CN102739338B - Method for receiving and detecting special burst - Google Patents
Method for receiving and detecting special burst Download PDFInfo
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- CN102739338B CN102739338B CN201110080914.XA CN201110080914A CN102739338B CN 102739338 B CN102739338 B CN 102739338B CN 201110080914 A CN201110080914 A CN 201110080914A CN 102739338 B CN102739338 B CN 102739338B
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Abstract
The invention relates to the field of mobile communication, and especially relate to a method for receiving and detecting special burst. The method comprises the following steps: calculating an amplitude mean value of symbols of a physical channel to be detected; reconstructing a star sign position of a special burst standard symbol according to a special burst data patterns obtained in advance and the amplitude mean value; calculating a normalized distance metric of the symbols to be detected and the star sign position of the standard symbol; comparing the normalized distance metric and a preset threshold, if the normalized distance metric is smaller than the preset threshold, the physical channel to be detected is special burst, otherwise, the physical channel to be detected is not special burst. The method makes full use of complete information of the symbols of the physical channel to be detected, significantly enhances robustness of special burst detection, and realizes a purpose of balancing higher correct detection rate with lower false alarm rate.
Description
Technical field
The present invention relates to moving communicating field, particularly relate to a kind of reception detection method of special burst.
Background technology
When communicating in the 3-G (Generation Three mobile communication system) being representative with Wideband Code Division Multiple Access (WCDMA) (WCDMA) system and Time Division-Synchronous Code Division Multiple Access (TD-SCDMA), not always there are data to be sent, when high level after link establishment does not have transmission block to be supplied to physical layer transmission format aggregate channel (CCTrCH) for launching, system needs the configuration parameter according to high level, special burst (SB is sent by the dispatching cycle of setting, SpecialBurst), to ensure air interface user equipment (UE, User Equipment) with the Synchronization Control of base station.
According to the relevant regulations of 3GPP TS 25.224, for auxiliary Common Control Channel (SCCPCH), up-downgoing DPCH (DPCH), Physical Uplink Shared Channel (PUSCH) and Physical Downlink Shared Channel, the structure of time slot of special burst is identical with the structure of time slot of the data that high level provides.If there is transformat combination to indicate (TFCI) bit field in structure of time slot, so TFCI bit field all should fill " 0 " bit.Special burst can also carry physical layer control character as transmitting power control (TPC) symbol for inner-loop power control.The data division of special burst is filled to random bit pattern.
Special burst plays the effect maintaining link synchronization when there is not effective Deta bearer in physical channel.As 3GPP TS 25.224, the first stage that dedicated channel is synchronously set up, namely complete one of synchronous parallel optional condition is that UE detects at least one special burst; The second stage that dedicated channel is synchronously set up, namely complete one of synchronous parallel optional condition is within the 160ms time, UE at least one special burst detected and quality higher than pre-determined threshold.In discontinuous transmitting (DTX) scene of radio frames, when high level does not have transmission block to be supplied to any given CCTrCH for launching after link establishment, need first frame distributed interior transmitting special burst stopped in the transmission.Comprise the first frame, if there is the continuous period of special burst period (SBP), wherein there is no the transport module that high level provides, then need to generate another special burst, and launch in the frame that the next one is possible.This pattern must last till high-rise for till CCTrCH provides transmission block; Under this scene, the maintenance of communication link relies on effective detection of special burst completely, and the span of described SBP is 2 ~ 256 radio frames.Describe according to above, effective detection of special burst is directly connected to the foundation of communication link, safeguards and keep.
Existing typical special burst detection method, as following flow process:
1. recipient's receiving demodulation destination channel SB information;
2. extract the TFCI section in SB and implement decoding;
3. do you judge that TFCI decode results is 0? no, then determine that reception information is not SB, carry out normal decoding process; Then continue to perform;
4. extract data division information bit, and implement hard decision process;
5. compare the bit sequence after judgement and predetermined bit sequence, calculate the ratio P of different bit numbers and total sequence bit number; Do you judge that P is less than default error rate thresholding? then show successfully SB to be detected; No, be then considered as SB erroneous judgement.
