CN102638326B - Method and device for judging decoding reliability - Google Patents

Abstract

The invention provides a method and a device for judging decoding reliability. The method comprises the following steps of: performing relevant operation on data required to be decoded, and outputting decoding data, a maximum peak value and a secondary peak value after relevant operation; calculating a reliability factor according to the maximum peak value, the secondary peak value and the average power of the data required to be decoded; and comparing the reliability factor with a preset threshold value to determine the reliability of the decoded data according to a comparison result. In the method, the reliability of the decoding data is further judged by adopting the maximum peak value and the secondary peak value after relevant operation, so that the problem of reliability judgment of decoded information is solved, and the reliability and effectiveness of decoded information are ensured.

Description

Reliability of decode determination methods and device

Technical field

The present invention relates to the communications field, in particular to a kind of reliability of decode determination methods and device.

Background technology

LTE (Long Term Evolution, Long Term Evolution) is subject to the favor of Mobile Communication Industry always.Along with the development of LTE technology, increasing world-leading operator is one after another using the evolution tendency that LTE faces the future as network, and equipment manufacturers also increase the input in LTE field one after another, thus has promoted the continuous advance of LTE.Compared with 3G, LTE has following technical characteristic: (1) traffic rate improves, and downlink peak rates is 100Mbps, upper behavior 50Mbps; (2) spectrum efficiency improves; (3) QoS ensures, by the service quality of system and strict QoS mechanism real time business (as VoIP); (4) reduce wireless network time delay, subframe lengths 0.5ms and 0.675ms, solves backward compatible problem, and reduces network delay; (5) adding cell boarder bit rate, increasing cell boarder bit rate etc. when keeping current base station location constant.

The physical channel of LTE system mainly comprises Traffic Channel and control channel, wherein for the feedback information ACK/NACK of downlink traffic channel at ascending control channel PUCCH (Physical Uplink Control Channel, be called for short PUCCH) or reverse link traffic channel PUSCH (Physical Uplink Shared Channel is called for short PUSCH) upper transmission; Channel quality information CQI (Channel Quality Indication is called for short CQI) also transmits on PUCCH or PUSCH.At present, for control information, there is no correct judgment or error at receiving terminal.If the control information that receiving terminal decoding goes out is wrong, the problems such as MAC (Media Access Control, medium access control) layer scheduling error may be caused, and then throughput of system may be caused to decline.

In signal processing, receiving terminal needs decoding to go out the information of transmitting terminal.Due to channel fading, time the factor such as offset frequency is inclined existence, the information that decoding goes out might not be the information that transmitting terminal sends.Can judge that whether the information that decoding goes out is correct by cyclic redundancy check (CRC) position for Traffic Channel, but do not have check digit to judge that decoding is whether correct for control information, so how receiving terminal judges whether it is reliably a crucial problem to the control information that decoding goes out.

For control information, the scheme of receiving terminal decoding has a lot, and wherein common one is: receiving terminal, by asking relevant operation (namely passing through related operation), then carrys out according to maximum peak value the information that decoding transmitting terminal sends.So for asking relevant decoding scheme, how to judge that whether the information that decoding goes out is effectively reliable, not yet proposing effective solution at present.

Summary of the invention

Main purpose of the present invention is the determination methods and the device that provide a kind of reliability of decode, at least to solve the whether reliable and effective problem of the above-mentioned information how judging that decoding goes out.

According to an aspect of the present invention, providing a kind of reliability of decode determination methods, comprising: to needing the data of decoding to carry out related operation, and exporting the decoding data after related operation, peak-peak and minor peaks; According to peak-peak and minor peaks and need the average power of the data of decoding to calculate reliability factor; Reliability factor and the threshold value preset are compared, according to the reliability of comparative result determination decoding data.

Further, according to peak-peak and minor peaks and need before the average power of the data of decoding calculates reliability factor, also to comprise: calculate the average power needing the data of decoding.

Further, the computing formula of average power is: wherein, Pow is the average power of the data needing decoding, a _ifor needing the data of decoding, N is the length of data.

