancing decoder need not export value of feedback (or will
0) value of feedback is set to；Information source enhancing decoder can also use ISCD algorithms to carry out message source and channel joint source-channel decoding, this
When, information source strengthens the Soft Inform ation that decoder will be calculated in every wheel iterative process, feeds back to channel decoder.Wherein, feed back
Value can be feedback soft value or feedback hard-decision values.
If the 707, RNC determines iteration ends, RNC exports final joint source-channel decoding value.
Wherein, the final joint source-channel decoding value is after RNC last times are iterated information source enhancing decoding, to obtain
The joint source-channel decoding value of the iteration arrived.
For the embodiment of the present invention, carry out non-iterative Joint Source Channel with channel decoder and information source enhancing decoder and translate
Code-phase ratio, the embodiment of the present invention strengthen decoder by channel decoder and information source and are iterated joint source-channel decoding, by
During iteration joint source-channel decoding, channel decoder is repeatedly decoded according to value of feedback, and information source enhancing is translated
The obtained channel decoding value that decodes multiple to channel decoder carries out information source enhancing decoding, therefore final message source and channel to code device respectively
Joint decoding value compared with decoding obtained joint source-channel decoding value for the first time, it is possible to increase MOS (Mean Opinion
Score, Mean Opinion Score) performance, so as to lift subjective feeling of the user for voice messaging；BLER can be reduced simultaneously
(Block Error Ratio, bLock error rate) performance, so as to reduce block rate wrong in sound transmission course.
Alternatively, step 707 can also be：If RNC determines joint source-channel decoding, value cyclic redundancy CRC check is led to
Cross, then RNC exports final joint source-channel decoding value.
For the embodiment of the present invention, by the joint source-channel decoding value for strengthening information source the iteration that iterative decoding obtains
Carry out CRC check, and when iteration the CRC check of joint source-channel decoding value by when, translated as final Joint Source Channel
Code value, the decoding accuracy of final joint source-channel decoding value can be ensured.
Alternatively, step 707 can be：If RNC determines that iterations is equal to preset threshold value, the final letter of RNC outputs
Source channel joint decoding value.
Wherein, preset threshold value can be configured in advance by RNC, and the preset threshold value is translated to be iterated Joint Source Channel
Maximum iteration during code.For example, the preset threshold value that RNC is configured in advance can be that 5 times, 8 times or 13 are inferior.
For the embodiment of the present invention, increased by when iterations is equal to preset threshold value, terminating channel decoder and information source
The joint iterative decoding process of strong decoder, can avoid the excessive situation of iterations, so as to reduce iteration information source letter
The complexity of road joint decoding.
For the embodiment of the present invention, as shown in Fig. 2 RNC includes：Channel decoder, information source enhancing decoder, decryption key
Flow maker.Alternatively, can also include in RNC：Power control module and/or decoding Effective judgement module etc..
Wherein, channel decoder can be VA decoders or LVA decoders etc..Preferably, by LVA decoders to base station
The demodulation value reported carries out channel decoding.In embodiments of the present invention, L bar optimal sequences before being exported due to LVA decoders,
And CRC check is carried out successively to these sequences, only when this L bar sequence C RC verify it is obstructed out-of-date, just think the CRC of present frame
Check errors, therefore channel decoding is carried out relative to the demodulation value reported using VA decoders to base station, decoded by using LVA
Device enters row decoding to the demodulation value that base station reports, it is possible to increase frame per second is deleted in decoding success rate, reduction.
Alternatively, can also include after step 707：RNC judges that joint source-channel decoding value is according to presetting rule
No reasonable, if joint source-channel decoding value is unreasonable, RNC carries out information source enhancing decoding to joint source-channel decoding value.
Wherein, presetting rule can be rule corresponding to the redundancy of the adjacent interframe of joint source-channel decoding value.
For the embodiment of the present invention, as shown in Fig. 2 can also be hidden including decoding Effective judgement module and mistake in RNC
Module is hidden, the decoding Effective judgement module is used for according to presetting rule, and the reasonability of joint source-channel decoding value is carried out
Judge.In embodiments of the present invention, as can be seen from figures 8 and 9, the error concealing can be parametric degree error concealment module.
Alternatively, error concealment module can also be included in RNC, as can be seen from figures 8 and 9, the error concealing can be ginseng
Several levels error concealment module.
Alternatively, as shown in Fig. 2 power control module can also be included in RNC.For the embodiment of the present invention, RNC can be with
Directly by the use of the power control control signal that base station reports as open sea wharf, the channel decoder in RNC can also be utilized
CRC check result does not limit as open sea wharf, the embodiment of the present invention.
It is alternatively possible to strengthen the preset corresponding proportionality coefficient of decoder difference for the channel decoder in RNC and information source,
To realize that the decoding value exported respectively to channel decoder and information source enhancing decoder zooms in and out in proportion, so as to control
Channel decoder and information source enhancing decoder decode the weight corresponding to obtained decoding value respectively.
For the embodiment of the present invention, Fig. 8 and Fig. 9 are to be iterated Joint Source Channel under arrowband AMR voice scenes
Decoding, decode bit for A substream demodulations value, B subflows respectively and C subflows decoding bit has carried out respective handling.Need to illustrate
, the method for decoding provided in an embodiment of the present invention, it is equally applicable to carry out message source and channel connection under Wideband AMR speech scene
Close decoding.Wherein, under Wideband AMR speech frame scene, the bit number of C subflows is 0.
In addition, when being iterated joint source-channel decoding under arrowband AMR voice scenes, divide equally safety pin in Fig. 8 and Fig. 9
Respective handling has been carried out to A substream demodulations value, B subflows decoding bit and C subflows decoding bit.It is it should be noted that of the invention
The method for the decoding that embodiment provides, respective handling only can also be carried out to A substream demodulations value, i.e., only to the bit in A subflows
Carry out information source enhancing decoding；Bit can also be only decoded to A substream demodulations value and B subflows, and (or A substream demodulations value and C subflows are translated
Code bit) carry out respective handling, i.e., information source enhancing is only carried out to the bit in A subflows and B subflows (or A subflows and C subflows) translates
Code.
For the embodiment of the present invention, Fig. 8 and Fig. 9 are only iterated joint source-channel decoding amendment to A subflows.Need
Illustrate, the method for decoding provided in an embodiment of the present invention, joint source-channel decoding only can also be carried out to B subflows；Also
Joint source-channel decoding only can be carried out to C subflows；Letter can also be carried out to any combination of A subflows, B subflows and C subflows
Source channel joint decoding letter；Joint source-channel decoding can also be carried out to portion's bit in A subflows, B subflows and C subflows.
