CN105577298B - A kind of adaptive method for detecting phases and system - Google Patents
A kind of adaptive method for detecting phases and system Download PDFInfo
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- CN105577298B CN105577298B CN201410615988.2A CN201410615988A CN105577298B CN 105577298 B CN105577298 B CN 105577298B CN 201410615988 A CN201410615988 A CN 201410615988A CN 105577298 B CN105577298 B CN 105577298B
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Abstract
The present invention provides a kind of adaptive method for detecting phases, including：The parameter configuration that self adaptive control obtains phase-detection is carried out according to quality of wireless channel information；Phase-detection and output phase testing result are carried out according to the parameter configuration；Effective phase detection result is selected to export.The present invention is according to quality of wireless channel information, select performance meet demand but the lower Phase Detecting Device of computation complexity, simultaneously also according to quality of wireless channel information, selection can be further simplified the parameter configuration that phase-detection calculates or improves phase-detection performance, and the computation complexity of phase-detection and performance is enable to carry out adaptive adjustment as the variation of environment is broadcast in no line selection.
Description
Technical field
The present invention relates to communication technique field, more particularly to a kind of adaptive method for detecting phases and system.
Background technology
In mobile communication system, radio signal propagation environment is extremely complex, and the signal of antenna for base station transmitting can divide a plurality of road
Through arriving at different times, and each path is all different to the amplitude of signal, phase effect.It therefore can profit
The performance of Radio Link is promoted with these independent or incoherent multiple signals of height.Diversity technique is exactly a kind of profit
The technology of radio link performance is promoted with multiple signals, in a base station using two or more root antennas come to mobile receiver
Emit signal, receiver receives the different editions for the same signal that different transmission antennas are sent out, after merging treatment
It can be obviously improved influence of the wireless propagation environment to signal, promote receptivity.In a wcdma system, a kind of title is used
For the diversity technique of closed-loop diversity mode.Base station carries out transmitting diversity using two transmitting antennas, and mobile receiver uses one
Kind feedback mechanism measures channel information according to reception frequency pilot sign first, then sends feedback information to transmitter to indicate
The signal that transmitter adjusts transmitting antenna sends phase and power so that receiver instantaneous received power maximizes.But it is practical
Feedback channel is not always reliable in communication environments, and there may be mistakes for the feedback information that base station receives, therefore are used
Adjustment phase place may can lead to the reduction of wireless performance with the difference desired by receiver, this mismatch.Therefore mobile
Receiver, which must obtain, emits signal phase adjusted value used in base station, that is, obtains the phase weights of antenna for base station.WCDMA systems
Closed-loop diversity mode scheme of uniting is as shown in Figs. 1-2.Wherein, the phase of a piece antenna of 1 adjustment of closed-loop diversity mode, another day
The phase of line does not adjust, and power does not also adjust, always the mean allocation on two antennas.Assuming that for not making phase adjustment
Antenna be antenna 1, the phase weights of antenna 1 are w1, it is that constant value is used as the antenna of phase adjustment for antenna always
2, phase weights are w2, its desirable 4 kinds of value：Receiver needs
Phase-detection is carried out to calculate to obtain the w that each time slot base station antenna 2 uses2Value.
Currently used method for detecting phases has very much, and one kind is provided in third generation communication system standard physical layer protocol
Verification scheme based on likelihood function, the first step, first construction inspection inequality：
Wherein, Npath represents the number of path for participating in operation,It is the noise of the i-th paths and the general power of interference.Re
() expression takes real in bracket, * to indicate to take the conjugation of plural number.It is to use the special control physical channels pair of DPCCH
The channel estimation that the i-th paths from second transmitting antenna are done,It is to use CPICH common pilot physical channels pair
The channel estimation that the i-th paths from second antenna are done.γ2It is DPCH dedicated physical channel and CPICH common pilots
The ratio between physical channel SNIR measured values.It is the inspection likelihood function to signal phase for 0 or π on the right of inequality.Defined variable
x0, represent the phase estimation value that the base station of receiver even timeslots feedback receives.If inequality above is set up, x0=
0, otherwise x0=π.
Second step constructs another inspection inequality：
Wherein, Im () expressions take imaginary part plural in bracket.Defined variable x1, represent receiver odd numbered slots feedback
The phase estimation value that base station receives.If above formula is set up, x1=-pi/2, otherwise x1=pi/2.
