CN106559805A - The method and apparatus for lifting physical channel PBCH demodulation performances - Google Patents
The method and apparatus for lifting physical channel PBCH demodulation performances Download PDFInfo
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Abstract
The present invention relates to a kind of method and apparatus for lifting physical channel PBCH demodulation performances.The method is comprised the following steps：A. the frequency range according to belonging to currently received frequency, determines one or more bandwidth that the cell of the frequency range is supported；B. according to this, one or more receive the data of PBCH with the maximum bandwidth of alleviating distention in middle-JIAO；C. calculate quality indication signal of the receiving data under one or more bandwidth；And d. carries out channel estimation and PBCH demodulation according to quality indication signal highest bandwidth, and Master Information Block MIB is decoded.
Description
Technical field
The present invention relates to Long Term Evolution (Long-Term Evolution, LTE) system, more particularly, to lifting
The method and apparatus of the physical channel PBCH demodulation performances of LTE system.
Background technology
LTE system is the system of a bandwidth varying, and from 1.4M to 20M, one has 6 to its bandwidth range
Plant configuration：1.4M/3M/5M/10M/15M/20M.The actual downstream bandwidth of each cell this letter that is how many
Breath is included in Master Information Block (Master Information Block, MIB), and before MIB successfully decodeds,
This information just has no way of knowing.
In LTE system, the channel for carrying mib information includes logic channel BCCH (Broadcast
Control CHannel), transmission channel BCH (Broadcast CHannel)/DL-SCH (Downlink Shared
) and physical channel (Physical Broadcast Channel, PBCH) CHannel.Logic channel BCCH is two
Carry on individual transmission channel BCH and DL-SCH.What is carried on transmission channel BCH is mib information,
What is carried on transmission channel DL-SCH is system information block (System Information Block, SIB) letter
Breath.The most basic information of cell is contained in MIB, such as descending system bandwidth, System Frame Number, PHICH match somebody with somebody
Put (including PHICH-Duration and PHICH-Resource).After obtaining these information, could be right
DL-SCH is received the decode, and completes the reading of follow-up SIB.
The mapping relations of logic channel BCCH and transmission channel BCH/DL-SCH are as shown in Figure 1.Transmission
Channel BCH and physical channel PBCH are the mappings of the relation for mapping one by one, transmission channel and physical channel
Relation is as shown in Figure 2.
Physical channel PBCH has its specific physical layer position characteristic --- and frequency domain position is specific and time-domain position
It is specific.Frequency domain position is specific to be meaned no matter the bandwidth of cell is much, always physical channel PBCH is little
On 72 subcarriers of area's bandwidth center, as shown in Figure 3.Time-domain position is specific to mean each radio frames
Time slot 1 (#slot1) on, there is physical channel PBCH in front 4 symbols, as shown in Figure 4.According to this
Two features, ordinary circumstance receive physical channel PBCH and just can connect according to center frequency point 1.4MHz bandwidth
Receive, then according to the timing information obtained by synchronizing signal, in the moment point that physical channel PBCH occurs
Received, it is possible to obtain complete PBCH data, and carry out corresponding demodulation decoding, it is possible to
Obtain mib information.
Present handling process be although it is correct, but under some scenes, for example when exist interference or
Performance not good problem occurs when cell signal is poor.Because if receiving according to 1.4MHz bandwidth,
The reference signal (RS) that so can be utilized for channel estimation is less, and the accuracy of channel estimation results declines,
Cause the demodulation performance of physical channel PBCH to decline, the decoding error of follow-up mib information may be caused.
The content of the invention
The technical problem to be solved is to provide a kind of side for lifting physical channel PBCH demodulation performances
Method and device, to solve the problems, such as that PBCH demodulation performances deteriorate under weak letter, interference environment.
The technical scheme that the present invention is adopted to solve above-mentioned technical problem is a kind of lifting physical channel PBCH
The method of demodulation performance, comprises the following steps：A. the frequency range according to belonging to currently received frequency, it is determined that should
One or more bandwidth that the cell of frequency range is supported；B. according to this one or more with the maximum bandwidth of alleviating distention in middle-JIAO
Receive the data of physical channel；C. calculate quality indication signal of the receiving data under one or more bandwidth；
And d. carries out channel estimation and PBCH demodulation according to the best bandwidth of quality indication signal, and to MIB
Decoding.
In one embodiment of this invention, also include after step d：E. judge whether decoding is correct, if
Correct then process terminates, and step f is entered if mistake；F. whether judge to receive number of times less than first threshold,
If it is, return to step b, else process terminates.
