CN105553616B

CN105553616B - Channel quality indicates selection method, adaptive modulation coding method and device

Info

Publication number: CN105553616B
Application number: CN201510959022.5A
Authority: CN
Inventors: 杨�远; 鞠明; 苏加加; 曹晏波; 乔元新
Original assignee: Pla Air Force Armament Department Of Ministry Of Airborne Equipment Outfield Arms Branch; DATANG LINKTECH INFOSYSTEM Co Ltd
Current assignee: Pla Air Force Armament Department Of Ministry Of Airborne Equipment Outfield Arms Branch; DATANG LINKTECH INFOSYSTEM Co Ltd
Priority date: 2015-12-18
Filing date: 2015-12-18
Publication date: 2019-03-29
Anticipated expiration: 2035-12-18
Also published as: CN105553616A

Abstract

The embodiment of the invention discloses a kind of channel quality instruction selection method, adaptive modulation coding method and devices, comprehensively consider signal-to-noise ratio and Block Error Rate selection channel quality indicated value, what the instruction of selected channel quality can preferably react channel is disturbed situation, so that signal sending end is after receiving channel quality indicated value, more suitable modulating-coding format can be selected, thereby may be ensured that link connection in an interference situation and obtains higher channel capacity.Further, for signal sending end after receiving channel quality indicated value, the channel quality indicated value taking service feature into consideration and receiving determines more suitable modulating-coding format, to guarantee link connection in an interference situation in conjunction with business feature.

Description

Channel quality indicates selection method, adaptive modulation coding method and device

Technical field

The present invention relates to fields of communication technology, more specifically to a kind of channel quality instruction selection method, adaptively Modulation coding method and device.

Background technique

Adaptive Modulation and Coding (Adaptive Modulation and Coding, AMC) technology is in public movement It is widely used in communication network, for fighting influence of the channel fading to communication system.Pilot tone is measured by receiving end, obtains letter It makes an uproar compared estimate, then channel quality instruction (Channel Quality Indicator, CQI) value is mapped as by signal-to-noise ratio (SNR) estimation, and It is sent to transmitting terminal by feedback channel, thus transmitting terminal knows current channel condition, select suitable modulating-coding mechanism (Modulation and Coding Scheme, MCS), obtains higher channel capacity.

Common AMC technology only considers that channel bring influences, and only maps CQI by measurement signal-to-noise ratio to reflect channel matter Amount, can not reflect the disturbed condition in present channel, thus be possible to do the CQI feedback to make mistake in an interference situation, Cause transmitting terminal that cannot select suitable MCS, it is possible to cause interrupted communication link.

Summary of the invention

The object of the present invention is to provide a kind of channel qualities to indicate selection method, adaptive modulation coding method and device, To guarantee to obtain higher channel capacity in an interference situation and ensure link connection.

To achieve the above object, the present invention provides the following technical scheme that

A kind of channel quality instruction selection method, is applied to the second communication equipment, comprising:

The signal-to-noise ratio of actual time window is estimated according to signal is received, and counts the Block Error Rate of the actual time window； The signal that receives is sent by the first communication equipment communicated with second communication equipment；

Channel quality indicated value is selected based on the Block Error Rate of the signal-to-noise ratio and the actual time window.

The above method, it is preferred that described that channel is selected based on the Block Error Rate of the signal-to-noise ratio and the actual time window Quality indicates

Channel quality indicated value value range is determined based on the Block Error Rate of the signal-to-noise ratio and the actual time window；

Channel quality indicated value is selected from identified channel quality indicated value value range.

The above method, it is preferred that the Block Error Rate based on the signal-to-noise ratio and the actual time window determines channel Quality indicated value value range includes:

Based on the signal-to-noise ratio and it is pre-stored corresponding with each channel quality indicated value noiseless when mistake block Rate-signal-to-noise ratio curve, Block Error Rate when determining corresponding with each channel quality indicated value noiseless；

From channel quality indicated value corresponding with the Block Error Rate for meeting error block rate requirement, determine that maximum channel quality refers to Indicating value is the measured value that the channel quality of actual time window indicates；The error block rate requirement that meets refers to that the value of Block Error Rate is full Sufficient preset condition；

Based on the Block Error Rate of the actual time window, rollback corresponding with the Block Error Rate of the actual time window is determined Channel quality indicated value, the backoff channel quality indicated value are corresponding with the modulating-coding format that the signal being currently received uses Channel quality indicated value based on rollback preset value determine；

It determines channel quality indicated value value range, includes: channel quality in the channel quality indicated value value range The minimum value CQI of indicated value_min, the corresponding channel quality indicated value of modulating-coding format that the signal being currently received uses CQI_MCS, the measured value CQI of the channel quality instruction of the actual time window_measureAnd the described and current time window The corresponding backoff channel quality indicated value CQI of Block Error Rate of mouth_backoff。

The above method, it is preferred that the Block Error Rate based on the actual time window, the determining and current time window Mouthful the corresponding backoff channel quality indicated value of Block Error Rate include:

If the Block Error Rate of the actual time window is less than or equal to the first preset threshold, with the actual time window The corresponding backoff channel quality indicated value CQI of Block Error Rate_backoffAre as follows: the modulating-coding format that the signal being currently received uses Corresponding channel quality indicated value CQI_MCSWith the difference of the first preset value；

If the Block Error Rate of the actual time window is greater than first preset threshold and less than the second preset threshold, with The corresponding backoff channel quality indicated value CQI of the Block Error Rate of the actual time window_backoffAre as follows: the signal being currently received makes The corresponding channel quality indicated value CQI of modulating-coding format_MCSWith the difference of the second preset value；

If the Block Error Rate of the actual time window is greater than second preset threshold, with the actual time window The corresponding backoff channel quality indicated value CQI of Block Error Rate_backoffAre as follows: the modulating-coding format pair that the signal being currently received uses The channel quality indicated value CQI answered_MCSWith the difference of third preset value；

Wherein, first preset threshold is less than second preset threshold；First preset value is less than described second Preset value, second preset value are less than the third preset value.

The above method, it is preferred that described to select channel quality to refer to from identified channel quality indicated value value range Indicating value includes:

If the Block Error Rate of the actual time window is zero, judge current time slots apart from upper one malfunction time slot time between Every whether in effective time interval, if so, selecting described currently to connect from determined channel quality indicated value value range The corresponding channel quality indicated value CQI of the modulating-coding format that the signal received uses_MCS；If it is not, then from determined channel quality The measured value CQI for selecting the channel quality of the actual time window to indicate in indicated value value range_measure；

If the Block Error Rate of the actual time window is not zero, the channel quality instruction of the actual time window Corresponding first efficiency of measured value channel quality corresponding with the modulating-coding format that the signal being currently received uses refers to Corresponding second efficiency of indicating value selects channel matter according to following selection formula if first efficiency is less than second efficiency Measure indicated value: CQI_select=max { CQI_min,min{CQI_measure,CQI_backoff}}；If first efficiency is greater than described second Efficiency selects channel quality indicated value: CQI according to following selection formula_select=max { CQI_min,CQI_backoff}；

Wherein, CQI_selectFor selected channel quality indicated value.

A kind of adaptive modulation coding method is applied to the first communication equipment, comprising:

The channel matter that the second communication equipment communicated with first communication equipment is sent is received by feedback channel Indicated value is measured, the channel quality indicated value is by second communication equipment according to the letter for receiving signal estimation preset time window It makes an uproar and compares, and count the Block Error Rate of the preset time window；Block Error Rate based on the signal-to-noise ratio and the preset time window Selection determines；

Modulating-coding format is determined according to the channel quality indicated value received；

Modulating-coding format based on the determination is modulated coding to sent signal.

