CN103152125B - The blind checking method of control information in LTE system and device - Google Patents
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Abstract
The blind checking method of control information in LTE system and device, the method comprising the steps of: obtain the data after separating channel interleaving to the Data Analysis process that each reception antenna in base station receives; From the data after described solution channel interleaving, in scrambler sequence, in the position that ack/nack signal punches to business datum, obtain ACK/NACK Soft Inform ation undetermined, scrambler to ack/nack signal scrambling respectively; Judge described ACK/NACK Soft Inform ation undetermined whether as ack/nack signal according to predetermined filtering judgment condition, described scrambler, described predetermined filtering judgment condition is according to the feature setting in planisphere position after ack/nack signal modulation.The present invention program takes full advantage of feature on planisphere position after ack/nack signal modulation, thus effectively can reduce false alarm probability, meets the performance requirement of false alarm probability and false dismissal probability simultaneously.
Description
Technical field
The present invention relates to the blind Detecting device of control information in the blind checking method of control information in a kind of LTE system, a kind of LTE system.
Background technology
3G long evolving system (LongTermEvolution, LTE) improve and enhance the aerial access technology of 3G system, adopt OFDM (OrthogonalFrequencyDivisionMultiplexing, OFDM) technology, single-carrier frequency division multiple access access technology (SingleCarrier-FrequencyDivisionMultipleAccess, and multiple-input and multiple-output (MultipleInputMultipleOutput SC-FDMA), MIMO) technology is as its key technology for PHY, effectively improve the performance of Cell Edge User, improve cell capacity and reduce system delay.
Hybrid automatic repeat-request (HybridAutomaticRepeatRequest, HARQ) mechanism is the important leverage preventing data-bag lost in LTE system.Before transmitting data bag, first send designator, relative transmission times and some other emission characteristics are notified the user by Received signal strength by this designator.User often receives a packet, all will send response signal: if correctly receive this bag, then user's transmitting acknowledgement (ACK) signal; If correctly do not receive this bag, then user sends one and denies (NACK) signal.User does not likely detect the indicator signal from base station.In the case, user can not receive corresponding packet, then user can carry out discontinuous transmission (DiscontinuousTransmission, DXT), and namely user does not launch any signal.That is, only have when user receives packet, just launch ack/nack signal, otherwise do not launch ack/nack signal.Accordingly, first the demodulating process of base station to targeted customer ACK or NACK signal will judge whether have ack/nack signal, namely carries out blind Detecting to uplink ACK/NACK signal, if detected that ack/nack signal carries out demodulation to it again.Ack/nack signal is very important in HARQ mechanism, so need the blind checking method for base station design high efficient and reliable, the false alarm probability of guarantee ACK/NACK and false dismissal probability reach the performance standard that 3GPP organizes to set up simultaneously.
In LTE system, the ack/nack signal that user sends can be carried by Physical Uplink Control Channel PUCCH or Physical Uplink Shared Channel PUSCH.
The first situation, ack/nack signal is carried by PUCCH.PUCCH, only for the transmission of control information, is divided into form 1a/1b/2a/2b tetra-kinds of form loading ACK/NACK signal, form 1a/1b loading ACK/NACK signal, form 2a/2b Bearer Channel quality indicator (CQI) and ack/nack signal.
The second situation, ack/nack signal is carried by PUSCH.PUSCH is used for transmitting uplink data, the transferring content of the Different Logic channel from upper strata can be carried, comprise control information, customer service signal and broadcast service information, ack/nack signal after channel coding process again with coding after business information carry out transmitting uplink data through processes such as channel interleaving, scrambling, modulation, up precoding, resource mapping, SC-FDMA generate by PUSCH successively.
The TS36.212 agreement organized to set up according to 3GPP, the ack/nack signal of the upper transmission of PUSCH carries out chnnel coding, and after coding, the number Q' of ACK/NACK symbol is by following formula) determine:
Wherein, O is ACK/NACK original bit number,
refer to the sub-carrier number that same transmission block, initial p USCH transmission are used,
refer to the SC-FDMA symbolic number that initial p USCH transmission in same transmission block, a subframe is used;
for bias factor; C is code block number; K
rit is the bit number of r code block;
for the transmission block scheduling bandwidth that present sub-frame is corresponding, represent by the number of subcarrier.