Further, the computing formula of reliability factor is: wherein, D is reliability factor, and Peak is peak-peak, and SecPeak is minor peaks.

Further, reliability factor and the threshold value preset are compared, according to the reliability of comparative result determination decoding data, comprising: reliability factor and threshold value are compared, if reliability factor is more than or equal to threshold value, then determine that decoding data is reliable; Otherwise, then determine that decoding data is unreliable.

According to a further aspect in the invention, providing a kind of reliability of decode judgment means, comprising: related operation module, for needing the data of decoding to carry out related operation, and exporting the decoding data after related operation, peak-peak and minor peaks; Reliability factor computing module, for according to peak-peak and minor peaks and need the average power of the data of decoding to calculate reliability factor; Reliability judge module, for comparing reliability factor and the threshold value preset, according to the reliability of comparative result determination decoding data.

Further, reliability of decode judgment means also comprises: power computation module, for calculating the average power of the data needing decoding.

Further, the computing formula of average power is: wherein, Pow is the average power of the data needing decoding, a _ifor needing the data of decoding, N is the length of data.

Further, the computing formula of reliability factor is: wherein, D is reliability factor, and Peak is peak-peak, and SecPeak is minor peaks.

Further, reliability judge module also for: reliability factor and threshold value are compared, if reliability factor is more than or equal to threshold value, then determine that decoding data is reliable; Otherwise, then determine that decoding data is unreliable.

By the present invention, adopt the peak-peak after related operation and minor peaks to judge the reliability of decoding data further, solve the reliability decision problem of the information that decoding goes out, thus ensure that the effectively reliable of the information that decoding goes out.

Accompanying drawing explanation

Accompanying drawing described herein is used to provide a further understanding of the present invention, and form a application's part, schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:

Fig. 1 is the determination methods flow chart of the reliability of decode according to the embodiment of the present invention;

Fig. 2 is the judgment means schematic diagram of the reliability of decode according to the embodiment of the present invention;

Fig. 3 is the determination methods schematic diagram of the reliability of decode according to the embodiment of the present invention one; And

Fig. 4 is the determination methods schematic diagram of the reliability of decode according to the embodiment of the present invention two.

Embodiment

Hereinafter also describe the present invention in detail with reference to accompanying drawing in conjunction with the embodiments.It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.

Fig. 1 is the determination methods flow chart of the reliability of decode according to the embodiment of the present invention, as shown in Figure 1, comprises the following steps:

Step S102, to needing the data of decoding to carry out related operation, and exports the decoding data after related operation, peak-peak and minor peaks.

Step S104, according to peak-peak and minor peaks and need the average power of the data of decoding to calculate reliability factor.

Step S106, compares reliability factor and the threshold value preset, according to the reliability of comparative result determination decoding data.

In the above-mentioned methods, judged the reliability of decoding data by the peak-peak after employing related operation and minor peaks further, solve the reliability decision problem of the information that decoding goes out, thus ensure that the effectively reliable of the information that decoding goes out.

Wherein, before step S104, also comprise: calculate the average power needing the data of decoding, the computing formula of average power is: wherein, Pow is the average power of the data needing decoding, a _ifor needing the data of decoding, N is the length of data.

Wherein, in step S104, the computing formula of reliability factor is: wherein, D is reliability factor, and Peak is peak-peak, and SecPeak is minor peaks.

Wherein, in step S104, reliability factor and threshold value are compared, if reliability factor is more than or equal to threshold value, then determine that decoding data is reliable; Otherwise, then determine that decoding data is unreliable.

Fig. 2 is the judgment means schematic diagram of the reliability of decode according to the embodiment of the present invention, and as shown in Figure 2, this device comprises: related operation module 10, reliability factor computing module 20 and reliability judge module 30.

Wherein, related operation module 10, for needing the data of decoding to carry out related operation, and exports the decoding data after related operation, peak-peak and minor peaks; Reliability factor computing module 20, for according to peak-peak and minor peaks and need the average power of the data of decoding to calculate reliability factor; Reliability judge module 30, for comparing reliability factor and the threshold value preset, according to the reliability of comparative result determination decoding data.