The above method, it is preferred that the channel quality indicated value that the foundation receives determines that modulating-coding format includes:

Determine the type for the business that first communication equipment currently carries；

Modulating-coding format corresponding with identified type of service is determined according to the channel quality indicated value received.

The above method, it is preferred that channel quality indicated value determination and the identified type of service that the foundation receives Corresponding modulating-coding format includes:

If the business that first communication equipment currently carries is the business of type of doing one's best, according to predetermined letter The corresponding relationship of road quality indicated value and modulating-coding format determines modulation corresponding with received channel quality indicated value Coded format is modulating-coding format corresponding with identified type of service.

If the business that first communication equipment currently carries is the business high to reliability requirement, based on received Channel quality indicated value calculates the bit number that next time slot can carry；

If being less than institute based on the bit number that next time slot that received channel quality indicated value is calculated can carry Modulating-coding corresponding with identified type of service is calculated in the bit number for stating the business that the first communication equipment currently carries Format；

If being greater than institute based on the bit number that next time slot that received channel quality indicated value is calculated can carry The bit number for stating the business that the first communication equipment currently carries, using the channel quality indicated value received as the upper limit, from being received To channel quality indicated value start, successively calculate the bit number that corresponding with channel quality indicated value next time slot can carry, It determines when bit number that next time slot can carry is greater than the bit number for the business that first communication equipment currently carries most Small channel quality indicated value is target channel quality indicated value, according to predetermined channel quality indicated value and modulating-coding lattice The corresponding relationship of formula determines that modulating-coding format corresponding with the target channel quality indicated value is and identified service class The corresponding modulating-coding format of type.

If the business that first communication equipment currently carries is to need to keep constant the business of rate link, based on being connect The channel quality indicated value received calculates the bit number that next time slot can carry；

If being less than institute based on the bit number that next time slot that received channel quality indicated value is calculated can carry The bit number for stating the business that the first communication equipment currently carries, according to predetermined channel quality indicated value and modulating-coding lattice The corresponding relationship of formula determines that modulating-coding format corresponding with received channel quality indicated value is and identified business The corresponding modulating-coding format of type；

If being equal to institute based on the bit number that next time slot that received channel quality indicated value is calculated can carry The bit number for stating the business that the first communication equipment currently carries, according to predetermined channel quality indicated value and modulating-coding lattice The corresponding relationship of formula determines that modulating-coding format corresponding with received channel quality indicated value is and identified business The corresponding modulating-coding format of type；

If being greater than institute based on the bit number that next time slot that received channel quality indicated value is calculated can carry The bit number for stating the business that the first communication equipment currently carries, according to predetermined channel quality indicated value and modulating-coding lattice The corresponding relationship of formula determines that modulating-coding format corresponding with received channel quality indicated value is and identified business The corresponding modulating-coding format of type, and when the business that currently carries of first communication equipment and other service integrations are same Gap.

A kind of channel quality instruction selection device, is applied to the second communication equipment, comprising:

Processing module for the signal-to-noise ratio according to reception signal estimation actual time window, and counts the current time The Block Error Rate of window；The signal that receives is sent by the first communication equipment communicated with second communication equipment；

Selecting module, for based on the selection channel quality instruction of the Block Error Rate of the signal-to-noise ratio and the actual time window Value.

Above-mentioned apparatus, it is preferred that the selecting module includes:

Submodule is determined, for determining that channel quality refers to based on the Block Error Rate of the signal-to-noise ratio and the actual time window Indicating value value range；

Submodule is selected, for selecting channel quality indicated value from identified channel quality indicated value value range.

Above-mentioned apparatus, it is preferred that determine that submodule includes:

First determination unit, for based on the signal-to-noise ratio and pre-stored and each channel quality indicated value pair Answer it is noiseless when Block Error Rate-signal-to-noise ratio curve, determine it is corresponding with each channel quality indicated value noiseless when mistake block Rate；

Second determination unit, for being determined from channel quality indicated value corresponding with the Block Error Rate for meeting error block rate requirement Maximum channel quality indicated value is the measured value that the channel quality of actual time window indicates；The error block rate requirement that meets is Refer to that the value of Block Error Rate meets preset condition；

Third determination unit, for the Block Error Rate based on the actual time window, the determining and actual time window The corresponding backoff channel quality indicated value of Block Error Rate, the backoff channel quality indicated value uses with the signal that is currently received The corresponding channel quality indicated value of modulating-coding format based on rollback preset value determine；

4th determination unit, for determining the channel quality indicated value value range, the channel quality indicated value is taken It include: the minimum value CQI of channel quality indicated value in value range_min, modulating-coding format pair that the signal being currently received uses The channel quality indicated value CQI answered_MCS, the measured value CQI of the channel quality instruction of the actual time window_measure, Yi Jisuo State backoff channel quality indicated value CQI corresponding with the Block Error Rate of the actual time window_backoff。

Above-mentioned apparatus, it is preferred that the third determination unit is specifically used for,

Above-mentioned apparatus, it is preferred that the selection submodule is specifically used for,

Wherein, CQI_selectFor selected channel quality indicated value.

A kind of Adaptive Modulation and Coding device is applied to the first communication equipment, comprising:

Receiving module, for receiving the second communication equipment communicated with first communication equipment by feedback channel The channel quality indicated value of transmission, the channel quality indicated value are preset according to signal estimation is received by second communication equipment The signal-to-noise ratio of time window, and count the Block Error Rate of the preset time window；Based on the signal-to-noise ratio and the preset time The Block Error Rate of window selects to determine；

Determining module, for determining modulating-coding format according to the channel quality indicated value received；

Modulating-coding module is modulated volume to sent signal for modulating-coding format based on the determination Code.

Above-mentioned apparatus, it is preferred that the determining module includes:

First determines submodule, for determining the type of business that first communication equipment currently carries；

Second determines submodule, for according to the channel quality indicated value determination and identified type of service pair received The modulating-coding format answered.

Above-mentioned apparatus, it is preferred that described second determines that submodule includes:

First determination unit, if being the industry of type of doing one's best for the business that first communication equipment currently carries Business, according to the determination of the corresponding relationship of predetermined channel quality indicated value and modulating-coding format and received channel matter Measuring the corresponding modulating-coding format of indicated value is modulating-coding format corresponding with identified type of service.

First computing unit, if being the industry high to reliability requirement for the business that first communication equipment currently carries Business, calculates the bit number that next time slot can carry based on received channel quality indicated value；

Second computing unit, if for that can be held based on next time slot that received channel quality indicated value is calculated The bit number of load is less than the bit number for the business that first communication equipment currently carries, and is calculated and identified service class The corresponding modulating-coding format of type；

Second determination unit, if for that can be held based on next time slot that received channel quality indicated value is calculated The bit number of load is greater than the bit number for the business that first communication equipment currently carries, with the channel quality indicated value received Next time slot corresponding with channel quality indicated value is successively calculated since received channel quality indicated value for the upper limit The bit number that can be carried determines that the bit number that next time slot can carry is greater than the business that first communication equipment currently carries Bit number when minimum channel quality indicated value be target channel quality indicated value, according to predetermined channel quality indicate Value and the corresponding relationship of modulating-coding format determine modulating-coding format corresponding with the target channel quality indicated value for The corresponding modulating-coding format of identified type of service.

