CN110336647A

CN110336647A - A kind of wireless self-networking Adaptive Anti-jamming dispatching method and device

Info

Publication number: CN110336647A
Application number: CN201910751147.7A
Authority: CN
Inventors: 刘佳
Original assignee: Shenzhen Fengyun Technology Co Ltd
Current assignee: Shenzhen Fengyun Technology Co Ltd
Priority date: 2019-08-15
Filing date: 2019-08-15
Publication date: 2019-10-15
Anticipated expiration: 2039-08-15
Also published as: CN110336647B

Abstract

The invention discloses a kind of wireless self-networking Adaptive Anti-jamming dispatching method and devices, are related to channel modulation techniques field, and dispatching method includes: that statistics receives the bit error rate and OFDM subcarrier average received signal-to-noise ratio；According to the bit error rate is received, OFDM subcarrier available signal-to-noise ratio thresholding under each modulation system grade is adjusted；According to the bit error rate and current period modulation system currently in use is received, modulation system is adjusted, and according to OFDM subcarrier average received signal-to-noise ratio, show that available subcarrier maps.The present invention can be according to the Link Channel Quality subcarrier maps that accurate adaptively selected modulation system and wideband OFDM are modulated in real time, under the premise of guaranteeing that transmission is reliable, promotion transmission capacity as much as possible, to promote wireless system resources utilization rate and communication efficient.

Description

A kind of wireless self-networking Adaptive Anti-jamming dispatching method and device

Technical field

The present invention relates to channel modulation techniques fields, and in particular to a kind of wireless self-networking Adaptive Anti-jamming dispatching method And device.

Background technique

Wireless self-networking is a kind of distributed packet radio autonomous networks, and no static infrastructure, node status is reciprocity, Can move freely, topological dynamic change, have the characteristics that networking flexibility, multi-hop relay, it is anti-ruin self-healing, in emergency arrangement, public The scenes such as service, military communication are using more and more extensive.

For wireless channel due to being influenced by factors such as communication distance, electromagnetic interference, Multipath Transmission, node motions, channel is special Property time-varying, channel quality fluctuates, and the high-order modulating and wideband OFDM that channel is supported modulate lower available subcarrier mapping It is also time-varying.

Wireless ad hoc network systems resource mainly includes frequency resource, time resource etc., to make full use of channel resource, is improved The validity of communication system, should be as far as possible with the modulation system of high-order and more OFDM sub-carrier numbers when channel condition is good Amount；For reduction transmission error rates, guarantee the reliability of communication system, low-order-modulated grade should be used in bad channel conditions, and Avoid the OFDM subcarrier using disturbed or multipath fading.It therefore, is the validity and reliability for taking into account communication system, system Matched modulation system grade should be able to be selected according to communication link channel quality, and according to spectral interference and Multipath Transmission situation, Reject disturbed and multipath fading OFDM subcarrier.

The anti-interference dispatching method that modulation system, wideband OFDM modulated sub-carriers map can be divided into manually and automatically two type Not.The scheduling for manually selecting modulation system is usually according to default scene, including communication frequency, communication distance, node motion speed The parameters such as degree, calculate link attenuation and system margin, and fixation selects a kind of modulation system.Manually selecting modulation system advantage is behaviour Make simply, the disadvantage is that inflexible, the availability of frequency spectrum is lower, and communication reliability is poor under time varying channel.

Automatically selecting modulation system, to be also known as modulation system adaptive, is the adaptive real-time selection according to Link Channel Quality Modulation system.Its advantage is that optimal modulation system can be selected according to the real time status of channel, there is preferable validity and can By property.Based on mostly being applied at present in wireless communication system with adaptive modulation system.Adaptive modulation system needs that criterion is arranged Parameter and decision threshold, for wireless communication system mostly using received signal strength as foundation, advantage is to obtain received signal strength at present Simply, the disadvantage is that received signal strength cannot adequately react channel quality sometimes, it is be easy to cause erroneous judgement, causes transmission error code.

Scheduling for the subcarrier maps under OFDM modulation, wireless self-networking communication system mostly uses fixed mapping at present Then mode selects working frequency range, and interference for deducting frequency range carries in the preceding first progress electromagnetic environment scanning of system organization application Wave forms the subcarrier maps of system work, its advantage is that it is easy to operate, the disadvantage is that reliable under the channel condition of interference variations Property is poor, simultaneously for frequency selective fading caused by the multipath effect of time varying channel or node motion, cannot sufficiently identify And decline sub-carrier frequencies are deducted in time, easily cause transmission error code.

Summary of the invention

Therefore, the technical problems to be solved by the invention, first is that wireless self-networking communicates adaptive modulation system criterion item Part cannot be fully accurate reflection channel conditions, so as to cause the defect of transmission error code；It is further wireless self-networking wideband OFDM Under modulation, cannot adaptively selected suitable subcarrier maps defect, manual subcarrier maps are in interference time varying channel or more Under the conditions of diameter frequency selective fading channels, transmission error code is easily caused.

For this purpose, a kind of wireless self-networking Adaptive Anti-jamming dispatching method of the embodiment of the present invention, comprising the following steps:

Statistics receives the bit error rate and OFDM subcarrier average received signal-to-noise ratio；

According to the reception bit error rate, OFDM subcarrier available signal-to-noise ratio thresholding under each modulation system grade is adjusted；

According to the reception bit error rate and current period modulation system currently in use, modulation system is adjusted, and according to institute OFDM subcarrier average received signal-to-noise ratio is stated, show that available subcarrier maps.

Preferably, the statistics receives the step of bit error rate and OFDM subcarrier average received signal-to-noise ratio and includes:

Statistical information is initialized, statistical information includes packet receiving number, receives erroneous packets number, OFDM subcarrier reception letter It makes an uproar ratio, subcarrier average received signal-to-noise ratio；

Received data packet；

It updates packet receiving number and receives erroneous packets number；

Update the received signal to noise ratio of OFDM subcarrier；

Judge whether measurement period terminates；

At the end of measurement period, calculates and obtain the reception bit error rate and OFDM subcarrier average received signal-to-noise ratio.

Preferably, described according to the reception bit error rate, noise can be used by adjusting OFDM subcarrier under each modulation system grade Include: than the step of thresholding

When the reception bit error rate is greater than the preset threshold bit error rate that need to reduce modulation system grade, current adjust is judged Mode processed；

When current modulation mode is that QPSK is modulated, updating QPSK to modulate lower OFDM subcarrier available signal-to-noise ratio thresholding is to increase Add the value after promoting the signal-noise ratio threshold factor；

Judge that QPSK modulates whether lower OFDM subcarrier available signal-to-noise ratio thresholding is more than or equal under 16QAM modulation after updating OFDM subcarrier available signal-to-noise ratio thresholding；

QPSK modulates OFDM under lower OFDM subcarrier available signal-to-noise ratio thresholding is modulated more than or equal to 16QAM and carries after update When wave available signal-to-noise ratio thresholding, updating 16QAM to modulate lower OFDM subcarrier available signal-to-noise ratio thresholding is to increase to promote signal-to-noise ratio door Value after limiting the factor；

Judge that 16QAM modulates whether lower OFDM subcarrier available signal-to-noise ratio thresholding is more than or equal under 64QAM modulation after updating OFDM subcarrier available signal-to-noise ratio thresholding；

16QAM modulates the OFDM that lower OFDM subcarrier available signal-to-noise ratio thresholding is more than or equal under 64QAM modulation after update When subcarrier available signal-to-noise ratio thresholding, updating the OFDM subcarrier available signal-to-noise ratio thresholding under 64QAM modulation is to increase to promote letter Value after making an uproar than threshold factor；

Obtain OFDM subcarrier available signal-to-noise ratio thresholding under each modulation system grade；

When current modulation mode is that 16QAM is modulated, updating OFDM subcarrier available signal-to-noise ratio thresholding under 16QAM is modulated is Increase the value after promoting the signal-noise ratio threshold factor；

When current modulation mode is that 64QAM is modulated, the OFDM subcarrier available signal-to-noise ratio thresholding under 64QAM modulation is updated To increase the value after promoting the signal-noise ratio threshold factor；

Obtain OFDM subcarrier available signal-to-noise ratio thresholding under each modulation system grade.

