CN101674126B - Compound uplink power control method of multi-frequency time division multiple access satellite communication system - Google Patents

Compound uplink power control method of multi-frequency time division multiple access satellite communication system Download PDF

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CN101674126B
CN101674126B CN2009100756094A CN200910075609A CN101674126B CN 101674126 B CN101674126 B CN 101674126B CN 2009100756094 A CN2009100756094 A CN 2009100756094A CN 200910075609 A CN200910075609 A CN 200910075609A CN 101674126 B CN101674126 B CN 101674126B
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satellite communication
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noise ratio
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郝学坤
孙晨华
李冬浩
赵丽辉
李辉
吴果
刘冀
陈杰
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CETC 54 Research Institute
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract

The invention discloses a compound uplink power control method of a multi-frequency time division multiple access satellite communication system, which relates to a power control technology in the field of satellite communication. The compound uplink power control method adopts a compound uplink power control technology, thereby being capable of effectively ensuring the stable and reliable link communication quality under the communication of a mesh networking and effectively solving the power adjustment problem during the rapid change of the link quality caused by the communication of the hybrid mesh networking of a big earth station and a small earth station, the rain attenuation and the like. The compound uplink power control method has the advantages of automatic estimation of initial sending power, stable and reliable network access, capability of rapidly tracking the link attenuation and the like. The compound uplink power control method is especially applicable to the multi-frequency time division multiple access mesh network system which is based on a satellite transparent transponder for communication.