In one embodiment of this invention, also include after step d：E. judge whether decoding is correct, if
Correct then process terminates, and step f is entered if mistake；F. whether judge to receive number of times less than first threshold,
If it is, return to step b, otherwise into step g；G. by this, one or more band alleviating distention in middle-JIAO repeatedly receive number
According to the best bandwidth of average signal quality index as new reception bandwidth；H. connect according to new reception bandwidth
Receive the data of PBCH；I. channel estimation and demodulating physical channels are carried out, and MIB is decoded.
In one embodiment of this invention, also include after step i：J. judge whether decoding is correct, if
Correct then process terminates, otherwise into step k；K. whether judge to receive number of times less than Second Threshold, if
It is then return to step h, else process terminates, and judges the MIB decoding failures on frequency PBCH.
In one embodiment of this invention, the Second Threshold is 8.
In one embodiment of this invention, the quality indication signal is reference signal receiving intensity, reference signal
At least one of the quality of reception, signal to noise ratio of reference signal.
In one embodiment of this invention, said method is the mobile terminal execution in LTE system.
The present invention also proposes a kind of device for lifting physical channel PBCH demodulation performances, including：First module,
For the frequency range according to belonging to currently received frequency, one or more for determining that the cell of the frequency range supported
Bandwidth；Second module, for one or more numbers with the maximum bandwidth reception physical channel of alleviating distention in middle-JIAO according to this
According to；Three module, for calculating quality indication signal of the receiving data under one or more bandwidth；The
Four modules, for carrying out channel estimation and demodulating physical channels according to the best bandwidth of quality indication signal, and
Master Information Block MIB is decoded.
In one embodiment of this invention, said apparatus also include：5th module, for whether just to judge decoding
Really, if correct, process terminates, and starts the 6th module if mistake；6th module, for judging to connect
Receive whether number of times is less than first threshold, if it is, the data of physical channel are continued in the second module.
In one embodiment of this invention, said apparatus also include：5th module, for whether just to judge decoding
Really, if correct, process terminates, and starts the 6th module if mistake；6th module, for judging to connect
Receive whether number of times is less than first threshold, if it is, the data of physical channel are continued in the second module,
Otherwise start the 7th module；7th module, for one or more are flat with the multiple receiving data of alleviating distention in middle-JIAO by this
The best bandwidth of quality indication signal is used as new reception bandwidth；8th module, for according to new reception
Bandwidth receives the data of physical channel；And the 9th module, channel estimation and demodulating physical channels are carried out, and
MIB is decoded.
In one embodiment of this invention, said apparatus also include：Tenth module, for whether just to judge decoding
Really, if correct, process terminates, and otherwise starts the 11st module；11st module, for judging to receive
Whether number of times is less than Second Threshold, the data of physical channel is if it is continued in the 8th module, otherwise
Process terminates, and judges the MIB decoding failures of PBCH on the frequency.
The present invention is due to using above technical scheme, being allowed to compared with prior art, specify by using specification
Each frequency range possibility reception bandwidth, and by contrasting the quality indication signal situation of each possible bandwidth,
The reception demodulation physical channel of bandwidth as big as possible is carried out, so as to the demodulation performance for ensureing physical channel is obtained most
It is big to be lifted, improve the decoding accuracy of MIB.
Description of the drawings
It is that the above objects, features and advantages of the present invention can be become apparent, below in conjunction with accompanying drawing to this
Bright specific embodiment elaborates, wherein：
Fig. 1 is the mapping relations of logic channel and transmission channel.
Fig. 2 is the mapping relations of transmission channel and physical channel.
Fig. 3 is the frequency domain position figure of physical channel PBCH.
Fig. 4 is the time-domain position figure of physical channel PBCH.
Fig. 5 is the method flow diagram of the lifting demodulating physical channels performance of first embodiment of the invention.
Fig. 6 is the method flow diagram of the lifting demodulating physical channels performance of second embodiment of the invention.
Fig. 7 is the method flow diagram of the lifting demodulating physical channels performance of third embodiment of the invention.
Fig. 8 is the method flow diagram of the lifting demodulating physical channels performance of fourth embodiment of the invention.
Specific embodiment
Many details are elaborated in the following description in order to fully understand the present invention, but it is of the invention
Alternate manner described here can also be different to implement using other, therefore the present invention is not by described below
Specific embodiment restriction.