The method of decoding provided in an embodiment of the present invention, for UMTS system, RNC is first by channel decoder to base station
The demodulation value reported carries out channel decoding, obtains channel decoding value, or obtains base station and demodulation value is carried out on after channel decoding
The channel decoding value of report, then the channel decoding value is decrypted, information source increasing finally is carried out to the channel decoding value after decryption
Strong decoding, obtains joint source-channel decoding value.With being entered in a base station using channel decoder and information source enhancing decoder at present
Row joint source-channel decoding is compared, and the embodiment of the present invention can be deleted pair by the way that channel decoding value is decrypted in the rnc
Channel decoding value increased check bit when being encrypted, so as to realize information source enhancing decoder using inter-frame redundancy to letter
Road decoding value carries out information source enhancing decoding, and then can carry out letter in the UMTS system for needing RNC to carry out encryption and decryption to data
Source channel joint decoding.
Further, the method for decoding provided in an embodiment of the present invention, the Joint Source Channel for passing through CRC check is passed through
Decoding value can ensure the decoding accuracy of final joint source-channel decoding value as final joint source-channel decoding value；
By the joint iterative decoding mistake for when iterations is equal to preset threshold value, terminating channel decoder and information source enhancing decoder
Journey, the excessive situation of iterations can be avoided, so as to reduce the complexity of iteration joint source-channel decoding；By working as
When carrying out iteration joint source-channel decoding first, the decoding value that information source enhancing decoder directly reports to base station carries out information source increasing
Strong decoding, it can avoid once by channel decoder entering the process of row decoding, so as to save resource；Believed by soft output
Road decoder enters row decoding to the demodulation value that base station reports, and can avoid causing estimate to exist when estimating decoding value
The situation of deviation, so as to improve the accuracy for entering row decoding to demodulation value；Decoder is strengthened to being translated by channel by information source
The channel decoding value that code device decodes to obtain carries out information source enhancing decoding, being capable of the information source enhancing non-information source of decoding portion channel decoder
Strengthen the bit of decoding, the BER performances of joint source-channel decoding value can be lifted.
Illustrated as to method shown in Fig. 1, the method that the embodiment of the present invention provides another decoding, suitable for working as
When user equipment is in switch area, non-iterative joint source-channel decoding is carried out, as shown in figure 11, methods described includes：
1101st, RNC carries out channel decoding to demodulation value, obtains channel decoding value.
Alternatively, step 1101 can be that RNC carries out channel decoding to demodulation value, obtain channel by channel decoder
Decoding value.
For the embodiment of the present invention, demodulation value can be the demodulation value after merging, and the demodulation value after the merging is at least two
The demodulation value that the demodulation value that individual base station reports obtains after merging.Now, can also include before step 1101：RNC is obtained
Demodulation value after merging.In embodiments of the present invention, when user equipment is in switch area, at least in the presence of two base stations and the use
Family equipment is communicated, and now, RNC obtains the demodulation value that each base station reports respectively, and these each base stations are reported respectively
Demodulation value merge, the demodulation value after being merged.Wherein, the demodulation value after merging can be to pass through channel in a base station
After decoder for decoding, demodulation value that CRC check does not pass through；Can also be after being decoded in a base station by channel decoder, to own
Demodulation value.In addition, RNC can also obtain any one of the demodulation value after merging, decoding value and decoding bit or any
Combination.
Alternatively, in the umts system, demodulation value can be the A substream demodulation values of AMR voices, and channel decoding value can be
The A subflow channel decoding values of AMR voices, joint source-channel decoding value can be that the A subflow Joint Source Channels of AMR voices are translated
Code value.Wherein, as shown in figure 4, for the AMR speech bits in UMTS system, according to importance from high to low suitable of bit
Sequence, it is divided into A subflows, B subflows and C subflows.Generally, most important A subflows can be protected by CRC code in AMR speech frames, and
The relatively low B subflows of importance and C subflows are not protected then by CRC code.In addition, channel is compiled used by voice transfer
Code is generally convolution coding.
For the embodiment of the present invention, channel decoder can be soft output channel decoder or hard decision channel decoder.
In embodiments of the present invention, when channel decoder is soft output channel decoder, channel decoding value can be that channel decoding is soft
Value, joint source-channel decoding value can be joint source-channel decoding soft value, and demodulation value can be demodulation soft value；When channel is translated
When code device is that hard decision exports channel decoder, channel decoding value can be channel decoding hard-decision values, and Joint Source Channel is translated
Code value can be joint source-channel decoding hard-decision values, and demodulation value can be demodulation hard-decision values.
Such as in Figure 12, RNC enters row decoding by soft output channel decoder to the demodulation soft value of merging.In Figure 12, RNC
The A substream demodulation soft values of merging are obtained first, then by soft output channel decoder, row decoding are entered to the demodulation soft value, obtained
To channel decoding soft value.
Again for example in Figure 13, RNC enters row decoding by hard decision channel decoder to the demodulation hard-decision values of merging.Figure 13
In, RNC obtains the A substream demodulation soft values of merging first, and then the demodulation soft value is translated by hard decision output decoder
Code obtains channel decoding hard-decision values, the channel decoding hard decision finally by soft value estimation module to hard decision output decoder
Value estimated, the channel decoding soft value estimated.Wherein, soft value estimation module refers to work as the change of channel in a short time
When little, the soft value amplitude of target bits is represented with several nearest demodulation soft value amplitudes relevant with estimation target.
For the embodiment of the present invention, soft value estimation module can be that voice coding modes are soft corresponding to 1/2 convolutional code
It is worth estimation module.In embodiments of the present invention, the corresponding description that soft value estimation module is estimated is referred to the correspondence in Fig. 3
Description, will not be repeated here.
Alternatively, RNC enters row decoding by soft output channel decoder to the demodulation value of merging.In the embodiment of the present invention
In, relative to the method estimated using hard decision channel decoder decoding value, by using soft output channel decoder
Enter row decoding, can avoid causing estimate deviation to be present when estimating decoding value, so as to improve pair
Demodulation value enters the accuracy of row decoding.
1102nd, RNC judges whether the CRC check of channel decoding value passes through.
For the embodiment of the present invention, merge gain, the solution that different base station reports respectively because the demodulation value after merging is present
Tone pitch there is a possibility that error is cancelled out each other during merging, therefore the demodulation value after to the merging carries out channel and translated
After code, obtained channel decoding value has that CRC check can be by.In embodiments of the present invention, at user equipment
At switch area, by channel decoding value carry out CRC check, can avoid when the CRC check of channel decoding value by when, information source
Enhancing decoder carries out repeating the situation of decoding to it, so as to improve decoding efficiency.
The 1103rd, if the CRC check of channel decoding value is by the way that channel decoding value is decrypted RNC.