Description

A kind of compound uplink power control method of multi-frequency time division multiple access satellite communication system
Technical field
The present invention relates to the ascending power control method in multi-frequency time division multiple access (MF-TDMA) satellite communication field, be specially adapted to carry out uplink power control in the netted group network system of MF-TDMA based on the communication of satellite Transparent Transponder.
Background technology
The MF-TDMA satellite communication system has access and exchange capacity flexibly; Flexible net structure and virtual subnet ability; Satellite resource utilance and extension of network ability efficiently; It in can satisfying preferably group-net communication between the user who leads; At home and abroad be widely used gradually in the satellite communication, it is a kind of two-dimentional multi-access mode that frequency division and time-division combine that adopts, and utilizes frequency hopping transmission and reception, variable Rate and virtual circuit technology can realize the flexible networking of big or small terminal room to class of business and site type.
Yet because the MF-TDMA satellite communication system is easy to carry out dilatation through the expansion carrier number, and the different rates through each carrier wave is set is to support a large amount of different big or small type earth stations with net work.When earth station networked, the inaccurate meeting of initial transmission power caused being difficult to networking or interior other station operate as normal of influence net.When network size was big, dissimilar stations and regional climate environment etc. had influence on the normal reception with reference to burst, and main website needs accurately controlling with reference to the power of burst.In the netted group-net communication, the communication link environmental change differs greatly, and need to solve the fast-changing uplink transmission power control problem that can adaptive channel decays.
Summary of the invention
Technical problem to be solved by this invention is to avoid the weak point in the above-mentioned background technology and compound uplink power control method that the reliable MF-TDMA satellite communication system of a kind of group-net communication steady quality is provided.The present invention uses the ascending power control method of design; Can effectively guarantee link communication quality reliable and stable under the netted group-net communication, and efficiently solve big or small earth station and mix that netted group-net communication and rain decline etc. and cause the power adjustment problem when link-quality changes fast.The present invention has automatic estimation initial transmission power, saves manual operation, avoids netting interior interference simultaneously; The network operation is reliable and stable; Can adapt to characteristics such as the quick variation of link-quality.
The objective of the invention is to realize like this, comprise step:
1. the professional station of each satellite communication is estimated the initial transmission power at the professional station of satellite communication according to signal to noise ratio and the satellite communication main website main website state information through carrying with reference to burst of the reference burst that receives the transmission of satellite communication main website according to presetting algorithm automatically;
2. the professional station of each satellite communication is according to the professional station of the satellite communication carrier wave on duty of living in of each big or small type in each time division multiple access carriers rate and the net, according to presetting the transmitted power of the automatic precompensation of algorithm on each time division multiple access carrier wave;
3. the reference burst signal to noise ratio that the professional station of the satellite communication of each big or small type receives in the satellite communication main website collecting net according to the presetting rule classification processing, confirms that the satellite communication main website sends the power adjustment with reference to burst;
4. the professional station of each satellite communication receives the data burst signals that our station sends, and obtains the signal to noise ratio of data burst signals; The signal to noise ratio of calculated data burst with preset the difference of signal-noise ratio threshold value, according to the size of difference with preset algorithm, obtain the adjustment step-length of our station transmitted power, according to adjustment step-length adjustment transmitted power;
Carry out the control of multi-frequency time division multiple access satellite communication system compound uplink power.
The present invention the 1. algorithm that presets described in the step does
P i _ T = P M _ T · G M _ T G S _ T × 10 ( ( E b / N 0 ) mod - ( E b / N 0 ) S _ R ) / 10 - - - ( 1 )
P in the formula (1) I_TBe the initial transmission power at the professional station of satellite communication, unit is watt; P M_TBe the transmitted power of satellite communication main website, unit is watt; G M_TAntenna transmission gain for the satellite communication main website; G S_TAntenna transmission gain for the professional station of satellite communication; (E b/ N 0) ModBe the signal to noise ratio work thresholding at the professional station of satellite communication, unit is dB; (E b/ N 0) S_RFor the professional station of satellite communication receives the signal to noise ratio of the reference burst of satellite communication main website transmission, unit is dB.
The present invention the 2. algorithm that presets described in the step does
Δ D S _ C = 10 lg ( R slave _ else R slave ) + η S _ C , - - - ( 2 )
Δ D in the formula (2) S_CBe carrier wave transmitted power pre-compensation value; R SlaveFor the professional station of satellite communication the speed of carrier wave on duty; R Slave_elseCarriers rate for the professional station of satellite communication precompensation carrier wave transmitted power; η S_CModifying factor for precompensation carrier wave transmitted power carrier wave.
The present invention the 4. algorithm that presets described in the step does
Figure G2009100756094D00033
P in the formula (3) AdjustBe transmitted power adjustment step-length, unit is dB; (E b/ N 0) DATAThe signal to noise ratio of the data burst signals that the reception our station of standing for satellite communication is professional sends, unit is dB; (E b/ N 0) ModBe the signal to noise ratio work thresholding at the professional station of satellite communication, unit is dB.
The present invention compares background technology and has following advantage:
1, the present invention is according to satellite communication main website parameter, our station parameter with preset algorithm, realizes that initial transmission power estimates that automatically it is reliable and stable to network.
2, satellite communication of the present invention main website has improved the reliability of the network operation to reference to the controlling according to presetting algorithm of burst power.