Embodiments of the invention description lifts physical channel (Physical Broadcast Channel, PBCH) solution
The method and apparatus of tonality energy, can lift the accuracy of MIB decodings, solve thing under weak letter, interference environment
The problem that reason channel PBCH demodulation performances deteriorate.Embodiments of the invention are the mobile terminals in LTE system
Embodiment.The example of mobile terminal includes smart mobile phone, panel computer, personal digital assistant, wearable sets
It is standby etc..
For LTE system, the bandwidth supported by the cell of different frequency range is different, referring specifically under
(the Table 5.6.1-1 in TS 36.101 of table 1:E-UTRA channel bandwidth).
Table 1
Therefore with regularly using 1.4MHz bandwidth receiving datas compared with, it is possible to obtain belonging to currently received frequency
The bandwidth supported by the cell of frequency, so as to select more particularly suitable reception bandwidth to carry out receiving data.
Fig. 5 is the method flow diagram of the lifting physical channel PBCH demodulation performances of first embodiment of the invention.
With reference to shown in Fig. 5, a kind of method of lifting physical channel PBCH demodulation performances of the present embodiment, including with
Lower step：
In step 501, the frequency range according to belonging to currently received frequency, determine that the cell of the frequency range is supported
One or more bandwidth.
For example, certain frequency belongs to No. 18 frequency ranges of E-UTRA, and retrieval table 1 understands, No. 18 frequencies
The cell of section supports 3 bandwidth, respectively 5MHz, 10MHz and 15MHz.
In step 502, according to this, one or more receive the data of PBCH with the maximum bandwidth of alleviating distention in middle-JIAO.
For example in the supported 3 bands alleviating distention in middle-JIAO of cell of No. 18 frequency ranges, the bandwidth of 15MHz is maximum, therefore presses
The data of PBCH are received according to the bandwidth of 15MHz.The center frequency point of reception depends on No. 18 frequency ranges, that is, exist
Frequency band near the ± 7.5MHz of center frequency point.
In step 503, quality indication signal of the receiving data under one or more bandwidth is calculated.
That is, calculating quality indication signal of the receiving data under each bandwidth.Due to the data for receiving
Receive under maximum bandwidth, therefore when the signal calculated quality under other bandwidth different from maximum bandwidth
During index, it is to intercept the part for receiving signal.The data for for example receiving are connect under the bandwidth of 15MHz
Receive, then when the signal calculated quality index under 10MHz, intercept central authorities 10MHz under 15MHz data
Data, carry out signal calculated quality index；Similarly, when the signal calculated quality index under 5MHz,
The data of central authorities 5MHz under 15MHz data are intercepted, carrys out signal calculated quality index.One can be arranged
Array BAND_SQI_LIST, for depositing the result that each bandwidth signal quality index is calculated after receiving data.
In step 504, channel estimation and PBCH demodulation are carried out according to the best bandwidth of quality indication signal,
And Master Information Block (MIB) is decoded.
That is, comparing the quality indication signal of the data under each bandwidth, selection signal quality index is most
Its data is carried out channel estimation and PBCH demodulation and enters row decoding to mib information by good bandwidth.
In the present embodiment, quality indication signal can be some indexs well known to those skilled in the art, example
Such as reference signal receiving intensity (RSRP), Reference Signal Received Quality (RSRQ), the signal to noise ratio of reference signal
(SNR).Quality indication signal can choose one or more from these indexs.
By the scheme of the present embodiment, the possibility reception bandwidth of each frequency range specified using specification, and pass through
The quality indication signal situation of each possible bandwidth is contrasted, the reception demodulation PBCH of bandwidth as big as possible is carried out,
So as to the demodulation performance for ensureing PBCH obtains maximum lift, the decoding accuracy of mib information is improved.
Fig. 6 is the method flow diagram of the lifting physical channel PBCH demodulation performances of second embodiment of the invention.
With reference to shown in Fig. 6, a kind of method of lifting physical channel PBCH demodulation performances of the present embodiment, including with
Lower step：
In step 601, the frequency range according to belonging to currently received frequency, determine that the cell of the frequency range is supported
One or more bandwidth.
For example, certain frequency belongs to No. 18 frequency ranges of E-UTRA, and retrieval table 1 understands, No. 18 frequencies
The cell of section supports 3 bandwidth, respectively 5MHz, 10MHz and 15MHz.Can arrange one it is maximum
Array BAND_LIST of 6 elements (each frequency range could support up 6 bandwidth in LTE), for depositing
Possible bandwidth.