Wherein, channel decoding value is that the demodulation value progress channel decoding reported by RNC to base station obtains, or channel decoding value
The channel decoding value for demodulation value report after channel decoding by base station received for RNC.Specifically, when channel decoding value
When demodulation value progress channel decoding to be reported by RNC to base station obtains, it can also include before step 1103：RNC obtains base
The demodulation value that station reports, and channel decoding is carried out to the demodulation value by channel decoder, obtain the channel decoding value；Work as channel
Decoding value be RNC receive by base station to demodulation value carry out channel decoding after report channel decoding value when, step 1103 it
Before can also include：RNC obtains the channel decoding value that base station reports.
For the embodiment of the present invention, when speech data is encrypted user equipment, the demodulation value that base station reports is to add
Close demodulation value, it is also equally the channel decoding value of encryption to enter the channel decoding value that row decoding obtains by channel decoder.
In the embodiment of the present invention, by the way that channel decoding value is decrypted, the channel decoding value after decryption can be sent into information source enhancing
Decoder.
1104th, RNC carries out information source enhancing decoding to the channel decoding value after decryption, obtains joint source-channel decoding value.
Alternatively, step 1104 can be that RNC strengthens decoder by information source, and the channel decoding value after decryption is carried out
Information source enhancing decoding, obtains joint source-channel decoding value.In embodiments of the present invention, RNC can also be reported by base station
Channel decoding value carries out joint source-channel decoding.Now, step 1101 can not perform, and the embodiment of the present invention does not limit.
Wherein, amount of redundant information be present between parameter of the information source enhancing decoder using consecutive frame during AMR voice codings
Feature, strengthen the input of decoder using the redundancy of the adjacent interframe of information source as information source, the performance of decoding value can be lifted.At this
In inventive embodiments, decoder is strengthened by information source information source enhancing decoding is carried out to the channel decoding value after decryption, can corrected
The uncorrected bit of local channel decoder, so as to lift the BER performances of joint source-channel decoding value.
For the embodiment of the present invention, RNC strengthens decoder by information source, the CRC check of channel decoding value can not passed through
Frame carry out information source enhancing decoding, all frames of channel decoding value can also be carried out information source enhancing decoding, the present invention implement
Example does not limit.
For the embodiment of the present invention, information source strengthens decoder strengthens algorithm to the progress information source increasing of channel decoding value by information source
Strong decoding.Wherein, information source enhancing algorithm can be the message source and channel message source and channels such as SCCD algorithms, SBSD algorithms or ISCD algorithms connection
Close decoding algorithm.
For the embodiment of the present invention, information source strengthens decoder and carries out the specific of joint source-channel decoding by SBSD algorithms
Process may be referred to the corresponding description in Fig. 1, will not be repeated here.
1105th, RNC exports joint source-channel decoding value.
For the embodiment of the present invention, as shown in Fig. 2 RNC includes：Channel decoder, information source enhancing decoder, decryption key
Flow maker.Alternatively, can also include in RNC：Power control module and/or decoding Effective judgement module etc..
Wherein, channel decoder can be VA decoders or LVA decoders etc..Preferably, by LVA decoders to merging
Demodulation value carry out channel decoding.In embodiments of the present invention, L bar optimal sequences before being exported due to LVA decoders, and it is right
These sequences carry out CRC check successively, only when this L bar sequence C RC verify it is obstructed out-of-date, just think the CRC check of present frame
Mistake, therefore channel decoding is carried out to the demodulation value of merging relative to using VA decoders, by using LVA decoders to merging
Demodulation value enter row decoding, it is possible to increase decoding success rate, reduction delete frame per second.
Alternatively, can also include after step 1105：RNC judges joint source-channel decoding value according to presetting rule
Rationally whether, if joint source-channel decoding value is unreasonable, RNC carries out information source enhancing to joint source-channel decoding value and translated
Code.Wherein, presetting rule can be rule corresponding to the redundancy of the adjacent interframe of joint source-channel decoding value.
For the embodiment of the present invention, as shown in Fig. 2 can also be hidden including decoding Effective judgement module and mistake in RNC
Module is hidden, the decoding Effective judgement module is used for according to presetting rule, and the reasonability of joint source-channel decoding value is carried out
Judge.In embodiments of the present invention, as shown in FIG. 12 and 13, the error concealing can be parametric degree error concealment module.
Alternatively, as shown in Fig. 2 power control module can also be included in RNC.For the embodiment of the present invention, RNC can be with
Directly by the use of the power control control signal merged as open sea wharf, the CRC schools of the channel decoder in RNC can also be utilized
Result is tested not limit as open sea wharf, the embodiment of the present invention.
Alternatively, error concealment module can also be included in RNC, as can be seen from figures 8 and 9, the error concealing can be ginseng
Several levels error concealment module.
Alternatively, as shown in Fig. 2 power control module can also be included in RNC.For the embodiment of the present invention, RNC can be with
Directly by the use of the power control control signal that base station reports as open sea wharf, the channel decoder in RNC can also be utilized
CRC check result does not limit as open sea wharf, the embodiment of the present invention.
It is alternatively possible to strengthen the preset corresponding proportionality coefficient of decoder difference for the channel decoder in RNC and information source,
To realize that the decoding value exported respectively to channel decoder and information source enhancing decoder zooms in and out in proportion, so as to control
Channel decoder and information source enhancing decoder decode the weight corresponding to obtained decoding value respectively.
For the embodiment of the present invention, Figure 12 and Figure 13 are to carry out Joint Source Channel under arrowband AMR voice scenes to translate
Code, decode bit for A substream demodulations value, B subflows respectively and C subflows decoding bit has carried out respective handling.Need what is illustrated
It is the method for decoding provided in an embodiment of the present invention, is equally applicable to carry out Joint Source Channel under Wideband AMR speech scene
Decoding.Wherein, under Wideband AMR speech frame scene, the bit number of C subflows is 0.
In addition, when carrying out joint source-channel decoding under arrowband AMR voice scenes, respectively it is directed in Figure 12 and Figure 13
A substream demodulations value, B subflows decoding bit and C subflows decoding bit have carried out respective handling.It should be noted that the present invention is real
The method that the decoding of example offer is provided, respective handling only can also be carried out to A substream demodulations value, i.e., only the bit in A subflows be entered
The enhancing decoding of row information source；Bit can also be only decoded to A substream demodulations value and B subflows, and (or A substream demodulations value and C subflows decode
Bit) carry out respective handling, i.e., information source enhancing decoding is only carried out to the bit in A subflows and B subflows (or A subflows and C subflows).
For the embodiment of the present invention, Figure 12 and Figure 13 only carry out joint source-channel decoding to A subflows.Need what is illustrated
It is the method for decoding provided in an embodiment of the present invention, joint source-channel decoding only can also be carried out to B subflows；Can also be only
Joint source-channel decoding is carried out to C subflows；Message source and channel can also be carried out to any combination of A subflows, B subflows and C subflows
Joint decoding；Joint source-channel decoding can also be carried out to portion's bit in A subflows, B subflows and C subflows.