Preferably, described according to the reception bit error rate, noise can be used by adjusting OFDM subcarrier under each modulation system grade The step of than thresholding further include:

When the reception bit error rate is less than or equal to the preset threshold bit error rate for allowing to be promoted modulation system, judgement is current Modulation system；

When current modulation mode is that QPSK is modulated, updating QPSK to modulate lower OFDM subcarrier available signal-to-noise ratio thresholding is to subtract The value after the signal-noise ratio threshold factor is reduced less；

Judge after updating QPSK modulate lower OFDM subcarrier available signal-to-noise ratio thresholding whether be more than or equal to first preset it is minimum Signal-noise ratio threshold；

QPSK modulates lower OFDM subcarrier available signal-to-noise ratio thresholding less than the first default lowest signal-to-noise thresholding after update When, the first default lowest signal-to-noise thresholding of setting is that QPSK modulates lower OFDM subcarrier available signal-to-noise ratio thresholding after updating；

It obtains QPSK and modulates lower OFDM subcarrier available signal-to-noise ratio thresholding；

When current modulation mode is that 16QAM is modulated, updating OFDM subcarrier available signal-to-noise ratio thresholding under 16QAM is modulated is Reduce the value after reducing the signal-noise ratio threshold factor；

Judge after updating 16QAM modulate lower OFDM subcarrier available signal-to-noise ratio thresholding whether be more than or equal to second preset it is minimum Signal-noise ratio threshold；

16QAM modulates lower OFDM subcarrier available signal-to-noise ratio thresholding less than the second default lowest signal-to-noise thresholding after update When, the second default lowest signal-to-noise thresholding of setting is that 16QAM modulates lower OFDM subcarrier available signal-to-noise ratio thresholding after updating；

It obtains 16QAM and modulates lower OFDM subcarrier available signal-to-noise ratio thresholding；

When current modulation mode is that 64QAM is modulated, updating OFDM subcarrier available signal-to-noise ratio thresholding under 64QAM is modulated is Reduce the value after reducing the signal-noise ratio threshold factor；

Judge after updating 64QAM modulate lower OFDM subcarrier available signal-to-noise ratio thresholding whether be more than or equal to third preset it is minimum Signal-noise ratio threshold；

64QAM modulates lower OFDM subcarrier available signal-to-noise ratio thresholding and presets lowest signal-to-noise thresholding less than third after update When, it is that 64QAM modulates lower OFDM subcarrier available signal-to-noise ratio thresholding after updating that setting third, which presets lowest signal-to-noise thresholding,；

It obtains 64QAM and modulates lower OFDM subcarrier available signal-to-noise ratio thresholding.

Preferably, described according to the reception bit error rate and current period modulation system currently in use, adjust modulation methods Formula, and according to the OFDM subcarrier average received signal-to-noise ratio, show that the step of available subcarrier maps includes:

It is 16QAM modulation by modulation system depression of order when current modulation mode is that 64QAM is modulated；

Lower OFDM subcarrier available signal-to-noise ratio thresholding and OFDM subcarrier average received signal-to-noise ratio, choosing are modulated according to 16QAM It selects out 16QAM and modulates lower available subcarrier mapping；

Judge that 16QAM modulates whether lower available subcarrier number is less than minimum available subcarrier number；

When 16QAM, which modulates lower available subcarrier number, is less than minimum available subcarrier number, it is by modulation system depression of order QPSK modulation；

Lower OFDM subcarrier available signal-to-noise ratio thresholding and OFDM subcarrier average received signal-to-noise ratio, selection are modulated according to QPSK QPSK modulates lower available subcarrier mapping out；

Judge that QPSK modulates whether lower available subcarrier number is less than minimum available subcarrier number；

When QPSK, which modulates lower available subcarrier number, is less than minimum available subcarrier number, selected from all subcarriers The subcarrier of the best minimum available subcarrier number of signal-to-noise ratio out；

Obtain available subcarrier mapping；

It is QPSK modulation by modulation system depression of order when current modulation mode is that 16QAM is modulated；

Obtain available subcarrier mapping；

When current modulation mode is that QPSK is modulated, keep modulation system constant；

Obtain available subcarrier mapping.

Preferably, described according to the reception bit error rate and current period modulation system currently in use, adjust modulation methods Formula, and according to the OFDM subcarrier average received signal-to-noise ratio, obtain the step of available subcarrier maps further include:

When the reception bit error rate is less than or equal to the preset threshold bit error rate for allowing to be promoted modulation system grade, judgement Current modulation mode；

When current modulation mode is that QPSK is modulated, modulation system is promoted to 16QAM modulation；

The available subcarrier selected mapping and subcarrier maps currently in use of upper period are subjected to phase or operation；

Obtain available subcarrier mapping；

When current modulation mode is that 16QAM is modulated, modulation system is promoted to 64QAM modulation；

Lower OFDM subcarrier available signal-to-noise ratio thresholding and OFDM subcarrier average received signal-to-noise ratio, choosing are modulated according to 64QAM It selects out 64QAM and modulates lower available subcarrier mapping；

Judge that 64QAM modulates whether lower available subcarrier number is less than minimum available subcarrier number；

When 64QAM, which modulates lower available subcarrier number, is less than minimum available subcarrier number, it is by modulation system depression of order 16QAM modulation；

Obtain available subcarrier mapping；

When current modulation mode is that 64QAM is modulated, keep modulation system constant；

Obtain available subcarrier mapping.

When the bit error rate that receives permits less than or equal to the threshold bit error rate that need to reduce modulation system grade, and greater than preset When promoting the threshold bit error rate of modulation system grade perhaps, current modulation mode is judged；

Obtain available subcarrier mapping；

When current modulation mode is that 16QAM is modulated, keep modulation system constant；

Obtain available subcarrier mapping；

Obtain available subcarrier mapping.

A kind of wireless self-networking Adaptive Anti-jamming dispatching device of the embodiment of the present invention, comprising:

Statistic unit receives the bit error rate and OFDM subcarrier average received signal-to-noise ratio for counting；

OFDM subcarrier available signal-to-noise ratio thresholding adjustment unit, for adjusting each modulation methods according to the reception bit error rate OFDM subcarrier available signal-to-noise ratio thresholding under formula grade；

Modulation system adjustment and available subcarrier mapping selection unit, for according to the reception bit error rate and current period Modulation system currently in use adjusts modulation system, and according to the OFDM subcarrier average received signal-to-noise ratio, obtains available son Carrier wave mapping.

Preferably, the statistic unit includes:

Statistical information initialization unit, for initializing statistical information, statistical information includes packet receiving number, receives mistake Packet number, OFDM subcarrier reception signal-to-noise ratio, subcarrier average received signal-to-noise ratio；

Data packet receiving unit, is wrapped for receiving data；

Packet receiving number updating unit, for updating packet receiving number and receiving erroneous packets number；

Received signal to noise ratio updating unit, for updating the received signal to noise ratio of OFDM subcarrier；

Measurement period judging unit, for judging whether measurement period terminates；

The bit error rate and OFDM subcarrier average received signal-to-noise ratio obtaining unit are received, for counting at the end of measurement period It calculates to obtain and receives the bit error rate and OFDM subcarrier average received signal-to-noise ratio.

Preferably, the OFDM subcarrier available signal-to-noise ratio thresholding adjustment unit includes:

First modulation system judging unit, for modulation system grade need to be reduced greater than preset when the reception bit error rate Threshold bit error rate when, judge current modulation mode；

First QPSK modulates lower OFDM subcarrier available signal-to-noise ratio thresholding updating unit, for being when current modulation mode When QPSK is modulated, it is after increasing the promotion signal-noise ratio threshold factor that update QPSK, which modulates lower OFDM subcarrier available signal-to-noise ratio thresholding, Value；

First thresholding judging unit, for judging whether QPSK modulates lower OFDM subcarrier available signal-to-noise ratio thresholding after updating Lower OFDM subcarrier available signal-to-noise ratio thresholding is modulated more than or equal to 16QAM；

First 16QAM modulates lower OFDM subcarrier available signal-to-noise ratio thresholding updating unit, for QPSK modulation after updating When lower OFDM subcarrier available signal-to-noise ratio thresholding is more than or equal to OFDM subcarrier available signal-to-noise ratio thresholding under 16QAM is modulated, update It is the value increased after promoting the signal-noise ratio threshold factor that 16QAM, which modulates lower OFDM subcarrier available signal-to-noise ratio thresholding,；

Second thresholding judging unit, for judging that OFDM subcarrier available signal-to-noise ratio thresholding is under 16QAM is modulated after updating OFDM subcarrier available signal-to-noise ratio thresholding under the no modulation more than or equal to 64QAM；

OFDM subcarrier available signal-to-noise ratio thresholding updating unit under first 64QAM modulation, for 16QAM tune after updating When making the OFDM subcarrier available signal-to-noise ratio thresholding that lower OFDM subcarrier available signal-to-noise ratio thresholding is more than or equal under 64QAM is modulated, Updating the OFDM subcarrier available signal-to-noise ratio thresholding under 64QAM modulation is the value increased after promoting the signal-noise ratio threshold factor；

First OFDM subcarrier available signal-to-noise ratio thresholding obtaining unit is carried for obtaining OFDM under each modulation system grade Wave available signal-to-noise ratio thresholding；

First 16QAM modulates lower OFDM subcarrier available signal-to-noise ratio threshold cell, be also used to be when current modulation mode When 16QAM is modulated, it is after increasing the promotion signal-noise ratio threshold factor that update 16QAM, which modulates lower OFDM subcarrier available signal-to-noise ratio thresholding, Value；

OFDM subcarrier available signal-to-noise ratio thresholding updating unit under first 64QAM modulation, is also used to when current modulation methods When formula is that 64QAM is modulated, updating the OFDM subcarrier available signal-to-noise ratio thresholding under 64QAM modulation is to increase to promote signal-noise ratio threshold Value after the factor；

First OFDM subcarrier available signal-to-noise ratio thresholding obtaining unit is carried for obtaining OFDM under each modulation system grade Wave available signal-to-noise ratio thresholding.

