CN106888069B - A kind of PBCH channel blind detection method - Google Patents
A kind of PBCH channel blind detection method Download PDFInfo
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- CN106888069B CN106888069B CN201510938151.6A CN201510938151A CN106888069B CN 106888069 B CN106888069 B CN 106888069B CN 201510938151 A CN201510938151 A CN 201510938151A CN 106888069 B CN106888069 B CN 106888069B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0036—Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the receiver
- H04L1/0038—Blind format detection
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0045—Arrangements at the receiver end
- H04L1/0052—Realisations of complexity reduction techniques, e.g. pipelining or use of look-up tables
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Abstract
The present invention relates to a kind of PBCH channel blind detection methods, method includes the following steps: carrying out signal detection to the first data according to single port algorithm, obtain the second data；First time verification is carried out to the second data；If verification does not pass through for the first time, signal detection is carried out to the first data according to dual-port algorithm, obtains third data；Second is carried out to third data to verify；If second of verification does not pass through, four port channels are recombinated；It is multiplexed dual-port algorithm and signal detection is carried out to the first data, obtain the 4th data；Third time verification is carried out to the 4th data；If third time verification passes through, blind examination success.The present invention simplifies PBCH channel blind detection algorithm, is multiplexed existing algorithm, reduces the human cost of exploitation and verifying.
Description
Technical field
The present invention relates to long term evolution project LTE (Long Term Evolution) mobile communication technology fields, especially relate to
A kind of and PBCH channel blind detection method.
Background technique
In long term evolution project LTE (Long Term Evolution) system, Physical Broadcast Channel PBCH (Physical
Broadcast channel) use space diversity technology, reference can be made to PBCH channel architecture schematic diagram shown in FIG. 1.Space point
Collection MIMO (Multiple-Input Multiple-Output) is a kind of multichannel input Multiple-output.As shown in Figure 1,
MIMO technology refers to uses multiple transmitting antennas and receiving antenna in transmitting terminal and receiving end respectively, and signal is made to pass through transmitting terminal and connect
The mutiple antennas of receiving end is transmitted and is received, so as to improve communication quality.It can make full use of space resources, pass through mutiple antennas reality
Existing multiple-input multiple-output can increase exponentially system channel capacity in the case where not increasing frequency spectrum resource and antenna transmission power,
The core technology for showing apparent advantage, being considered as next generation mobile communication.
The coding and decoding process of PBCH channel is as shown in Figure 2, wherein coding of the signal at base station eNodeB end is transmitted across
Journey specifically includes that CRC processing, channel coding, rate-matched, scrambling, quadrature phase shift keying QPSK (Quadrature Phase
Shift Keyin) modulation, layer mapping, precoding, resource unit RE (Resource Element) mapping, fast Fourier are inverse
Convert (Inverse fast Fourier transform, IFFT) (adding cyclic prefix CP), Digital Up Convert, digital-to-analogue conversion
DAC and signal are sent；The reception signal and decoding process at the end UE specifically include that signal reception, Digital Down Convert, analog-to-digital conversion
ADC, time & Frequency Synchronization, Fast Fourier Transform (FFT) FFT (removing CP), RE inverse mapping, channel estimation, signal detection, layer is inverse to be reflected
It penetrates, QPSK demodulation, descrambling, solution rate-matched, coding and CRC check.
Physical Broadcast Channel PBCH includes sending and receiving for signal, signal receiving end user equipment (UE) (User
Equipment) blind examination mainly solves the problems, such as three: 1, antenna configuration is unknown.The different then receiving end MIMO of transmission antenna configuration are examined
The operation of survey is different, and common method is the case where Polling transmission antenna is 1,2 or 4.2, the frequency range of signal is unknown, therefore solves
The scrambling code disturbed is which section is also unknown.Common method is in turn to every section of progress cyclic redundancy check (Cyclic
Redundancy Check) CRC, until CRC check is correct.There are three types of antenna port combination (1/2/4) and four kinds by PBCH
Different scrambling codes (phase) combination may combine so being blind examination PBCH and being up to 12 kinds.3, Master Information Block MIB (Master is solved
Information Block) in information.
