CN105978640A - Modulation coding threshold value dynamic decision method in microwave transmission network - Google Patents
Modulation coding threshold value dynamic decision method in microwave transmission network Download PDFInfo
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- CN105978640A CN105978640A CN201610223209.3A CN201610223209A CN105978640A CN 105978640 A CN105978640 A CN 105978640A CN 201610223209 A CN201610223209 A CN 201610223209A CN 105978640 A CN105978640 A CN 105978640A
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 10
- 238000005259 measurement Methods 0.000 claims abstract description 11
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
- H04B17/318—Received signal strength
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
- H04B17/336—Signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/02—Arrangements for optimising operational condition
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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Quality & Reliability (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Detection And Prevention Of Errors In Transmission (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Abstract
The invention discloses a method for dynamically adjusting multi-user modulation coding threshold value in a microwave transmission network, which comprises the following steps: setting a uniform initial modulation coding threshold value of each user; respectively recording the signal-to-noise ratio, the field intensity and the error rate fed back by the on-line users, simultaneously counting the signal-to-noise ratio fluctuation range, the field intensity fluctuation range and the error rate in a measurement window through a weight formula, then calculating an environment increment according to an environment increment weight formula X = alpha M + beta N + gamma Q, and finally adding the environment increment on the basis of the initial modulation coding threshold value as the current modulation coding threshold value. The method solves the problem that the modulation coding threshold value cannot be dynamically decided for each access user, and avoids the phenomena of modulation coding fluctuation and error rate increase caused by the fact that the modulation coding threshold value is not suitable under the environment of severe change of the user.
Description
Technical field
The present invention relates to wireless communication field, particularly relate to the decision method of modulating-coding threshold value in a kind of microwave transmission network.
Background technology
Along with developing rapidly of wireless communication technology, microwave transport equipment is widely applied to military affairs, civilian every field.But in microwave current transmission network, modulating-coding threshold value often sets initial, simultaneously cannot access user for each and carry out dynamic decision, often lead to that certain customers' modulating-coding threshold value in the environment of acute variation is improper causes modulating-coding to fluctuate back and forth, the bit error rate raises.
It is thus desirable to a kind of method dynamically adjusting user's threshold value for the feature of transmission channel in microwave transmission network, the method can solve the problem that above-mentioned relevant issues.
Summary of the invention
It is an object of the invention to provide a kind of in microwave transmission network, the method dynamically adjusting multi-user's modulating-coding threshold value, it is to avoid the bit error rate caused owing to threshold value is improper in the environment of acute variation rises.
The present invention proposes the decision method of modulating-coding threshold value in a kind of microwave transmission network, including following job step:
Step A: set the initial modulation coded gates limit value that each user is unified；
Step B: carry out record respectively according to signal to noise ratio, field intensity and the bit error rate that networked users feed back to, counted the signal to noise ratio fluctuation range in measurement window, field strength fluctuation scope, the bit error rate by weights formula simultaneously, then according to environment increment weights formula X=α * M+ β * N+ γ * Q, calculate environment increment, on the basis of initial modulation coded gates limit value, finally add that environment increment is as current modulating-coding threshold value；
For the processing procedure of step B, comprise the following steps:
Step B1: the channel quality of user detected；
Step B2: make a distinction the channel quality parameter of user, processes respectively to every kind of channel quality parameter；
Step B3: record respectively and channel quality parameter signal to noise ratio, field intensity and the bit error rate distinguished are processed respectively；
Step B4: calculate signal to noise ratio undulating value M, total bit error rate N and field strength fluctuation value Q in measurement window respectively；
Step B5: calculating threshold value increment X by weights formula X=α * M+ β * N+ γ * Q, wherein α, β, γ are the weight percentage of each judgement foundation respectively；
Step B6: to initial threshold plus current judging threshold as this user after increment X.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of threshold value decision making process.
Detailed description of the invention
For making objects and advantages of the present invention clearer, the present invention is further detailed explanation with example below in conjunction with the accompanying drawings.
Fig. 1 is threshold value decision-making mechanism flow process, and this decision process is that each UE is respectively directed to present channel environment modifies to initial threshold decision value, increases user's adaptation ability for fluctuation environment, and this flow process includes:
Step 101: receive the channel quality feedback information of user；
Step 102: channel quality feedback information is made a distinction process, if signal to noise ratio parameter so enters step 103, if the bit error rate, then enter step 104, if field intensity, then enter step 105；
Step 103: the signal to noise ratio parameter in measurement window is all recorded；
Step 104: the bit error rate in measurement window is all recorded;
Step 105: the field intensity value in measurement window is all recorded；
Step 106: calculate measurement window signal to noise ratio undulating value M by weights formula；
Step 107: calculate measurement window total bit error rate N；
Step 108: calculate measurement window field strength fluctuation value Q by weights formula；
Step 109: calculate modulating-coding threshold value increment X according to weights company X=α * M+ β * N+ γ * Q；
Step 110: plus increment X as judgement foundation on the basis of initial threshold.