In step 602, according to this, one or more receive the data of PBCH with the maximum bandwidth of alleviating distention in middle-JIAO.
For example in the supported 3 bands alleviating distention in middle-JIAO of cell of No. 18 frequency ranges, the bandwidth of 15MHz is maximum, therefore presses
The data of PBCH are received according to the bandwidth of 15MHz.The center frequency point of reception depends on No. 18 frequency ranges, that is, exist
Frequency band near the ± 7.5MHz of center frequency point.
In step 603, quality indication signal of the receiving data under one or more bandwidth is calculated.
That is, calculating quality indication signal of the receiving data under each bandwidth.Due to the data for receiving
Receive under maximum bandwidth, therefore when the signal calculated quality under other bandwidth different from maximum bandwidth
During index, it is to intercept the part for receiving signal.The data for for example receiving are connect under the bandwidth of 15MHz
Receive, then when the signal calculated quality index under 10MHz, intercept central authorities 10MHz under 15MHz data
Data, carry out signal calculated quality index；Similarly, when the signal calculated quality index under 5MHz,
The data of central authorities 5MHz under 15MHz data are intercepted, carrys out signal calculated quality index.
In step 604, channel estimation and PBCH demodulation are carried out according to the best bandwidth of quality indication signal,
And Master Information Block (MIB) is decoded.
That is, comparing the quality indication signal of the data under each bandwidth, selection signal quality index is most
Its data is carried out channel estimation and PBCH demodulation and enters row decoding to mib information by good bandwidth.
In step 605, judge whether decoding is correct, and process terminates if correct, enters if mistake
Step 606.
In step 606, whether judge to receive number of times less than first threshold N1, if it is, return to step
602, else process terminates, and judges the MIB decoding failures on frequency PBCH.
That is, if decoding were correct, then process terminates, decoding success.If decoding error,
Whether being then likely due to interference causes, determine whether to receive number of times less than first threshold into step 606
N1, if less than first threshold N1, then return to step 602 proceeds to receive, and is repeated once flow process.When
Receive when number of times reaches first threshold N1 and still decoding error when, flow process is terminated with decoding failure.According to
Experience, first threshold N1 are, for example, 3-6, and such as 4.One reception number of times device RX_COUTER can be set,
A secondary data is received often, RX_COUTER adds 1.The two-dimensional array of one N1*6 can also be set
BAND_SQI_LIST, for the result of each bandwidth signal quality index is calculated after depositing each receiving data.
In the present embodiment, quality indication signal can be some indexs well known to those skilled in the art, example
Such as reference signal receiving intensity (RSRP), Reference Signal Received Quality (RSRQ), the signal to noise ratio of reference signal
(SNR).Quality indication signal can choose one or more from these indexs.
By the scheme of the present embodiment, the possibility reception bandwidth of each frequency range specified using specification, and pass through
The quality indication signal situation of each possible bandwidth is contrasted, the reception demodulation PBCH of bandwidth as big as possible is carried out,
So as to the demodulation performance for ensureing PBCH obtains maximum lift, the decoding accuracy of mib information is improved.Also,
Can be by the multiple reception under maximum bandwidth in decoding error, caused by avoiding interference, decoding is wrong
By mistake.
Fig. 7 is the method flow diagram of the lifting physical channel PBCH demodulation performances of third embodiment of the invention.
With reference to shown in Fig. 7, a kind of method of lifting physical channel PBCH demodulation performances of the present embodiment, including with
Lower step：
In step 701, the frequency range according to belonging to currently received frequency, determine that the cell of the frequency range is supported
One or more bandwidth.
For example, certain frequency belongs to No. 18 frequency ranges of E-UTRA, and retrieval table 1 understands, No. 18 frequencies
The cell of section supports 3 bandwidth, respectively 5MHz, 10MHz and 15MHz.Can arrange one it is maximum
Array BAND_LIST of 6 elements (each frequency range could support up 6 bandwidth in LTE), for depositing
Possible bandwidth.
In step 702, according to this, one or more receive physical channel PBCH's with the maximum bandwidth of alleviating distention in middle-JIAO
Data.
For example in the supported 3 bands alleviating distention in middle-JIAO of cell of No. 18 frequency ranges, the bandwidth of 15MHz is maximum, therefore presses
The data of PBCH are received according to the bandwidth of 15MHz.The center frequency point of reception depends on No. 18 frequency ranges, that is, exist
Frequency band near the ± 7.5MHz of center frequency point.
In step 703, quality indication signal of the receiving data under one or more bandwidth is calculated.