Third computing unit, if being to need to keep constant rate chain for the business that first communication equipment currently carries The business connect calculates the bit number that next time slot can carry based on received channel quality indicated value；

4th computing unit, if for that can be held based on next time slot that received channel quality indicated value is calculated The bit number of load is less than the bit number for the business that first communication equipment currently carries, and refers to according to predetermined channel quality The corresponding relationship of indicating value and modulating-coding format determines modulating-coding format corresponding with received channel quality indicated value For modulating-coding format corresponding with identified type of service；

Third determination unit, if for that can be held based on next time slot that received channel quality indicated value is calculated The bit number of load is equal to the bit number for the business that first communication equipment currently carries, and refers to according to predetermined channel quality The corresponding relationship of indicating value and modulating-coding format determines modulating-coding format corresponding with received channel quality indicated value For modulating-coding format corresponding with identified type of service；

4th determination unit, if for that can be held based on next time slot that received channel quality indicated value is calculated The bit number of load is greater than the bit number for the business that first communication equipment currently carries, and refers to according to predetermined channel quality The corresponding relationship of indicating value and modulating-coding format determines modulating-coding format corresponding with received channel quality indicated value For modulating-coding format corresponding with identified type of service, and the business that currently carries of first communication equipment with it is other The same time slot of service integration.

By above scheme it is found that a kind of channel quality provided by the present application indicates selection method, Adaptive Modulation and Coding Method and device comprehensively considers signal-to-noise ratio and Block Error Rate selection channel quality indicated value, and selected channel quality instruction can Preferably reaction channel is disturbed situation, so that signal sending end is after receiving channel quality indicated value, Neng Gouxuan More suitable modulating-coding format is selected, link connection in an interference situation is thereby may be ensured that and obtains higher channel and hold Amount.Further, signal sending end is after receiving channel quality indicated value, the channel taking service feature into consideration and receiving Quality indicated value determines more suitable modulating-coding format, to guarantee that link in an interference situation connects in conjunction with business feature It connects.

Detailed description of the invention

In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with It obtains other drawings based on these drawings.

Fig. 1 is a kind of implementation flow chart that channel quality provided by the embodiments of the present application indicates selection method；

Fig. 2 selects channel quality to refer to be provided by the embodiments of the present application based on the Block Error Rate of signal-to-noise ratio and actual time window A kind of implementation flow chart of indicating value；

Fig. 3 is that the Block Error Rate provided by the embodiments of the present application based on estimated signal-to-noise ratio and actual time window determines letter A kind of implementation flow chart of road quality indicated value value range；

Fig. 4 is a kind of implementation flow chart of the method for modulating-coding provided by the embodiments of the present application；

Fig. 5 is that the channel quality indicated value that foundation provided by the embodiments of the present application receives determines the one of modulating-coding format Kind implementation flow chart；

Fig. 6 becomes for the handling capacity variation of frequency-hopping system under the different signal-to-noise ratio of noiseless situation provided by the embodiments of the present application Gesture figure；

When Fig. 7 is that the frequency point of different proportion provided by the embodiments of the present application is interfered, the frequency hopping system under different signal-to-noise ratio The handling capacity trend chart of system；

When Fig. 8 is that the frequency point of different proportion provided by the embodiments of the present application is interfered, the frequency hopping system under different signal-to-noise ratio The bit error rate trend chart of system；

When Fig. 9 is that the frequency point of different proportion provided by the embodiments of the present application is interfered, the handling capacity variation of frequency-hopping system Tendency chart；

When Figure 10 is that the frequency point of different proportion provided by the embodiments of the present application is interfered, the bit error rate variation of frequency-hopping system Tendency chart；

Figure 11 is a kind of structural schematic diagram that channel quality provided by the embodiments of the present application indicates selection device；

Figure 12 is a kind of structural schematic diagram of modulating-coding device provided by the embodiments of the present application.

Specification and claims and term " first " in above-mentioned attached drawing, " second ", " third " " the 4th " etc. (if In the presence of) it is part for distinguishing similar, without being used to describe a particular order or precedence order.It should be understood that using in this way Data be interchangeable under appropriate circumstances, so that embodiments herein described herein can be in addition to illustrating herein Sequence in addition is implemented.

Specific embodiment

Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, those of ordinary skill in the art are obtained every other under that premise of not paying creative labor Embodiment shall fall within the protection scope of the present invention.

Channel quality indicator (CQI) selection method provided in an embodiment of the present invention and device are applied to the second communication equipment, the One communication equipment can be communicated with the second communication equipment.

Referring to Fig. 1, Fig. 1 is a kind of implementation process that channel quality provided by the embodiments of the present application indicates selection method Scheme, may include:

Step S11: signal-to-noise ratio is estimated according to signal is received, and counts the Block Error Rate of actual time window；Wherein receive letter It number is sent by the first communication equipment for being communicated with the second communication equipment；

During first communication equipment is communicated with the second communication equipment, the first communication equipment according to business demand to Second communication equipment sends the signal after modulating-coding.

When needing to send useful data, the first communication equipment side can carry out the school CRC to the useful data to be sent first It tests, i.e. generation CRC check data, useful data carries out channel coding, constellation modulation after CRC check data are added, by upper It states and is inserted into frequency pilot sign in the data symbol (i.e. code block) of operation, so that form structure of time slot (can hold in a structure of time slot A code block is carried, multiple code blocks can also be carried, the bearing capacitys, code block for how much depending on structure of time slot can be specifically carried The factors such as size, code rate), then, the operation such as frequency conversion, amplification is carried out after molding filtration is handled, is emitted finally by antenna It goes out.Wherein, specific code rate and modulation system are combined into a kind of modulating-coding format MCS, for convenience handle, can be right Modulating-coding format is numbered, in general, coded format processed number is smaller, generally corresponds to lower code rate and/or lower tune The combination of mode processed, same information source length can choose a variety of MCS to send.

In the embodiment of the present invention, the second communication equipment is after the signal for receiving the transmission of the first communication equipment, to receiving Signal (i.e. baseband signal) accepted filter after, carry out time synchronization, then, by the frequency pilot sign and data symbol of signal Separation.Wherein, data symbol is sent into signal detection module, and frequency pilot sign is sent into channel estimation module.

Channel estimation module carries out channel estimation using frequency pilot sign, obtains original time domain channel (abbreviation original channel) and estimates After meter, noise power estimation is carried out, using noise power estimation value, noise reduction is carried out to the original channel that estimation obtains, is dropped Estimation channel after making an uproar estimates the power of useful signal according to the estimation channel after noise reduction, is obtained with estimation useful The power of signal obtains the estimated value of signal-to-noise ratio divided by noise power estimation value.If there are multiple pilot tones in a time slot, can be obtained The average value of the estimated value of multiple signal-to-noise ratio in one time slot can be determined as the letter of the time slot by multiple signal-to-noise ratio (SNR) estimation values It makes an uproar the estimated value of ratio；In the embodiment of the present invention, the signal received is analyzed and processed by preset time window, this is preset Time window at least may include a time slot, if the preset time window includes two or more time slots, The average value of the estimated value of the signal-to-noise ratio of each time slot in one time window is determined as to the signal-to-noise ratio of a time window Estimated value.A specific time window includes that several time slots can be determined according to specific communication system and its application environment.

The channel that signal detection module is estimated using channel estimation module carries out balanced and solves constellation mapping to data symbol The estimated value of useful data and the estimated value of CRC check data are obtained, then by the estimated value of useful data and CRC check data Estimated value be sent into channel decoder decoded, to complete channel decoding after recovery data portion recalculate CRC check The CRC check data recalculated are compared data with the CRC check data for completing to restore after channel decoding, if Comparison result is consistent, it is determined that the corresponding code block of CRC check data is correct, if comparison result is inconsistent, it is determined that the school CRC The corresponding code block error of data is tested, the quantity of the code block of mistake and total in the time window will occur in a time window The ratio of code block quantity is determined as the block error rate BLER of the time window.

Step S12: channel quality indicated value is selected based on the Block Error Rate of signal-to-noise ratio and actual time window.

Channel quality provided in an embodiment of the present invention indicates selection method, comprehensively considers signal-to-noise ratio and Block Error Rate selection channel Quality indicated value, what the instruction of selected channel quality can preferably react channel is disturbed situation, so that signal is sent out Sending end can select more suitable modulating-coding format, thereby may be ensured that and interfering after receiving channel quality indicated value In the case of obtain higher channel capacity and ensure link connection.