In said apparatus, judged the reliability of decoding data by the peak-peak after employing related operation and minor peaks further, solve the reliability decision problem of the information that decoding goes out, thus ensure that the effectively reliable of the information that decoding goes out.

Wherein, said apparatus also comprises power computation module, and power computation module is for calculating the average power of the data needing decoding, and the computing formula of average power is: wherein, Pow is the average power of the data needing decoding, a _ifor needing the data of decoding, N is the length of data.

Wherein, the computing formula of reliability factor is: wherein, D is reliability factor, and Peak is peak-peak, and SecPeak is minor peaks.

Wherein, the reliability deterministic process of reliability judge module 30 is: reliability factor and threshold value are compared, if reliability factor is more than or equal to threshold value, then determines that decoding data is reliable; Otherwise, then determine that decoding data is unreliable.

Embodiment one

In LTE system, when feedback information HAQR-ACK is multiplexer mode, and be multiplexing on reverse link traffic channel time, if when the bit number of feedback information is greater than 2 bit, so making a start, is RM can be adopted to encode to information bit, needs to carry out RM decoding to the feedback information of transmission accordingly at receiving terminal.May send feedback information because make a start, also may not send feedback information, therefore need receiving terminal to carry out reliability judgement to the HAQR-ACK data after RM decoding, if be judged to reliable, then thinking makes a start have sent HAQR-ACK really; If it is unreliable to be judged to, then thinking makes a start does not send HAQR-ACK.

Fig. 3 is the determination methods schematic diagram of the reliability of decode according to the embodiment of the present invention one, as shown in Figure 3, comprises the following steps:

Step S302, calculates the data (a waiting to send into RM decoding module ₁..., a _n, wherein N is the length of data) average power Pow, specific formula for calculation is;

Step S304, to the data a sending into related operation module ₁..., a _nafter carrying out RM decoding, export decoding data b ₁..., b _l, wherein L is the length of decoding data, and exports the peak-peak Peak and minor peaks Peak that obtain in RM decode procedure;

Step S306, utilizes the data average power Pow of peak-peak Peak and minor peaks Peak and step S302, and calculate reliability factor D, concrete computing formula is as follows:

Step S308, compares reliability factor D and given threshold value thresh, if D is more than or equal to given threshold value thresh, then thinks that decoding data is HARQ-ACK information really; Otherwise thinking makes a start does not send HARQ-ACK information.

Embodiment two

In LTE system, when during transmission of channel quality information, making a start on ascending control channel, being that RM coding is adopted to channel quality information bits, needing docking collection of letters breath to carry out RM decoding at receiving terminal accordingly and obtaining channel quality information.Because be smoothing filtering for channel quality information, namely by the channel quality information that the mode of weighting utilizes the next level and smooth current decoding of history value to go out, if the information that current decoding goes out is reliable, the weight of current decoding information so can be strengthened; If the unreliable information that current decoding goes out, the weight of current decoding information so can be reduced.By judging the reliability of current decoding information, Fig. 4 is the determination methods schematic diagram of the reliability of decode according to the embodiment of the present invention two, as shown in Figure 4, comprises the following steps:

Step S402, calculates the data (a waiting to send into RM decoding module ₁..., a _n, wherein N is the length of data) average power Pow, specific formula for calculation is;

Step S404, to the data a sending into related operation module ₁..., a _nafter carrying out RM decoding, export decoding data b ₁..., b _l, wherein L is the length of decoding data, and exports the peak-peak Peak and minor peaks Peak that obtain in RM decode procedure;

Step S406, utilizes the data average power Pow of peak-peak Peak and minor peaks Peak and the first step, and calculate reliability factor D, concrete computing formula is as follows:

Step S408, compares reliability factor D and given threshold value thresh, if D is more than or equal to given threshold value thresh, then it is reliable for thinking that decoding goes out channel quality information, and so reliability mark is set to 1, i.e. Flag=1; Otherwise it is insecure for thinking that decoding goes out channel quality information, so reliability mark is set to 0, i.e. Flag=0.