When to PBCH channel blind detection, different port, i.e., different transmission antenna configured numbers correspond to blind examination needs and use
Single port, dual-port or four port algorithms, detect the information of antenna configuration number, scrambling code and Master Information Block.PBCH Blind channel
Algorithms of different is corresponding with different channel matrixes when inspection.
Prior art PBCH channel detection method is primarily present following defect:
1, the algorithm complexity of the prior art is too high, and when channel matrix increases, multiplying amount is with the order of magnitude of power side
Increase.
2, the prior art is respectively processed the case where every kind of port, is not available existing algorithm and is multiplexed, and increases
The human cost of exploitation and verifying is added.
Summary of the invention
The purpose of the present invention is to solve in place of above-mentioned the deficiencies in the prior art, a kind of PBCH Blind channel procuratorial organ is provided
Method.It can simplify PBCH channel blind detection algorithm, be multiplexed existing algorithm, reduce the human cost of exploitation and verifying.
To achieve the above object, the present invention provides a kind of PBCH channel blind detection methods, method includes the following steps:
Signal detection is carried out to the first data according to single port algorithm, obtains the second data, and the is carried out to the second data
Primary verification；If verification does not pass through for the first time, signal detection is carried out to the first data according to dual-port algorithm, obtains third number
According to, and second is carried out to third data and is verified；If second of verification does not pass through, channel is recombinated；It is multiplexed dual-port
Algorithm carries out signal detection to the first data, obtains the 4th data；And third time verification is carried out to the 4th data；If third time
Verification passes through, then blind examination success.
Preferably, signal detection is carried out to the first data according to dual-port algorithm corresponding first two-port channel matrix,
After simplifying treatment process, the second two-port channel matrix is obtained, letter is carried out to the first data according to the second two-port channel matrix
Number detection calculates, and obtains third data, and carry out second to third data and verify.
Preferably, further comprising the steps of before carrying out signal detection to the first data according to single port algorithm: to receive
The data of transmission, and data are successively carried out Digital Down Convert, digital-to-analogue conversion, time and Frequency Synchronization, go cyclic prefix,
Fast Fourier Transform (FFT) and resource unit inverse mapping processing, obtain the first data；Channel is estimated, channel parameter is obtained
Estimated result.
Preferably, if second of verification does not pass through, channel is recombinated, specifically includes the following steps: being calculated according to four ports
Corresponding one or the four port channel matrix reduction of four port algorithms is the two or four port channel matrix by method；By the two or four port
Channel matrix splits to obtain the three or four port channel matrix and the four or four port channel matrix；According to the three or four port channel matrix
Queueing discipline corresponding with channel parameter in the second two-port channel matrix with the four or four port channel matrix, to channel into
Row recombination.
Preferably, verification for the first time includes: to carry out first to the second data according to single port cyclic redundancy check (CRC) algorithm
Secondary CRC check.
Preferably, second of verification includes: to carry out second of CRC check to third data according to dual-port CRC algorithm.
Preferably, third time verification includes: to carry out third time CRC check to the 4th data according to four port CRC algorithms.
Preferably, if verification passes through for the first time, blind examination success, the second data are the number in the Master Information Block solved
According to emission port 1.
Preferably, if second of verification passes through, blind examination success, third data are the number in the Master Information Block solved
According to emission port 2.
Preferably, if third time verification passes through, blind examination success, the 4th data are the number in the Master Information Block solved
According to emission port 4；If the third time verification does not pass through, blind examination failure receives the first data again, carries out again
Blind examination.
The present invention carries out simplifying processing for algorithm, reduces the size of matrix, to reduce computational complexity.Together
When, the present invention carries out the processing of simple possible to the channel matrix of four ports, has successfully been multiplexed the algorithm of dual-port, has reduced
The programming of developer and the workload of verifying.