Above-mentioned special burst receives detection method and there are following problems and shortcomings:
First, fixing is that non-zero scene is considered as no special burst by TFCI decode results, thus in small-signal scene (e.g., cell edge), very easily occurs that the special burst that TFCI mistake bit causes is undetected, cause communication link step-out, have a strong impact on user's impression; Secondly, to the correction judgement of SB sequence comparing based on the hard decision error rate and pre-determined threshold, because hard decision process only uses the positive negative information in I/Q road of data to be tested, arrange based on simple pre-determined threshold, high detection success rate can not be guaranteed (namely, detected object is special burst and the correct probability detected) with the taking into account of low false alarm rate (that is, detected object no special happens suddenly but is mistaken for the probability of special burst).
Summary of the invention
The object of this invention is to provide a kind of detection method of special burst, to strengthen the robustness that special burst detects, realize preferably being detected as taking into account of power and extremely low false alarm rate.
The detection method of a kind of special burst provided by the invention, the method comprises:
Calculate the amplitude equalizing value of physical channel symbols to be detected;
According to the special burst data pattern obtained in advance and described amplitude equalizing value, reconstruct special burst standard symbol constellation positions;
Calculate the normalized cumulant metric of symbol to be detected and standard symbol constellation positions;
More described normalized cumulant metric and pre-determined threshold, if be less than, then physical channel to be detected is special burst, otherwise then physical channel to be detected is not special burst.
Further, said method also has following characteristics:
Described special burst data pattern refers to the pattern that receiving-transmitting sides retrains in advance.
Further, said method also has following characteristics:
The special burst data pattern that described foundation obtains in advance and described amplitude equalizing value, reconstruct special burst standard symbol constellation positions is specially:
Quadrature Phase Shift Keying modulation is carried out to the special burst data pattern obtained in advance;
To Quadrature Phase Shift Keying modulation Output rusults, utilize described amplitude equalizing value weighting, obtain the special burst standard symbol constellation positions of reconstruct.
Further, said method also has following characteristics:
The normalized cumulant metric of described calculating symbol to be detected and standard symbol constellation positions is specially:
Select a predetermined quantity M symbol to be detected and standard symbol constellation positions to implement distance to calculate;
The distance result of calculation of cumulative each symbol to be measured, and utilize amplitude equalizing value and predetermined quantity M to complete normalization calculating.
Further, said method also has following characteristics:
The described special burst data pattern obtained in advance is obtained by following methods:
Recipient collects the special burst pattern sample of the N number of correct reception of predetermined quantity;
Recipient, based on the special burst pattern sample collected, completes the acquisition of special burst data pattern.
Further, said method also has following characteristics:
Described recipient is based on the special burst pattern collected, and the acquisition completing special burst data pattern is specially:
Judge that whether the special burst pattern sample collected is similar, if then continue to perform, otherwise exit;
Carry out contraposition to the special burst pattern sample collected to add up;
According to contraposition accumulation result, extract special burst data pattern.
Further, said method also has following characteristics:
When the described special burst pattern sample length collected is inconsistent, the add up length of Output rusults of final contraposition is consistent with the length of the shortest pattern sample.
Further, said method also has following characteristics:
Described according to contraposition accumulation result, extract special burst data pattern, be specially, according to the numerical value of each element in described contraposition accumulation result, numerical value is more than or equal to the corresponding bit ' 1 ' of N/2, and numerical value is less than the corresponding bit ' 0 ' of N/2.
Further, said method also has following characteristics:
The described special burst pattern sample to collecting carry out contraposition cumulative before, also comprise, bipolarity conversion implemented to the special burst pattern sample respectively collected.
Further, said method also has following characteristics:
Described according to contraposition accumulation result, extract special burst data pattern and be specially: according to the symbol of each element in contraposition accumulation result, symbol is positive corresponding bit ' 1 ', symbol is negative corresponding bit ' 0 ', extracts special burst data pattern.