That is, calculating quality indication signal of the receiving data under each bandwidth.Due to the data for receiving
Receive under maximum bandwidth, therefore when the signal calculated quality under other bandwidth different from maximum bandwidth
During index, it is to intercept the part for receiving signal.The data for for example receiving are connect under the bandwidth of 15MHz
Receive, then when the signal calculated quality index under 10MHz, intercept central authorities 10MHz under 15MHz data
Data, carry out signal calculated quality index；Similarly, when the signal calculated quality index under 5MHz,
The data of central authorities 5MHz under 15MHz data are intercepted, carrys out signal calculated quality index.
In step 704, channel estimation and PBCH demodulation are carried out according to the best bandwidth of quality indication signal,
And Master Information Block (MIB) is decoded.
That is, comparing the quality indication signal of the data under each bandwidth, selection signal quality index is most
Its data is carried out channel estimation and PBCH demodulation and enters row decoding to mib information by good bandwidth.
In step 705, judge whether decoding is correct, and process terminates if correct, enters if mistake
Step 706.
In step 706, whether judge to receive number of times less than first threshold N1, if it is, return to step
702, otherwise into step 707.
That is, if decoding were correct, then process terminates, decoding success.If decoding error,
Then being likely due to interference causes, and whether determines whether to receive number of times less than first threshold into step 707,
If less than first threshold N1, then return to step 702 proceeds to receive, and is repeated once flow process.Work as reception
When number of times reaches first threshold N1 still decoding error when, to change reception bandwidth in step 707.Root
According to experience, first threshold N1 is, for example, 3-7, and such as 4.One reception number of times device can be set
RX_COUTER, often receives a secondary data, and RX_COUTER adds 1.
In step 707, will be one or more average signal quality indexs with the multiple receiving data of alleviating distention in middle-JIAO best
Bandwidth as new reception bandwidth.
The meansigma methodss of the quality indication signal of the multiple receiving data of each bandwidth during modification, are first calculated, is then compared
Compared with the average signal quality index of each bandwidth, that best bandwidth of the index is i.e. as new reception band
It is wide.For example under maximum reception bandwidth 15MHz, there are 5MHz, 10MHz, 15MHz this 3 kinds of possibility
Bandwidth.To 5MHz bandwidth, the quality indication signal of its each secondary data of reception is calculated, then each time is believed
Number quality index is averaged, and obtains average signal quality index.To 10MHz bandwidth and 15MHz bandwidth
And so.Afterwards, compare the average signal quality index under 5MHz, 10MHz, 15MHz bandwidth.
Assume that the average signal quality index under 10MHz bandwidth is best, then modification reception bandwidth is 10MHz.
The two-dimensional array BAND_SQI_LIST of one N1*6 can be set, by depositing based on after each receiving data
The result of each bandwidth signal quality index is calculated, for carrying out the comparison of step 707.
In step 708, the data of PBCH are received according to new reception bandwidth.
Assume that step 707 modification reception bandwidth is 10MHz, then in step 708, will connect with 10MHz
Receive the data for receiving PBCH.
In step 709, channel estimation and PBCH demodulation are carried out, and Master Information Block (MIB) is decoded.
In the present embodiment, quality indication signal can be some indexs well known to those skilled in the art, example
Such as reference signal receiving intensity (RSRP), Reference Signal Received Quality (RSRQ), the signal to noise ratio of reference signal
(SNR).Quality indication signal can choose one or more from these indexs.
By the scheme of the present embodiment, the possibility reception bandwidth of each frequency range specified using specification, and pass through
The quality indication signal situation of each possible bandwidth is contrasted, the reception demodulation PBCH of bandwidth as big as possible is carried out,
So as to the demodulation performance for ensureing PBCH obtains maximum lift, the decoding accuracy of mib information is improved.Also,
Can be by the multiple reception under maximum bandwidth in decoding error, caused by avoiding interference, decoding is wrong
By mistake.Furthermore, if still decoding error after the multiple reception under maximum bandwidth, reception band can also be changed
Width optimizing receiving data quality, so as to lift the demodulation performance of PBCH.
Fig. 8 is the method flow diagram of the lifting physical channel PBCH demodulation performances of fourth embodiment of the invention.
With reference to shown in Fig. 8, a kind of method of lifting physical channel PBCH demodulation performances of the present embodiment, including with
Lower step：
In step 801, the frequency range according to belonging to currently received frequency, determine that the cell of the frequency range is supported
One or more bandwidth.