Ack/nack signal total bit number after coding is: Q
aCK=Q
mq', for QPSK, Q
mbe 2, for 16QAM, Q
mbe 4, for 64QAM, Q
mbe 6.
If ack/nack signal bit number is 1, such as, use
represent, ACK is expressed as bit " 1 ", and NACK is expressed as bit " 0 ", and concrete coding method is as shown in the table, and wherein x, y are for retaining position;
The cascade of multiple ACK/NACK encoding block is obtained sequence
wherein Q
aCKfor total length.
When ack/nack signal transmits on PUSCH, will punch to business datum in channel interleaving processes, at fixing resource location, sequence
directly replace original bits of traffic data, form new business datum.In scrambling processes, bit sequence in new business datum and known array are carried out the operation that mould 2 adds, in addition, reservation position x, y of producing in special processing ack/nack signal cataloged procedure, wherein x is set to bit 1, y is set to the bit identical with previous adjacent position scrambler bits, and the object of special processing is the Euclidean distance maximizing ACK/NACK modulation symbol, reduces receiving terminal probability of failure.After scrambling, all bit sequences are sent on PUSCH through processes such as ovennodulation, up precoding, resource mapping, SC-FDMA generations successively.Above process concrete operations provide in 3GPPTS36.211, TS36.212 agreement.
3GPP Its Relevant Technology Standards defines the demodulation performance requirement of ACK/NACK control information on PUSCH, define false alarm probability and false dismissal probability, wherein false alarm probability P (DXT->ACKorNACK) represents transmission DXT, is the probability of ACK/NACK by error detection; False dismissal probability P (ACK->DXTorNACK) represents when sending ACK, by the probability of error detection, and defines false alarm probability and false dismissal probability is all no more than 10
-2.
In prior art, mainly judge whether there is ack/nack signal in Received signal strength by signal to noise ratio, be specially: on PUCCH channel, Received signal strength is carried out relevant to targeted customer's basic sequence of precognition, ask for correlation peak, judge whether targeted customer sends ack/nack signal according to correlation peak size, this method effectively can distinguish ack/nack signal and DXT signal for PUCCH, its reason is that PUCCH format 1a/1b is not when sending ack/nack signal, Received signal strength only has noise, correlation peak size when correlation peak and PUCCH format 1a/1b send ack/nack signal has obvious difference.But this method is not also suitable for the situation that PUSCH sends ack/nack signal.On PUSCH channel, ack/nack signal transmits after punching to service signal, when not sending ack/nack signal, the resource of original transferring ACK/NACK signal still have service signal to transmit, if adopt existing SNR method to judge whether PUSCH has ack/nack signal, easily service signal is mistaken for ack/nack signal, causes false alarm probability to promote.
Summary of the invention
For above-mentioned problems of the prior art, the object of the present invention is to provide the blind Detecting device of control information in the blind checking method of control information in a kind of LTE system, a kind of LTE system, it can realize the accurate detection to ack/nack signal, it effectively can reduce false alarm probability, meets the performance requirement of false alarm probability and false dismissal probability simultaneously.
For achieving the above object, the present invention by the following technical solutions:
A blind checking method for control information in LTE system, comprises step:
Data after separating channel interleaving are obtained to the Data Analysis process that each reception antenna in base station receives;
From the data after described solution channel interleaving, in scrambler sequence, in the position that ack/nack signal punches to business datum, obtain ACK/NACK Soft Inform ation undetermined, scrambler to ack/nack signal scrambling respectively;
Judge described ACK/NACK Soft Inform ation undetermined whether as ack/nack signal according to predetermined filtering judgment condition, described scrambler, described predetermined filtering judgment condition is according to the feature setting in planisphere position after ack/nack signal modulation.