The method of decoding provided in an embodiment of the present invention, for UMTS system, RNC is first by channel decoder to base station
The demodulation value reported carries out channel decoding, obtains channel decoding value, or obtains base station and demodulation value is carried out on after channel decoding
The channel decoding value of report, then the channel decoding value is decrypted, information source increasing finally is carried out to the channel decoding value after decryption
Strong decoding, obtains joint source-channel decoding value.With being entered in a base station using channel decoder and information source enhancing decoder at present
Row joint source-channel decoding is compared, and the embodiment of the present invention can be deleted pair by the way that channel decoding value is decrypted in the rnc
Channel decoding value increased check bit when being encrypted, so as to realize information source enhancing decoder using inter-frame redundancy to letter
Road decoding value carries out information source enhancing decoding, and then can carry out letter in the UMTS system for needing RNC to carry out encryption and decryption to data
Source channel joint decoding.
Further, the method for decoding provided in an embodiment of the present invention, the solution by soft output channel decoder to merging
Tone pitch enters row decoding, can avoid causing estimate deviation to be present when estimating decoding value, so as to carry
Height enters the accuracy of row decoding to demodulation value；Decoder is strengthened to the channel decoding that decodes to obtain by channel decoder by information source
Value carries out information source enhancing decoding, is capable of the bit of the non-information source enhancing decoding of information source enhancing decoding portion channel decoder, Neng Gouti
Rise the BER performances of joint source-channel decoding value；Row decoding is entered to the demodulation value of merging by LVA decoders, it is possible to increase translate
Frame per second is deleted in code success rate, reduction；By distinguishing preset corresponding proportionality coefficient for each decoder in RNC, to realize to respectively translating
The decoding value and the decoding value of output of code device input zoom in and out in proportion, so as to control what each decoder for decoding obtained to translate
Weight corresponding to code value.
Illustrated as to method shown in Fig. 1, the method that the embodiment of the present invention provides another decoding, suitable for working as
When user equipment is in switch area, the joint source-channel decoding that is iterated, as shown in figure 14, methods described includes：
1401st, RNC carries out channel decoding to demodulation value, obtains channel decoding value.
Alternatively, step 1401 can be that RNC carries out channel decoding to demodulation value, obtain channel by channel decoder
Decoding value.
For the embodiment of the present invention, demodulation value can be the demodulation value after merging, and the demodulation value after the merging is at least two
The demodulation value that the demodulation value that individual base station reports obtains after merging.Now, can also include before step 1401：RNC is obtained
Demodulation value after merging.In embodiments of the present invention, when user equipment is in switch area, at least in the presence of two base stations and the use
Family equipment is communicated, and now, RNC obtains the demodulation value that each base station reports respectively, and these each base stations are reported respectively
Demodulation value merge, the demodulation value after being merged.Wherein, the demodulation value after merging can be to pass through channel in a base station
After decoder for decoding, demodulation value that CRC check does not pass through；Can also be after being decoded in a base station by channel decoder, to own
Demodulation value.In addition, RNC can also obtain any one of the demodulation value after merging, decoding value and decoding bit or any
Combination.
Alternatively, in the umts system, demodulation value can be the A substream demodulation values of AMR voices, and channel decoding value can be
The A subflow channel decoding values of AMR voices, joint source-channel decoding value can be that the A subflow Joint Source Channels of AMR voices are translated
Code value.Wherein, as shown in figure 4, for the AMR speech bits in UMTS system, according to importance from high to low suitable of bit
Sequence, it is divided into A subflows, B subflows and C subflows.Generally, most important A subflows can be protected by CRC code in AMR speech frames, and
The relatively low B subflows of importance and C subflows are not protected then by CRC code.In addition, channel is compiled used by voice transfer
Code is generally convolution coding.
For the embodiment of the present invention, channel decoder can be soft output channel decoder or hard decision channel decoder.
In embodiments of the present invention, when channel decoder is soft output channel decoder, channel decoding value can be that channel decoding is soft
Value, joint source-channel decoding value can be joint source-channel decoding soft value, and demodulation value can be demodulation soft value；When channel is translated
When code device is that hard decision exports channel decoder, channel decoding value can be channel decoding hard-decision values, and Joint Source Channel is translated
Code value can be joint source-channel decoding hard-decision values, and demodulation value can be demodulation hard-decision values.
Such as in Figure 15, RNC enters row decoding by soft output channel decoder to the demodulation soft value of merging.In Figure 15, RNC
The A substream demodulation soft values of merging are obtained first, then by soft output channel decoder, row decoding are entered to the demodulation soft value, obtained
To channel decoding soft value.
Again for example in Figure 16, RNC enters row decoding by hard decision channel decoder to the demodulation hard-decision values of merging.Figure 16
In, RNC obtains the A substream demodulation soft values of merging first, and then the demodulation soft value is translated by hard decision output decoder
Code obtains channel decoding hard-decision values, the channel decoding hard decision finally by soft value estimation module to hard decision output decoder
Value estimated, the channel decoding soft value estimated.Wherein, soft value estimation module refers to work as the change of channel in a short time
When little, the soft value amplitude of target bits is represented with several nearest demodulation soft value amplitudes relevant with estimation target.
For the embodiment of the present invention, soft value estimation module can be that voice coding modes are soft corresponding to 1/2 convolutional code
It is worth estimation module.In embodiments of the present invention, the corresponding description that soft value estimation module is estimated is referred to the correspondence in Fig. 3
Description, will not be repeated here.
Alternatively, RNC enters row decoding by soft output channel decoder to the demodulation value of merging.In the embodiment of the present invention
In, relative to the method estimated using hard decision channel decoder decoding value, by using soft output channel decoder
Enter row decoding, can avoid causing estimate deviation to be present when estimating decoding value, so as to improve pair
Demodulation value enters the accuracy of row decoding.
1402nd, RNC judges whether the CRC check of channel decoding value passes through.
For the embodiment of the present invention, merge gain, the solution that different base station reports respectively because the demodulation value after merging is present
Tone pitch there is a possibility that error is cancelled out each other during merging, therefore the demodulation value after to the merging carries out channel and translated
After code, obtained channel decoding value has that CRC check can be by.In embodiments of the present invention, at user equipment
At switch area, by channel decoding value carry out CRC check, can avoid when the CRC check of channel decoding value by when, information source
Enhancing decoder carries out repeating the situation of decoding to it, so as to improve decoding efficiency.
The 1403rd, if the CRC check of channel decoding value is by the way that channel decoding value is decrypted according to key stream by RNC.