Detailed description of the invention
In order to become apparent from the technical solution for illustrating the embodiment of the present invention, embodiment will be described below in it is required use it is attached
Figure is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this field
For those of ordinary skill, without creative efforts, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is prior art PBCH channel architecture schematic diagram；
Fig. 2 is the coding and decoding process schematic of prior art PBCH channel；
Fig. 3 is prior art PBCH channel blind detection method flow schematic diagram；
Fig. 4 is a kind of PBCH channel blind detection method flow schematic diagram provided in an embodiment of the present invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
In order to facilitate understanding of embodiments of the present invention, it is further explained below in conjunction with attached drawing with specific embodiment
It is bright.
For a clearer understanding of the present invention with the difference of the prior art, described in the prior art below by Fig. 3
PBCH channel blind detection method.
Fig. 3 is the flow diagram of prior art PBCH channel blind detection method.As shown in figure 3, existing PBCH channel blind detection
Method includes step 300-308:
In step 300, user equipment (UE) receives rf data, and successively carries out Digital Down Convert, analog-to-digital conversion to data
Cyclic prefix CP, Fast Fourier Transform (FFT) FFT and resource unit inverse mapping processing are gone in ADC, the processing of time & Frequency Synchronization, are obtained
Data Rx.
The estimated result of channel parameter is obtained to channel estimation in step 301.
Channel parameter estimation is carried out to channel situation, obtains channel matrix within the scope of certain physical resource.
It should be noted that algorithm (single port algorithm, dual-port algorithm or four ports specifically used according to signal detection
Algorithm), there are corresponding single port channel matrix, two-port channel matrix or four port channel matrixes.
In step 302, according to single port algorithm, to step 300, treated that data carry out signal detection.
First, in accordance with the process of single port algorithm, signal detection is carried out to the data of PBCH channel.
It should be noted that after wireless channel, being sent to receiving end in the data of Base Transmitter.Therefore, receiving end
Data include two parts information: the data and channel parameter information of transmitting terminal.Signal detection is carried out to the data of PBCH channel,
It is the data X that transmitting terminal is solved by channel matrix and data Rx.
The received rf data of single port algorithm process belongs to the prior art to its process for carrying out signal detection, herein
It repeats no more, in order to avoid fuzzy subject of the present invention.
In step 303, to the data that step 302 obtains carry out layer inverse mapping, QPSK demodulation, descrambling, solution rate-matched and
Then decoding process is verified according to the CRC check method of single port, if single port CRC check does not pass through, enter step
Rapid 304, if single port CRC check passes through, go to step 308.
In step 304, according to dual-port algorithm, to step 300, treated that data carry out signal detection.
Layer mapping, precoding of the dual port data Jing Guo base station eNodeB are as follows:
Layer mapping:
x(0)(i)=d(0)(2i)
x(1)(i)=d(0)(2i+1)
Precoding:
Wherein, d(0)(2i) indicates the modulated the 2i data of QPSK, d(0)(2i+1) indicates the modulated 2i+ of QPSK
1 data, x(0)(i) i-th of data of expression layer 0, x(1)(i) i-th of data of expression layer 1, y(0)(2i) indicates emission port
(port) 0 the 2i data, y(0)The 2i+1 data of (2i+1) expression emission port 0.
It should be noted that d(0)(2i)、d(0)(2i+1) be base station by CRC processing, channel coding, rate-matched,
Scrambling and the modulated data of QPSK；x(0)(i)、x(1)(i) it is data after layer maps；y(0)(2i)、y(0)(2i+1) is
Data after precoding.