A blind Detecting device for control information in LTE system, comprising:
Resolution unit, the Data Analysis process for receiving each reception antenna in base station obtains the data after separating channel interleaving;
The information extraction unit be connected with resolution unit, for from the data after described solution channel interleaving, in scrambler sequence, in the position that ack/nack signal punches to business datum, obtain ACK/NACK Soft Inform ation undetermined, scrambler to ack/nack signal scrambling respectively;
The identifying unit be connected with information extraction unit, for judging described ACK/NACK Soft Inform ation undetermined according to predetermined filtering judgment condition, described scrambler whether as ack/nack signal, described predetermined filtering judgment condition is according to the feature setting in planisphere position after ack/nack signal modulation.
According to the scheme of the invention described above, it is after obtaining the data after separating channel interleaving, data after separating channel interleaving, the ack/nack signal of scrambler sequence obtains ACK/NACK Soft Inform ation undetermined respectively to the position that business datum is punched, to the scrambler of ack/nack signal scrambling, and according to predetermined filtering judgment condition, the scrambler of gained judges ACK/NACK Soft Inform ation undetermined whether as ack/nack signal, and predetermined filtering judgment condition sets according to the feature in planisphere position after ack/nack signal modulation, take full advantage of feature on planisphere position after ack/nack signal modulation, thus effectively can reduce false alarm probability, meet the performance requirement of false alarm probability and false dismissal probability simultaneously.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of the blind checking method embodiment of control information in LTE system of the present invention;
Fig. 2 carries out the schematic flow sheet that dissection process obtains the DATA Example after separating channel interleaving in Fig. 1;
Fig. 3 is the planisphere of the ack/nack signal information in a concrete example;
Fig. 4 is the structural representation of the blind Detecting device embodiment of control information in LTE system of the present invention.
Embodiment
Below in conjunction with concrete better embodiment, the present invention program is described in detail.
Shown in Figure 1, be the schematic flow sheet of the blind checking method embodiment of control information in LTE system of the present invention, it comprises step:
Step S101: the data after separating channel interleaving are obtained to the Data Analysis process that each reception antenna in base station receives, enters step S102;
Step S102: from the data after described solution channel interleaving, in scrambler sequence, in the position that ack/nack signal punches to business datum, obtain ACK/NACK Soft Inform ation undetermined, scrambler to ack/nack signal scrambling respectively, enter step S103, wherein, here scrambler sequence needs known scrambler sequence according to communication protocol, here ack/nack signal is also according to the known punch position of communication protocol to the position that business datum is punched, can directly use, can without the need to adopting ad hoc fashion to obtain;
Step S103: judge above-mentioned ACK/NACK Soft Inform ation undetermined whether as ack/nack signal according to predetermined filtering judgment condition, above-mentioned scrambler, predetermined filtering judgment condition is here according to the feature setting in planisphere position after ack/nack signal modulation.
Wherein, carrying out the process that dissection process obtains separating the data after channel interleaving in above-mentioned steps S101 can be adopt existing mode in prior art to carry out, illustrated in Fig. 2 and carried out the schematic flow sheet that dissection process obtains the DATA Example after separating channel interleaving, it comprises step:
Step S201: the data received each reception antenna in base station are carried out FFT conversion and obtained frequency-region signal;
Step S202: carry out solution resource mapping to the frequency-region signal obtained, obtains user's frequency-region signal by resource scheduling information, includes reference signal and user data in this user's frequency-region signal;
Step S203: according to the reference signal on described user's frequency-region signal, channel estimating is carried out to subscriber channel and obtain channel estimation value;
Step S204: equilibrium treatment is carried out to user's frequency-region signal according to described channel estimation value;
Step S205: diversity merging is carried out to user's frequency-region signal of each antenna of user after equilibrium treatment;
Step S206: IDFT is carried out to the user's frequency-region signal after diversity merging and is transformed to user's time domain data;
Step S207: soft demodulation is carried out to user's time domain data and obtains Soft Inform ation, Soft Inform ation here refers to the logarithm value of the probability institute total that the probability that reception bit is 1 is 0 divided by reception bit;
Step S208: Soft Inform ation is carried out separating channel interleaving and obtains the data after separating channel interleaving.