Wherein, channel decoding value is that the demodulation value progress channel decoding reported by RNC to base station obtains, or channel decoding value
The channel decoding value for demodulation value report after channel decoding by base station received for RNC.Specifically, when channel decoding value
When demodulation value progress channel decoding to be reported by RNC to base station obtains, it can also include before step 1403：RNC obtains base
The demodulation value that station reports, and channel decoding is carried out to the demodulation value by channel decoder, obtain the channel decoding value；Work as channel
Decoding value be RNC receive by base station to demodulation value carry out channel decoding after report channel decoding value when, step 1403 it
Before can also include：RNC obtains the channel decoding value that base station reports.
For the embodiment of the present invention, when speech data is encrypted user equipment, the demodulation value that base station reports is to add
Close demodulation value, it is also equally the channel decoding value of encryption to enter the channel decoding value that row decoding obtains by channel decoder.
In the embodiment of the present invention, by the way that channel decoding value is decrypted, the channel decoding value after decryption can be sent into information source enhancing
Decoder.
1404th, RNC carries out information source enhancing decoding to the channel decoding value after decryption, obtains joint source-channel decoding value.
Alternatively, step 1404 can be that RNC strengthens decoder by information source, and the channel decoding value after decryption is carried out
Information source enhancing decoding, obtains joint source-channel decoding value.In embodiments of the present invention, RNC can also be reported by base station
Channel decoding value carries out joint source-channel decoding.Now, step 1401 can not perform, and the embodiment of the present invention does not limit.
Wherein, amount of redundant information be present between parameter of the information source enhancing decoder using consecutive frame during AMR voice codings
Feature, strengthen the input of decoder using the redundancy of the adjacent interframe of information source as information source, the performance of decoding value can be lifted.At this
In inventive embodiments, decoder is strengthened by information source information source enhancing decoding is carried out to the channel decoding value after decryption, can corrected
The uncorrected bit of local channel decoder, so as to lift the BER performances of joint source-channel decoding value.
For the embodiment of the present invention, RNC strengthens decoder by information source, the CRC check of channel decoding value can not passed through
Frame carry out information source enhancing decoding, all frames of channel decoding value can also be carried out information source enhancing decoding, the present invention implement
Example does not limit.
For the embodiment of the present invention, information source strengthens decoder strengthens algorithm to the progress information source increasing of channel decoding value by information source
Strong decoding.Wherein, information source enhancing algorithm can be the message source and channel message source and channels such as SCCD algorithms, SBSD algorithms or ISCD algorithms connection
Close decoding algorithm.
For the embodiment of the present invention, information source strengthens decoder and carries out the specific of joint source-channel decoding by SBSD algorithms
Process may be referred to the corresponding description in Fig. 1, will not be repeated here.
1405th, joint source-channel decoding value is encrypted RNC.
For the embodiment of the present invention, it is that the demodulation value progress channel reported by RNC to base station is translated that can work as channel decoding value
When code obtains, step 1405 is performed.
For the embodiment of the present invention, when RNC is iterated joint source-channel decoding, if encryption function is opened, need
Joint source-channel decoding value caused by strengthening decoder for decoding to information source is encrypted, as shown in Figure 15 and Figure 16.
In embodiments of the present invention, because channel decoder enters row decoding to the demodulation value of encryption, information source strengthens decoder to decryption
Channel decoding value enters row decoding, therefore when being iterated joint source-channel decoding, by strengthening decoder information source to information source
The joint source-channel decoding value obtained after enhancing decoding is encrypted, and can realize information source of the channel decoder to encryption
Channel joint decoding value is iterated decoding, and joint source-channel decoding is iterated in the rnc so as to realize.
1406th, RNC is iterated decoding to demodulation value, obtains iteration according to the joint source-channel decoding value of encryption
Channel decoding value.
Alternatively, step 1406 can be, RNC is according to the joint source-channel decoding value of encryption, by channel decoder,
Decoding is iterated to demodulation value, obtains the channel decoding value of iteration.
Wherein, channel decoder can be soft output channel decoder or hard decision channel decoder.Implement in the present invention
In example, when channel decoder is soft output channel decoder, channel decoding value can be channel decoding soft value, and message source and channel joins
It can be joint source-channel decoding soft value to close decoding value, and demodulation value can be demodulation soft value；When channel decoder is hard decision
When exporting channel decoder, channel decoding value can be channel decoding hard-decision values, and joint source-channel decoding value can be letter
Source channel joint decoding hard-decision values, demodulation value can be demodulation hard-decision values.
Such as in Figure 15, RNC enters row decoding by soft output channel decoder to the demodulation soft value of merging.In Figure 15, RNC
The A substream demodulation soft values of merging are obtained first, then by soft output channel decoder, row decoding are entered to the demodulation soft value, obtained
To channel decoding soft value.
Again for example in Figure 16, RNC enters row decoding by hard decision channel decoder to the demodulation hard-decision values of merging.Figure 16
In, RNC obtains the A substream demodulation soft values of merging first, and then the demodulation soft value is translated by hard decision output decoder
Code obtains channel decoding hard-decision values, the channel decoding hard decision finally by soft value estimation module to hard decision output decoder
Value estimated, the channel decoding soft value estimated.Wherein, soft value estimation module refers to work as the change of channel in a short time
When little, the soft value amplitude of target bits is represented with several nearest demodulation soft value amplitudes relevant with estimation target.
1407th, RNC is iterated information source enhancing decoding to the channel decoding value of iteration, obtains the Joint Source Channel of iteration
Decoding value.
Alternatively, step 1407 can be that RNC strengthens decoder by information source, and the channel decoding value of iteration is changed
Strengthen for information source and decode, obtain the joint source-channel decoding value of iteration.
For the embodiment of the present invention, when RNC is iterated joint source-channel decoding, information source enhancing decoder can be adopted
Carry out message source and channel joint source-channel decoding with SBSD algorithms, now, information source enhancing decoder need not export value of feedback (or will
0) value of feedback is set to；Information source enhancing decoder can also use ISCD algorithms to carry out message source and channel joint source-channel decoding, this
When, information source strengthens the information that decoder will be calculated in every wheel iterative process, feeds back to channel decoder.Wherein, value of feedback
Can be feedback soft value or feedback hard-decision values.
If the 1408, RNC determines iteration ends, RNC exports final joint source-channel decoding value.
Wherein, the final joint source-channel decoding value is after RNC last times are iterated information source enhancing decoding, to obtain
The joint source-channel decoding value of the iteration arrived.