Further, said method also has following characteristics:
The described special burst data pattern obtained in advance be the special burst data pattern issued in advance according to network side Rule is set.
Further, said method also has following characteristics:
The rule that arranges that described network side issues special burst pattern is in advance specially:
Network side determination special burst data pattern rule is set;
What network side selected predetermined radio resource control information to issue described special burst data pattern arranges rule.
Further, said method also has following characteristics:
The rule that arranges of described special burst data pattern is carried in the non-key expansion cell of radio resource control information.
Further, said method also has following characteristics:
Described radio resource control information is system message block type 5.
Further, said method also has following characteristics:
The rule that arranges of described special burst data pattern refers to that special burst data pattern being set to normally send sequence with routine exists significant difference.
Further, said method also has following characteristics:
There is significant difference and be defined as in the described sequence that normally sends with routine: the number that special burst data pattern and routine normally send in the contraposition XOR result of sequence 1 is more than or equal to 50% of the number of elements participating in computing;
Or special burst data pattern is more than or equal to 50% of the number of elements participating in computing from the number that routine normally sends different bit in sequence pair bit comparison result.
TFCI decode results is no longer received as special burst the reference conditions detected by the present invention, avoids prior art and TFCI mistranslation code cannot be suppressed to cause undetected defect; Simultaneously the present invention, by making full use of the complete information of physical channel symbols to be detected, significantly enhances the robustness that special burst detects, and what realize preferably correct verification and measurement ratio and lower false alarm rate takes into account object.
Accompanying drawing explanation
Fig. 1 is that a kind of special burst that the embodiment of the present invention provides receives the method flow diagram detected;
Fig. 2 is the method flow diagram of a kind of special burst data pattern obtained in advance that the embodiment of the present invention provides;
Fig. 3 is the method flow diagram of the special burst data pattern that another kind that the embodiment of the present invention provides obtains in advance;
Fig. 4 is the special burst standard symbol constellation positions of final acquisition in the present embodiment and physical channel symbols schematic diagram to be detected;
Fig. 5 is embodiment of the present invention performance comparison schematic diagram.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and the embodiments, the method in the present invention is described in further detail.
Embodiments provide a kind of special burst and receive the method detected, as shown in Figure 1,
Comprise the following steps:
Step 101, calculate the amplitude equalizing value of physical channel symbols to be detected;
The special burst data pattern that step 102, foundation obtain in advance and described amplitude equalizing value, reconstruct special burst standard symbol constellation positions;
In this step, described special burst data pattern refers to the pattern that receiving-transmitting sides retrains in advance.
This step is further comprising the steps:
Step 1021 carries out Quadrature Phase Shift Keying modulation (QPSK) to the special burst data pattern obtained in advance;
Step 1022 couple QPSK modulates Output rusults, utilizes described amplitude equalizing value weighting, obtains the special burst standard symbol constellation positions of reconstruct.
Step 103, calculate the normalized cumulant metric of symbol to be detected and standard symbol constellation positions;
This step is further comprising the steps:
Step 1031, Stochastic choice predetermined quantity M symbol to be detected is implemented distance one by one and is calculated with standard symbol constellation positions;
Step 1032, the distance result of calculation of each symbol to be measured is implemented cumulative, and utilize amplitude equalizing value amplitude and predetermined quantity M to complete normalization.
Wherein, i-th symbol data to be detected is calculated in step 1031
ithe standard symbol position ref corresponding with it
idistance have three kinds of computational methods,
(1)
(2)d
i＝(real(data
i)-real(ref
i))
2+(imag(data
i)-imag(ref
i))
2
(3)d
i＝|real(data
i)-real(ref
i)|+|imag(data
i)-imag(ref
i)|
When utilizing formula (1), (3) enforcement distance calculating, described amplitude equalizing value amplitude and predetermined quantity M completes normalized execution mode for accumulated value being completed normalization divided by amplitude equalizing value and predetermined quantity M and obtaining normalized cumulant metric.