Preferably, the OFDM subcarrier available signal-to-noise ratio thresholding adjustment unit further include:

Second modulation system judging unit, for allowing to promote modulation methods less than or equal to preset when the reception bit error rate When the threshold bit error rate of formula, current modulation mode is judged；

2nd QPSK modulates lower OFDM subcarrier available signal-to-noise ratio thresholding updating unit, for being when current modulation mode When QPSK is modulated, it is after reducing the reduction signal-noise ratio threshold factor that update QPSK, which modulates lower OFDM subcarrier available signal-to-noise ratio thresholding, Value；

Third thresholding judging unit, for judging whether QPSK modulates lower OFDM subcarrier available signal-to-noise ratio thresholding after updating More than or equal to the first default lowest signal-to-noise thresholding；

First default lowest signal-to-noise thresholding setting unit can use letter for OFDM subcarrier under QPSK modulation after updating When making an uproar than thresholding less than the first default lowest signal-to-noise thresholding, the first default lowest signal-to-noise thresholding of setting is QPSK tune after updating Make lower OFDM subcarrier available signal-to-noise ratio thresholding；

2nd OFDM subcarrier available signal-to-noise ratio thresholding obtaining unit, it is available for obtaining OFDM subcarrier under QPSK is modulated Signal-noise ratio threshold；

2nd 16QAM modulates lower OFDM subcarrier available signal-to-noise ratio thresholding updating unit, for being when current modulation mode When 16QAM is modulated, it is after reducing the reduction signal-noise ratio threshold factor that update 16QAM, which modulates lower OFDM subcarrier available signal-to-noise ratio thresholding, Value；

4th thresholding judging unit, for judging that OFDM subcarrier available signal-to-noise ratio thresholding is under 16QAM is modulated after updating It is no to be more than or equal to the second default lowest signal-to-noise thresholding；

Second default lowest signal-to-noise thresholding setting unit, it is available for OFDM subcarrier under 16QAM modulation after updating When signal-noise ratio threshold is less than the second default lowest signal-to-noise thresholding, the second default lowest signal-to-noise thresholding of setting is after updating 16QAM modulates lower OFDM subcarrier available signal-to-noise ratio thresholding；

2nd OFDM subcarrier available signal-to-noise ratio thresholding obtaining unit is also used to obtain 16QAM and modulates lower OFDM subcarrier Available signal-to-noise ratio thresholding；

2nd 64QAM modulates lower OFDM subcarrier available signal-to-noise ratio thresholding updating unit, for being when current modulation mode When 64QAM is modulated, it is after reducing the reduction signal-noise ratio threshold factor that update 64QAM, which modulates lower OFDM subcarrier available signal-to-noise ratio thresholding, Value；

5th thresholding judging unit, for judging that OFDM subcarrier available signal-to-noise ratio thresholding is under 64QAM is modulated after updating The no third that is more than or equal to presets lowest signal-to-noise thresholding；

Third presets lowest signal-to-noise thresholding setting unit, available for OFDM subcarrier under 64QAM modulation after updating When signal-noise ratio threshold presets lowest signal-to-noise thresholding less than third, after setting third presets lowest signal-to-noise thresholding as update 64QAM modulates lower OFDM subcarrier available signal-to-noise ratio thresholding；

2nd OFDM subcarrier available signal-to-noise ratio thresholding obtaining unit is also used to obtain 64QAM and modulates lower OFDM subcarrier Available signal-to-noise ratio thresholding.

Preferably, the modulation system adjustment and available subcarrier mapping selection unit include:

Third modulation system judging unit, for modulation system grade need to be reduced greater than preset when the reception bit error rate Threshold bit error rate when, judge current modulation mode；

Depression of order is 16QAM modulation unit, for being by modulation system depression of order when current modulation mode is that 64QAM is modulated 16QAM modulation；

First 16QAM modulates lower available subcarrier mapping selection unit, can for modulating lower OFDM subcarrier according to 16QAM With signal-noise ratio threshold and OFDM subcarrier average received signal-to-noise ratio, selects 16QAM and modulate lower available subcarrier mapping；

First available subcarrier number judging unit, for judging that 16QAM modulates whether lower available subcarrier number is less than Minimum available subcarrier number；

Depression of order is QPSK modulation unit, for being less than minimum available subcarrier when 16QAM modulates lower available subcarrier number It is QPSK modulation by modulation system depression of order when number；

First QPSK modulates lower available subcarrier mapping selection unit, available for modulating lower OFDM subcarrier according to QPSK Signal-noise ratio threshold and OFDM subcarrier average received signal-to-noise ratio select QPSK and modulate lower available subcarrier mapping；

Second available subcarrier number judging unit, for judging that QPSK modulates whether lower available subcarrier number is less than most Few available subcarrier number；

The subcarrier module of selection of minimum available subcarrier number, for being less than when QPSK modulates lower available subcarrier number When minimum available subcarrier number, the son that the best minimum available subcarrier number of signal-to-noise ratio is picked out from all subcarriers is carried Wave；

First available subcarrier maps obtaining unit, for obtaining available subcarrier mapping；

Depression of order be QPSK modulation unit, be also used to when current modulation mode be 16QAM modulation when, be by modulation system depression of order QPSK modulation；

First modulation system holding unit, for keeping modulation system constant when current modulation mode is that QPSK is modulated；

First available subcarrier maps obtaining unit, for obtaining available subcarrier mapping.

Preferably, the modulation system adjustment and available subcarrier mapping selection unit further include:

4th modulation system judging unit, for allowing to promote modulation methods less than or equal to preset when the reception bit error rate When the threshold bit error rate of formula grade, current modulation mode is judged；

It is promoted to 16QAM modulation unit, for when current modulation mode is that QPSK is modulated, modulation system to be promoted to 16QAM modulation；

2nd 16QAM modulates lower available subcarrier mapping selection unit, can for modulating lower OFDM subcarrier according to 16QAM With signal-noise ratio threshold and OFDM subcarrier average received signal-to-noise ratio, selects 16QAM and modulate lower available subcarrier mapping；

Third available subcarrier number judging unit, for judging that 16QAM modulates whether lower available subcarrier number is less than Minimum available subcarrier number；

QPSK modulation unit is recalled to, for being less than minimum available subcarrier number when 16QAM modulates lower available subcarrier number It is QPSK modulation by modulation system depression of order when mesh；

2nd QPSK modulates lower available subcarrier mapping selection unit, available for modulating lower OFDM subcarrier according to QPSK Signal-noise ratio threshold and OFDM subcarrier average received signal-to-noise ratio select QPSK and modulate lower available subcarrier mapping；

First subcarrier maps phase or unit, it is currently in use with the upper period for mapping the available subcarrier selected Subcarrier maps carry out phase or operation；

Second available subcarrier maps obtaining unit, for obtaining available subcarrier mapping；

It is promoted to 64QAM modulation unit, for when current modulation mode is that 16QAM is modulated, modulation system to be promoted to 64QAM modulation；

First 64QAM modulates lower available subcarrier mapping selection unit, can for modulating lower OFDM subcarrier according to 64QAM With signal-noise ratio threshold and OFDM subcarrier average received signal-to-noise ratio, selects 64QAM and modulate lower available subcarrier mapping；

4th available subcarrier number judging unit, for judging that 64QAM modulates whether lower available subcarrier number is less than Minimum available subcarrier number；

16QAM modulation unit is recalled to, for being less than minimum available subcarrier number when 64QAM modulates lower available subcarrier number It is 16QAM modulation by modulation system depression of order when mesh；

3rd 16QAM modulates lower available subcarrier mapping selection unit, can for modulating lower OFDM subcarrier according to 16QAM With signal-noise ratio threshold and OFDM subcarrier average received signal-to-noise ratio, selects 16QAM and modulate lower available subcarrier mapping；

Second modulation system holding unit, for keeping modulation system not when current modulation mode is that 64QAM is modulated Become；

2nd 64QAM modulates lower available subcarrier mapping selection unit, can for modulating lower OFDM subcarrier according to 64QAM With signal-noise ratio threshold and OFDM subcarrier average received signal-to-noise ratio, selects 64QAM and modulate lower available subcarrier mapping；

Second available subcarrier maps obtaining unit, for obtaining available subcarrier mapping.