For example, certain frequency belongs to No. 18 frequency ranges of E-UTRA, and retrieval table 1 understands, No. 18 frequencies
The cell of section supports 3 bandwidth, respectively 5MHz, 10MHz and 15MHz.Can arrange one it is maximum
Array BAND_LIST of 6 elements (each frequency range could support up 6 bandwidth in LTE), for depositing
Possible bandwidth.
In step 802, according to this, one or more receive the data of PBCH with the maximum bandwidth of alleviating distention in middle-JIAO.
For example in the supported 3 bands alleviating distention in middle-JIAO of cell of No. 18 frequency ranges, the bandwidth of 15MHz is maximum, therefore presses
The data of PBCH are received according to the bandwidth of 15MHz.The center frequency point of reception depends on No. 18 frequency ranges, that is, exist
Frequency band near the ± 7.5MHz of center frequency point.
In step 803, quality indication signal of the receiving data under one or more bandwidth is calculated.
That is, calculating quality indication signal of the receiving data under each bandwidth.Due to the data for receiving
Receive under maximum bandwidth, therefore when the signal calculated quality under other bandwidth different from maximum bandwidth
During index, it is to intercept the part for receiving signal.The data for for example receiving are connect under the bandwidth of 15MHz
Receive, then when the signal calculated quality index under 10MHz, intercept central authorities 10MHz under 15MHz data
Data, carry out signal calculated quality index；Similarly, when the signal calculated quality index under 5MHz,
The data of central authorities 5MHz under 15MHz data are intercepted, carrys out signal calculated quality index.
In step 804, channel estimation and PBCH demodulation are carried out according to the best bandwidth of quality indication signal,
And Master Information Block (MIB) is decoded.
That is, comparing the quality indication signal of the data under each bandwidth, selection signal quality index is most
Its data is carried out channel estimation and PBCH demodulation and enters row decoding to mib information by good bandwidth.
In step 805, judge whether decoding is correct, and process terminates if correct, enters if mistake
Step 806.
In step 806, whether judge to receive number of times less than first threshold N1, if it is, return to step
802, otherwise into step 807.
That is, if decoding were correct, then process terminates, decoding success.If decoding error,
Then being likely due to interference causes, and whether determines whether to receive number of times less than first threshold into step 808,
If less than first threshold N1, then return to step 802 proceeds to receive, and is repeated once flow process.Work as reception
When number of times reaches first threshold N1 still decoding error when, to change reception bandwidth in step 807.Root
According to experience, first threshold N1 is, for example, 3-8, and such as 4.One reception number of times device can be set
RX_COUTER, often receives a secondary data, and RX_COUTER adds 1.
In step 807, will be one or more average signal quality indexs with the multiple receiving data of alleviating distention in middle-JIAO best
Bandwidth as new reception bandwidth.
The meansigma methodss of the quality indication signal of the multiple receiving data of each bandwidth during modification, are first calculated, is then compared
Compared with the average signal quality index of each bandwidth, that best bandwidth of the index is i.e. as new reception band
It is wide.For example under maximum reception bandwidth 15MHz, there are 5MHz, 10MHz, 15MHz this 3 kinds of possibility
Bandwidth.To 5MHz bandwidth, the quality indication signal of its each secondary data of reception is calculated, then each time is believed
Number quality index is averaged, and obtains average signal quality index.To 10MHz bandwidth and 15MHz bandwidth
And so.Afterwards, compare the average signal quality index under 5MHz, 10MHz, 15MHz bandwidth.
Assume that the average signal quality index under 10MHz bandwidth is best, then modification reception bandwidth is 10MHz.
The two-dimensional array BAND_SQI_LIST of one N1*6 can be set, by depositing based on after each receiving data
The result of each bandwidth signal quality index is calculated, for carrying out the comparison of step 807.
In step 808, the data of PBCH are received according to new reception bandwidth.
Assume that step 807 modification reception bandwidth is 10MHz, then in step 808, will connect with 10MHz
Receive the data for receiving PBCH.
In step 809, channel estimation and demodulating physical channels are carried out, and Master Information Block (MIB) is decoded.
In step 810, judge whether decoding is correct, and process terminates if correct, otherwise into step 811.
In step 811, judge to receive whether number of times is less than Second Threshold N2, if it is return to step 808,
Else process terminates, and judges the MIB decoding failures on frequency PBCH.