Optionally, a kind of realization stream based on the Block Error Rate of signal-to-noise ratio and actual time window selection channel quality indicated value Journey figure is as shown in Fig. 2, may include:

Step S21: determine that channel quality indicated value takes based on the Block Error Rate of estimated signal-to-noise ratio and actual time window It is worth range；

In the embodiment of the present invention, identified channel quality indicated value value range is by several channel quality indicated value groups At.

The Block Error Rate of actual time window is different, and the value range of identified channel quality indicated value may be different.

Step S22: channel quality indicated value is selected from identified channel quality indicated value value range.

It is specifically as follows, according to the Block Error Rate of actual time window, the measurement of the channel quality instruction of actual time window It is worth, and the corresponding channel quality indicated value of modulating-coding format that the signal being currently received uses, from identified channel Channel quality indicated value is selected in quality indicated value value range.

Optionally, channel quality indicated value value is determined based on the Block Error Rate of estimated signal-to-noise ratio and actual time window A kind of implementation flow chart of range is as shown in figure 3, may include:

Step S31: based on estimated signal-to-noise ratio and pre-stored nothing corresponding with each channel quality indicated value Block Error Rate-signal-to-noise ratio curve when interference, Block Error Rate when determining corresponding with each channel quality indicated value noiseless；

In the embodiment of the present invention, different channel quality indicated values corresponds to different Block Error Rates-signal-to-noise ratio curve, accidentally block Rate-signal-to-noise ratio curve embodies the variation relation of Block Error Rate and signal-to-noise ratio.All values of CQI be all it is known, for each CQI value can determine Block Error Rate corresponding with the CQI value by Block Error Rate corresponding with the CQI value-signal-to-noise ratio curve.

Step S32: from channel quality indicated value corresponding with the Block Error Rate for meeting error block rate requirement, maximum letter is determined Road quality indicated value is the measured value that the channel quality of actual time window indicates；

Meet error block rate requirement and refers to that the value of Block Error Rate meets preset condition.

In the embodiment of the present invention, corresponding Block Error Rate is selected to meet the CQI value collection of error block rate requirement from all CQI values It closes, the measurement that the channel quality that maximum channel quality indicated value is actual time window indicates is determined from the CQI value set Value.

Step S33: the Block Error Rate based on actual time window determines rollback corresponding with the Block Error Rate of actual time window Channel quality indicated value, the corresponding letter of modulating-coding format that backoff channel quality indicated value is used with the signal being currently received Rollback preset value determines based on road quality indicated value；

The corresponding preset value of different Block Error Rates may be different.

In the embodiment of the present invention, the execution sequence of step S31 and step S33 is not specifically limited, and can first carry out step S31, then step S33 is executed, alternatively, first carrying out step S33, then step S31 is executed, alternatively, step S31 and step S33 are simultaneously It executes.

Step S34: it determines channel quality indicated value value range, includes: in the channel quality indicated value value range The minimum value CQI of channel quality indicated value_min, the corresponding channel quality of modulating-coding format that the signal being currently received uses Indicated value CQI_MCS, the measured value CQI of the channel quality instruction of actual time window_measureAnd identified backoff channel matter Measure indicated value CQI_backoff。

Optionally, based on the Block Error Rate of actual time window, rollback corresponding with the Block Error Rate of actual time window is determined A kind of implementation of channel quality indicated value can be with are as follows:

If the Block Error Rate of actual time window is less than or equal to the first preset threshold, the Block Error Rate with actual time window Corresponding backoff channel quality indicated value CQI_backoffAre as follows: the corresponding letter of modulating-coding format that the signal being currently received uses Road quality indicated value CQI_MCSWith the first preset value D₁Difference；

It can be indicated with formula are as follows: CQI_backoff=CQI_MCS-D₁。

The signal that the signal being currently received i.e. actual time window finally receives.

If the Block Error Rate of actual time window is greater than the first preset threshold and less than the second preset threshold, with current time The corresponding backoff channel quality indicated value CQI of the Block Error Rate of window_backoffAre as follows: the modulating-coding that the signal being currently received uses The corresponding channel quality indicated value CQI of format_MCSWith the second preset value D₂Difference；

It can be indicated with formula are as follows: CQI_backoff=CQI_MCS-D₂。

If the Block Error Rate of actual time window is greater than the second preset threshold, corresponding with the Block Error Rate of actual time window Backoff channel quality indicated value CQI_backoffAre as follows: the corresponding channel quality of modulating-coding format that the signal being currently received uses Indicated value CQI_MCSWith third preset value D₃Difference；

It can be indicated with formula are as follows: CQI_backoff=CQI_MCS-D₃。

Wherein, the first preset threshold is less than the second preset threshold；First preset value is less than the second preset value, the second preset value Less than third preset value.

For example, the first preset threshold can be 0.1, the second preset threshold can be 0.9, and the first preset value can be 1, the Two preset values can be 2, and third preset value can be 3

Optionally, a kind of implementation of channel quality indicated value is selected from identified channel quality indicated value range It can be with are as follows:

If the Block Error Rate of actual time window is zero, judge that current time slots are apart from the time interval of upper one error time slot It is no in effective time interval, if so, selecting the letter being currently received from determined channel quality indicated value value range Number corresponding channel quality indicated value CQI of the modulating-coding format used_MCS；If it is not, then being taken from determined channel quality indicated value It is worth the measured value CQI that the channel quality instruction of actual time window is selected in range_measure；

The time slot finally received in current time slots, that is, actual time window.

When the Block Error Rate of actual time window is zero, if (there is mistake apart from upper error time slot in current time slots The time slot of code block) time interval in effective time interval, then the modulating-coding format that uses the signal being currently received Corresponding channel quality indicated value feeds back to signal sending end, i.e. the first communication equipment as CQI feedback value；If current time slots away from The time interval of from upper one error time slot then indicates the channel quality of actual time window not in effective time interval Measured value feeds back to signal sending end as CQI feedback value.

If the Block Error Rate of actual time window is not zero, compare the measured value pair of the channel quality instruction of actual time window The corresponding channel quality indicated value corresponding of the modulating-coding format that the first efficiency answered is used with the signal being currently received Two efficiency, if the first efficiency selects channel quality indicated value: CQI less than the second efficiency, according to following selection formula_select=max {CQI_min,min{CQI_measure,CQI_backoff}}；If the first efficiency is greater than the second efficiency, channel is selected according to following selection formula Quality indicated value: CQI_select=max { CQI_min,CQI_backoff}；

Wherein, CQI_selectFor selected channel quality indicated value, CQI_minFor the minimum value of channel quality indicated value, CQI_measureFor the measured value that the channel quality of actual time window indicates, CQI_backoffFor the Block Error Rate with actual time window Corresponding backoff channel quality indicated value.

CQI value is combination of the signal receiving end to the instruction of channel quality and code rate and modulation system, CQI value definition It can be defined with MCS value consistent or inconsistent.

If CQI value and MCS value define it is inconsistent, for the ease of being compared, can by channel quality indicator (CQI) value and MCS value is converted to efficiency, wherein the corresponding efficiency of CQI value refers to: the bit of the every symbols carry of CQI value corresponding modulating mode The product of number code rate corresponding with CQI value；The corresponding efficiency of MCS value refers to: the every symbols carry of MCS value corresponding modulating mode The product of the number of bit code rate corresponding with MCS value.Due in pair according to channel quality indicated value and modulating-coding format When should be related to determining modulating-coding format corresponding with channel quality indicated value, it is to be converted according to efficiency, i.e., converts MCS value For the immediate CQI value of efficiency.Therefore, it can be compared by efficiency and determine channel quality instruction selection formula.