Third walks, and variable x is pressed with reference to table 10、x1With the correspondence of feedback slot, according to the above-mentioned first step and second step
Each time slot of 15 time slots of an inequality pair frame is examined to estimate x0Or x1.When calculating inspection inequality, inspection on the right of inequality
The feedback phase information x ' on each time slot that the acquisition for testing likelihood function value needs receiver to be locally stored0Or x '1, it is also necessary to
The priori error probabilities information of feedback channel is assumed to 4% in agreement.
Table 1
4th step, by following formula, obtains after above-mentioned third step estimates the base station receiving phase value of each time slot
The transmitting antenna phase weight w of base station second2Estimated value：
From the foregoing, it will be seen that this method needs the SNIR for using two kinds of physical channels to measure in calculating process
As a result, it is also necessary to the noise and interference general power of each path, and the inequality left side is examined to also need to division arithmetic, per time slot
It is required for updating above-mentioned calculated value, complexity is higher.Meanwhile the likelihood function value on the right of inequality being examined to use a fixation
Priori error probabilities information 4%, but actual channel is complicated and changeable, therefore feedback error probability is not a fixation
Value, can influence detection performance using fixed value, can not adapt to the variation of wireless channel.
Phase-detection is carried out using trellis algorithm in addition, also having, although this algorithm better performances, needs to calculate each
Time slot each node branch measurement, realizes that computation complexity is higher, and could obtain after postponing certain time calibrated
True result.Further, very have and simplified for the scheme proposed in above-mentioned agreement, do not consider the relevant meters of SNIR
It calculates, the channel estimation value for only using physical channel carries out phase-detection.The computation complexity of such scheme substantially reduces, but it
Do not consider the feature of wireless propagation environment, such as SNIR and feedback priori error probabilities information etc., thus its estimation performance by
The influence of wireless propagation environment is very big, and in the case where channel circumstance is relatively severe, performance has apparent deterioration.It does not have yet simultaneously
Using the local feedback information value stored, also need to carry out the phase estimation of different quadrants to result of calculation, this can be further
Increase computation complexity.Certainly, also there is while proposing simple and complicated Phase Detecting Device, simple scheme is similar to lattice
Shape algorithm carries out the method that phase-detection is proposed, complex scenario proposes to calculate cost function to adjudicate phase adjustment value, this
The method that kind scheme complexity and performance are all carried with above-mentioned agreement is close, but it is not in contact between simple scheme, no
It can be converted between performance and computation complexity according to the variation of wireless propagation environment is adaptive.
Invention content
The purpose of the present invention is to provide a kind of adaptive method for detecting phases and system, with solve existing detection method without
Method takes into account the problem of computation complexity and performance.
In order to solve the above technical problems, the present invention provides a kind of adaptive method for detecting phases, including：
The parameter configuration that self adaptive control obtains phase-detection is carried out according to quality of wireless channel information；
Phase-detection and output phase testing result are carried out according to the parameter configuration；
Effective phase detection result is selected to export.
Further, described to be carried out certainly according to quality of wireless channel information in the adaptive method for detecting phases
Suitable solution obtain phase-detection parameter configuration the step of include：
Quality of wireless channel information is compared with n the first thresholdings, confirms the Phase Detecting Device to be selected, n
For positive integer.
Further, in the adaptive method for detecting phases, after confirming the Phase Detecting Device to be selected
It further include step：
Quality of wireless channel information is compared with n the second thresholdings, is confirmed desired in the Phase Detecting Device
Parameter configuration.
Further, in the adaptive method for detecting phases, the quality of wireless channel information includes receiving to believe
Number with noise and noise power ratio, receive bit error rate and/or Block Error Rate.
Further, in the adaptive method for detecting phases, the parameter configuration includes multi-path information, physics letter
Road receive data with and/or be locally stored phase information.
Correspondingly, the present invention also provides a kind of adaptive phase detections, including：
Self-adaptive controller, for carrying out the ginseng that self adaptive control obtains phase-detection according to quality of wireless channel information
Number configuration；
Phase detection unit, for carrying out phase-detection and output phase testing result according to the parameter configuration；
Testing result unit, for selecting effective phase detection result to export.
Further, in the adaptive phase detection, the phase detection unit includes several phases
Detection module is used to carry out phase-detection and output phase testing result according to the parameter configuration.