For the embodiment of the present invention, carry out non-iterative Joint Source Channel with channel decoder and information source enhancing decoder and translate
Code-phase ratio, the embodiment of the present invention strengthen decoder by channel decoder and information source and are iterated joint source-channel decoding, by
During iteration joint source-channel decoding, channel decoder is repeatedly decoded according to value of feedback, and information source enhancing is translated
The obtained channel decoding value that decodes multiple to channel decoder carries out information source enhancing decoding, therefore final message source and channel to code device respectively
Joint decoding value compared with decoding obtained joint source-channel decoding value for the first time, it is possible to increase MOS performances, so as to lift use
Subjective feeling of the family for voice messaging；BLER performances can be reduced simultaneously, so as to reduce block wrong in sound transmission course
Rate.
Alternatively, step 1408 can also be：If RNC determines joint source-channel decoding, value cyclic redundancy CRC check is led to
Cross, then RNC exports final joint source-channel decoding value.
For the embodiment of the present invention, by the joint source-channel decoding value for strengthening information source the iteration that iterative decoding obtains
Carry out CRC check, and when iteration the CRC check of joint source-channel decoding value by when, translated as final Joint Source Channel
Code value, the decoding accuracy of final joint source-channel decoding value can be ensured.
Alternatively, step 1408 can be：If RNC determines that iterations is equal to preset threshold value, the final letter of RNC outputs
Source channel joint decoding value.
Wherein, preset threshold value can be configured in advance by RNC, and the preset threshold value is translated to be iterated Joint Source Channel
Maximum iteration during code.For example, the preset threshold value that RNC is configured in advance can be that 5 times, 8 times or 13 are inferior.
For the embodiment of the present invention, increased by when iterations is equal to preset threshold value, terminating channel decoder and information source
The joint iterative decoding process of strong decoder, can avoid the excessive situation of iterations, so as to reduce iteration information source letter
The complexity of road joint decoding.
For the embodiment of the present invention, as shown in Fig. 2 RNC includes：Channel decoder, information source enhancing decoder, decryption key
Flow maker.Alternatively, can also include in RNC：Power control module and/or decoding Effective judgement module etc..
Wherein, channel decoder can be VA decoders or LVA decoders etc..Preferably, by LVA decoders to merging
Demodulation value carry out channel decoding.In embodiments of the present invention, L bar optimal sequences before being exported due to LVA decoders, and it is right
These sequences carry out CRC check successively, only when this L bar sequence C RC verify it is obstructed out-of-date, just think the CRC check of present frame
Mistake, therefore channel decoding is carried out to the demodulation value of merging relative to using VA decoders, by using LVA decoders to merging
Demodulation value enter row decoding, it is possible to increase decoding success rate, reduction delete frame per second.
Alternatively, can also include after step 1408：RNC judges joint source-channel decoding value according to presetting rule
Rationally whether, if joint source-channel decoding value is unreasonable, RNC carries out information source enhancing to joint source-channel decoding value and translated
Code.
Wherein, presetting rule can be rule corresponding to the redundancy of the adjacent interframe of joint source-channel decoding value.
For the embodiment of the present invention, as shown in Fig. 2 can also be hidden including decoding Effective judgement module and mistake in RNC
Module is hidden, the decoding Effective judgement module is used for according to presetting rule, and the reasonability of joint source-channel decoding value is carried out
Judge.In embodiments of the present invention, as shown in Figure 15 and Figure 16, the error concealing can be parametric degree error concealment module.
Alternatively, error concealment module can also be included in RNC, as shown in Figure 15 and Figure 16, the error concealing can be
Parametric degree error concealment module.
Alternatively, as shown in Fig. 2 power control module can also be included in RNC.For the embodiment of the present invention, RNC can be with
Directly by the use of the power control control signal merged as open sea wharf, the CRC schools of the channel decoder in RNC can also be utilized
Result is tested not limit as open sea wharf, the embodiment of the present invention.
It is alternatively possible to strengthen the preset corresponding proportionality coefficient of decoder difference for the channel decoder in RNC and information source,
To realize that the decoding value exported respectively to channel decoder and information source enhancing decoder zooms in and out in proportion, so as to control
Channel decoder and information source enhancing decoder decode the weight corresponding to obtained decoding value respectively.
For the embodiment of the present invention, Figure 15 and Figure 16 are that message source and channel connection is iterated under arrowband AMR voice scenes
Decoding is closed, bit is decoded for A substream demodulations value, B subflows respectively and C subflows decoding bit has carried out respective handling.Need
It is bright, the method for decoding provided in an embodiment of the present invention, it is equally applicable to carry out message source and channel under Wideband AMR speech scene
Joint decoding.Wherein, under Wideband AMR speech frame scene, the bit number of C subflows is 0.
In addition, when being iterated joint source-channel decoding under arrowband AMR voice scenes, in Figure 15 and Figure 16 respectively
Respective handling has been carried out for A substream demodulations value, B subflows decoding bit and C subflows decoding bit.It should be noted that this hair
The method for the decoding that bright embodiment provides, respective handling only can also be carried out to A substream demodulations value, i.e., only to the ratio in A subflows
Spy carries out information source enhancing decoding；Bit (or A substream demodulations value and C subflows can also be only decoded to A substream demodulations value and B subflows
Decode bit) carry out respective handling, i.e., information source enhancing only is carried out to the bit in A subflows and B subflows (or A subflows and C subflows)
Decoding.
For the embodiment of the present invention, Figure 15 and Figure 16 are only iterated joint source-channel decoding to A subflows.Need
It is bright, the method for decoding provided in an embodiment of the present invention, joint source-channel decoding only can also be carried out to B subflows；May be used also
Only to carry out joint source-channel decoding to C subflows；Information source can also be carried out to any combination of A subflows, B subflows and C subflows
Channel joint decoding；Joint source-channel decoding can also be carried out to portion's bit in A subflows, B subflows and C subflows.
The method of decoding provided in an embodiment of the present invention, for UMTS system, RNC is first by channel decoder to base station
The demodulation value reported carries out channel decoding, obtains channel decoding value, or obtains base station and demodulation value is carried out on after channel decoding
The channel decoding value of report, then the channel decoding value is decrypted, information source increasing finally is carried out to the channel decoding value after decryption
Strong decoding, obtains joint source-channel decoding value.With being entered in a base station using channel decoder and information source enhancing decoder at present
Row joint source-channel decoding is compared, and the embodiment of the present invention can be deleted pair by the way that channel decoding value is decrypted in the rnc
Channel decoding value increased check bit when being encrypted, so as to realize information source enhancing decoder using inter-frame redundancy to letter
Road decoding value carries out information source enhancing decoding, and then can carry out letter in the UMTS system for needing RNC to carry out encryption and decryption to data
Source channel joint decoding.