Signal detection processing is carried out to step 300 treated data according to dual-port algorithm, specifically handles calculating process
It is as follows: to set Rx as step 300 treated data, H20For the corresponding two-port channel matrix of dual-port algorithm, according to Rx and double
Port channel matrix H20Signal detection is carried out, the data in base station after QPSK modulation, layer mapping, before precoding are obtained
X is carried out by following formula:
Wherein, two-port channel matrix H20Are as follows:
It should be noted that Rx is receiving end by step 300 treated data, r0(2*i) indicates step 300 processing
The 2i data that receiving port 0 receives afterwards,Subscript Rxid represent receiving port serial number, subscript Txid represents transmitting
Port serial number, i represent the relative numbering of data.ForReduced form.
It is as follows to be write above-mentioned signal detection process as final expression formula:
Again variable and composition matrix are extracted, due to 4 unknown quantity x in above-mentioned expression formula0With conj (x0)、x1With
conj(x1) it is respectively present conjugate relation, unknown quantity can be reduced to 2 by following skill:
According to following matrix operation derivation process, so that it may be believed by the transmitting that the reception signal R at the end UE calculates base station
Number X:
R1=H201×X1T(H201 *)R1=T (H201 *)H1×X1
inv[T(H201 *)×H201]×T(H201 *)×R1=inv [T (H201 *)×H201]×T(H201 *)×H201×X1=X1
It should be noted that
Two-port channel matrix H can be passed through20Obtain H201, pass through the receiving end UE and by step 300 treated data
Rx obtains Rx1, X is then obtained by signal detection1, and then obtain the precoding in base station after QPSK modulation, layer mapping
Data before
It should be noted that the first two-port channel matrix is H20, the second two-port channel matrix is H201。
In step 305, to the data that step 304 obtains carry out layer inverse mapping, QPSK demodulation, descrambling, solution rate-matched and
Then decoding process is verified according to the CRC check method of dual-port, if dual-port CRC check does not pass through, enter step
Rapid 306, if dual-port CRC check passes through, go to step 308.
In step 306, according to four port algorithms, to step 300, treated that data carry out signal detection.
Layer mapping, precoding of four port datas Jing Guo base station eNodeB are as follows:
Layer mapping
x(0)(i)=d(0)(4i)
x(1)(i)=d(0)(4i+1)
x(2)(i)=d(0)(4i+2)
x(3)(i)=d(0)(4i+3)
Precoding
Signal detection carried out to step 300 treated data according to four port algorithms, specific to handle calculating process as follows:
If Rx is step 300 treated data, H40For corresponding one or the four port channel matrix of four port algorithms, according to Rx and first
Four port channel matrix Hs40Signal detection is carried out, the number in base station after QPSK modulation, layer mapping, before precoding is obtained
According to X, data X is obtained by following formula:
Wherein, the one or four port channel matrix H40Are as follows:
With reference to step 304, according to the conjugate relation of known variables, variable and composition matrix are extracted again, unknown quantity is subtracted
Less it is 4:
According to following matrix operation derivation process, so that it may be believed by the transmitting that the reception signal Rx at the end UE calculates base station
Number X:
R2=H401×X2T(H401 *)R2=T (H401 *)H401×X2
inv[T(H401 *)×H2]×T(H401 *)×R2=inv [T (H401 *)×H2]×T(H401 *)×H401×X2=X2
It should be noted that here The one or four port channel matrix H can be passed through40It obtains
Two or four port channel matrix H401, pass through the receiving end UE and treated that data Rx obtains Rx by step 3002, then pass through
Signal detection obtains X2, and then obtain the data in base station after QPSK modulation, layer mapping, before precoding
In step 307, to the data that step 306 obtains carry out layer inverse mapping, QPSK demodulation, descrambling, solution rate-matched and
Then decoding process is verified according to the CRC check method of four ports, if four port CRC checks do not pass through, blind examination is lost
It loses, gos to step 300, receive data again, carry out blind examination again；If four port CRC checks pass through, enter step
308。
In step 308, this blind examination success.Blind examination obtains the information X and emission port configuration quantity of Master Information Block MIB:
If going to step 308 from step 303, blind examination success, then emission port is 1；
If going to step 308 from step 305, blind examination success, then emission port is 2；
If entering step 308 from step 307, blind examination success, then emission port is 4.