When utilize formula (2) implement distance calculate time, described amplitude equalizing value amplitude square and predetermined quantity M complete normalized execution mode for accumulated value being completed normalization divided by amplitude equalizing value and predetermined quantity M and obtaining normalized cumulant metric.Above-mentioned predetermined quantity M value can be more than or equal to 1.
Step 104, more described normalized cumulant metric and pre-determined threshold, be greater than, then physical channel to be detected is not special burst, is less than or equal to, then physical channel to be detected is special burst.
In this step, when previous step utilizes formula (1), (3) enforcement distance calculating and correspondence metric normalization to operate, described pre-determined threshold span 1 ~ 5;
When utilizing formula (2) to implement distance calculating and correspondence metric normalization operation, described pre-determined threshold span 2 ~ 8;
Fig. 2 is a kind of embodiment of the method for the special burst data pattern obtained in advance provided by the invention,
In the present embodiment, what network side issued special burst data pattern based on the non-key expansion cell of radio resource control information (RRC CONNECTION SETUP) arranges rule, and terminal does not possess and receives the ability of network side based on the non-key expansion cell of non-key expansion cell of radio resource control information RRC CONNECTION SETUP.
Step 201, terminal collect the pattern of the special burst of the N number of correct reception of predetermined quantity;
In the present embodiment, collect special burst pattern for terminal, in practice also can network side as recipient, terminal, as transmit leg, is namely collected the pattern of the special burst of the N number of correct reception of predetermined quantity by recipient.
In this step, the reception detection method of special burst can use prior art, and acquiescence uses the special burst pattern retrained in advance with network side; Or use prior art to implement special burst and receive detection, do not use the prior information of any special burst pattern.
In this step, the span of the predetermined quantity N of the special burst of the described correct reception that need collect is for being greater than 1;
Step 202, terminal implement training based on the special burst pattern sample collected, and complete the acquisition of special burst data pattern.
If using network side as recipient, then this step is that network side implements training based on the special burst pattern sample collected, and completes the acquisition of special burst data pattern.
This step comprises further:
Whether the special burst pattern sample 2021, collected by judgement similar? then continue to perform; No, then show that network side special burst pattern sample on-fixed cannot implement training, jump out step 202;
Wherein, the judgment rule whether the special burst pattern sample of described collection is similar is that collected special burst pattern sample has at least two samples completely the same; Or collected special burst pattern sample has at least the number of in the contraposition XOR result between two samples 0 to be more than or equal to 90% of the number of elements participating in computing;
2022a, implement bipolarity conversion to the special burst pattern sample respectively collected, namely bit ' 1 ' is mapped as 1, bit ' 0 ' and is mapped as-1, such as, if one of special burst pattern sample collected for ' 10011001...... '; Then the result of bipolarity conversion is ' 1 ,-1 ,-1,1,1 ,-1-1,1 ... '
2023a, to bipolarity conversion after pattern sample implement contraposition add up
In this step, if when the pattern sample length added up is inconsistent, supplement " 0 " until reach the longest pattern sample length at the afterbody of the longest non-pattern sample.
The symbol of each element in 2024a, foundation contraposition accumulation result, be positive corresponding bit ' 1 ' based on symbol, symbol is the bipolarity inverse process principle of negative corresponding bit ' 0 ', extracts special burst data pattern.
Such as, if contraposition accumulation result is ' 10 ,-10 ,-8,10,10 ,-10 ,-10,6 ... ', then the final special burst pattern extracted is ' 10011001...... '
Optionally, the another kind of acquisition methods of pattern sample is in this step:
Whether the special burst pattern 2021, collected by judgement similar? then continue to perform; No, then show that network side special burst pattern on-fixed cannot implement training, jump out step 202;
2022b, the special burst pattern sample respectively collected directly implemented to contraposition and add up
In this step, if when the pattern sample length added up is inconsistent, only accumulation process is restricted to the shortest pattern sample length scope, namely the add up length of Output rusults of final contraposition is consistent with the length of the shortest pattern sample
In 2023b, foundation contraposition accumulation result, the numerical value of each element extracts special burst data pattern, and such as can be more than or equal to the corresponding bit ' 1 ' of N/2 based on numerical value, numerical value is less than the principle of the corresponding bit ' 0 ' of N/2, extracts special burst data pattern.