According to the scheme of the invention described above, it is after obtaining the data after separating channel interleaving, data after separating channel interleaving, the ack/nack signal of scrambler sequence obtains ACK/NACK Soft Inform ation undetermined respectively to the position that business datum is punched, to the scrambler of ack/nack signal scrambling, and according to predetermined filtering judgment condition, the scrambler of gained judges ACK/NACK Soft Inform ation undetermined whether as ack/nack signal, and predetermined filtering judgment condition sets according to the feature in planisphere position after ack/nack signal modulation, take full advantage of feature on planisphere position after ack/nack signal modulation, thus effectively can reduce false alarm probability, meet the performance requirement of false alarm probability and false dismissal probability simultaneously.
Wherein, when feature in planisphere position after modulating according to ack/nack signal sets predetermined filtering judgment condition, this predetermined filtering judgment condition can be any one or the combination in any that comprise in following four conditions, under preferable case, can be meet following four conditions simultaneously, can realize judging accurately:
Be greater than or equal to the first set point according to scrambler to the ratio of the root-mean-square value of income value and ACK/NACK Soft Inform ation undetermined after ACK/NACK Soft Inform ation undetermined descrambling, the first set point is here greater than 0;
After ACK/NACK Soft Inform ation undetermined is transformed to the sub-encoding block of multiple ACK/NACK, the number sum that in the sub-encoding block of each ACK/NACK, front two Soft Inform ation symbol is identical is greater than or equal to the second set point, and the second set point is here greater than 0;
After ACK/NACK Soft Inform ation undetermined is transformed to the sub-encoding block of multiple ACK/NACK, 3rd ~ Q in the sub-encoding block of each ACK/NACK
min position, symbol is that positive number sum is greater than or equal to the 3rd set point, Q here
mfor the order of modulation on PUSCH, the 3rd set point is here greater than 0;
According to scrambler to the symbol of income value after ACK/NACK Soft Inform ation descrambling undetermined and be greater than or equal to the 4th set point, the 4th set point is here greater than 0.
According to the invention described above scheme, carry out illustrated in greater detail with one of them specific embodiment below.In this specific embodiment, be described for the blind Detecting of ACK/NACK control information on PUSCH, and suppose that the ack/nack signal of 1 bit transmits on the LTE system PUSCH of 15.36MHz sample rate, wherein, LTE system is configured to TS36.141 agreement appendix A fixed reference channel FRC4-6, can obtain Q thus
mbe 4, and can Q be calculated
aCKbe 12.
The ACK information of 1 bit through redundancy encoding be Q
mafter the encoding block of bit length, then through repeating to be encoded into Q
aCKthe sequence of bit length
in PUSCH channel interleaving processes, Q
aCKthe ACK/NACK coded sequence of bit length punches to business datum, at fixing resource location, and sequence
directly replace original bits of traffic data, form new business datum; In PUSCH scrambling processes, the operation that mould 2 adds is carried out by a known scrambled bits sequence and bits of traffic data, in addition, reservation position x, y of producing in special processing ack/nack signal cataloged procedure, wherein x is set to bit 1, y and is set to the bit identical with previous adjacent position scrambler bits; In PUSCH modulated process, Q is carried out to scrambled data
mbe the 16QAM modulation of 4, then ACK/NACK coded message is modulated onto place, Fig. 3 grey area constellation point.