3, the present invention adopts variable step power adjustment technology, can adapt to the communication under the quick situation of change of link attenuation.
Description of drawings
Fig. 1 is a workflow diagram of the present invention.
Fig. 2 is a multicarrier frame structure sketch map of the present invention.
Embodiment
With reference to Fig. 1, Fig. 2; The present invention includes 1, the professional station of each satellite communication initial transmission power estimates automatically; 2, each intercarrier transmitted power precompensation; 3, the satellite communication main website with reference to the burst signal to noise ratio confirm confirm 4, the professional station of each satellite communication data burst signals signal-to-noise ratio (snr) estimation, 5, the adjustment of variable step transmitted power.
The satellite communication main website comprises that through issuing the our station parameter information with reference to burst transmitting antenna gain, power amplifier gain, our station receive the Signal-to-Noise of reference etc.Each star communication service station receives the reference burst that the satellite communication main website sends; According to the satellite communication master information that receives, receive antenna gain with reference to burst signal to noise ratio and receiving earth station, power amplifier gain etc., according to the initial transmission power of given method estimation our station.
The MF-TDMA satellite communication system is for adapting to the demand of dissimilar earth station group-net communications, and the speed of each carrier wave is different.According to interoperation relationships and carriers rate, precompensation is transmitted power of burst respectively when sending signal for earth station.
Set the thresholding of all kinds of burst quality of earth station.Each earth station reports the reference burst quality situation that main website receives, and main website is based on the situation of all kinds of earth stations report and shared percentage etc., raise accordingly or downward modulation with reference to the transmitted power of burst.
In normal course of communications; Utilize the carrier wave saltus step of MF-TDMA satellite communication system to send and the characteristics that receive and carrier wave on duty is provided with; Each earth station can monitor the burst that the part our station sends to other station; The multicarrier frame structure is as shown in Figure 2, and Fig. 2 is a multicarrier frame structure sketch map of the present invention.The our station signal that each earth station utilization monitors, the estimating signal quality compares the acquisition difference with thresholding, selects suitable step-length to carry out the transmitted power adjustment then.Detect the effect that transmitted power is adjusted through closed-loop fashion, proceed the adjustment of variable step transmitted power according to effect then.
Workflow of the present invention is as shown in Figure 1, and Fig. 1 is a workflow diagram of the present invention, comprises that step is following:
1. the professional station of each satellite communication is estimated the initial transmission power at the professional station of satellite communication according to signal to noise ratio and the satellite communication main website main website state information through carrying with reference to burst of the reference burst that receives the transmission of satellite communication main website according to presetting algorithm automatically.The present invention of this step presets algorithm
P i _ T = P M _ T · G M _ T G S _ T × 10 ( ( E b / N 0 ) mod - ( E b / N 0 ) S _ R ) / 10 - - - ( 1 )
P in the formula (1) I_TBe the initial transmission power at the professional station of satellite communication, unit is watt; P M_TBe the transmitted power of satellite communication main website, unit is watt; G M_TAntenna transmission gain for the satellite communication main website; G S_TAntenna transmission gain for the professional station of satellite communication; (E b/ N 0) ModBe the signal to noise ratio work thresholding at the professional station of satellite communication, unit is dB; (E b/ N 0) S_RFor the professional station of satellite communication receives the signal to noise ratio of the reference burst of satellite communication main website transmission, unit is dB.
2. the professional station of each satellite communication is according to the professional station of the satellite communication carrier wave on duty of living in of each big or small type in each TDMA carriers rate and the net, according to presetting the transmitted power of the automatic precompensation of algorithm on each TDMA carrier wave; The present invention of this step presets algorithm
Δ D S _ C = 10 lg ( R slave _ else R slave ) + η S _ C - - - ( 2 )
Δ D in the formula (2) S_CBe carrier wave transmitted power pre-compensation value; R SlaveFor the professional station of satellite communication the speed of carrier wave on duty; R Slave_elseCarriers rate for the professional station of satellite communication precompensation carrier wave transmitted power; η S_CModifying factor for precompensation carrier wave transmitted power carrier wave.
3. the reference burst signal to noise ratio that the professional station of the satellite communication of each big or small type receives in the satellite communication main website collecting net according to the presetting rule classification processing, confirms that the satellite communication main website sends the power adjustment with reference to burst.The embodiment presetting rule is that the power adjustment that the satellite communication main website sends with reference to burst is to reduce 0.5dB when being higher than threshold value 3dB above the professional reception of standing of 10% satellite communication with reference to the signal to noise ratio that happens suddenly; When the professional station reception of the satellite communication above 30% was lower than threshold value 1dB with reference to the signal to noise ratio that happens suddenly, the power adjustment that the satellite communication main website sends with reference to burst was rise 0.5dB.
4. the professional station of each satellite communication receives the data burst signals that our station sends, and obtains the signal to noise ratio of data burst signals; The signal to noise ratio of calculated data burst with preset the difference of signal-noise ratio threshold value, according to the size of difference with preset algorithm, obtain the adjustment step-length of our station transmitted power, according to adjustment step-length adjustment transmitted power; The present invention of this step presets algorithm
Figure G2009100756094D00071
P in the formula (3) AdjustBe transmitted power adjustment step-length, unit is dB; (E b/ N 0) DATAThe signal to noise ratio of the data burst signals that the reception our station of standing for satellite communication is professional sends, unit is dB; (E b/ N 0) ModBe the signal to noise ratio work thresholding at the professional station of satellite communication, unit is dB.
Carry out the control of multi-frequency time division multiple access satellite communication system compound uplink power.