If CQI value is consistent with the definition of MCS value, can directly with the CQI value of actual time window and be currently received The MCS value that uses of signal be compared, i.e., the first efficiency is characterized with the CQI value of actual time window, with being currently received The MCS value that uses of signal characterize the second efficiency.

In general, channel quality indicated value is numbered from 0, and such as 0,1,2,3,4 ... ..., it is based on this, channel quality indicated value Minimum value be 0.

When the first efficiency is equal to the second efficiency, any one selection formula can be selected from above-mentioned two selection formula Select channel quality instruction.

Optionally, the embodiment of the present invention also provides a kind of adaptive modulation coding method, it is provided in an embodiment of the present invention from It adapts to modulation coding method and device is applied to the first communication equipment, adaptive modulation coding method provided in an embodiment of the present invention A kind of implementation flow chart as shown in figure 4, may include:

Step S41: by feedback channel receive with the first communication equipment communicated the second communication equipment transmission Channel quality indicated value CQI, channel quality indicated value estimates signal-to-noise ratio according to signal is received by the second communication equipment, and counts pre- Set the Block Error Rate of time window；It is determined based on the selection of the Block Error Rate of estimated signal-to-noise ratio and the preset time window counted；

Specific second communication equipment selects the process for determining channel quality indicated value to may refer to the instruction of aforementioned channels quality The embodiment of selection method, which is not described herein again.

Step S42: modulating-coding format is determined according to the channel quality indicated value received；

Step S43: coding is modulated to sent signal based on identified modulating-coding format.

Modulation coding method provided in an embodiment of the present invention, user determine that the channel quality of adjustment coded format indicates synthesis Signal-to-noise ratio and Block Error Rate are considered, can preferably react channel is disturbed situation, so that signal sending end (i.e. first Communication equipment) after receiving channel quality indicated value, more suitable modulating-coding format can be selected, thereby may be ensured that Link connection under disturbed condition.

Optionally, determine a kind of implementation flow chart of modulating-coding format as schemed according to the channel quality indicated value received Shown in 5, may include:

Step S51: determine the type of business that currently carries of the first communication equipment；

The type for the business that the first communication equipment currently carries can be determined according to preconfigured type of service parameter.

The business that specific first communication equipment can carry belongs to any type of service and can be divided in advance by technical staff With determination.

Step S52: determine that modulation corresponding with identified type of service is compiled according to the channel quality indicated value received Code format.

In the embodiment of the present invention, signal sending end (i.e. the first communication equipment) is after receiving channel quality indicated value, knot It closes and considers that service feature and the channel quality indicated value received determine more suitable modulating-coding format, to further protect It demonstrate,proves link connection in an interference situation and obtains higher channel capacity.

Optionally, the business that the first communication equipment currently carries may include: the business of type of doing one's best, to reliability Demanding business needs to keep constant the business of rate link.

If the business that the first communication equipment currently carries is the business of type of doing one's best, this kind of business is usually required as early as possible Complete transmission and it is not high to reliability requirement, can be according to pair of predetermined channel quality indicated value and modulating-coding format It should be related to, determine that modulating-coding format corresponding with received channel quality indicated value is and identified type of service pair The modulating-coding format answered.

If the business that the first communication equipment currently carries is the business high to reliability requirement, with reference to the channel matter received Indicated value is measured, and considers the bit number that next time slot can carry, using less than or equal to the channel quality indicated value received It determines modulating-coding format, and uses alap modulating-coding format.Specifically,

If the business that the first communication equipment currently carries is the business high to reliability requirement, based on received channel Quality indicated value calculates the bit number that next time slot can carry；

If being less than institute based on the bit number that next time slot that received channel quality indicated value is calculated can carry The bit number for stating the business that the first communication equipment currently carries illustrates that next time slot cannot carry the bit of current business completely Number, then be current business application time interval resource, and modulating-coding lattice corresponding with identified type of service are obtained by calculation Formula, even next time slot cannot carry the bit number of current business completely, then need to apply more multi-slot, and using receiving Channel quality indicates to determine modulating-coding format.

That is, if the bit that can be carried based on next time slot that received channel quality indicated value is calculated Number is greater than the bit number for the business that the first communication equipment currently carries, then alternately by the channel quality indicated value received Value, and calculate channel based on the channel quality indicated value received and 1 difference next time slot for being calculated and can carry Bit number, if the channel based on the channel quality indicated value received and 1 difference next time slot for being calculated can carry Bit number less than the business that the first communication equipment currently carries bit number, then using the channel quality indicated value received as mesh Mark channel quality indicated value, if the channel based on the channel quality indicated value received and 1 lower a period of time for being calculated of difference The bit number that gap can carry is greater than or equal to the bit number for the business that the first communication equipment currently carries, the then channel that will be received The channel of quality indicated value is alternately worth with 1 difference, and calculates the channel and 2 based on the channel quality indicated value received The bit number that can carry of next time slot for being calculated of difference, if the channel based on the channel quality indicated value received and 2 The bit number that can carry of next time slot for being calculated of difference be greater than or equal to business that the first communication equipment currently carries The channel of the channel quality indicated value received is then alternately worth by bit number with 2 difference, and calculates based on receiving The bit number that next time slot that the channel of channel quality indicated value and 3 differences are calculated can carry, if based on the letter received The bit number that the channel of road quality indicated value can be carried with next time slot that 2 difference is calculated is worked as less than the first communication equipment The bit number of the business of preceding carrying, then using the channel of the channel quality indicated value received and 1 difference as destination channel matter Measure indicated value.

If the business that the first communication equipment currently carries is to need to keep constant the business of rate link, with reference to what is received Channel quality indicated value, and the bit number that next time slot can carry is calculated according to the channel quality indicated value that this is received, such as Fruit calculates the bit number that next time slot can carry according to the channel quality indicated value that this is received and is greater than or equal to the first communication The bit number for the business that equipment currently carries, then it is corresponding with modulating-coding format according to predetermined channel quality indicated value Relationship determines that modulating-coding format corresponding with received channel quality indicated value is corresponding with identified type of service Modulating-coding format；If the bit number that calculating next time slot according to the channel quality indicated value that this is received can carry is less than The bit number for the business that first communication equipment currently carries then applies for time interval resource, and determines that currently used channel quality refers to The corresponding modulating-coding format of indicating value is modulating-coding format corresponding with identified type of service.Specifically,

If the business that the first communication equipment currently carries is to need to keep constant the business of rate link, based on received Channel quality indicated value calculate the bit number that next time slot can carry；

The embodiment of the present invention is illustrated below with reference to simulation result.

Table 1 is that CQI value provided in an embodiment of the present invention defines table, and table 2 is the system design parameters used in emulation.This In emulation, CQI value definition is consistent with MCS value definition.

Table 1

Table 2

Slot length	3.2ms
		Character rate	3.84Msps
One time slot burst number	12
		Wireless channel	Additive white Gaussian noise awgn channel
Interference type	Part frequency hopping frequency point is blocked interference
		Interference strength	Signal interference ratio -10dB
Frequency point interferes ratio	17%, 33%, 50%, 58%

2 intermediate-frequeney point of table interference ratio refers to how many frequency point is interfered in frequency-hopping system.

Referring to Fig. 6, Fig. 6 be it is provided in an embodiment of the present invention emulated based on Tables 1 and 2 parameter it is noiseless The handling capacity trend chart of frequency-hopping system under the different signal-to-noise ratio of situation.

Referring to Fig. 7, Fig. 7 be it is provided in an embodiment of the present invention, when the frequency point of different proportion is interfered, in different noises Than the handling capacity trend chart of lower frequency-hopping system.

Referring to Fig. 8, Fig. 8 be it is provided in an embodiment of the present invention, when the frequency point of different proportion is interfered, in different noises Than the bit error rate trend chart of lower frequency-hopping system.