5th modulation system judging unit, for when the reception bit error rate being less than or equal to that modulation system grade need to be reduced Threshold bit error rate, and be greater than it is preset allow promoted modulation system grade threshold bit error rate when, judge current modulation mode；

QPSK modulates holding unit, for keeping modulation system constant when current modulation mode is that QPSK is modulated；

3rd QPSK modulates lower available subcarrier mapping selection unit, available for modulating lower OFDM subcarrier according to QPSK Signal-noise ratio threshold and OFDM subcarrier average received signal-to-noise ratio select QPSK and modulate lower available subcarrier mapping；

Second subcarrier maps phase or unit, it is currently in use with the upper period for mapping the available subcarrier selected Subcarrier maps carry out phase or operation；

Third available subcarrier maps obtaining unit, for obtaining available subcarrier mapping；

16QAM modulates holding unit, for keeping modulation system constant when current modulation mode is that 16QAM is modulated；

4th 16QAM modulates lower available subcarrier mapping selection unit, can for modulating lower OFDM subcarrier according to 16QAM With signal-noise ratio threshold and OFDM subcarrier average received signal-to-noise ratio, selects 16QAM and modulate lower available subcarrier mapping；

64QAM modulates holding unit, for keeping modulation system constant when current modulation mode is that 64QAM is modulated；

3rd 64QAM modulates lower available subcarrier mapping selection unit, can for modulating lower OFDM subcarrier according to 64QAM With signal-noise ratio threshold and OFDM subcarrier average received signal-to-noise ratio, selects 64QAM and modulate lower available subcarrier mapping；

Third available subcarrier maps obtaining unit, for obtaining available subcarrier mapping.

The technical solution of the embodiment of the present invention, has the advantages that

Wireless self-networking Adaptive Anti-jamming dispatching method and device provided in an embodiment of the present invention, can be according to link channel The quality subcarrier maps that accurate adaptively selected modulation system and wideband OFDM are modulated in real time are guaranteeing to transmit reliable premise Under, promotion transmission capacity as much as possible, to promote wireless system resources utilization rate and communication efficient.

Detailed description of the invention

In order to illustrate more clearly of the technical solution in the specific embodiment of the invention, specific embodiment will be retouched below Attached drawing needed in stating is briefly described, it should be apparent that, the accompanying drawings in the following description is some realities of the invention Mode is applied, it for those of ordinary skill in the art, without creative efforts, can also be attached according to these Figure obtains other attached drawings.

Fig. 1 is the stream of a specific example of wireless self-networking Adaptive Anti-jamming dispatching method in the embodiment of the present invention 1 Cheng Tu；

Fig. 2 is the tool that statistics receives the bit error rate and OFDM subcarrier average received signal-to-noise ratio in the embodiment of the present invention 1 The exemplary flow chart of body；

Fig. 3 be promoted under high bit-error in the embodiment of the present invention 1 one of OFDM subcarrier available signal-to-noise ratio thresholding it is specific Exemplary flow chart；

Fig. 4 be reduced under low error rate in the embodiment of the present invention 1 one of OFDM subcarrier available signal-to-noise ratio thresholding it is specific Exemplary flow chart；

Fig. 5 is that high bit-error declines rank modulation system in the embodiment of the present invention 1 and one of selection subcarrier maps specific Exemplary flow chart；

Fig. 6 be modulation system is promoted in the embodiment of the present invention 1 under low error rate and select one of subcarrier maps it is specific Exemplary flow chart；

Fig. 7 be modulation system is kept in the embodiment of the present invention 1 under the middle bit error rate and select one of subcarrier maps it is specific Exemplary flow chart；

Fig. 8 is the original of a specific example of wireless self-networking Adaptive Anti-jamming dispatching device in the embodiment of the present invention 2 Manage block diagram.

Specific embodiment

Technical solution of the present invention is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation Example is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill Personnel's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the term as used herein is only used for the mesh of description specific embodiment , and it is not intended to limit the present invention.Unless clearly indicated by the context, otherwise singular " one " as used herein, The intentions such as "one" and "the" also include plural form.When using terms such as " include " and or " include ", it is intended to illustrate exist This feature, integer, step, operation, element and/or component, and it is not excluded for one or more other features, integer, step, behaviour Work, element, component, and/or other presence or increase for combining.Term " first ", " second ", " third " etc. are only used for description mesh , it is not understood to indicate or imply relative importance.It for the ordinary skill in the art, can be with concrete condition Understand the concrete meaning of above-mentioned term in the present invention.

Although exemplary embodiment is described as executing example process using multiple units, however it will be appreciated that It is that the example process can also be executed by one or more modules.Further it will be understood that term controller/control Unit refer to include memory and processor hardware device.Memory is configured to store module, and processor is specially matched It is set to the process for executing and storing in above-mentioned memory module, thereby executing one or more processes.

As long as in addition, the non-structure each other of technical characteristic involved in invention described below different embodiments It can be combined with each other at conflict.

Embodiment 1

The present embodiment provides a kind of wireless self-networking Adaptive Anti-jamming dispatching methods, as shown in Figure 1, including following step It is rapid:

S1, statistics receive the bit error rate and OFDM subcarrier average received signal-to-noise ratio；

S2, according to the reception bit error rate, adjust OFDM subcarrier available signal-to-noise ratio thresholding under each modulation system grade；

S3, according to the reception bit error rate and current period modulation system currently in use, adjust modulation system, determination is It increases or downgrades and be also to maintain modulation system, and according to the OFDM subcarrier average received signal-to-noise ratio, compared with thresholding, choosing New subcarrier is selected, show that available subcarrier maps.

Preferably, as shown in Fig. 2, node periodic statistics receive message scenario.

The statistics of S1 receives the step of bit error rate and OFDM subcarrier average received signal-to-noise ratio and includes:

S1-1, statistical information initialization: in each measurement period, statistical information is initialized first, statistical information parameter Including packet receiving number, packet receiving number of errors, each subcarrier reception signal-to-noise ratio of wideband OFDM modulation, each subcarrier average received letter It makes an uproar and compares, be initialized as 0.

S1-2, data packet is received.

S1-3, it updates packet receiving number and receives erroneous packets number: whenever node issues disappearing for oneself from aerial reception one Data packet is ceased, total packet number will be just received and add 1, if data packet loading error occurring, erroneous packets number will be received and add 1.

S1-4, it updates each reception sub-carrier signal-noise ratio under wideband OFDM modulation: the subcarrier of each OFDM modulation is carried out Traversal, the signal-to-noise ratio of each subcarrier is added in the received signal to noise ratio summation of each subcarrier.

S1-5, do you judge that measurement period terminates? at the end of measurement period, S1-6 is entered step；It is not tied in measurement period Shu Shi, return step S1-2.

S1-6, the reception bit error rate is calculated, calculates each subcarrier average received signal-to-noise ratio: calculates the reception bit error rate first, Calculation method is with reception erroneous packets number divided by total receiver packet number；Then it calculates OFDM and modulates each subcarrier average signal-to-noise ratio, Calculation method is traversed to each subcarrier, with the accumulative signal-to-noise ratio of the subcarrier divided by total reception packet number, is obtained The average received signal-to-noise ratio of the subcarrier.

Preferably, as shown in figure 3, S2 according to the reception bit error rate, adjust under each modulation system grade OFDM and carry The step of wave available signal-to-noise ratio thresholding includes:

S2-1-1, judge current modulation mode: if measurement period, which terminates to calculate, receives the bit error rate higher than systemic presupposition " threshold bit error rate that modulation system grade need to be reduced ", then need by under current modulation mode OFDM modulate available subcarrier choosing The signal-noise ratio threshold selected is promoted.It is distinguished according to currently used modulation system, if current modulation mode is minimum The QPSK of rank is modulated, then enters step S2-1-2；If current modulation mode is 16QAM, S2-1-4 is entered step；If worked as Preceding modulation is 64QAM, then enters step S2-1-6.

S2-1-2, QPSK (available) signal-noise ratio threshold for modulating lower OFDM sub-carrier selection is increased into " promotion signal-to-noise ratio door Limit the factor ", show that new QPSK modulates the signal-noise ratio threshold of lower OFDM sub-carrier selection, and update.