Step S410, according to reliability sign of flag, weight factor during adaptive Choose filtering.

In above-mentioned enforcement of the present invention, for the decoding data carried out after related operation operation, the peak-peak after related operation and minor peaks is utilized to judge the reliability of decoding data further, solve the reliability decision problem of the information that decoding in prior art goes out, thus ensure that the effectively reliable of the information that decoding goes out.

Obviously, those skilled in the art should be understood that, above-mentioned of the present invention each module or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on network that multiple calculation element forms, alternatively, they can realize with the executable program code of calculation element, thus, they can be stored and be performed by calculation element in the storage device, and in some cases, step shown or described by can performing with the order be different from herein, or they are made into each integrated circuit modules respectively, or the multiple module in them or step are made into single integrated circuit module to realize.Like this, the present invention is not restricted to any specific hardware and software combination.

The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (8)

1. a reliability of decode determination methods, is characterized in that, comprising:

To needing the data of decoding to carry out related operation, and export the decoding data after related operation, peak-peak and minor peaks;

According to described peak-peak and described minor peaks and need the average power of the data of decoding to calculate reliability factor;

Reliability factor and the threshold value preset are compared, determines the reliability of described decoding data according to comparative result;

Wherein, the computing formula of described reliability factor is:

$D=\frac{{\mathrm{Peak}}^2-\mathrm{Sec}{\mathrm{Peak}}^2}{\mathrm{Pow}}$

Wherein, D is reliability factor, and Peak is peak-peak, and SecPeak is minor peaks, and Pow is the average power of the data needing decoding.

2. method according to claim 1, is characterized in that, according to described peak-peak and described minor peaks and need before the average power of the data of decoding calculates reliability factor, also to comprise:

Calculate the described average power needing the data of decoding.

3. method according to claim 2, is characterized in that, the computing formula of described average power is:

$\mathrm{Pow}=\frac{1}{N}\underset{i=1,..N}{\mathrm{\Σ}}{\left|a_i\right|}^2$

Wherein, a _ifor needing the data of decoding, N is the length of data.

4. method according to claim 3, is characterized in that, reliability factor and the threshold value preset is compared, determines the reliability of described decoding data, comprising according to comparative result:

Described reliability factor and described threshold value are compared, if described reliability factor is more than or equal to described threshold value, then determines that described decoding data is reliable; Otherwise, then determine that described decoding data is unreliable.

5. a reliability of decode judgment means, is characterized in that, comprising:

Related operation module, for needing the data of decoding to carry out related operation, and exports the decoding data after related operation, peak-peak and minor peaks;

Reliability factor computing module, for according to described peak-peak and described minor peaks and need the average power of the data of decoding to calculate reliability factor;

Reliability judge module, for reliability factor and the threshold value preset being compared, determines the reliability of described decoding data according to comparative result;

Wherein, the computing formula of described reliability factor is:

$D=\frac{{\mathrm{Peak}}^2-\mathrm{Sec}{\mathrm{Peak}}^2}{\mathrm{Pow}}$

Wherein, D is reliability factor, and Peak is peak-peak, and SecPeak is minor peaks, and Pow is the average power of the data needing decoding.

6. device according to claim 5, is characterized in that, also comprises:

Power computation module, for calculating the described average power needing the data of decoding.

7. device according to claim 6, is characterized in that, the computing formula of described average power is:

$\mathrm{Pow}=\frac{1}{N}\underset{i=1,..N}{\mathrm{\Σ}}{\left|a_i\right|}^2$

Wherein, a _ifor needing the data of decoding, N is the length of data.

8. device according to claim 7, is characterized in that, reliability judge module also for:

Described reliability factor and described threshold value are compared, if described reliability factor is more than or equal to described threshold value, then determines that described decoding data is reliable; Otherwise, then determine that described decoding data is unreliable.