Referring to Fig. 9, Fig. 9 be it is provided in an embodiment of the present invention, when the frequency point of different proportion is interfered, frequency-hopping system Handling capacity trend chart.

Referring to Fig. 10, Figure 10 be it is provided in an embodiment of the present invention, when the frequency point of different proportion is interfered, frequency-hopping system Bit error rate trend chart.

As it can be seen that the method for the channel quality instruction selection method and modulating-coding that provide through the embodiment of the present invention, is having In the case where interference, with the increase of signal-to-noise ratio, the handling capacity of frequency-hopping system also increases, and the bit error rate reduces, and ensure that link It is stably connected with.

Corresponding with embodiment of the method, the embodiment of the present invention also provides a kind of channel quality instruction selection device, the present invention A kind of structural schematic diagram for the channel quality instruction selection device that embodiment provides is as shown in figure 11, may include:

Processing module 111 and selecting module 112；Wherein,

Processing module for estimating signal-to-noise ratio according to reception signal, and counts the Block Error Rate of actual time window；Receive letter It number is sent by the first communication equipment for being communicated with the second communication equipment；

Selecting module selects channel for the Block Error Rate based on estimated signal-to-noise ratio and the actual time window counted Quality indicated value.

Channel quality provided in an embodiment of the present invention indicates selection device, comprehensively considers signal-to-noise ratio and Block Error Rate selection channel Quality indicated value, what the instruction of selected channel quality can preferably react channel is disturbed situation, so that signal is sent out Sending end can select more suitable modulating-coding format, thereby may be ensured that and interfering after receiving channel quality indicated value In the case of link connection.

Optionally, selecting module may include:

Submodule is determined, for determining channel quality indicated value value based on the Block Error Rate of signal-to-noise ratio and actual time window Range；

Optionally, determine that submodule may include:

First determination unit, for based on signal-to-noise ratio and pre-stored corresponding with each channel quality indicated value Block Error Rate-signal-to-noise ratio curve when noiseless, Block Error Rate when determining corresponding with each channel quality indicated value noiseless；

Second determination unit, for being determined from channel quality indicated value corresponding with the Block Error Rate for meeting error block rate requirement Maximum channel quality indicated value is the measured value that the channel quality of actual time window indicates；

Third determination unit, for the Block Error Rate based on actual time window, the determining Block Error Rate with actual time window Corresponding backoff channel quality indicated value, the modulating-coding lattice that backoff channel quality indicated value is used with the signal being currently received Rollback preset value determines based on the corresponding channel quality indicated value of formula；

4th determination unit, for determining channel quality indicated value value range, in channel quality indicated value value range It include: the minimum value CQI of channel quality indicated value_min, the corresponding channel of modulating-coding format that the signal being currently received uses Quality indicated value CQI_MCS, the measured value CQI of the channel quality instruction of actual time window_measure, and and actual time window The corresponding backoff channel quality indicated value CQI of Block Error Rate_backoff。

Optionally, third determination unit specifically can be used for,

If the Block Error Rate of actual time window is less than or equal to the first preset threshold, the Block Error Rate with actual time window Corresponding backoff channel quality indicated value CQI_backoffAre as follows: the corresponding letter of modulating-coding format that the signal being currently received uses Road quality indicated value CQI_MCSWith the difference of the first preset value；

If the Block Error Rate of actual time window is greater than the first preset threshold and less than the second preset threshold, with current time The corresponding backoff channel quality indicated value CQI of the Block Error Rate of window_backoffAre as follows: the modulating-coding that the signal being currently received uses The corresponding channel quality indicated value CQI of format_MCSWith the difference of the second preset value；

If the Block Error Rate of actual time window is greater than the second preset threshold, corresponding with the Block Error Rate of actual time window Backoff channel quality indicated value CQI_backoffAre as follows: the corresponding channel quality of modulating-coding format that the signal being currently received uses Indicated value CQI_MCSWith the difference of third preset value；

Optionally, selection submodule specifically can be used for,

If the Block Error Rate of actual time window is not zero, compare the measured value pair of the channel quality instruction of actual time window The corresponding channel quality indicated value corresponding of the modulating-coding format that the first efficiency answered is used with the signal being currently received Two efficiency, if the first efficiency selects channel quality indicated value: CQI less than the second efficiency, according to following selection formula_select=max {CQI_min,min{CQI_measure,CQI_backoff}}；If the first efficiency is greater than second efficiency, according to following selection formula selection Channel quality indicated value: CQI_select=max { CQI_min,CQI_backoff}；

Wherein, CQI_selectFor selected channel quality indicated value.

Corresponding with modulation coding method, the embodiment of the present invention also provides a kind of Adaptive Modulation and Coding device, the present invention A kind of structural schematic diagram for the modulating-coding device that embodiment provides is as shown in figure 12, may include:

Receiving module 121, for receiving the communicated with first communication equipment second communication by feedback channel The channel quality indicated value that equipment is sent, channel quality indicated value estimate signal-to-noise ratio according to signal is received by the second communication equipment, And count the Block Error Rate of preset time window；Block Error Rate choosing based on estimated signal-to-noise ratio and the preset time window counted Select determination；

Determining module 122, for determining modulating-coding format according to the channel quality indicated value received；

Modulating-coding module 123, for being modulated coding to sent signal based on determining modulating-coding format.

Optionally, determining module may include:

First determines submodule, for determining the type of business that the first communication equipment currently carries；

Optionally, second determine that submodule may include:

First determination unit, if being the business of type of doing one's best for the business that the first communication equipment currently carries, according to It determines according to the corresponding relationship of predetermined channel quality indicated value and modulating-coding format and refers to received channel quality The corresponding modulating-coding format of indicating value is modulating-coding format corresponding with identified type of service.

Optionally, second determine that submodule may include:

First computing unit, if being the business high to reliability requirement for the business that the first communication equipment currently carries, The bit number that next time slot can carry is calculated based on received channel quality indicated value；

Second computing unit, if for that can be held based on next time slot that received channel quality indicated value is calculated The bit number of load is calculated and identified type of service pair less than the bit number for the business that the first communication equipment currently carries The modulating-coding format answered；

Second determination unit, if for that can be held based on next time slot that received channel quality indicated value is calculated The bit number of load is greater than the bit number for the business that the first communication equipment currently carries, and is upper with the channel quality indicated value received Limit, since received channel quality indicated value, successively calculating next time slot corresponding with channel quality indicated value can be held The bit number of load determines that bit number that next time slot can carry is greater than the ratio for the business that first communication equipment currently carries Minimum channel quality indicated value when special number is target channel quality indicated value, according to predetermined channel quality indicated value with The corresponding relationship of modulating-coding format determine modulating-coding format corresponding with target channel quality indicated value for it is identified The corresponding modulating-coding format of type of service.

Optionally, second determine that submodule may include:

Third computing unit, if being to need to keep constant what rate linked for the business that the first communication equipment currently carries Business calculates the bit number that next time slot can carry based on received channel quality indicated value；

4th computing unit, if for that can be held based on next time slot that received channel quality indicated value is calculated The bit number of load less than the business that the first communication equipment currently carries bit number, according to predetermined channel quality indicated value And the corresponding relationship of modulating-coding format determine modulating-coding format corresponding with received channel quality indicated value for The corresponding modulating-coding format of identified type of service；

4th determination unit, if for that can be held based on next time slot that received channel quality indicated value is calculated The bit number of load is greater than the bit number for the business that first communication equipment currently carries, and refers to according to predetermined channel quality The corresponding relationship of indicating value and modulating-coding format determines modulating-coding format corresponding with received channel quality indicated value For modulating-coding format corresponding with identified type of service, and the business and other business that the first communication equipment currently carries It is multiplexed the same time slot.