S2-1-3, for guarantee OFDM modulated sub-carriers selection signal-noise ratio threshold it is lower under low-order-modulated mode, need The signal-noise ratio threshold under the OFDM modulated sub-carriers available signal-to-noise ratio thresholding and 16QAM under new QPSK modulation system is compared, such as Fruit the former be higher than the latter, then enter step S2-1-4, i.e., signal-noise ratio threshold under 16QAM is also increased " promotion signal-noise ratio threshold because Son " show that new 16QAM modulates the signal-noise ratio threshold of lower OFDM sub-carrier selection, and will be under this thresholding and 64QAM modulation OFDM subcarrier available signal-to-noise ratio thresholding is compared, if the former is higher than the latter, signal-noise ratio threshold under 64QAM is also increased " promoting the signal-noise ratio threshold factor " show that new 64QAM modulates the signal-noise ratio threshold of lower OFDM sub-carrier selection；If the former is low In the latter, then S2-1-7 is entered step.

S2-1-4, the signal-noise ratio threshold that 16QAM is modulated to lower OFDM sub-carrier selection increase " promoted signal-noise ratio threshold because Son " show that new 16QAM modulates the signal-noise ratio threshold of lower OFDM sub-carrier selection, and updates.

S2-1-5, this new 16QAM is modulated under the signal-noise ratio threshold of OFDM sub-carrier selection down and 64QAM modulation OFDM subcarrier available signal-to-noise ratio thresholding is compared, if the former is higher than the latter, enters step S2-1-6, i.e., by 64QAM Lower signal-noise ratio threshold also increases " promoting the signal-noise ratio threshold factor ", show that new 64QAM modulates the letter of lower OFDM sub-carrier selection It makes an uproar and compares thresholding；If the former is lower than the latter, S2-1-7 is entered step.

S2-1-6, the signal-noise ratio threshold that 64QAM is modulated to lower OFDM sub-carrier selection increase " promoted signal-noise ratio threshold because Son " show that new 64QAM modulates the signal-noise ratio threshold of lower OFDM sub-carrier selection, and updates.

S2-1-7, it updates and completes OFDM subcarrier available signal-to-noise ratio thresholding under each modulation system grade.

Preferably, as shown in figure 4, S2 according to the reception bit error rate, adjust under each modulation system grade OFDM and carry The step of wave available signal-to-noise ratio thresholding further include:

S2-2-1, judge current modulation mode: if measurement period terminates to calculate, to receive the bit error rate pre- not higher than system If the threshold bit error rate of modulation system " allow promoted ", then need to modulate OFDM under current modulation mode into available subcarrier choosing The signal-noise ratio threshold selected is reduced.It is distinguished according to currently used modulation system, if current modulation mode is QPSK Modulation, then enter step S2-2-2；If current modulation mode is 16QAM modulation, S2-2-5 is entered step；If current adjust Mode processed is 64QAM modulation, then enters step S2-2-8.

S2-2-2, the signal-noise ratio threshold that QPSK is modulated to lower OFDM sub-carrier selection reduce " reduce signal-noise ratio threshold because Son ", and update, obtain the signal-noise ratio threshold that new QPSK modulates lower OFDM sub-carrier selection.

S2-2-3, the QPSK of this result and systemic presupposition is modulated the lowest signal-to-noise thresholding of lower OFDM sub-carrier selection into Row compares, if the former is big, enters step S2-2-11, that is, obtains the noise that new QPSK modulates lower OFDM sub-carrier selection Compare thresholding；Otherwise, S2-2-4 is entered step.

It is that new QPSK modulates lower OFDM subcarrier that S2-2-4, setting systemic presupposition QPSK, which modulate lower lowest signal-to-noise thresholding, The signal-noise ratio threshold of selection.

S2-2-5, the signal-noise ratio threshold that 16QAM is modulated to lower OFDM sub-carrier selection reduce " reduce signal-noise ratio threshold because Son ", and update, obtain the signal-noise ratio threshold that new 16QAM modulates lower OFDM sub-carrier selection.

S2-2-6, the lowest signal-to-noise thresholding that the 16QAM of this result and systemic presupposition is modulated to lower OFDM sub-carrier selection It is compared, if the former is big, enters step S2-2-11, that is, obtain the letter that new 16QAM modulates lower OFDM sub-carrier selection It makes an uproar and compares thresholding；Otherwise, S2-2-7 is entered step.

It is that new lower OFDM of 16QAM modulation carries that S2-2-7, setting systemic presupposition 16QAM, which modulate lower lowest signal-to-noise thresholding, The signal-noise ratio threshold of wave selection.

S2-2-8, the signal-noise ratio threshold that 64QAM is modulated to lower OFDM sub-carrier selection reduce " reduce signal-noise ratio threshold because Son ", and update, obtain the signal-noise ratio threshold that new 64QAM modulates lower OFDM sub-carrier selection.

S2-2-9, the lowest signal-to-noise thresholding that the 64QAM of this result and systemic presupposition is modulated to lower OFDM sub-carrier selection It is compared, if the former is big, enters step S2-2-11, that is, obtain the letter that new 64QAM modulates lower OFDM sub-carrier selection It makes an uproar and compares thresholding；Otherwise, S2-2-10 is entered step.

It is that new 64QAM modulates lower OFDM that S2-2-10, setting systemic presupposition 64QAM, which modulate lower lowest signal-to-noise thresholding, The signal-noise ratio threshold of carrier wave selection.

S2-2-11, it updates and completes OFDM subcarrier available signal-to-noise ratio thresholding under each modulation system grade.

Preferably, as shown in figure 5, S3 according to the reception bit error rate and current period modulation system currently in use, Modulation system is adjusted, and according to the OFDM subcarrier average received signal-to-noise ratio, show that the step of available subcarrier maps includes:

S3-1-1, judge current modulation mode: if measurement period, which terminates to calculate, receives the bit error rate higher than systemic presupposition " threshold bit error rate that modulation system grade need to be reduced ", then need to reduce modulation system grade, and according to the OFDM under the grade Subcarrier available signal-to-noise ratio thresholding calculates new subcarrier maps.It is distinguished according to currently used modulation system, if worked as Preceding modulation system is most high-order 64QAM modulation, then enters step S3-1-2；If current modulation mode is 16QAM modulation, into Enter step S3-1-5；If current modulation mode is QPSK, S3-1-9 is entered step.

S3-1-2, by modulation system depression of order be 16QAM.

It is S3-1-3, sub to OFDM under the average received signal-to-noise ratio and 16QAM modulation system of each subcarrier of OFDM modulation The signal-noise ratio threshold of carrier wave selection is compared, if average received signal-to-noise ratio is higher than thresholding, then it is assumed that the subcarrier can select With having traversed all subcarriers otherwise it is assumed that the sub-carrier frequencies are disturbed or multipath fading frequency, subcarrier cannot use Afterwards, show that available subcarrier maps.

Does is the available subcarrier number that S3-1-4, judgement are selected less than minimum available subcarrier number M? if all available sons The sum of number of carrier wave is not less than minimum number of subcarriers M as defined in system, then using this subcarrier maps as the OFDM in new period Available subcarrier mapping is modulated, modulation system of the modulation system 16QAM as the new period enters step S3-1-10.If all The sum of number of usable subcarriers is less than minimum number of subcarriers M as defined in system, then illustrates that 16QAM can not be used, into step Rapid S3-1-5, that is, needing to further decrease modulation system is QPSK, then to the average received of each subcarrier of OFDM modulation Signal-to-noise ratio is compared with the signal-noise ratio threshold of OFDM sub-carrier selection under QPSK modulation system, and is obtained under QPSK modulation system Available subcarrier mapping will if the sum of all number of usable subcarriers are not less than minimum number of subcarriers M as defined in system OFDM modulation available subcarrier mapping of this subcarrier maps as the new period, modulation methods of the modulation system QPSK as the new period Formula.If the sum of number of usable subcarriers is less than minimum number of subcarriers M as defined in system, picked out from all subcarriers M best subcarrier of signal-to-noise ratio, as the OFDM modulation available subcarrier mapping in new period, modulation system QPSK is as new week The modulation system of phase.

S3-1-5, by modulation system depression of order be QPSK.

S3-1-6, OFDM under the average received signal-to-noise ratio and QPSK modulation system of the OFDM each subcarrier modulated is carried The signal-noise ratio threshold of wave selection is compared, if average received signal-to-noise ratio is higher than thresholding, then it is assumed that and the subcarrier can be selected, Otherwise it is assumed that the sub-carrier frequencies are disturbed or multipath fading frequency, subcarrier cannot use, after having traversed all subcarriers, Show that available subcarrier maps under QPSK modulation system.