That is, if step 810 were decoded correctly, then process terminates, decoding success.If
Decoding error, then being likely due to interference causes, and determines whether whether reception number of times is little into step 811
In Second Threshold N2, if less than first threshold N2, then return to step 808 proceeds to receive, and repeats one
Secondary flow process.When receiving number of times and reaching Second Threshold N2 during still decoding error, terminate flow process and judge
MIB decoding failures on frequency PBCH.
Here, Second Threshold N2 can be 8, during this is consideration physical channel PBCH, 4 modules can be constituted
Partial data, therefore 7 secondary datas of reception (being less than 8 times) are obtained partial data.If receiving 7 secondary datas
Still decoding error, then judge decoding failure.Certainly, Second Threshold N2 can also be other numerical value.Can be with
Reception number of times device RX_COUTER using before calculating the data receiver number of times after modification under bandwidth, often
A secondary data is received, RX_COUTER adds 1.So, after step 806, RX_COUTER resets.
In the present embodiment, quality indication signal can be some indexs well known to those skilled in the art, example
Such as reference signal receiving intensity (RSRP), Reference Signal Received Quality (RSRQ), the signal to noise ratio of reference signal
(SNR).Quality indication signal can choose one or more from these indexs.
By the scheme of the present embodiment, the possibility reception bandwidth of each frequency range specified using specification, and pass through
The quality indication signal situation of each possible bandwidth is contrasted, the reception demodulation PBCH of bandwidth as big as possible is carried out,
So as to the demodulation performance for ensureing PBCH obtains maximum lift, the decoding accuracy of mib information is improved.Also,
If still decoding error after multiple reception under maximum bandwidth, reception bandwidth can also be changed and connect to optimize
The quality of data is received, so as to lift the demodulation performance of PBCH.Furthermore, can be by same in decoding error
Multiple reception under one bandwidth, avoids interference caused decoding error.
The method of the lifting demodulating physical channels performance of the above embodiment of the present invention can be soft in such as computer
It is carried out in the computer-readable medium of the combination of part, hardware or computer software and hardware.For hard
Part implement for, embodiment described in the present invention can one or more special ICs (ASIC),
Digital signal processor (DSP), digital signal processor (DAPD), PLD (PLD),
Field programmable gate array (FPGA), processor, controller, microcontroller, microprocessor, it is used for
The selection for performing other electronic installations or said apparatus of above-mentioned functions combines to be carried out.In partial picture
Under, this kind of embodiment can be implemented by controller.
For implementing to software, embodiment described in the present invention can pass through such as program module
(procedures) and the independent software module such as function module (functions) is being carried out, wherein often
One module performs one or more functions described herein and operation.Software code can be by suitably compiling
Journey language calls the turn the application software write to be carried out, and can be stored in internal memory, by controller or processor
Perform.A kind of device of lifting demodulating physical channels performance of such as one embodiment of the invention, including the first mould
Block, the second module, three module and the 4th module.First module is for according to belonging to currently received frequency
Frequency range, determine one or more bandwidth that the cell of the frequency range is supported.Second module for according to this one
Individual or multiple bandwidth maximum with alleviating distention in middle-JIAO receive the data of physical channel.Three module is used to calculate receiving data
Quality indication signal under one or more bandwidth.4th module is for best according to quality indication signal
Bandwidth carry out channel estimation and demodulating physical channels, and Master Information Block (MIB) is decoded.
In the preferred embodiment, the device for lifting demodulating physical channels performance also includes the 5th module and the 6th mould
Block.5th module is used to judge whether decoding is correct, and process terminates if correct, starts if mistake
6th module.6th module is used to judge that whether receive number of times is less than first threshold, if it is, second
Module continues to the data of physical channel, and else process terminates, and judges the MIB decodings on frequency PBCH
Failure.
In the preferred embodiment, the device for lifting demodulating physical channels performance also includes the 5th module, the 6th mould
Block, the 7th module, the 8th module and the 9th module.Whether correctly 5th module is used to judge decoding, if
Correct then process terminates, and starts the 6th module if mistake.6th module is used to judge whether receive number of times
Less than first threshold, if it is, the data of physical channel are continued in the second module, otherwise start
Seven modules.7th module refers to for one or more average signal qualities with the multiple receiving data of alleviating distention in middle-JIAO by this
The best bandwidth of mark is used as new reception bandwidth.8th module is believed for receiving physics according to new reception bandwidth
The data in road.9th module carries out channel estimation and demodulating physical channels, and Master Information Block (MIB) is translated
Code.