Such as, if contraposition accumulation result is ' 10,0,2,10,10,0,0,6 ... ', N=10, then the final special burst pattern extracted is ' 10011001...... '
Further, the length of collected in step 202 special burst pattern sample is consistent;
Determine that the principle that the length of described special burst pattern sample is consistent comprises:
The length of special burst pattern sample is defined as the length of the first special burst correctly received;
The length of special burst pattern sample is defined as the burst length that the probability in the individual special burst correctly received of predetermined quantity N ' is dominant; N ' span 1 ~ N;
Fig. 3 is the another kind of embodiment of the method for the special burst data pattern obtained in advance provided by the invention
In the present embodiment, what network side issued special burst data pattern based on the non-key expansion cell of radio resource control information (RRC CONNECTION SETUP) arranges rule, and terminal possesses the ability receiving this non-key expansion cell;
Concrete grammar flow process comprises:
Step 301, network side arrange rule based on predetermined radio resource control information issue special burst data pattern;
Step 302, terminal receive described radio resource control information and obtain described special burst data pattern rule is set, determine special burst data pattern;
Step 303, when special burst data pattern arrange rule need upgrade time, then return step 301 upgrade rule is set, if do not need upgrade, then repeat step 302.
Wherein, step 301 is further comprising the steps:
Step 3011, network side determination special burst data pattern rule is set;
In this step,
What step 3012, network side selected predetermined radio resource control information to issue described special burst data pattern arranges rule.
In step 3011,
The rule that arranges of described special burst data pattern possesses significantly regular data sequence for special burst data pattern being set to, and namely normally sending sequence with routine exists significant difference;
Wherein, there is significant difference and can be defined as in the described data that normally send with routine, the number that special burst data pattern is set to normally send with routine in the contraposition XOR result of sequence 1 by rule that arranges of described special burst data pattern is more than or equal to 50% of the number of elements participating in computing; Or special burst data pattern is more than or equal to 50% of the number of elements participating in computing from the number that routine normally sends different bit in sequence pair bit comparison result.
Further, the Rule Expression method that arranges of described special burst data pattern can life cycle (cycle) represent with bit information (bitinfo), and the sequence length of bitinfo is equal with cycle, as cycle=4, bitinfo=' 1011 ', then show that described special burst data pattern is being cycled to repeat of ' 1011 ', i.e. ' 10111011...... '; The span 1 ~ 8 of described cycle;
Further, the cycle in rule that arranges of described special burst data pattern is 2, now bitinfo=' 01 ', and namely final special burst data pattern is ' 010101...... ';
In step 3012,
The rule that arranges of described special burst data pattern is carried in the non-key expansion cell of radio resource control information;
Illustrate with system message block type 5 in the present embodiment, namely arrange rule and the relevant parameter of special burst data pattern to add in the non-key expansion cell of System information block SIB5 and to send by network terminal,
Concrete addition manner is, it is non-that sub-cell sysInfoType5-v5yyext-add is added in SIB5
In critical extension cell v5yyNonCriticalExtensions, sysInfoType5-v5yyext-add belongs to SysInfoType5-v5yyext-add-IEs type, and the type is defined as follows:
SysInfoType5-v5yyext-add-IEs::＝SEQUENCE{
special?BurstPara Special?BurstPara?OPTIONAL
}
Further, comprise 1 cell in SysInfoType5-v5yyext-add-IEs type, and the type of described cell is patternParaInfo type, the type is defined as follows:
In practical operation, also can add in the non-key expansion cell of the System information blocks such as System information block SIB11 and send, the same SIB5 of addition manner.