Subsequently, when carrying out the blind Detecting of ack/nack signal on PUSCH, detailed process can be:
Base station is carried out FFT conversion to reception data and is obtained frequency-region signal;
The operation of solution resource mapping is carried out to this frequency-region signal;
The reference signal after separating resource mapping operation in the data obtained is utilized to carry out channel estimating, and according to the channel estimation value obtained, equilibrium treatment is done to data, here the Channel Equalization Algorithm selected can be any one algorithm, such as LS (LeastSquare) minimum variation algorithm, MMSE (MinimumMeanSquareError) least-mean-square error algorithm or any other channel estimation method that is known or that propose in the future;
Carry out diversity merging to the data of each reception antenna after frequency domain equalization, when carrying out diversity and merging, selected merge algorithm can be maximum-ratio combing algorithm, equal gain combining algorithm or any other merge algorithm that is known or that propose in the future;
The data obtained after merging diversity carry out IDFT conversion, and carry out Q to the data obtained after IDFT conversion
mit is the soft demodulation of 16QAM of 4, obtain Soft Inform ation, here the soft demodulating algorithm selected can be the soft demodulating algorithm of any one, such as LLR (Log-LikelihoodRatio) log-likelihood ratio algorithm or any other soft demodulating algorithm that is known or that propose in the future;
Solution channel interleaving is carried out to the Soft Inform ation obtained;
From the position of separating the data after channel interleaving, punch to business datum at known ack/nack signal, take out the Q of ACK/NACK
aCKindividual Soft Inform ation undetermined, from the position of punching to business datum scrambler sequence, at known ack/nack signal, takes out the Q of ACK/NACK correspondence position
aCKindividual scrambler, and be converted to bipolarity scrambler, when being converted to bipolarity scrambler, available+1 represents that 1 ,-1 of scrambled bits sequence represents 0 of scrambled bits sequence;
Then according to predetermined filtering judgment condition, above-mentioned Q
aCKindividual scrambler judges the Q taken out
aCKindividual Soft Inform ation undetermined is ack/nack signal or DXT information, if meet predetermined filtering judgment condition, then judges this Q
aCKindividual Soft Inform ation undetermined is ack/nack signal, and carries out decoding to it and obtain 0 or 1, otherwise judges it is DXT information, can not perform any operation.
Here predetermined filtering judgment condition, sets according to the feature in planisphere position after ack/nack signal modulation, in this concrete example of the present invention, is set with following four conditions, specifically comprises:
1) condition1 is more than or equal to n1, and wherein n1 is greater than 0;
Condition1 is the ratio of basis scrambler to income value and ACK/NACK Soft Inform ation root-mean-square value undetermined after ACK/NACK Soft Inform ation undetermined descrambling;
According to Q obtained above
aCKindividual ACK/NACK Soft Inform ation undetermined, calculates its root-mean-square value ave_power, and basis scrambler is to the absolute value ACK_power after ACK/NACK Soft Inform ation descrambling undetermined, obtains condition1=ACK_power/ave_power;
Wherein ave_power and ACK_power computational process can be respectively:
By Q
aCKindividual ACK/NACK Soft Inform ation undetermined converts Q to
mrow Q
n=floor (Q
aCK/ Q
m) matrix that arranges, in this concrete example, be the matrix that 4 row 3 arrange, be matrix
Again symbol is got to ACK/NACK Soft Inform ation matrix undetermined, obtain sign matrix
By Q
aCKindividual bipolarity scrambler also converts Q to
mrow Q
nthe matrix of row
Then have
If condition1 is greater than or equal to n1, then judge to meet this condition, such as: condition1 >=7.
2) condition2 is more than or equal to n2, and wherein n2 is greater than 0;
The computational methods of condition2 be often arrange in statistical matrix S_ACK front 1 ~ 2 row value of symbol be simultaneously 1 or simultaneously for-1 quantity, namely
If condition2 is greater than or equal to n2, then judge to meet this condition, such as: condition2 >=2.
3) condition3 is more than or equal to n3, and wherein n3 is greater than 0;
The computational methods of condition3 are 3rd ~ Q in statistical matrix S_ACK
min row, value of symbol is the quantity of 1, namely
If condition3 is greater than or equal to n3, then judge to meet this condition, such as: condition3 >=4.
4) condition4 is more than or equal to n4, and wherein n4 is greater than 0;
The computational methods of condition4 are the values of gained after statistical matrix S_ACK and scrambling matrix descrambling, namely
If condition4 is greater than or equal to n4, then judge to meet this condition, such as: condition4 >=4.