Further, the method for decoding provided in an embodiment of the present invention, the Joint Source Channel for passing through CRC check is passed through
Decoding value can ensure the decoding accuracy of final joint source-channel decoding value as final joint source-channel decoding value；
By the joint iterative decoding mistake for when iterations is equal to preset threshold value, terminating channel decoder and information source enhancing decoder
Journey, the excessive situation of iterations can be avoided, so as to reduce the complexity of iteration joint source-channel decoding；By working as
When carrying out iteration joint source-channel decoding first, information source enhancing decoder is directly translated the decoding value progress information source enhancing of merging
Code, can avoid a channel decoder from entering the process of row decoding, so as to save resource；Pass through soft output channel decoder
Row decoding is entered to the demodulation value of merging, can avoid causing estimate deviation to be present when estimating decoding value,
So as to improve the accuracy for entering row decoding to demodulation value；Decoder is strengthened to decoding to obtain by channel decoder by information source
Channel decoding value carry out information source enhancing decoding, be capable of the ratio of information source enhancing decoding portion channel decoder non-information source enhancing decoding
Spy, the BER performances of joint source-channel decoding value can be lifted.
Further, also carried as the realization to method shown in Fig. 1, Fig. 3, Fig. 7, Figure 11 and Figure 14, the embodiment of the present invention
A kind of RNC, the RNC has been supplied to run in UMTS, as shown in figure 18, the RNC includes：Decryption unit 181, information source enhancing are translated
Code device 182, output unit 183.
Decryption unit 181, for channel decoding value to be decrypted.
Wherein, channel decoding value is that the demodulation value progress channel decoding reported by RNC to base station obtains, or channel decoding value
The channel decoding value for demodulation value report after channel decoding by base station received for RNC.
Information source strengthens decoder 182, and carrying out information source enhancing for the channel decoding value after being decrypted to decryption unit 181 translates
Code, obtains joint source-channel decoding value.
Output unit 183, obtained joint source-channel decoding value is decoded for exporting information source enhancing decoder 182.
Further, as shown in figure 19, when channel decoding value is that the demodulation value reported by RNC to base station carries out channel decoding
When obtaining, the RNC can also include：Ciphering unit 191, channel decoder 192.
Ciphering unit 191, the joint source-channel decoding obtained for strengthening information source the enhancing decoding of the information source of decoder 182
Value is encrypted.
Channel decoder 192, for the joint source-channel decoding value encrypted according to ciphering unit 191, demodulation value is entered
Row iteration channel decoding, obtain the channel decoding value of iteration.
Decryption unit 181, it is additionally operable to that the turbo channel decoder value that the decoding of channel decoder 192 obtains is decrypted.
Information source strengthens decoder 182, is additionally operable to the turbo channel decoder value after being decrypted to decryption unit 181 and is iterated letter
Source enhancing decoding, obtains iteration joint source-channel decoding value.
Output unit 183, specifically for when RNC determines iteration ends, exporting final joint source-channel decoding value.
Wherein, final joint source-channel decoding value is that the information source enhancing last time of decoder 182 is iterated information source increasing
After strong decoding, obtained iteration joint source-channel decoding value.
Output unit 183, specifically for when RNC determines that iterations is equal to preset threshold value, exporting final message source and channel
Joint decoding value.
Output unit 183, specifically it is additionally operable to when RNC determines that joint source-channel decoding value cyclic redundancy CRC check passes through
When, export final joint source-channel decoding value.
Channel decoder 192 carries out the demodulation value of channel decoding as the demodulation value after merging, and the demodulation value after the merging is
The demodulation value that the demodulation value that at least two base stations report obtains after merging.
Alternatively, the RNC can also include：Judging unit 193.
Judging unit 193, for judging whether is channel decoding value CRC check that the channel decoding of channel decoder 192 obtains
Pass through.
Decryption unit 181, specifically for judging that channel decoding value CRC check is obstructed out-of-date when judging unit 193, according to close
Key stream, channel decoding value is decrypted.
The demodulation value that channel decoder 192 carries out channel decoding is the A substream demodulation values of AMR voices；
Channel decoder 192 decodes the A subflow channel decoding values that the obtained channel decoding value is AMR voices；
Information source enhancing decoder 182 decodes the A subflow information sources that the obtained joint source-channel decoding value is AMR voices
Channel joint decoding value.
RNC provided in an embodiment of the present invention, UMTS system is run on, decryption unit first is translated channel according to key stream
Code value is decrypted, and the channel decoding value after then information source enhancing decoder is decrypted to decryption unit carries out information source enhancing decoding,
Obtain joint source-channel decoding value, the information source obtained after last output unit output information source enhancing decoder information source enhancing decoding
Channel joint decoding value.With carrying out Joint Source Channel using channel decoder and information source enhancing decoder in a base station at present and translating
Code-phase ratio, the embodiment of the present invention can delete and channel decoding value added by the way that channel decoding value is decrypted in the rnc
Increased check bit when close, so as to realize that information source enhancing decoder carries out information source using inter-frame redundancy to channel decoding value
Enhancing decoding, and then joint source-channel decoding can be carried out in the UMTS system for needing RNC to carry out encryption and decryption to data.
Further, RNC provided in an embodiment of the present invention, the joint source-channel decoding value for passing through CRC check is passed through
As final joint source-channel decoding value, the decoding accuracy of final joint source-channel decoding value can be ensured；By working as
When iterations is equal to preset threshold value, terminate the joint iterative decoding process of channel decoder and information source enhancing decoder, can
The situation that iterations is excessive is avoided, so as to reduce the complexity of iteration joint source-channel decoding；By first when carrying out
During secondary iteration joint source-channel decoding, the decoding value progress information source enhancing that information source enhancing decoder directly reports to base station is translated
Code, can avoid a channel decoder from entering the process of row decoding, so as to save resource；Pass through soft output channel decoder
Row decoding is entered to the demodulation value that base station reports, causes deviation be present when can avoid estimating decoding value, so as to
The accuracy for entering row decoding to demodulation value can be improved；Decoder is strengthened to the letter that decodes to obtain by channel decoder by information source
Road decoding value carries out information source enhancing decoding, is capable of the bit of the non-information source enhancing decoding of information source enhancing decoding portion channel decoder,
The BER performances of joint source-channel decoding value can be lifted.
It should be noted that other corresponding descriptions in the RNC provided in the embodiment of the present invention corresponding to each functional unit,
The corresponding description in Fig. 1, Fig. 3, Fig. 7, Figure 11 and Figure 14 is may be referred to, will not be repeated here.
RNC provided in an embodiment of the present invention can realize the embodiment of the method for above-mentioned offer, and concrete function is realized and referred to
Explanation in embodiment of the method, will not be repeated here.The method and RNC of decoding provided in an embodiment of the present invention go for pair
The demodulation value that base station reports carries out message source and channel joint source-channel decoding, but is not limited only to this.