In step 303, the described judgment condition arranging the renewal of rule needs is:
The real-time statistics of side Network Based transceiving data content, current special burst data pattern no longer meets and normally sends the requirement that data exist significant difference
And/or current special burst data pattern exceedes pre-specified time service time; Described pre-specified time value is more than or equal to 10s
And/or network side need to change described special burst data pattern the RRC information type that rule carries is set
And/or other mode trigger data patterns upgrade setting.
The present invention implement special burst data pattern arrange rule issue time, be no longer dependent on the Simple constraint of the receiving-transmitting sides of non-standard aspect, but the radio resource control information of high level Network Based, publish to the terminal within the scope of cell serves, avoid the receiving-transmitting sides that may exist and regular unjustified risk is set; The present embodiment is based on the Information expansion of SIB11 simultaneously, UE at reading SIB11 with while obtaining the resident necessary information in Serving cell, utilize the respective field that the present invention expands, rule being set and completing the acquisition of special burst pattern of network side special burst data pattern can be grasped accurately; In addition, the system information block expansion of content due to the present embodiment uses non-key class scaling option, to not supporting that the terminal that SIB of the present invention expands can not have any impact, guarantees the downward compatibility realizing version.
Introduce a kind of special burst provided by the invention below in conjunction with concrete data and receive the method detected
What network side issued special burst data pattern based on the non-key expansion cell of radio resource control information (RRC CONNECTION SETUP) arranges rule; The transmit leg of special burst refers to network side or terminal, corresponding, recipient refers to terminal or network side.
Step 401, network side arrange rule based on predetermined radio resource control information issue special burst data pattern;
In the present embodiment, the cycle in rule that arranges of special burst data pattern is 2, now bitinfo=' 10 ', and final special burst data pattern is ' 10101010...... '
Do step 402, terminal judges self possess the ability arranging rule supporting to obtain special burst data pattern based on predetermined radio resource control information? be, then receive described radio resource control information and obtain described special burst data pattern rule is set, determine special burst data pattern, otherwise carry out step 403;
In the present embodiment, what network side issued special burst data pattern based on the non-key expansion cell of radio resource control information RRC CONNECTION SETUP arranges rule, and terminal does not possess the ability receiving this non-key expansion cell;
Step 403, recipient collect the pattern of the special burst of the correct reception of predetermined quantity N;
Described recipient can refer to terminal or network side, and accordingly, transmit leg refers to network side or terminal.Namely network side or terminal all can be collected according to the pattern of the special burst received.In the present embodiment, for terminal as recipient.
In the present embodiment, N gets 10; Namely terminal is in the processes such as the down-going synchronous of dedicated channel, the discontinuous transmitting of radio frames, based on the reception detection method of prior art, collects 10 special burst patterns altogether.
Step 404, recipient implement training based on the special burst pattern sample collected, and complete the acquisition of special burst data pattern
In the present embodiment, final special burst data pattern is ' 10101010...... '
Step 405, calculate the amplitude equalizing value of physical channel symbols to be detected;
Step 406, according to the special burst data pattern that obtains in advance ' 10101010...... ' and described amplitude equalizing value, reconstruct special burst standard symbol constellation positions;
The special burst standard symbol constellation positions of final acquisition in the present embodiment and physical channel symbols to be detected are as shown in Figure 4.In the present embodiment, physical channel symbols to be detected is special burst, but due to severe dissemination channel environment, is subject to seriously stained.
Step 407, calculate the normalized cumulant metric of symbol to be detected and standard symbol constellation positions;
In this step, band detects physical channel symbols quantity M and gets 10.
With following formulae discovery distance (2) d
i=(real (data
i)-real (ref
i))
2+ (imag (data
i)-imag (ref
i))
2
The normalized cumulant metric obtained is 2.6.
Step 408, more described normalized cumulant metric and pre-determined threshold, because previous step selecting type (2) calculates distance, the corresponding pre-determined threshold value of the present embodiment is 3;
Normalized cumulant metric 2.6 < 3 obtained in step 407, court verdict physical channel to be detected is special burst.