If above-mentioned four conditions meet simultaneously, then judge Q
aCKindividual Soft Inform ation undetermined is ack/nack signal, and carries out decoding to it and obtain 0 or 1; Otherwise judge it is DXT information, any operation can not be performed.Wherein, said n 1, between n2, n3, n4, there is no incidence relation, can set respectively.
The structural representation of the blind Detecting device embodiment of control information in LTE system of the present invention has been shown in Fig. 4, and it includes:
Resolution unit 401, the Data Analysis process for receiving each reception antenna in base station obtains the data after separating channel interleaving;
The information extraction unit 402 be connected with resolution unit 401, for from the data after described solution channel interleaving, in scrambler sequence, in the position that ack/nack signal punches to business datum, obtain ACK/NACK Soft Inform ation undetermined, scrambler to ack/nack signal scrambling respectively, wherein, here scrambler sequence needs known scrambler sequence according to communication protocol, here ack/nack signal is also according to the known punch position of communication protocol to the position that business datum is punched, can directly use, can without the need to adopting ad hoc fashion to obtain;
The identifying unit 403 be connected with information extraction unit 402, for judging above-mentioned ACK/NACK Soft Inform ation undetermined according to predetermined filtering judgment condition, above-mentioned scrambler whether as ack/nack signal, predetermined filtering judgment condition is here according to the feature setting in planisphere position after ack/nack signal modulation.
Wherein, above-mentioned resolution unit 401 specifically can comprise:
FFT converter unit 4011, the data for receiving each reception antenna in base station are carried out FFT conversion and are obtained frequency-region signal;
Separate resource mapping unit 4012, for carrying out solution resource mapping to described frequency-region signal, obtaining user's frequency-region signal by resource scheduling information, in this user's frequency-region signal, including reference signal and user data;
Channel estimating unit 4013, obtains channel estimation value for carrying out channel estimating according to the reference signal on described user's frequency-region signal to subscriber channel;
Balanced unit 4014, for carrying out equilibrium treatment according to described channel estimation value to user's frequency-region signal;
Diversity merge cells 4015, for carrying out diversity merging to user's frequency-region signal of each antenna of user after equilibrium treatment;
IDFT converter unit 4016, carries out IDFT conversion for the user's frequency-region signal after merging diversity, is transformed to user's time domain data;
Soft demodulating unit 4017, obtains Soft Inform ation for carrying out soft demodulation to user's time domain data, and Soft Inform ation here refers to the logarithm value of the probability institute total that the probability that reception bit is 1 is 0 divided by reception bit;
Separate channel interleaving unit 4018, obtain the data after separating channel interleaving for carrying out separating channel interleaving to Soft Inform ation.
According to the scheme of the invention described above, it is after obtaining the data after separating channel interleaving, from the data after described solution channel interleaving, in scrambler sequence, in the position that ack/nack signal punches to business datum, obtain ACK/NACK Soft Inform ation undetermined respectively, to the scrambler of ack/nack signal scrambling, and according to predetermined filtering judgment condition, the scrambler of gained judges ACK/NACK Soft Inform ation undetermined whether as ack/nack signal, and predetermined filtering judgment condition sets according to the feature in planisphere position after ack/nack signal modulation, take full advantage of feature on planisphere position after ack/nack signal modulation, thus effectively can reduce false alarm probability, meet the performance requirement of false alarm probability and false dismissal probability simultaneously.
Wherein, when feature in planisphere position after modulating according to ack/nack signal sets predetermined filtering judgment condition, this predetermined filtering judgment condition can be any one or the combination in any that comprise in following four conditions, under preferable case, can be meet following four conditions simultaneously, can realize judging accurately:
Be greater than or equal to the first set point according to scrambler to the ratio of the root-mean-square value of income value and ACK/NACK Soft Inform ation undetermined after ACK/NACK Soft Inform ation undetermined descrambling, the first set point is here greater than 0;
After ACK/NACK Soft Inform ation undetermined is transformed to the sub-encoding block of multiple ACK/NACK, the number sum that in the sub-encoding block of each ACK/NACK, front two Soft Inform ation symbol is identical is greater than or equal to the second set point, and the second set point is here greater than 0;
After ACK/NACK Soft Inform ation undetermined is transformed to the sub-encoding block of multiple ACK/NACK, 3rd ~ Q in the sub-encoding block of each ACK/NACK
min position, symbol is that positive number sum is greater than or equal to the 3rd set point, Q here
mfor the order of modulation on PUSCH, the 3rd set point is here greater than 0;
According to scrambler to the symbol of income value after ACK/NACK Soft Inform ation descrambling undetermined and be greater than or equal to the 4th set point, the 4th set point is greater than 0.