Does is the available subcarrier number that S3-1-7, judgement are selected less than minimum available subcarrier number M? if all available sons The sum of number of carrier wave is not less than minimum number of subcarriers M as defined in system, then using this subcarrier maps as the OFDM in new period Available subcarrier mapping is modulated, modulation system of the modulation system QPSK as the new period enters step S3-1-10.If available The sum of number of subcarriers is less than minimum number of subcarriers M as defined in system, then enters step S3-1-8.

S3-1-8, M best subcarrier of signal-to-noise ratio is picked out from all subcarriers, the OFDM as the new period is modulated Available subcarrier mapping, modulation system of the modulation system QPSK as the new period.

S3-1-9, continue to keep modulation system constant, subsequently into step S3-1-6, i.e., every height of OFDM modulation be carried The average received signal-to-noise ratio of wave is compared with the signal-noise ratio threshold of OFDM sub-carrier selection under QPSK modulation system, and is obtained Available subcarrier maps under QPSK modulation system, if the sum of all number of usable subcarriers are not less than minimum son as defined in system Number of carrier wave M, then using this subcarrier maps as the OFDM in new period modulation available subcarrier mapping, modulation system QPSK conduct The modulation system in new period.If the sum of number of usable subcarriers is less than minimum number of subcarriers M as defined in system, from all M best subcarrier of signal-to-noise ratio is picked out in subcarrier, as the OFDM modulation available subcarrier mapping in new period, modulation methods Modulation system of the formula QPSK as the new period.

S3-1-10, it show that OFDM modulates new available subcarrier mapping, obtains adaptive depression of order modulation system and selection OFDM modulates available subcarrier mapping.

Preferably, as shown in fig. 6, S3 according to the reception bit error rate and current period modulation system currently in use, Modulation system is adjusted, and according to the OFDM subcarrier average received signal-to-noise ratio, show that the step of available subcarrier maps also is wrapped It includes:

S3-2-1, do you judge current modulation mode? if measurement period terminates to calculate, to receive the bit error rate pre- not higher than system If the threshold bit error rate of modulation system grade " allow promoted ", then can promote modulation system grade, and according under the grade OFDM subcarrier available signal-to-noise ratio thresholding calculates new subcarrier maps.It is distinguished according to currently used modulation system, such as Fruit current modulation mode is lowest-order QPSK modulation, then enters step S3-2-2；If current modulation mode is 16QAM, into Enter step S3-2-8；If current modulation mode is the 64QAM of most high-order, S3-2-13 is entered step.

S3-2-2, promotion modulation system grade are 16QAM.

It is S3-2-3, sub to OFDM under the average received signal-to-noise ratio and 16QAM modulation system of each subcarrier of OFDM modulation The signal-noise ratio threshold of carrier wave selection is compared, if average received signal-to-noise ratio is higher than thresholding, then it is assumed that the subcarrier can select With having traversed all subcarriers otherwise it is assumed that the sub-carrier frequencies are disturbed or multipath fading frequency, subcarrier cannot use Afterwards, show that available subcarrier maps.

Does is the available subcarrier number that S3-2-4, judgement are selected less than minimum available subcarrier number M? if all available sons The sum of number of carrier wave is not less than minimum number of subcarriers M as defined in system, then using this subcarrier maps as the OFDM in new period Available subcarrier mapping is modulated, modulation system of the modulation system 16QAM as the new period enters step S3-2-15.If all The sum of number of usable subcarriers is less than minimum number of subcarriers M as defined in system, then illustrates that 16QAM cannot be used, enter step S3-2-5。

S3-2-5, QPSK modulation system is continued to use.

S3-2-6, OFDM under the average received signal-to-noise ratio and QPSK modulation system of the OFDM each subcarrier modulated is carried The signal-noise ratio threshold of wave selection is compared, and show that available subcarrier maps under QPSK modulation system.

S3-2-7, it is not promoted due to modulation system, is mapped to be as much as possible using effective available subcarrier, it can will Calculated available subcarrier mapping is with subcarrier maps phase currently in use of upper period or, guaranteeing that the continuation of atom carrier wave is selected It uses, obtains OFDM modulation available subcarrier mapping of the new subcarrier maps as the new period, modulation system QPSK is as new The modulation system in period.

S3-2-8, promotion modulation system grade are 64QAM.

It is S3-2-9, sub to OFDM under the average received signal-to-noise ratio and 64QAM modulation system of each subcarrier of OFDM modulation The signal-noise ratio threshold of carrier wave selection is compared, if average received signal-to-noise ratio is higher than thresholding, then it is assumed that the subcarrier can select With having traversed all subcarriers otherwise it is assumed that the sub-carrier frequencies are disturbed or multipath fading frequency, subcarrier cannot use Afterwards, show that available subcarrier maps.

Does is the available subcarrier number that S3-2-10, judgement are selected less than minimum available subcarrier number M? if all available The sum of number of subcarriers is not less than minimum number of subcarriers M as defined in system, then using this subcarrier maps as the new period OFDM modulates available subcarrier mapping, and modulation system of the modulation system 64QAM as the new period enters step S3-2-15.If The sum of all number of usable subcarriers are less than minimum number of subcarriers M as defined in system, then illustrate that 64QAM cannot be used, enter Step S3-2-11.

S3-2-11,16QAM modulation system is continued to use.

It is S3-2-12, sub to OFDM under the average received signal-to-noise ratio and 16QAM modulation system of each subcarrier of OFDM modulation The signal-noise ratio threshold of carrier wave selection is compared, and show that available subcarrier maps under 16QAM modulation system.Subsequently into step S3-2-7 can map calculated available subcarrier and son currently in use of upper period that is, since modulation system is not promoted Carrier wave maps mutually or, guaranteeing that atom carrier wave continues to obtain OFDM tune of the new subcarrier maps as the new period by selection use Available subcarrier mapping processed, modulation system of the modulation system 16QAM as the new period.

S3-2-13, continue the 64QAM modulation system.

It is S3-2-14, sub to OFDM under the average received signal-to-noise ratio and 64QAM modulation system of each subcarrier of OFDM modulation The signal-noise ratio threshold of carrier wave selection is compared, and show that available subcarrier maps under 64QAM modulation system.Subsequently into step S3-2-7 can map calculated available subcarrier and son currently in use of upper period that is, since modulation system is not promoted Carrier wave maps mutually or, guaranteeing that atom carrier wave continues to obtain OFDM tune of the new subcarrier maps as the new period by selection use Available subcarrier mapping processed, modulation system of the modulation system 64QAM as the new period.

S3-2-15, it show that OFDM modulates new available subcarrier mapping, obtains adaptive boosting modulation system and selection OFDM modulates available subcarrier mapping.

Preferably, as shown in fig. 7, S3 according to the reception bit error rate and current period modulation system currently in use, Modulation system is adjusted, and according to the OFDM subcarrier average received signal-to-noise ratio, show that the step of available subcarrier maps also is wrapped It includes:

S3-3-1, do you judge current modulation mode? if measurement period, which terminates to calculate, receives the bit error rate higher than systemic presupposition The threshold bit error rate of modulation system grade " allow promoted ", while not higher than " bit error rate door of modulation system grade need to be reduced Limit ", then keep modulation system grade constant, recalculate the OFDM subcarrier maps under the modulation system grade.According to current The modulation system used distinguishes, if current modulation mode is QPSK modulation, enters step S3-3-2；If current adjust Mode processed is 16QAM modulation, then enters step S3-3-5；If current modulation mode is 64QAM modulation, S3- is entered step 3-7。

S3-3-2, QPSK modulation system is continued to use.

S3-3-3, OFDM under the average received signal-to-noise ratio and QPSK modulation system of the OFDM each subcarrier modulated is carried The signal-noise ratio threshold of wave selection is compared, and show that available subcarrier maps under QPSK modulation system.

S3-3-4, it is not promoted due to modulation system, is mapped to be as much as possible using effective available subcarrier, it can will Calculated available subcarrier mapping is with subcarrier maps phase currently in use of upper period or, guaranteeing that the continuation of atom carrier wave is selected It uses, obtains OFDM modulation available subcarrier mapping of the new subcarrier maps as the new period, modulation system QPSK is as new The modulation system in period, enters step S3-3-9.

S3-3-5,16QAM modulation system is continued to use.

It is S3-3-6, sub to OFDM under the average received signal-to-noise ratio and 16QAM modulation system of each subcarrier of OFDM modulation The signal-noise ratio threshold of carrier wave selection is compared, and show that available subcarrier maps under 16QAM modulation system, subsequently into step S3-3-4 mapped calculated available subcarrier with subcarrier maps phase currently in use of upper period or, guaranteeing that atom carries Wave continues to be used by selection, obtains OFDM modulation available subcarrier mapping of the new subcarrier maps as the new period, modulation methods Modulation system of the formula 16QAM as the new period, enters step S3-3-9.