Those of ordinary skill in the art may be aware that list described in conjunction with the examples disclosed in the embodiments of the present disclosure Member and algorithm steps can be realized with the combination of electronic hardware or computer software and electronic hardware.These functions are actually It is implemented in hardware or software, the specific application and design constraint depending on technical solution.Professional technician Each specific application can be used different methods to achieve the described function, but this realization is it is not considered that exceed The scope of the present invention.

It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description The specific work process of (if present), device and unit, can refer to corresponding processes in the foregoing method embodiment, herein no longer It repeats.

In several embodiments provided herein, it should be understood that disclosed system (if present), device and side Method may be implemented in other ways.For example, the apparatus embodiments described above are merely exemplary, for example, described The division of unit, only a kind of logical function partition, there may be another division manner in actual implementation, such as multiple units Or component can be combined or can be integrated into another system, or some features can be ignored or not executed.Another point, institute Display or the mutual coupling, direct-coupling or communication connection discussed can be through some interfaces, device or unit Indirect coupling or communication connection can be electrical property, mechanical or other forms.

The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple In network unit.It can select some or all of unit therein according to the actual needs to realize the mesh of this embodiment scheme 's.

It, can also be in addition, the functional units in various embodiments of the present invention may be integrated into one processing unit It is that each unit physically exists alone, can also be integrated in one unit with two or more units.

It, can be with if the function is realized in the form of SFU software functional unit and when sold or used as an independent product It is stored in a computer readable storage medium.Based on this understanding, technical solution of the present invention is substantially in other words The part of the part that contributes to existing technology or the technical solution can be embodied in the form of software products, the meter Calculation machine software product is stored in a storage medium, including some instructions are used so that a computer equipment (can be a People's computer, server or network equipment etc.) it performs all or part of the steps of the method described in the various embodiments of the present invention. And storage medium above-mentioned includes: that USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), arbitrary access are deposited The various media that can store program code such as reservoir (RAM, Random Access Memory), magnetic or disk.

The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one The widest scope of cause.

Claims

1. a kind of channel quality indicates selection method, it is applied to the second communication equipment characterized by comprising

The signal-to-noise ratio of actual time window is estimated according to signal is received, and counts the Block Error Rate of the actual time window；It is described Signal is received to be sent by the first communication equipment communicated with second communication equipment；

Based on the signal-to-noise ratio and it is pre-stored corresponding with each channel quality indicated value noiseless when Block Error Rate- Signal-to-noise ratio curve, Block Error Rate when determining corresponding with each channel quality indicated value noiseless；

From channel quality indicated value corresponding with the Block Error Rate for meeting error block rate requirement, maximum channel quality indicated value is determined The measured value indicated for the channel quality of actual time window；The error block rate requirement that meets refers to that the value of Block Error Rate meets in advance If condition；

Based on the Block Error Rate of the actual time window, backoff channel corresponding with the Block Error Rate of the actual time window is determined Quality indicated value, the corresponding letter of modulating-coding format that the backoff channel quality indicated value is used with the signal being currently received Rollback preset value determines based on road quality indicated value；

It determines channel quality indicated value value range, includes: channel quality instruction in the channel quality indicated value value range The minimum value CQI of value_min, the corresponding channel quality indicated value CQI of the modulating-coding format that the signal being currently received uses_MCS, The measured value CQI of the channel quality instruction of the actual time window_measureAnd described and actual time window mistake The corresponding backoff channel quality indicated value CQI of block rate_backoff；

2. the method according to claim 1, wherein the Block Error Rate based on the actual time window, really Determining backoff channel quality indicated value corresponding with the Block Error Rate of the actual time window includes:

If the Block Error Rate of the actual time window is less than or equal to the first preset threshold, the mistake with the actual time window The corresponding backoff channel quality indicated value CQI of block rate_backoffAre as follows: the modulating-coding format that the signal being currently received uses is corresponding Channel quality indicated value CQI_MCSWith the difference of the first preset value；

It is and described if the Block Error Rate of the actual time window is greater than first preset threshold and less than the second preset threshold The corresponding backoff channel quality indicated value CQI of the Block Error Rate of actual time window_backoffAre as follows: what the signal being currently received used The corresponding channel quality indicated value CQI of modulating-coding format_MCSWith the difference of the second preset value；

If the Block Error Rate of the actual time window is greater than second preset threshold, the mistake block with the actual time window The corresponding backoff channel quality indicated value CQI of rate_backoffAre as follows: the modulating-coding format that the signal being currently received uses is corresponding Channel quality indicated value CQI_MCSWith the difference of third preset value；

Wherein, first preset threshold is less than second preset threshold；It is default that first preset value is less than described second Value, second preset value are less than the third preset value.

3. the method according to claim 1, wherein described from identified channel quality indicated value value range Middle selection channel quality indicated value includes:

If the Block Error Rate of the actual time window is zero, judge that current time slots are apart from the time interval of upper one error time slot It is no in effective time interval, if so, from determined channel quality indicated value value range selection described in be currently received The corresponding channel quality indicated value CQI of modulating-coding format that uses of signal_MCS；If it is not, then being indicated from determined channel quality The measured value CQI for selecting the channel quality of the actual time window to indicate in value value range_measure；

If the Block Error Rate of the actual time window is not zero, the measurement of the channel quality instruction of the actual time window The channel quality indicated value corresponding with the modulating-coding format that the signal being currently received uses that is worth corresponding first efficiency Corresponding second efficiency refers to if first efficiency is less than second efficiency according to following selection formula selection channel quality Indicating value: CQI_Select=max{CQI_min,min{CQI_measure,CQI_backoff}}_；If first efficiency is greater than second efficiency, according to Channel quality indicated value: CQI is selected according to following selection formula_select=max { CQI_min,CQI_backoff}；

Wherein, CQI_selectFor selected channel quality indicated value.

4. a kind of adaptive modulation coding method is applied to the first communication equipment characterized by comprising

The channel quality that the second communication equipment communicated with first communication equipment is sent is received by feedback channel to refer to Indicating value, the channel quality indicated value is by second communication equipment according to the noise for receiving signal estimation preset time window Than, and count the Block Error Rate of the preset time window；It is selected based on the Block Error Rate of the signal-to-noise ratio and the preset time window Select determination；

Modulating-coding format based on the determination is modulated coding to sent signal；

Wherein, it selects to determine that channel quality indicated value includes: based on the Block Error Rate of the signal-to-noise ratio and the preset time window

5. according to the method described in claim 4, it is characterized in that, the channel quality indicated value that the foundation receives is determined and is adjusted Coded format processed includes:

6. according to the method described in claim 5, it is characterized in that, the channel quality indicated value that receives of the foundation determine with The corresponding modulating-coding format of identified type of service includes:

If the business that first communication equipment currently carries is the business of type of doing one's best, according to predetermined channel matter The corresponding relationship for measuring indicated value and modulating-coding format determines modulating-coding corresponding with received channel quality indicated value Format is modulating-coding format corresponding with identified type of service.

7. according to the method described in claim 5, it is characterized in that, the channel quality indicated value that receives of the foundation determine with The corresponding modulating-coding format of identified type of service includes:

If the bit number that can be carried based on next time slot that received channel quality indicated value is calculated is less than described the Modulating-coding lattice corresponding with identified type of service are calculated in the bit number for the business that one communication equipment currently carries Formula；

If the bit number that can be carried based on next time slot that received channel quality indicated value is calculated is greater than described the The bit number for the business that one communication equipment currently carries, using the channel quality indicated value received as the upper limit, from received Channel quality indicated value starts, and successively calculates the bit number that next time slot corresponding with channel quality indicated value can carry, determines The bit number that next time slot can carry is greater than the minimum letter when bit number for the business that first communication equipment currently carries Road quality indicated value is target channel quality indicated value, according to predetermined channel quality indicated value and modulating-coding format Corresponding relationship determines that modulating-coding format corresponding with the target channel quality indicated value is and identified type of service pair The modulating-coding format answered.