Illustrate how to utilize weights formula calculate weights and compare below by an example.nullCurrent 16QAM1/2 threshold value is signal to noise ratio 22db，Field strength range is-30 to-70dbm,Signal to noise ratio fluctuation range is 0.5，Field strength fluctuation scope is 0.2，The bit error rate is 0.05，The impact of channel quality is determined by the decision basis of weight percentage，It is set to 1 by affecting minimum field strength fluctuation scope weight，Then signal to noise ratio fluctuation range weight is set to 5 times of field strength fluctuation scope，It is set to 5，The bit error rate is the most key on channel quality impact，It is set to 5 times of signal to noise ratio fluctuation range weight，It is set to 25，By weights formula X=5*0.2+25*0.05+1*0.2，Being calculated threshold value increment is 2.25，The newest 16QAM1/2 threshold value is signal to noise ratio (22+2.25) db，Field strength range is that (-30-2.25) arrives (-70+2.25) dbm.
In sum, these are only the preferred embodiments of the present invention, be not intended to limit protection scope of the present invention.All within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. made, should be included within the scope of the present invention.
Claims (1)
1. modulating-coding threshold value dynamic decision method in a microwave transmission network, it is characterised in that set system initial threshold as P0, different user, according to channel conditions, completes threshold value increment (X) dynamic decision in measurement window, it is thus achieved that up-to-date threshold value P=P0+ X, changes according to this new threshold value decision-making modulation coding mode；Modulating-coding threshold value dynamic decision step is as follows:
Step 1: calculate signal to noise ratio undulating value M, total bit error rate N and field strength fluctuation value Q in measurement window respectively；
Step 2: calculate modulating-coding threshold value increment X by weights formula X=α * M+ β * N+ γ * Q, wherein α, β, γ are the weight percentage of each judgement foundation respectively, weight percentage determines according on the impact of channel quality, influence degree is the bit error rate > signal to noise ratio > field intensity, combine with test according to theory, may determine that α=5, β=25, γ=1, actually used in can adjust the value of α, β, γ according to the little scope of scene；
Step 3: according to formula P=P0+ X, it is thus achieved that up-to-date threshold value, the modulation coding mode of this user selects to be determined by this new threshold value；
Pass through said method, it is achieved the method for modulating-coding threshold value decision-making in Microwave Net.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110555965A (en) * | 2018-05-30 | 2019-12-10 | 立积电子股份有限公司 | Method, apparatus and processor readable medium for detecting the presence of an object in an environment |
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| EP1128574A2 (en) * | 2000-02-28 | 2001-08-29 | Lucent Technologies Inc. | Reverse link outer loop power control |
| CN101483501A (en) * | 2009-02-20 | 2009-07-15 | 北京北方烽火科技有限公司 | Method for adaptively regulating modulation encoding mode based on CINR |
| CN102694608A (en) * | 2012-05-22 | 2012-09-26 | 广西师范大学 | Method and device for preferable selection of transmission techniques of transceiving equipment of wireless mobile communication system |
| CN103874109A (en) * | 2012-12-12 | 2014-06-18 | 普天信息技术研究院有限公司 | Adjustment method of channel transmission demodulation threshold |
| CN104426628A (en) * | 2013-08-28 | 2015-03-18 | 普天信息技术有限公司 | Threshold adjusting method and system of modulation coding mode |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1128574A2 (en) * | 2000-02-28 | 2001-08-29 | Lucent Technologies Inc. | Reverse link outer loop power control |
| CN101483501A (en) * | 2009-02-20 | 2009-07-15 | 北京北方烽火科技有限公司 | Method for adaptively regulating modulation encoding mode based on CINR |
| CN102694608A (en) * | 2012-05-22 | 2012-09-26 | 广西师范大学 | Method and device for preferable selection of transmission techniques of transceiving equipment of wireless mobile communication system |
| CN103874109A (en) * | 2012-12-12 | 2014-06-18 | 普天信息技术研究院有限公司 | Adjustment method of channel transmission demodulation threshold |
| CN104426628A (en) * | 2013-08-28 | 2015-03-18 | 普天信息技术有限公司 | Threshold adjusting method and system of modulation coding mode |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110555965A (en) * | 2018-05-30 | 2019-12-10 | 立积电子股份有限公司 | Method, apparatus and processor readable medium for detecting the presence of an object in an environment |
| CN110555965B (en) * | 2018-05-30 | 2022-01-11 | 立积电子股份有限公司 | Method, apparatus and processor readable medium for detecting the presence of an object in an environment |
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