Identical with the blind checking method of the invention described above of concrete analysis mode when the blind Detecting device of control information in LTE system of the present invention carries out blind Detecting, information extraction mode, decision procedure, does not repeat them here.
In existing LTE system, there are two kinds of communication patterns, fdd mode and tdd mode, the blind checking method of the control information of the invention described above scheme, the blind Detecting device of control information, all can apply in these two kinds of patterns (fdd mode, tdd mode), not repeat them here.
Above-described embodiment of the present invention, is only the detailed description to better embodiment of the present invention, does not form limiting the scope of the present invention.Any amendment done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within claims of the present invention.
Claims (6)
1. a blind checking method for control information in LTE system, is characterized in that, comprises step:
Data after separating channel interleaving are obtained to the Data Analysis process that each reception antenna in base station receives;
From the data after described solution channel interleaving, in scrambler sequence, in the position that ack/nack signal punches to business datum, obtain ACK/NACK Soft Inform ation undetermined, scrambler to ack/nack signal scrambling respectively;
Judge described ACK/NACK Soft Inform ation undetermined whether as ack/nack signal according to predetermined filtering judgment condition, described scrambler, described predetermined filtering judgment condition is according to the feature setting in planisphere position after ack/nack signal modulation;
Described predetermined filtering judgment condition comprises any one or combination in any in following four conditions:
Be greater than or equal to the first set point according to scrambler to the ratio of the root-mean-square value of income value and ACK/NACK Soft Inform ation undetermined after ACK/NACK Soft Inform ation undetermined descrambling, described first set point is greater than 0;
After ACK/NACK Soft Inform ation undetermined is transformed to the sub-encoding block of multiple ACK/NACK, the number sum that in the sub-encoding block of each ACK/NACK, front two Soft Inform ation symbol is identical is greater than or equal to the second set point, and described second set point is greater than 0;
After ACK/NACK Soft Inform ation undetermined is transformed to the sub-encoding block of multiple ACK/NACK, 3rd ~ Q in the sub-encoding block of each ACK/NACK
min position, symbol is that positive number sum is greater than or equal to the 3rd set point, described Q
mfor the order of modulation on PUSCH, described 3rd set point is greater than 0;
According to scrambler to the symbol of income value after ACK/NACK Soft Inform ation descrambling undetermined and be greater than or equal to the 4th set point, described 4th set point is greater than 0;
If meet described predetermined filtering judgment condition, then judge that described ACK/NACK Soft Inform ation undetermined is ack/nack signal.
2. the blind checking method of control information in LTE system according to claim 1, is characterized in that, described dissection process comprises:
The data received each reception antenna in base station are carried out FFT conversion and are obtained frequency-region signal;
Solution resource mapping is carried out to described frequency-region signal, obtains user's frequency-region signal by resource scheduling information;
According to the reference signal on described user's frequency-region signal, channel estimating is carried out to subscriber channel, obtain channel estimation value;
According to described channel estimation value, equilibrium treatment is carried out to user's frequency-region signal;
Diversity merging is carried out to the frequency-region signal of each antenna of user after equilibrium treatment;
IDFT is carried out to the user's frequency-region signal after diversity merging and is transformed to user's time domain data;
Carry out soft demodulation to user's time domain data and obtain Soft Inform ation, carry out separating channel interleaving to Soft Inform ation and obtain the data after separating channel interleaving, described Soft Inform ation refers to the logarithm value of the probability institute total that the probability that reception bit is 1 is 0 divided by reception bit.