It should be noted that being descrambled to data, solving the processes such as rate-matched and decoding and CRC check, belong to existing
There is technology segment, details are not described herein, in order to avoid fuzzy subject of the present invention.
From existing PBCH channel blind detection method and calculating process, it is known that, algorithm complexity is high, when channel matrix increases
When, such as four port channel matrix Hs40, multiplying amount is with the order of magnitude increase of power side.Meanwhile the prior art holds every kind
The case where mouth, is respectively processed, and can not be multiplexed to existing algorithm, increase the human cost of exploitation and verifying.
Fig. 4 is a kind of flow diagram of PBCH channel blind detection method provided in an embodiment of the present invention.As shown in figure 4, should
Method includes step 400-409:
Signal receiving end receives rf data, and handles rf data, obtains the first data；According to single-ended mental arithmetic
Method carries out signal detection calculating to the first data, obtains the second data, and carry out first time verification to the second data.It can be subdivided into
Following steps 400-403:
In step 400, data are received, the first data are obtained after processing.
User equipment (UE) signal receiving end receives rf data, and successively carries out Digital Down Convert, analog-to-digital conversion to data
Cyclic prefix CP, Fast Fourier Transform (FFT) FFT and resource unit inverse mapping processing are gone in ADC, the processing of time & Frequency Synchronization, are obtained
First data Rx.
The estimated result of channel parameter is obtained to channel estimation in step 401.
In step 402, signal detection is carried out to the first data according to single port algorithm, obtains the second data.
In step 403, the second data are carried out at capable layer inverse mapping, QPSK demodulation, descrambling, solution rate-matched and decoding
Then reason carries out first time verification, is verified according to the CRC check method of single port.If single port CRC check is obstructed
It crosses, then enters step 404, if single port CRC check passes through, go to step 409.First time school is carried out to the second data
It tests；If verification passes through for the first time, blind examination success.
If verification does not pass through for the first time, signal detection is carried out to the first data according to dual-port algorithm, obtains third number
According to, and second is carried out to third data and is verified.Following steps 404-405 can be subdivided into:
In step 404, signal detection is carried out to the first data according to dual-port algorithm, obtains third data.
Signal detection processing is carried out to the first data according to dual-port algorithm corresponding first two-port channel matrix, is simplified
After calculating process, corresponding second two-port channel matrix is obtained, the first data are carried out according to the second two-port channel matrix
Signal detection calculates, and obtains third data.
Referring to the step 304 of existing PBCH channel blind detection method, signal inspection is carried out to the first data according to dual-port algorithm
It surveys, specific processing calculating process is as follows: setting Rx as the first data, H20For the corresponding two-port channel matrix of dual-port algorithm, root
According to Rx and two-port channel matrix H20The data X in base station after QPSK modulation, layer mapping, before precoding is obtained, is led to
Following formula is crossed to be calculated:
Wherein, H20For the first two-port channel matrix:
Again variable and composition matrix are extracted, due to 4 unknown quantity x in above-mentioned expression formula0With conj (x0)、x1With
conj(x1) it is respectively present conjugate relation, unknown quantity can be reduced to 2 by following skill:
According to following matrix operation derivation process, so that it may be believed by the transmitting that the reception signal R at the end UE calculates base station
Number X:
R1=H201×X1T(H201 *)R1=T (H201 *)H201×X1
inv[T(H201 *)×H201]×T(H201 *)×R1=inv [T (H201 *)×H201]×T(H201 *)×H201×X1=X1
It should be noted thatSecond two-port channel matrix H201Are as follows:X can be according to X1It obtains.
In third data of the base station after QPSK modulation, layer mapping, before precoding
In step 405, layer inverse mapping, QPSK demodulation, descrambling, solution rate-matched and decoding process are carried out to third data,
Then it carries out verifying for second, be verified according to the CRC check method of dual-port, if dual-port CRC check does not pass through,
406 are entered step, if dual-port CRC check passes through, gos to step 409.Second is carried out to the 4th data to verify；Such as
Second of verification of fruit passes through, then blind examination success.