Claims (1)

1. compound uplink power control method of multi-frequency time division multiple access satellite communication system is characterized in that comprising step:
1. the professional station of each satellite communication is estimated the initial transmission power at the professional station of satellite communication according to signal to noise ratio and the satellite communication main website main website state information through carrying with reference to burst of the reference burst that receives the transmission of satellite communication main website according to presetting algorithm automatically;
2. the professional station of each satellite communication is according to the professional station of the satellite communication carrier wave on duty of living in of each big or small type in each time division multiple access carriers rate and the net, according to presetting the transmitted power of the automatic precompensation of algorithm on each time division multiple access carrier wave;
3. the reference burst signal to noise ratio that the professional station of the satellite communication of each big or small type receives in the satellite communication main website collecting net according to the presetting rule classification processing, confirms that the satellite communication main website sends the power adjustment with reference to burst;
4. the professional station of each satellite communication receives the data burst signals that our station sends, and obtains the signal to noise ratio of data burst signals; The signal to noise ratio of calculated data burst with preset the difference of signal-noise ratio threshold value, according to the size of difference with preset algorithm, obtain the adjustment step-length of our station transmitted power, according to adjustment step-length adjustment transmitted power;
Wherein, the 1. the algorithm that presets described in the step do
P in the formula (1) I_TBe the initial transmission power at the professional station of satellite communication, unit is watt; P M_TBe the transmitted power of satellite communication main website, unit is watt; G M_TAntenna transmission gain for the satellite communication main website; G S_TAntenna transmission gain for the professional station of satellite communication; (E b/ N 0) ModBe the signal to noise ratio work thresholding at the professional station of satellite communication, unit is dB; (E b/ N 0) S_RFor the professional station of satellite communication receives the signal to noise ratio of the reference burst of satellite communication main website transmission, unit is dB;
Wherein, the 2. the algorithm that presets described in the step do
Figure FSB00000781971400021
Δ D in the formula (2) S_CBe carrier wave transmitted power pre-compensation value; R SlaveFor the professional station of satellite communication the speed of carrier wave on duty; R Slave_elseCarriers rate for the professional station of satellite communication precompensation carrier wave transmitted power; η S_CModifying factor for precompensation carrier wave transmitted power carrier wave;
Wherein, the 4. the algorithm that presets described in the step do
Figure FSB00000781971400022
P in the formula (3) AdjustBe transmitted power adjustment step-length, unit is dB; (E b/ N 0) DATAThe signal to noise ratio of the data burst signals that the reception our station of standing for satellite communication is professional sends, unit is dB; (E b/ N 0) ModBe the signal to noise ratio work thresholding at the professional station of satellite communication, unit is dB;
Accomplish the control of multi-frequency time division multiple access satellite communication system compound uplink power.
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CN101902808B (en) * 2010-05-21 2013-03-06 南京邮电大学 Uplink self-adaptive closed loop power control method for satellite communication system
CN103067068A (en) * 2012-12-06 2013-04-24 熊猫电子集团有限公司 Financial satellite communication system multimode earth station continuing control method
CN105578409B (en) * 2015-12-18 2020-03-17 航天恒星科技有限公司 Terminal transmitting power adjusting method based on multi-beam satellite communication system
CN107317619A (en) * 2017-06-08 2017-11-03 南京邮电大学 One kind is declined based on Webview and rain compensates shipborne satellite communication system and method
CN108123761A (en) * 2017-12-21 2018-06-05 中国电子科技集团公司第五十四研究所 A kind of test of satellite communication earth station power reference value and computational methods
CN109041191A (en) * 2018-10-17 2018-12-18 成都国恒空间技术工程有限公司 A kind of back Poewr control method of FDMA system radial network

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