3. the blind checking method of control information in LTE system according to claim 2, is characterized in that:
LS algorithm or MMSE algorithm is adopted to carry out equilibrium treatment;
And/or
Maximum-ratio combing algorithm or gain combining algorithm is adopted to carry out diversity merging;
And/or
LLR algorithm is adopted to carry out soft demodulation.
4. a blind Detecting device for control information in LTE system, is characterized in that, comprising:
Resolution unit, the Data Analysis process for receiving each reception antenna in base station obtains the data after separating channel interleaving;
The information extraction unit be connected with resolution unit, for from the data after described solution channel interleaving, in scrambler sequence, in the position that ack/nack signal punches to business datum, obtain ACK/NACK Soft Inform ation undetermined, scrambler to ack/nack signal scrambling respectively;
The identifying unit be connected with information extraction unit, for judging described ACK/NACK Soft Inform ation undetermined according to predetermined filtering judgment condition, described scrambler whether as ack/nack signal, described predetermined filtering judgment condition is according to the feature setting in planisphere position after ack/nack signal modulation;
Described predetermined filtering judgment condition comprises any one or combination in any in following four conditions:
Be greater than or equal to the first set point according to scrambler to the ratio of the root-mean-square value of income value and ACK/NACK Soft Inform ation undetermined after ACK/NACK Soft Inform ation undetermined descrambling, described first set point is greater than 0;
After ACK/NACK Soft Inform ation undetermined is transformed to the sub-encoding block of multiple ACK/NACK, the number sum that in the sub-encoding block of each ACK/NACK, front two Soft Inform ation symbol is identical is greater than or equal to the second set point, and described second set point is greater than 0;
After ACK/NACK Soft Inform ation undetermined is transformed to the sub-encoding block of multiple ACK/NACK, 3rd ~ Q in the sub-encoding block of each ACK/NACK
min position, symbol is that positive number sum is greater than or equal to the 3rd set point, described Q
mfor the order of modulation on PUSCH, described 3rd set point is greater than 0;
According to scrambler to the symbol of income value after ACK/NACK Soft Inform ation descrambling undetermined and be greater than or equal to the 4th set point, described 4th set point is greater than 0;
Institute's identifying unit, when judging to meet described predetermined filtering judgment condition, judges that described ACK/NACK Soft Inform ation undetermined is ack/nack signal.
5. the blind Detecting device of control information in LTE system according to claim 4, is characterized in that, described resolution unit comprises:
FFT converter unit, the data for receiving each reception antenna in base station are carried out FFT conversion and are obtained frequency-region signal;
Separating resource mapping unit, for carrying out solution resource mapping to described frequency-region signal, obtaining user's frequency-region signal by resource scheduling information;
Channel estimating unit, obtains channel estimation value for carrying out channel estimating according to the reference signal on described user's frequency-region signal to subscriber channel;
Balanced unit, for carrying out equilibrium treatment according to described channel estimation value to user's frequency-region signal;
Diversity merge cells, for carrying out diversity merging to user's frequency-region signal of each antenna of user after equilibrium treatment;
IDFT converter unit, is transformed to user's time domain data for carrying out IDFT to the user's frequency-region signal after diversity merging;
Soft demodulating unit, obtains Soft Inform ation for carrying out soft demodulation to user's time domain data, and described Soft Inform ation refers to the logarithm value of the probability institute total that the probability that reception bit is 1 is 0 divided by reception bit;
Separate channel interleaving unit, obtain the data after separating channel interleaving for carrying out separating channel interleaving to Soft Inform ation.
6. the blind Detecting device of control information in LTE system according to claim 5, is characterized in that:
Balanced unit adopts LS algorithm or MMSE algorithm to carry out equilibrium treatment;
And/or
Diversity merge cells adopts maximum-ratio combing algorithm or gain combining algorithm to carry out diversity merging;
And/or
Soft demodulating unit adopts LLR algorithm to carry out soft demodulation.
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| US9369241B2 (en) | 2014-02-18 | 2016-06-14 | Huawei Technologies Co., Ltd. | HARQ frame data structure and method of transmitting and receiving with HARQ in systems using blind detection |
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