In the present embodiment, the special burst symbol of the reception caused due to poor channel environments is stained very serious, based on the detection method based on hard decision of prior art, because erroneous judgement has appearred in the data bit more than more than 30%, and the detection failure of special burst; And special burst of the present invention receives detection method, based on the distance metric of complete symbols information with standard constellation positions, effectively control the error that hard decision process brings and worsen, improve the resolution capability that special burst is adjudicated.
The embodiment of the present invention provide with the performance comparison of prior art as shown in Figure 5:
Under Fig. 5 (1)-Fig. 5 (4) respectively illustrates typical wireless channel Case1, Case3, PA3, VA30 tetra-kinds of environment according to 3GPP TS 25.102 standard regulation, the present invention is the prior art (technical scheme in background technology comparatively, the fault-tolerant thresholding of hard decision is set to 20%) be detected as the performance advantage in power in the reception of special burst, through rigorous actual measurement statistics, described performance gain reaches more than 8dB.
Further in above each figure, prior art and the present invention, while the special burst shown in acquisition figure receives and is detected as power, all achieve the false alarm rate of less than 0.1%; If fault-tolerant for hard decision thresholding is arranged further raising by prior art, with realize suitable with the present invention be detected as power time (as, fault-tolerant for hard decision thresholding is arranged and is increased to 50%), then its false alarm rate is even higher by significantly soaring to 25% in weak signal scene (chip-level signal to noise ratio Ec/No < 0dB).
Visible, special burst involved in the present invention receives detection method, by making full use of the complete information of physical channel symbols to be detected, significantly enhances the robustness that special burst detects, and what realize preferably correct verification and measurement ratio and extremely low false alarm rate takes into account object.Meanwhile, special burst involved in the present invention receives detection method, no longer TFCI decode results is received as special burst the reference conditions detected, avoid prior art TFCI cannot be suppressed to mistranslate special burst that code causes is undetected.
In addition, present invention also offers a kind of special burst pattern acquisition methods, the acquisition of special burst pattern is completed than retraining in advance simply in prior art more rationally effectively by collecting special burst pattern sample, and rule is set by what issue special burst data pattern based on predetermined radio resource control information, owing to make use of the field expanded in radio resource control information, reach accuracy and compatibility that rule issue is set.
Those of ordinary skill in the art obviously knows and understands, the reception detection method of a kind of special burst of the present invention for above embodiment only for illustration of the reception detection method of a kind of special burst of the present invention, and be not limited to the reception detection method of a kind of special burst of the present invention.Although effectively described the reception detection method of a kind of special burst of the present invention by embodiment, those of ordinary skill in the art know, the reception detection method of a kind of special burst of the present invention exists many changes and do not depart from spirit of the present invention.When not deviating from the spirit of reception detection method and the essence thereof of a kind of special burst of the present invention; those skilled in the art are when method according to the present invention making various corresponding change or distortion, but these change accordingly or are out of shape the claims all belonging to the reception detection method of a kind of special burst of the present invention.
Claims (15)
1. a reception detection method for special burst, is characterized in that, comprising:
Calculate the amplitude equalizing value of physical channel symbols to be detected;
According to the special burst data pattern obtained in advance and described amplitude equalizing value, reconstruct special burst standard symbol constellation positions;
Calculate the normalized cumulant metric of symbol to be detected and standard symbol constellation positions;
More described normalized cumulant metric and pre-determined threshold, if be less than, then physical channel to be detected is special burst, otherwise then physical channel to be detected is not special burst.
2. the reception detection method of special burst as claimed in claim 1, is characterized in that,
Described special burst data pattern refers to the pattern that receiving-transmitting sides retrains in advance.