8. according to the method described in claim 5, it is characterized in that, the channel quality indicated value that receives of the foundation determine with The corresponding modulating-coding format of identified type of service includes:

If the business that first communication equipment currently carries is to need to keep constant the business of rate link, based on received Channel quality indicated value calculate the bit number that next time slot can carry；

If the bit number that can be carried based on next time slot that received channel quality indicated value is calculated is less than described the The bit number for the business that one communication equipment currently carries, according to predetermined channel quality indicated value and modulating-coding format Corresponding relationship determines that modulating-coding format corresponding with received channel quality indicated value is and identified type of service Corresponding modulating-coding format；

If the bit number that can be carried based on next time slot that received channel quality indicated value is calculated is equal to described the The bit number for the business that one communication equipment currently carries, according to predetermined channel quality indicated value and modulating-coding format Corresponding relationship determines that modulating-coding format corresponding with received channel quality indicated value is and identified type of service Corresponding modulating-coding format；

If the bit number that can be carried based on next time slot that received channel quality indicated value is calculated is greater than described the The bit number for the business that one communication equipment currently carries, according to predetermined channel quality indicated value and modulating-coding format Corresponding relationship determines that modulating-coding format corresponding with received channel quality indicated value is and identified type of service Corresponding modulating-coding format, and the business that currently carries of first communication equipment and the same time slot of other service integrations.

9. a kind of channel quality indicates selection device, it is applied to the second communication equipment characterized by comprising

Processing module for the signal-to-noise ratio according to reception signal estimation actual time window, and counts the actual time window Block Error Rate；The signal that receives is sent by the first communication equipment communicated with second communication equipment；

Selecting module, for selecting channel quality indicated value based on the Block Error Rate of the signal-to-noise ratio and the actual time window, Include:

Submodule is determined, for determining channel quality indicated value based on the Block Error Rate of the signal-to-noise ratio and the actual time window Value range specifically includes: the first determination unit, for based on the signal-to-noise ratio and pre-stored and each channel matter Block Error Rate-signal-to-noise ratio curve when amount indicated value is corresponding noiseless determines that nothing corresponding with each channel quality indicated value is dry Block Error Rate when disturbing；Second determination unit, for from channel quality indicated value corresponding with the Block Error Rate for meeting error block rate requirement The middle maximum channel quality indicated value of determination is the measured value that the channel quality of actual time window indicates；It is described to meet Block Error Rate It is required that referring to that the value of Block Error Rate meets preset condition；Third determination unit, for the mistake block based on the actual time window Rate, determines backoff channel quality indicated value corresponding with the Block Error Rate of the actual time window, and the backoff channel quality refers to Indicating value is retracted preset value based on the corresponding channel quality indicated value of modulating-coding format that the signal being currently received uses It determines；4th determination unit, for determining the channel quality indicated value value range, the channel quality indicated value value model It include: the minimum value CQI of channel quality indicated value in enclosing_min, the modulating-coding format that the signal being currently received uses is corresponding Channel quality indicated value CQI_MCS, the measured value CQI of the channel quality instruction of the actual time window_measureAnd it is described with The corresponding backoff channel quality indicated value CQI of the Block Error Rate of the actual time window_backoff；

10. device according to claim 9, which is characterized in that the third determination unit is specifically used for,

11. device according to claim 9, which is characterized in that the selection submodule is specifically used for,

If the Block Error Rate of the actual time window is not zero, the measurement of the channel quality instruction of the actual time window The channel quality indicated value corresponding with the modulating-coding format that the signal being currently received uses that is worth corresponding first efficiency Corresponding second efficiency refers to if first efficiency is less than second efficiency according to following selection formula selection channel quality Indicating value: CQI_select=max { CQI_min,min{CQI_measure,CQI_backoff}}；If first efficiency is greater than second effect Rate selects channel quality indicated value: CQI according to following selection formula_select=max { CQI_min,CQI_backoff}；

Wherein, CQI_selectFor selected channel quality indicated value.

12. a kind of Adaptive Modulation and Coding device is applied to the first communication equipment characterized by comprising

Receiving module is sent for receiving the second communication equipment communicated with first communication equipment by feedback channel Channel quality indicated value, the channel quality indicated value estimates preset time according to signal is received by second communication equipment The signal-to-noise ratio of window, and count the Block Error Rate of the preset time window；Based on the signal-to-noise ratio and the preset time window Block Error Rate select determine；

Modulating-coding module is modulated coding to sent signal for modulating-coding format based on the determination；

Wherein, second communication equipment selects to determine channel based on the Block Error Rate of the signal-to-noise ratio and the preset time window When quality indicated value, comprising:

13. device according to claim 12, which is characterized in that the determining module includes:

Second determines submodule, for corresponding with identified type of service according to the channel quality indicated value determination received Modulating-coding format.

14. device according to claim 13, which is characterized in that described second determines that submodule includes:

First determination unit, if being the business of type of doing one's best for the business that first communication equipment currently carries, according to It determines according to the corresponding relationship of predetermined channel quality indicated value and modulating-coding format and refers to received channel quality The corresponding modulating-coding format of indicating value is modulating-coding format corresponding with identified type of service.

15. device according to claim 13, which is characterized in that described second determines that submodule includes:

First computing unit, if being the business high to reliability requirement for the business that first communication equipment currently carries, The bit number that next time slot can carry is calculated based on received channel quality indicated value；

Second computing unit, if for that can be carried based on next time slot that received channel quality indicated value is calculated Bit number is less than the bit number for the business that first communication equipment currently carries, and is calculated and identified type of service pair The modulating-coding format answered；

Second determination unit, if for that can be carried based on next time slot that received channel quality indicated value is calculated Bit number is greater than the bit number for the business that first communication equipment currently carries, and is upper with the channel quality indicated value received Limit, since received channel quality indicated value, successively calculating next time slot corresponding with channel quality indicated value can be held The bit number of load determines that bit number that next time slot can carry is greater than the ratio for the business that first communication equipment currently carries Minimum channel quality indicated value when special number is target channel quality indicated value, according to predetermined channel quality indicated value with The corresponding relationship of modulating-coding format determine modulating-coding format corresponding with the target channel quality indicated value for it is true The corresponding modulating-coding format of fixed type of service.

16. device according to claim 13, which is characterized in that described second determines that submodule includes:

Third computing unit, if being to need to keep constant what rate linked for the business that first communication equipment currently carries Business calculates the bit number that next time slot can carry based on received channel quality indicated value；

4th computing unit, if for that can be carried based on next time slot that received channel quality indicated value is calculated Bit number is less than the bit number for the business that first communication equipment currently carries, according to predetermined channel quality indicated value And the corresponding relationship of modulating-coding format determine modulating-coding format corresponding with received channel quality indicated value for The corresponding modulating-coding format of identified type of service；

Third determination unit, if for that can be carried based on next time slot that received channel quality indicated value is calculated Bit number is equal to the bit number for the business that first communication equipment currently carries, according to predetermined channel quality indicated value And the corresponding relationship of modulating-coding format determine modulating-coding format corresponding with received channel quality indicated value for The corresponding modulating-coding format of identified type of service；

4th determination unit, if for that can be carried based on next time slot that received channel quality indicated value is calculated Bit number is greater than the bit number for the business that first communication equipment currently carries, according to predetermined channel quality indicated value And the corresponding relationship of modulating-coding format determine modulating-coding format corresponding with received channel quality indicated value for The corresponding modulating-coding format of identified type of service, and the business and other business that first communication equipment currently carries It is multiplexed the same time slot.