It should be noted that step 400-405 can refer to the detailed process of prior art corresponding steps 300-305, herein
It does not repeat again.
If second of verification does not pass through, channel is recombinated；It is multiplexed dual-port algorithm and signal is carried out to the first data
Detection obtains the 4th data, and carries out third time verification to the 4th data；If third time verification passes through, blind examination success.
In step 406, if second of verification does not pass through, channel is recombinated.
If second of verification does not pass through, four port channels are recombinated, specifically includes the following steps:
It is the two or four port letter by corresponding one or the four port channel matrix reduction of four port algorithms according to four port algorithms
Road matrix；
The three or four port channel matrix and the four or four port channel matrix are obtained according to the two or four port channel matrix-split；
According to channel in the three or four port channel matrix and the four or four port channel matrix and the second two-port channel matrix
The corresponding queueing discipline of parameter recombinates four port channels.
Signal is carried out to the first data according to four port algorithms according to step 306 in the existing PBCH channel blind detection method of Fig. 3
The final derivation formula of detection processing:
H401For the two or four port channel matrix.
The above-mentioned derivation formula of abbreviation, by Rx2It is divided into Rx21And Rx22, corresponding matrix and variable are extracted, can be reduced to as follows
Two equations:
After abbreviation is split, the two or four port channel matrix H401It can be divided into: the three or four port channel matrix H4011With the four or four
Port channel matrix H4012, in which:
Corresponding variable X2It can be divided into: the first variable X21With the second variable X22, in which:
Referring in existing PBCH channel blind detection method, step 304 carries out signal inspection to the first data according to dual-port algorithm
The final derivation formula surveyed:
Wherein, the second two-port channel matrix H201Are as follows:
As long as observation is it is found that the channel estimation results of four ports are recombinated, to the three or four port channel matrix and the
Four or four port channel matrixes carry out weight according to the corresponding queueing discipline with channel parameter in the second two-port channel matrix respectively
Group can be multiplexed the MIMO algorithm of dual-port.Channel parameter is put in order recombination, i.e., according to the three or four port channel matrix
H4011With the four or four port channel matrix H4012With the second two-port channel matrix H201One-to-one channel parameter arrange rule
Then recombinate.
The channel order of dual-port are as follows:
Corresponding simplified two-port channel matrix are as follows:
The channel original order of four ports are as follows:
Four port channel matrixes after corresponding simplified fractionation are as follows:
According to the corresponding relationship for simplifying four port channel matrixes and simplified two-port channel matrix after splitting: both-end
Message road matrix (1-1), (1-2) respectively correspond four port channel matrix (2-1), (2-2), according to corresponding matrix
In channel parameter corresponding position, to four port channels arrange recombinate.
Four port channels sequence after recombination is as follows:
According to simplified four port channels matrix, four port channels after recombination have some channel parameters to lose.
In step 407, it is multiplexed dual-port algorithm and signal detection is carried out to the first data, obtain the 4th data.
After recombinating four port channels, multiplexing dual-port algorithm carries out signal detection, on the basis of step 406, direct basis
Simplified dual-port algorithm and the three or four port channel matrix H4011With the four or four port channel matrix H4012It finds out corresponding
The first variable X21With the second variable X22, according to the first variable X21With the second variable X22, obtain variable X2, and then obtain the 4th
Data X.I.e. multiplexing dual-port algorithm carries out signal detection to the first data, obtains the 4th data.
In step 408, to the 4th data Layer inverse mapping, QPSK demodulation, descrambling, solution rate-matched and decoding process, then
Third time verification is carried out, is verified according to the CRC check method of four ports, if four port CRC checks pass through, enters step
Rapid 409.
If four port CRC checks do not pass through, this blind examination failure comes back to step 400, carries out blind examination again.