S3-3-7,64QAM modulation system is continued to use.

It is S3-3-8, sub to OFDM under the average received signal-to-noise ratio and 64QAM modulation system of each subcarrier of OFDM modulation The signal-noise ratio threshold of carrier wave selection is compared, and show that available subcarrier maps under 64QAM modulation system, subsequently into step S3-3-4 mapped calculated available subcarrier with subcarrier maps phase currently in use of upper period or, guaranteeing that atom carries Wave continues to be used by selection, obtains OFDM modulation available subcarrier mapping of the new subcarrier maps as the new period, modulation methods Modulation system of the formula 64QAM as the new period, enters step S3-3-9.

S3-3-9, the OFDM modulation available subcarrier mapping for obtaining adaptive holding modulation system and selection.

Above-mentioned wireless self-networking Adaptive Anti-jamming dispatching method, solves: one, wireless self-networking communicates Adaptive Modulation Mode criterion cannot be fully accurate reflection channel conditions, so as to cause the defect of transmission error code；Two, wireless self-networking broadband OFDM modulation under, cannot adaptively selected suitable subcarrier maps defect, manual subcarrier maps interference time varying channel, Or under the conditions of multipath frequency selective fading channels, easily cause transmission error code.

The present embodiment is reflected by adaptively selected subcarrier under a kind of adaptively selected modulation system and wideband OFDM modulation The method penetrated, first design criteria parameter, adaptive for modulation system, the present embodiment is in tri- kinds of height of QPSK, 16QAM, 64QAM It is adaptively selected between rank modulation system, using the transmission error rates criteria parameter adaptive as modulation system.For wideband OFDM Subcarrier is adaptively selected, designs using the average signal-to-noise ratio of each subcarrier as criteria parameter, and is arranged under various modulation systems sub The whether available signal-to-noise ratio decision threshold of carrier wave.

The present embodiment signal-noise ratio threshold dynamic adjusting method adaptively selected by the subcarrier of OFDM a kind of, at every kind Thresholding under modulation system carries out dynamic adjustment and thresholding is promoted in high bit-error, in low bit error to receive the bit error rate as foundation Thresholding is reduced when rate, but is not less than the minimum threshold of systemic presupposition.Allow across rank degradation when modulation system depression of order, modulation system mentions Do not allow across rank promotion when rising, that is, allows from 64QAM depression of order to be QPSK, do not allow directly to be promoted to 64QAM from QPSK.

The present embodiment is by a kind of adaptively selected modulation system, and the adaptively selected OFDM tune after selecting modulation mode The method of the available subcarrier mapping of system, it is adaptively selected for modulation system, in high bit-error, reduce modulation system etc. Grade, but no longer depression of order after lowest-order modulation system；When low error rate, modulation system grade is promoted；When the bit error rate is moderate, maintain to adjust Mode grade processed.

It is adaptively selected for the subcarrier of OFDM modulation, the average received signal-to-noise ratio of each subcarrier and thresholding are carried out Compare, if sub-carrier signal-noise ratio is higher than thresholding, the subcarrier is available, and otherwise the subcarrier is unavailable, needs to be deducted, obtain Available subcarrier maps out.To make court verdict fast convergence, the concussion probability of court verdict is reduced, it is specified that OFDM is modulated most Few available subcarrier mapping amount M, when the number of usable subcarriers under certain modulation system according to judgement according to calculating is less than M When, then it is assumed that the modulation system is unavailable, needs to reduce modulation system, and selects OFDM modulation under corresponding modulation system grade Subcarrier maps.

The wireless self-networking Adaptive Anti-jamming dispatching method of the present embodiment, can be accurate in real time certainly according to Link Channel Quality The subcarrier maps of selecting modulation mode and wideband OFDM modulation are adapted to, it is as much as possible under the premise of guaranteeing that transmission is reliable Transmission capacity is promoted, to promote wireless system resources utilization rate and communication efficient.

Embodiment 2

Corresponding to embodiment 1, originally applies example and a kind of wireless self-networking Adaptive Anti-jamming dispatching device is provided, as shown in figure 8, Include:

Statistic unit 1 receives the bit error rate and OFDM subcarrier average received signal-to-noise ratio for counting；

OFDM subcarrier available signal-to-noise ratio thresholding adjustment unit 2, for adjusting each modulation methods according to the reception bit error rate OFDM subcarrier available signal-to-noise ratio thresholding under formula grade；

Modulation system adjustment and available subcarrier mapping selection unit 3, for according to the reception bit error rate and current week Phase modulation system currently in use adjusts modulation system, and according to the OFDM subcarrier average received signal-to-noise ratio, obtains available Subcarrier maps.

Preferably, the statistic unit includes:

Data packet receiving unit, is wrapped for receiving data；

The wireless self-networking Adaptive Anti-jamming dispatching device of the present embodiment, can be accurate in real time certainly according to Link Channel Quality The subcarrier maps of selecting modulation mode and wideband OFDM modulation are adapted to, it is as much as possible under the premise of guaranteeing that transmission is reliable Transmission capacity is promoted, to promote wireless system resources utilization rate and communication efficient.

Obviously, the above embodiments are merely examples for clarifying the description, and does not limit the embodiments.It is right For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or It changes.There is no necessity and possibility to exhaust all the enbodiments.And it is extended from this it is obvious variation or It changes still within the protection scope of the invention.

Claims

1. a kind of wireless self-networking Adaptive Anti-jamming dispatching method, which comprises the following steps:

According to the reception bit error rate and current period modulation system currently in use, modulation system is adjusted, and according to described OFDM subcarrier average received signal-to-noise ratio show that available subcarrier maps.

2. wireless self-networking Adaptive Anti-jamming dispatching method according to claim 1, which is characterized in that the statistics connects It receives the bit error rate and the step of OFDM subcarrier average received signal-to-noise ratio includes:

Statistical information is initialized, statistical information includes packet receiving number, receives erroneous packets number, OFDM subcarrier reception noise Than, subcarrier average received signal-to-noise ratio；

Received data packet；

It updates packet receiving number and receives erroneous packets number；

Update the received signal to noise ratio of OFDM subcarrier；

Judge whether measurement period terminates；

3. wireless self-networking Adaptive Anti-jamming dispatching method according to claim 1 or 2, which is characterized in that described According to the reception bit error rate, the step of adjusting OFDM subcarrier available signal-to-noise ratio thresholding under each modulation system grade, includes:

When the reception bit error rate is greater than the preset threshold bit error rate that need to reduce modulation system grade, current modulation methods are judged Formula；

When current modulation mode is that QPSK is modulated, updating QPSK to modulate lower OFDM subcarrier available signal-to-noise ratio thresholding is to increase to mention Value after rising the signal-noise ratio threshold factor；

Judge that QPSK modulates whether lower OFDM subcarrier available signal-to-noise ratio thresholding is more than or equal to OFDM under 16QAM is modulated after updating Carrier wave available signal-to-noise ratio thresholding；

OFDM subcarrier can under OFDM subcarrier available signal-to-noise ratio thresholding is modulated more than or equal to 16QAM under QPSK is modulated after update When with signal-noise ratio threshold, update 16QAM modulate lower OFDM subcarrier available signal-to-noise ratio thresholding be increase promoted signal-noise ratio threshold because Value after son；

OFDM that 16QAM modulates that lower OFDM subcarrier available signal-to-noise ratio thresholding is more than or equal under 64QAM modulation after update carries When wave available signal-to-noise ratio thresholding, updating the OFDM subcarrier available signal-to-noise ratio thresholding under 64QAM modulation is to increase to promote signal-to-noise ratio Value after threshold factor；

When current modulation mode is that 16QAM is modulated, updating 16QAM to modulate lower OFDM subcarrier available signal-to-noise ratio thresholding is to increase Value after promoting the signal-noise ratio threshold factor；

When current modulation mode is that 64QAM is modulated, updating the OFDM subcarrier available signal-to-noise ratio thresholding under 64QAM modulation is to increase Add the value after promoting the signal-noise ratio threshold factor；

4. wireless self-networking Adaptive Anti-jamming dispatching method according to claim 3, which is characterized in that described according to institute The step of stating the reception bit error rate, adjusting OFDM subcarrier available signal-to-noise ratio thresholding under each modulation system grade further include:

When the reception bit error rate is less than or equal to the preset threshold bit error rate for allowing to be promoted modulation system, current modulation is judged Mode；