In the preferred embodiment, the device for lifting demodulating physical channels performance also includes the tenth module and the 11st
Module.Whether correctly tenth module is used to judge decoding, and if correct, process terminates, and otherwise starts the tenth
One module.Whether 11st module is used to judge to receive number of times less than Second Threshold, if it is in the 8th mould
Block continues to the data of physical channel, and else process terminates, and judges the MIB decodings on frequency PBCH
Failure.
Although the present invention is described with reference to current specific embodiment, common skill in the art
Art personnel it should be appreciated that the embodiment of the above is intended merely to the explanation present invention, without departing from essence of the invention
Various equivalent change or replacement can be also made in the case of god, therefore, as long as in the connotation of the present invention
In the range of the change of above-described embodiment, modification will all be fallen in the range of following claims.
Claims (11)
1. a kind of method for lifting physical channel PBCH demodulation performances, comprises the following steps：
A. the frequency range according to belonging to currently received frequency, determine that the cell of the frequency range is supported one or many
Individual bandwidth；
B. according to this, one or more receive the data of PBCH with the maximum bandwidth of alleviating distention in middle-JIAO；
C. calculate quality indication signal of the receiving data under one or more bandwidth；
D. channel estimation and PBCH demodulation are carried out according to quality indication signal highest bandwidth, and to main information
Block MIB is decoded.
2. the method for claim 1, it is characterised in that also include after step d：
E. judge whether decoding is correct, and process terminates if correct, step f is entered if mistake；
F. whether judge to receive number of times less than first threshold, if it is, return to step b, else process terminates.
3. the method for claim 1, it is characterised in that also include after step d：
E. judge whether decoding is correct, and process terminates if correct, step f is entered if mistake；
F. judge to receive whether number of times is less than first threshold, if it is, return to step b, otherwise into step
g；
G. the bandwidth that one or more average signal quality indexs with the multiple receiving data of alleviating distention in middle-JIAO are best by this is made
For new reception bandwidth；
H. the data of PBCH are received according to new reception bandwidth；
I. channel estimation and PBCH demodulation are carried out, and MIB is decoded.
4. method as claimed in claim 3, it is characterised in that also include after step i：
J. judge whether decoding is correct, and process terminates if correct, otherwise into step k；
K. judge to receive whether number of times is less than Second Threshold, if it is return to step h, else process terminates,
Judge the MIB decoding failures on frequency PBCH.
5. method as claimed in claim 4, it is characterised in that the Second Threshold is 8.
6. the method for claim 1, it is characterised in that the quality indication signal is connect for reference signal
Receive at least one of intensity, Reference Signal Received Quality, signal to noise ratio of reference signal.
7. the method for claim 1, it is characterised in that performed in the mobile terminal of LTE system.
8. it is a kind of lifted physical channel PBCH demodulation performances device, including：
First module, for the frequency range according to belonging to currently received frequency, determines that the cell of the frequency range is propped up
One or more bandwidth held；
Second module, for one or more numbers with the maximum bandwidth reception physical channel of alleviating distention in middle-JIAO according to this
According to；
Three module, for calculating quality indication signal of the receiving data under one or more bandwidth；
4th module, for carrying out channel estimation and physical channel solution according to the best bandwidth of quality indication signal
Adjust, and Master Information Block MIB is decoded.
9. device as claimed in claim 8, it is characterised in that also include：
5th module, for judging whether decoding is correct, and process terminates if correct, opens if mistake
Dynamic 6th module；
6th module, for whether judging to receive number of times less than first threshold, if it is, in the second module
Continue to the data of physical channel.
10. device as claimed in claim 9, it is characterised in that also include：
5th module, for judging whether decoding is correct, and process terminates if correct, opens if mistake
Dynamic 6th module；
6th module, for whether judging to receive number of times less than first threshold, if it is, in the second module
The data of physical channel are continued to, otherwise starts the 7th module；
7th module, for one or more average signal quality indexs with the multiple receiving data of alleviating distention in middle-JIAO by this
Best bandwidth is used as new reception bandwidth；
8th module, for the data of PBCH are received according to new reception bandwidth；And
9th module, carries out channel estimation and demodulating physical channels, and MIB is decoded.
11. devices as claimed in claim 10, it is characterised in that also include：
Tenth module, for judging whether decoding is correct, and process terminates if correct, otherwise starts the tenth
One module；
11st module, for whether judging to receive number of times less than Second Threshold, if it is in the 8th module
The data of physical channel are continued to, else process terminates, judge that the MIB decodings on frequency PBCH are lost
Lose.
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| CN106559805B (en) | 2020-01-14 |
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