In step 409, this blind examination success terminates process.The letter of Master Information Block MIB can be obtained according to blind examination successful result
It ceases X and emission port configures quantity:
If going to step 409 from step 403, blind examination success, then emission port is 1；
If going to step 409 from step 405, blind examination success, then emission port is 2；
If entering step 409 from step 408, blind examination success, then emission port is 4.
It should be noted that being descrambled to data, solving the processes such as rate-matched and decoding and CRC check, belong to existing
There is technology segment, details are not described herein, in order to avoid fuzzy subject of the present invention.
The embodiment of the present invention carries out simplifying place for the algorithm that blind examination process is used by a kind of PBCH channel blind detection method
Reason, reduces the size of matrix, to reduce computational complexity.Meanwhile the present invention carries out letter to the channel matrix of four ports
Single feasible processing, has successfully been multiplexed the algorithm of dual-port, has reduced the programming of developer and the workload of verifying.
Above specific embodiment has carried out further in detail the purpose of the present invention, technical scheme and beneficial effects
Illustrate, it should be understood that the above is only a specific embodiment of the invention, the protection model that is not intended to limit the present invention
It encloses, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should be included in the present invention
Protection scope within.
Claims (8)
1. a kind of PBCH channel blind detection method, which is characterized in that the described method comprises the following steps:
Signal detection is carried out to the first data according to single port algorithm, obtains the second data, and the is carried out to second data
Primary verification；
If the first time verification does not pass through, according to the corresponding first two-port channel matrix of dual-port algorithm to described first
Data carry out signal detection, after simplifying treatment process, the second two-port channel matrix are obtained, according to second two-port channel
Matrix carries out signal detection calculating to the first data, obtains third data, and carry out second to the third data and verify；
If second of verification does not pass through, according to four port algorithms, by corresponding one or four port channel of four port algorithms
Matrix reduction is the two or four port channel matrix；Two or the four port channel matrix-split is obtained into the three or four port channel square
Battle array and the four or four port channel matrix；According to the three or the four port channel matrix and the four or four port channel matrix and described the
The corresponding queueing discipline of channel parameter, recombinates channel in two two-port channel matrixes；Dual-port algorithm is multiplexed to described
First data carry out signal detection, obtain the 4th data；And third time verification is carried out to the 4th data；
If the third time verification passes through, blind examination success.
2. the method according to claim 1, wherein carrying out signal inspection to the first data according to single port algorithm
It is further comprising the steps of before survey:
The data of transmission are received, and it is same that the data are successively carried out with Digital Down Convert, digital-to-analogue conversion, time and frequency
It walks, go cyclic prefix, Fast Fourier Transform (FFT) and resource unit inverse mapping processing, obtain the first data；
Channel is estimated, the estimated result of channel parameter is obtained.
3. the method according to claim 1, wherein first time verification includes: superfluous according to single port circulation
Remaining check (CRC) algorithm carries out first time CRC check to second data.
4. the method according to claim 1, wherein second of verification includes: according to dual-port CRC algorithm
Second of CRC check is carried out to the third data.
5. the method according to claim 1, wherein third time verification includes: according to four port CRC algorithms
Third time CRC check is carried out to the 4th data.
6. according to the method described in claim 3, it is characterized in that, blind examination is successful, institute if first time verification passes through
Stating the second data is the data in the Master Information Block solved, emission port 1.
7. according to the method described in claim 4, it is characterized in that, blind examination is successful, institute if second of verification passes through
Stating third data is the data in the Master Information Block solved, emission port 2.
8. according to the method described in claim 5, it is characterized in that, blind examination is successful, institute if third time verification passes through
Stating the 4th data is the data in the Master Information Block solved, emission port 4；
If the third time verification does not pass through, blind examination failure receives the first data again, carries out blind examination again.
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| CN103067144A (en) * | 2012-12-25 | 2013-04-24 | 电信科学技术研究院 | Iteration receiving method and equipment |
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