When current modulation mode is that QPSK is modulated, updating QPSK to modulate lower OFDM subcarrier available signal-to-noise ratio thresholding is to reduce drop Value after low signal-to-noise ratio threshold factor；

Judge after updating that QPSK modulates lower OFDM subcarrier available signal-to-noise ratio thresholding and whether is more than or equal to first and presets minimum noise Compare thresholding；

When QPSK modulates lower OFDM subcarrier available signal-to-noise ratio thresholding less than the first default lowest signal-to-noise thresholding after update, if It sets the first default lowest signal-to-noise thresholding and modulates lower OFDM subcarrier available signal-to-noise ratio thresholding for QPSK after update；

When current modulation mode is that 16QAM is modulated, updating 16QAM to modulate lower OFDM subcarrier available signal-to-noise ratio thresholding is to reduce Value after reducing the signal-noise ratio threshold factor；

Judge after updating that 16QAM modulates lower OFDM subcarrier available signal-to-noise ratio thresholding and whether is more than or equal to second and presets minimum noise Compare thresholding；

When 16QAM modulates lower OFDM subcarrier available signal-to-noise ratio thresholding less than the second default lowest signal-to-noise thresholding after update, Second default lowest signal-to-noise thresholding is set and modulates lower OFDM subcarrier available signal-to-noise ratio thresholding for 16QAM after update；

When current modulation mode is that 64QAM is modulated, updating 64QAM to modulate lower OFDM subcarrier available signal-to-noise ratio thresholding is to reduce Value after reducing the signal-noise ratio threshold factor；

Judge after updating that 64QAM modulates lower OFDM subcarrier available signal-to-noise ratio thresholding and whether is more than or equal to third and presets minimum noise Compare thresholding；

When OFDM subcarrier available signal-to-noise ratio thresholding presets lowest signal-to-noise thresholding less than third under 64QAM is modulated after update, It is that 64QAM modulates lower OFDM subcarrier available signal-to-noise ratio thresholding after updating that third, which is arranged, to preset lowest signal-to-noise thresholding；

5. wireless self-networking Adaptive Anti-jamming dispatching method according to claim 1-4, which is characterized in that institute It states according to the reception bit error rate and current period modulation system currently in use, adjusts modulation system, and according to the OFDM Subcarrier average received signal-to-noise ratio show that the step of available subcarrier maps includes:

Lower OFDM subcarrier available signal-to-noise ratio thresholding and OFDM subcarrier average received signal-to-noise ratio are modulated according to 16QAM, is selected 16QAM modulates lower available subcarrier mapping；

It is QPSK by modulation system depression of order when 16QAM, which modulates lower available subcarrier number, is less than minimum available subcarrier number Modulation；

Lower OFDM subcarrier available signal-to-noise ratio thresholding and OFDM subcarrier average received signal-to-noise ratio are modulated according to QPSK, is selected QPSK modulates lower available subcarrier mapping；

When QPSK, which modulates lower available subcarrier number, is less than minimum available subcarrier number, letter is picked out from all subcarriers It makes an uproar than the subcarrier of best minimum available subcarrier number；

Obtain available subcarrier mapping；

Obtain available subcarrier mapping.

6. wireless self-networking Adaptive Anti-jamming dispatching method according to claim 5, which is characterized in that described according to institute It states and receives the bit error rate and current period modulation system currently in use, adjust modulation system, and flat according to the OFDM subcarrier Equal received signal to noise ratio obtains the step of available subcarrier maps further include:

When the reception bit error rate is less than or equal to the preset threshold bit error rate for allowing to be promoted modulation system grade, judgement is current Modulation system；

Obtain available subcarrier mapping；

Lower OFDM subcarrier available signal-to-noise ratio thresholding and OFDM subcarrier average received signal-to-noise ratio are modulated according to 64QAM, is selected 64QAM modulates lower available subcarrier mapping；

It is 16QAM by modulation system depression of order when 64QAM, which modulates lower available subcarrier number, is less than minimum available subcarrier number Modulation；

Obtain available subcarrier mapping；

Obtain available subcarrier mapping.

7. wireless self-networking Adaptive Anti-jamming dispatching method according to claim 5 or 6, which is characterized in that described According to the reception bit error rate and current period modulation system currently in use, modulation system is adjusted, and is carried according to OFDM The equal received signal to noise ratio of popin obtains the step of available subcarrier maps further include:

When the reception bit error rate allows to mention less than or equal to the threshold bit error rate that need to reduce modulation system grade, and greater than preset When rising the threshold bit error rate of modulation system grade, current modulation mode is judged；

Obtain available subcarrier mapping；

Obtain available subcarrier mapping.

8. a kind of wireless self-networking Adaptive Anti-jamming dispatching device characterized by comprising

OFDM subcarrier available signal-to-noise ratio thresholding adjustment unit, for adjusting each modulation system etc. according to the reception bit error rate The lower OFDM subcarrier available signal-to-noise ratio thresholding of grade；

Modulation system adjustment and available subcarrier mapping selection unit, for according to the reception bit error rate and current period The modulation system used adjusts modulation system, and according to the OFDM subcarrier average received signal-to-noise ratio, obtains available subcarrier Mapping.

9. wireless self-networking Adaptive Anti-jamming dispatching device according to claim 8, which is characterized in that the statistics is single Member includes:

Statistical information initialization unit, for initializing statistical information, statistical information includes packet receiving number, receives erroneous packets Number, OFDM subcarrier reception signal-to-noise ratio, subcarrier average received signal-to-noise ratio；

Data packet receiving unit, is wrapped for receiving data；

The bit error rate and OFDM subcarrier average received signal-to-noise ratio obtaining unit are received, at the end of measurement period, calculating to be obtained The bit error rate and OFDM subcarrier average received signal-to-noise ratio must be received.

10. wireless self-networking Adaptive Anti-jamming dispatching method according to claim 8 or claim 9, which is characterized in that described OFDM subcarrier available signal-to-noise ratio thresholding adjustment unit includes:

First modulation system judging unit, for being greater than the preset mistake that need to reduce modulation system grade when the reception bit error rate When code rate thresholding, current modulation mode is judged；

QPSK modulates lower OFDM subcarrier available signal-to-noise ratio thresholding updating unit, for being QPSK modulation when current modulation mode When, updating QPSK to modulate lower OFDM subcarrier available signal-to-noise ratio thresholding is the value increased after promoting the signal-noise ratio threshold factor；

First thresholding judging unit, for judging that QPSK modulates whether lower OFDM subcarrier available signal-to-noise ratio thresholding is greater than after updating Lower OFDM subcarrier available signal-to-noise ratio thresholding is modulated equal to 16QAM；

16QAM modulates lower OFDM subcarrier available signal-to-noise ratio thresholding updating unit, for lower OFDM of QPSK modulation after updating When carrier wave available signal-to-noise ratio thresholding is more than or equal to OFDM subcarrier available signal-to-noise ratio thresholding under 16QAM is modulated, 16QAM modulation is updated Lower OFDM subcarrier available signal-to-noise ratio thresholding is the value increased after promoting the signal-noise ratio threshold factor；

Second thresholding judging unit, for judging that whether big 16QAM modulates lower OFDM subcarrier available signal-to-noise ratio thresholding after updating In the OFDM subcarrier available signal-to-noise ratio thresholding being equal under 64QAM modulation；

OFDM subcarrier available signal-to-noise ratio thresholding updating unit under 64QAM modulation, for the lower OFDM of 16QAM modulation after updating When subcarrier available signal-to-noise ratio thresholding is more than or equal to the OFDM subcarrier available signal-to-noise ratio thresholding under 64QAM modulation, 64QAM is updated OFDM subcarrier available signal-to-noise ratio thresholding under modulation is the value increased after promoting the signal-noise ratio threshold factor；

OFDM subcarrier available signal-to-noise ratio thresholding obtaining unit can use letter for obtaining OFDM subcarrier under each modulation system grade It makes an uproar and compares thresholding；

16QAM modulates lower OFDM subcarrier available signal-to-noise ratio threshold cell, is also used to when current modulation mode be 16QAM modulation When, updating 16QAM to modulate lower OFDM subcarrier available signal-to-noise ratio thresholding is the value increased after promoting the signal-noise ratio threshold factor；

OFDM subcarrier available signal-to-noise ratio thresholding updating unit under 64QAM modulation is also used to when current modulation mode be 64QAM When modulation, updating the OFDM subcarrier available signal-to-noise ratio thresholding under 64QAM modulation is after increasing the promotion signal-noise ratio threshold factor Value；

OFDM subcarrier available signal-to-noise ratio thresholding obtaining unit can use letter for obtaining OFDM subcarrier under each modulation system grade It makes an uproar and compares thresholding.