One of ordinary skill in the art will appreciate that realize all or part of flow in above-described embodiment method, being can be with
The hardware of correlation is instructed to complete by computer program, described program can be stored in a computer read/write memory medium
In, the program is upon execution, it may include such as the flow of the embodiment of above-mentioned each method.Wherein, described storage medium can be magnetic
Disk, CD, read-only memory (Read-Only Memory, ROM) or random access memory (Random Access
Memory, RAM) etc..
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, the change or replacement that can readily occur in, all should
It is included within the scope of the present invention.Therefore, protection scope of the present invention should be defined by scope of the claims.
Claims (10)
- A kind of 1. method of decoding, for Universal Mobile Telecommunications System UMTS, it is characterised in that methods described includes：Channel decoding value is decrypted radio network controller (RNC), and the channel decoding value is that base station is reported by the RNC Demodulation value carry out channel decoding obtain, or the channel decoding value be the RNC receive by the base station to demodulation value Carry out the channel decoding value reported after channel decoding；The redundancy when RNC utilizes AMR voice codings between the parameter of consecutive frame, enters to the channel decoding value after decryption The enhancing decoding of row information source, obtains joint source-channel decoding value；The RNC exports the joint source-channel decoding value.
- 2. the method for decoding according to claim 1, it is characterised in that the channel decoding value is to base by the RNC When the demodulation value progress channel decoding that station reports obtains, the RNC carries out information source enhancing decoding to the channel decoding value after decryption, After the step of obtaining joint source-channel decoding value, in addition to：The joint source-channel decoding value is encrypted the RNC；The RNC is iterated channel decoding to the demodulation value, obtains iteration according to the joint source-channel decoding value of encryption Channel decoding value；The turbo channel decoder value is decrypted the RNC, and is iterated letter to the turbo channel decoder value after decryption Source enhancing decoding, obtains iteration joint source-channel decoding value；The step of RNC outputs joint source-channel decoding value, includes：If the RNC determines iteration ends, the RNC exports final joint source-channel decoding value, the final information source letter Road joint decoding value is that obtained iteration Joint Source Channel is translated after RNC last times are iterated information source enhancing decoding Code value.
- 3. the method for decoding according to claim 2, it is characterised in that if the RNC determines iteration ends, institute Stating the step of RNC exports final joint source-channel decoding value includes：If the RNC determines that iterations is equal to preset threshold value, the RNC exports the final joint source-channel decoding Value；OrIf the RNC determines the joint decoding value cyclic redundancy CRC check by the way that the RNC exports the final information source Channel joint decoding value.
- 4. the method for decoding according to any one of claims 1 to 3, it is characterised in that the demodulation value is the solution after merging Tone pitch, the demodulation value that the demodulation value after the merging obtains after being merged for the demodulation value that at least two base stations report；Before the step of channel decoding value is decrypted the RNC, in addition to：The RNC judges whether the channel decoding value CRC check passes through；The step of channel decoding value is decrypted the RNC includes：If the channel decoding value CRC check is by the way that channel decoding value is decrypted the RNC.
- 5. the method for decoding according to claim 4, it is characterised in that the demodulation value is A substream demodulation values；The channel decoding value is the A subflow channel decoding values of AMR voices；The joint source-channel decoding value is the A subflow joint source-channel decoding values of AMR voices.
- 6. a kind of radio network controller (RNC), run in Universal Mobile Telecommunications System UMTS, it is characterised in that the RNC bags Include：Decryption unit, for channel decoding value to be decrypted, the channel decoding value is the solution reported by the RNC to base station Tone pitch carries out channel decoding and obtained, or the channel decoding value is carried out for what the RNC was received by the base station to demodulation value The channel decoding value reported after channel decoding；Information source strengthens decoder, single to the decryption for the redundancy between the parameter using consecutive frame during voice coding Channel decoding value after member decryption carries out information source enhancing decoding, obtains joint source-channel decoding value；Output unit, the joint source-channel decoding value obtained for exporting the information source enhancing decoder for decoding.
- 7. RNC according to claim 6, it is characterised in that the channel decoding value is reported by the RNC to base station When demodulation value progress channel decoding obtains, the RNC also includes：Ciphering unit；The ciphering unit, for adding to the joint source-channel decoding value after information source enhancing decoder for decoding It is close；The channel decoder, for the joint source-channel decoding value encrypted according to the ciphering unit, to the demodulation value Channel decoding is iterated, obtains turbo channel decoder value；The decryption unit, it is additionally operable to that the turbo channel decoder value that the channel decoder decodes to obtain is decrypted；The information source strengthens decoder, is additionally operable to the turbo channel decoder value after being decrypted to the decryption unit and is iterated information source Enhancing decoding, obtains iteration joint source-channel decoding value；The output unit, specifically for when the RNC determines iteration ends, exporting final joint source-channel decoding value, After the final joint source-channel decoding value is iterated information source enhancing decoding for information source enhancing decoder last time, Obtained iteration joint source-channel decoding value.
- 8. RNC according to claim 7, it is characterised in thatThe output unit, specifically for when the RNC determines that iterations is equal to preset threshold value, exporting the final information source Channel joint decoding value；The output unit, specifically it is additionally operable to when the RNC determines the joint source-channel decoding value cyclic redundancy CRC check By when, export the final joint source-channel decoding value.
- 9. according to any described RNC of claim 6 to 8, it is characterised in thatThe channel decoder carries out the demodulation value of channel decoding as the demodulation value after merging, the demodulation value after the merging The demodulation value that the demodulation value reported at least two base stations obtains after merging；The RNC also includes：Judging unit；The judging unit, for judging that the channel decoding value CRC check that the channel decoder channel decoding obtains is It is no to pass through；The decryption unit, specifically for judging that the channel decoding value CRC check is obstructed out-of-date when the judging unit, to letter Road decoding value is decrypted.
- 10. RNC according to claim 9, it is characterised in thatThe demodulation value that the channel decoder carries out channel decoding is the A substream demodulation values of multi-velocity self-adapting AMR voices；The channel decoding value that the channel decoder decodes to obtain is the A subflow channel decoding values of AMR voices；The joint source-channel decoding value that the information source enhancing decoder for decoding obtains is believed for the A subflows information source of AMR voices Road joint decoding value.
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| CN103746773A (en) * | 2013-12-31 | 2014-04-23 | 深圳信息职业技术学院 | Method and system for correcting errors of decoded data by using UMTS (Universal Mobile Telecommunications System) receiver |
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| CN103746773A (en) * | 2013-12-31 | 2014-04-23 | 深圳信息职业技术学院 | Method and system for correcting errors of decoded data by using UMTS (Universal Mobile Telecommunications System) receiver |
Non-Patent Citations (1)
| Title |
|---|
| 3GPP UMTS和LTE系统中的信道译码算法研究;魏岳军;《中国博士学位论文全文数据库信息科技辑》;20130815;说明书正文第67页图5-5、第70-71页、第73页 * |
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