3. the reception detection method of special burst as claimed in claim 1, is characterized in that, the special burst data pattern that described foundation obtains in advance and described amplitude equalizing value, and reconstruct special burst standard symbol constellation positions is specially:
Quadrature Phase Shift Keying modulation is carried out to the special burst data pattern obtained in advance;
To Quadrature Phase Shift Keying modulation Output rusults, utilize described amplitude equalizing value weighting, obtain the special burst standard symbol constellation positions of reconstruct.
4. the reception detection method of special burst as claimed in claim 1, it is characterized in that, the normalized cumulant metric of described calculating symbol to be detected and standard symbol constellation positions is specially:
Select a predetermined quantity M symbol to be detected and standard symbol constellation positions to implement distance to calculate;
The distance result of calculation of cumulative each symbol to be measured, and utilize amplitude equalizing value and predetermined quantity M to complete normalization calculating.
5. the reception detection method of special burst as claimed in claim 1, it is characterized in that, the described special burst data pattern obtained in advance is obtained by following methods:
Recipient collects the special burst pattern sample of the N number of correct reception of predetermined quantity;
Recipient, based on the special burst pattern sample collected, completes the acquisition of special burst data pattern.
6. the reception detection method of special burst as claimed in claim 5, is characterized in that, described recipient is based on the special burst pattern collected, and the acquisition completing special burst data pattern is specially:
Judge that whether the special burst pattern sample collected is similar, if then continue to perform, otherwise exit;
Carry out contraposition to the special burst pattern sample collected to add up;
According to contraposition accumulation result, extract special burst data pattern.
7. the reception detection method of special burst as claimed in claim 6, is characterized in that, described in the special burst pattern sample length collected inconsistent time, the add up length of Output rusults of final contraposition is consistent with the length of the shortest pattern sample.
8. the reception detection method of special burst as claimed in claim 6, it is characterized in that, described according to contraposition accumulation result, extract special burst data pattern, be specially, according to the numerical value of each element in described contraposition accumulation result, numerical value is more than or equal to the corresponding bit ' 1 ' of N/2, and numerical value is less than the corresponding bit ' 0 ' of N/2.
9. the reception detection method of special burst as claimed in claim 6, is characterized in that, the described special burst pattern sample to collecting carry out contraposition cumulative before, also comprise, bipolarity conversion implemented to the special burst pattern sample respectively collected.
10. the reception detection method of special burst as claimed in claim 9, it is characterized in that, described according to contraposition accumulation result, extract special burst data pattern to be specially: according to the symbol of each element in contraposition accumulation result, symbol is positive corresponding bit ' 1 ', symbol is negative corresponding bit ' 0 ', extracts special burst data pattern.
The reception detection method of 11. special bursts as claimed in claim 1, is characterized in that, the described special burst data pattern obtained in advance be the special burst data pattern issued in advance according to network side Rule is set.
The reception detection method of 12. special bursts as claimed in claim 11, it is characterized in that, the rule that arranges that described network side issues special burst pattern is in advance specially:
Network side determination special burst data pattern rule is set;
What network side selected predetermined radio resource control information to issue described special burst data pattern arranges rule.
The reception detection method of 13. special bursts as claimed in claim 12, is characterized in that, the rule that arranges of described special burst data pattern is carried in the non-key expansion cell of radio resource control information.
The reception detection method of 14. special bursts as claimed in claim 12, it is characterized in that, described radio resource control information is system message block type SIB5, and the rule that arranges that described network side selects predetermined radio resource control information to issue described special burst data pattern is specially network side arrange rule and the relevant parameter of special burst data pattern to be added in the non-key expansion cell of system message block type SIB5 and to be sent.
The reception detection method of 15. special bursts as claimed in claim 12, it is characterized in that, the rule that arranges of described special burst data pattern refers to that special burst data pattern being set to normally send sequence with routine exists significant difference, and the number that namely special burst data pattern and routine normally send in the contraposition XOR result of sequence 1 is more than or equal to 50% of the number of elements participating in computing; Or special burst data pattern is more than or equal to 50% of the number of elements participating in computing from the number that routine normally sends different bit in sequence pair bit comparison result.
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