Further, in the adaptive phase detection, the self-adaptive controller includes：
First comparison module, for quality of wireless channel information to be compared with n the first thresholdings, confirmation to be selected
Phase Detecting Device, n is positive integer；
Further, in the adaptive phase detection, the self-adaptive controller further includes：
Second comparison module confirms the phase for quality of wireless channel information to be compared with n the second thresholdings
Desired parameter configuration in detection scheme.
Further, in the adaptive phase detection, the quality of wireless channel information includes receiving to believe
Number with noise and noise power ratio, receive bit error rate and/or Block Error Rate.
Further, in the adaptive phase detection, the parameter configuration includes multi-path information, physics letter
Road receive data with and/or be locally stored phase information.
Adaptive method for detecting phases provided by the invention and system, have the advantages that：The present invention is according to wireless
Channel quality information selects performance meet demand but the lower Phase Detecting Device of computation complexity, while also according to wireless communication
Road quality information, selection can be further simplified the parameter configuration that phase-detection calculates or improves phase-detection performance, make phase
The computation complexity and performance of position detection can carry out adaptive adjustment as the variation of environment is broadcast in no line selection.
Description of the drawings
Fig. 1-2 is prior art WCDMA system closed-loop diversity mode schematic diagram；
Fig. 3 is the flow diagram of adaptive method for detecting phases of the invention；
Fig. 4 is the schematic diagram of 1 adaptive method for detecting phases of the embodiment of the present invention.
Specific implementation mode
Adaptive method for detecting phases proposed by the present invention and system are made into one below in conjunction with the drawings and specific embodiments
Step is described in detail.According to following explanation and claims, advantages and features of the invention will become apparent from.It should be noted that attached
Figure is all made of very simplified form and uses non-accurate ratio, only to convenient, lucidly the aid illustration present invention is real
Apply the purpose of example.
As shown in figure 3, a kind of adaptive phase detection of present invention offer and method, the adaptive phase-detection system
System includes self-adaptive controller, phase detection unit and testing result unit.
Self-adaptive controller selects disclosure satisfy that according to quality of wireless channel information in existing Phase Detecting Device
The Phase Detecting Device that channel circumstance performance needs at present and computation complexity is smaller, then according to quality of wireless channel information control
The parameter configuration of the selected Phase Detecting Device of system further decreases computation complexity or improving performance with this.Phase-detection
Unit includes several phase detecting modules, and each module can consider using a kind of independent Phase Detecting Device, their roots
The enabled information that is provided according to self-adaptive controller determines whether oneself is actuated for phase-detection, if started, obtains
The scheme that self-adaptive controller provides carries out phase-detection calculating, if not making any processing without starting.Finally, detection knot
The Phase Detecting Device selection that fruit unit is provided according to self-adaptive controller indicates to read the inspection of corresponding phase detection unit
It surveys as a result, and being exported as final phase detection result.
【Embodiment 1】
As shown in figure 4, the present embodiment uses two kinds of alternative Phase Detecting Devices：Phase detecting module 1 is complicated using calculating
Spend relatively low, but performance is general, and it is multipath number to influence its computation complexity and the major parameter of performance；Phase detecting module
2 using the scheme given by said physical layer protocol, better performances, but computation complexity is higher, and it is complicated to influence its calculating
Degree and the major parameter of performance are also multipath number, while its performance is also influenced by priori feedback error probabilistic information.
Self-adaptive controller obtain quality of wireless channel information Q, quality of wireless channel information mentioned here include but
It is not limited to receive signal and noise and noise power ratio (SNIR), reception bit error rate (BER) or Block Error Rate (BLER), simultaneously
It also obtains phase-detection and calculates the commonly required multi-path information wanted, receives the related data of physical channel and locally stored
Feedback phase information etc..That is, the quality of wireless channel information Q might not represent an information, it may be possible to more
A channel quality information is used in combination, and when making comparisons with thresholding, may include the comparison arranged side by side of multiple channel quality informations
Or comprising comparing.It obtains in this embodiment and receives the quality information of SNIR values and BER values as wireless channel in real time.
Work as SNIR>Qth1When, using Phase Detecting Device 1, otherwise just use Phase Detecting Device 2.If using Phase Detecting Device 1,
So judge SNIR>qthIt is whether true, it sets up and then chooses larger 1~3 multipath progress phase estimation calculating of power, it is no
It then chooses all effective multipaths and carries out estimation calculating；If using Phase Detecting Device 2, BER is judged>q′thIt is whether true, it sets up
1~3 larger multipath of power can then be chosen and carry out phase estimation calculating, all effective multipaths are otherwise chosen and estimated
It calculates, while priori feedback error probabilistic information can also be improved to further increase estimation performance.Last testing result unit
Selected section obtains effective phase detection result according to the instruction of used Phase Detecting Device and exports.
Foregoing description is only the description to present pre-ferred embodiments, not to any restriction of the scope of the invention, this hair
Any change, the modification that the those of ordinary skill in bright field does according to the disclosure above content, belong to the protection of claims
Range.
Claims (11)
1. a kind of adaptive method for detecting phases, which is characterized in that including：
The parameter configuration that self adaptive control obtains phase-detection is carried out according to quality of wireless channel information；
Phase-detection and output phase testing result are carried out according to the parameter configuration；
Effective phase detection result is selected to export；
Wherein, include according to the parameter configuration of quality of wireless channel information progress self adaptive control acquisition phase-detection：Compare nothing
Line channel quality and threshold value are chosen the larger 1-3 multipath progress phase of power and are estimated when quality of wireless channel is more than threshold value
Otherwise meter chooses all effective multipaths and carries out phase estimation.
2. adaptive method for detecting phases as described in claim 1, which is characterized in that described according to quality of wireless channel information
Carrying out the step of self adaptive control obtains the parameter configuration of phase-detection includes：
Quality of wireless channel information is compared with n the first thresholdings, confirms that the Phase Detecting Device to be selected, n are just
Integer.
3. adaptive method for detecting phases as claimed in claim 2, which is characterized in that confirming the phase-detection to be selected
It further include step after scheme：
Quality of wireless channel information is compared with n the second thresholdings, confirms desired parameter in the Phase Detecting Device
Configuration.
4. adaptive method for detecting phases as described in claim 1, which is characterized in that the quality of wireless channel information includes
Receive signal and noise and noise power ratio, reception bit error rate and/or Block Error Rate.
5. adaptive method for detecting phases as described in claim 1, which is characterized in that the parameter configuration includes multipath letter
Breath, physical channel receive data with and/or be locally stored phase information.
6. a kind of adaptive phase detection, which is characterized in that including：
Self-adaptive controller, the parameter for carrying out self adaptive control acquisition phase-detection according to quality of wireless channel information are matched
It sets；
Phase detection unit, for carrying out phase-detection and output phase testing result according to the parameter configuration；
Testing result unit, for selecting effective phase detection result to export；
Wherein, include according to the parameter configuration of quality of wireless channel information progress self adaptive control acquisition phase-detection：Compare nothing
Line channel quality and threshold value are chosen the larger 1-3 multipath progress phase of power and are estimated when quality of wireless channel is more than threshold value
Otherwise meter chooses all effective multipaths and carries out phase estimation.
7. adaptive phase detection as claimed in claim 6, which is characterized in that the phase detection unit includes several
A phase detecting module is used to carry out phase-detection and output phase testing result according to the parameter configuration.
8. adaptive phase detection as claimed in claim 6, which is characterized in that the self-adaptive controller includes：
First comparison module confirms the phase to be selected for quality of wireless channel information to be compared with n the first thresholdings
Position detection scheme, n is positive integer.
9. adaptive phase detection as claimed in claim 8, which is characterized in that the self-adaptive controller also wraps
It includes：Second comparison module confirms the phase-detection for quality of wireless channel information to be compared with n the second thresholdings
Desired parameter configuration in scheme.
10. adaptive phase detection as claimed in claim 6, which is characterized in that the quality of wireless channel packet
It includes and receives signal and noise and noise power ratio, reception bit error rate and/or Block Error Rate.
11. adaptive phase detection as claimed in claim 6, which is characterized in that the parameter configuration includes multipath letter
Breath, physical channel receive data with and/or be locally stored phase information.
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| CN101199083A (en) * | 2005-04-13 | 2008-06-11 | 松下电器产业株式会社 | Adaptive antenna apparatus and radio communication apparatus |
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| CN1384996A (en) * | 1999-10-26 | 2002-12-11 | 艾利森电话股份有限公司 | Adaptive linearization of power amplifiers |
| US20040076185A1 (en) * | 2002-07-09 | 2004-04-22 | Hun-Kee Kim | Apparatus and method for performing adaptive channel estimation in a mobile communication system |
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| US20080025198A1 (en) * | 2004-01-14 | 2008-01-31 | National Institute Of Information And Communications Technology | Communication System, Transmitter, Receiver, Transmitting Method, Receiving Method, And Program |
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