CN102573026A - Method for realizing automatic transfer power control of digital microwave transmission system - Google Patents
Method for realizing automatic transfer power control of digital microwave transmission system Download PDFInfo
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- CN102573026A CN102573026A CN2011104093853A CN201110409385A CN102573026A CN 102573026 A CN102573026 A CN 102573026A CN 2011104093853 A CN2011104093853 A CN 2011104093853A CN 201110409385 A CN201110409385 A CN 201110409385A CN 102573026 A CN102573026 A CN 102573026A
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Abstract
The invention relates to a method for realizing the automatic transfer power control (ATPC) of a digital microwave transmission system. The method comprises the following steps that: after an ATPC function of the digital microwave transmission system is enabled, a transmitter and a receiver of the microwave transmission system report own reception levels to the opposite end, monitor a transmission level value reported by the opposite end in real time, and determine a high reception level threshold and a low reception level threshold according to user settings. By the method, the influence of radio wave fading can be effectively avoided, system interference can be reduced, and the residual code error property of the system can be improved.
Description
Technical field
The present invention relates to a kind of method that realizes the automatic transmitting power control of digital microwave transmission system (ATPC).
Background technology
Nowadays,, comprise digital microwave telecommunication with the leading wireless communication system of mobile communication, wireless lan (wlan), live telecast service (DBS), Local Multipoint Distribute System (LMDS) and radio-frequency recognition system (RFID) etc. have obtained great development interior.The microwave communication technology plays an increasingly important role in entire wireless communication system.And perfect day by day along with digital microwave telecommunication, the update of microwave, power system capacity is increasing.Digital microwave telecommunication is to make a kind of means of communication that carrier transmits digital signal with microwave.He has the advantage of digital communication and microwave communication concurrently, characteristics such as capacity greatly, road convenience, long-distance transmission quality are stablized up and down, investment is little, the convenience of building a station.
In the digital microwave transmission system use, because the complexity of wireless transmission environment, the decline of link transmission can cause the instability of receiving end signal, even signal interruption.
Summary of the invention
The objective of the invention is to overcome the shortcoming of prior art, a kind of method that realizes the automatic transmitting power control of digital microwave transmission system is provided, can effectively overcome the influence of radio wave fading, reduce system interference, improve system residual error code mistake characteristic.
For solving above technical problem; Technical scheme of the present invention is: a kind of method that realizes the automatic transmitting power control of digital microwave transmission system; It is characterized in that this method comprises: after digital microwave transmission system ATPC function was opened, the opposite end was offered with the incoming level of oneself respectively in the transceiver two ends of microwave transmission system; The launching electrical level value of simultaneously opposite end being reported and submitted is monitored in real time, and according to the user definite incoming level high threshold and low threshold is set.
By above scheme, if be under the situation of minimum value, detect the opposite end incoming level and constantly weaken at the local terminal launching electrical level, be reduced to be lower than low threshold before, keeping the local terminal launching electrical level is that minimum value is constant; When Radio Link continue to worsen, cause the opposite end incoming level to be lower than low threshold, at this moment, start the launching electrical level control of local terminal, the amplitude that reduces by the opposite end incoming level increases the transmitting power of local terminal, keeps the opposite end incoming level on low threshold; Cause local terminal to continue to increase transmitting power until maximum when wireless environment continues to worsen, keep the local terminal transmitting power this moment is maximum.
By above scheme, when the wireless environment deterioration degree reduces, detect the opposite end incoming level and constantly strengthen, be strengthened to be higher than high threshold before, keep the local terminal transmitting power not change; When the wireless environment deterioration degree continue to reduce, detect the opposite end incoming level and constantly strengthen, be strengthened to be higher than high threshold after, the equivalent local terminal transmitting power that increases of amplitude according to the opposite end incoming level improves keeps the opposite end incoming level to maintain high threshold; Cause local terminal constantly to reduce transmitting power until minimum value when wireless environment continues to improve, keep the local terminal transmitting power this moment is minimum value.
By above scheme, said microwave transmitting and receiving letter two ends have formed closed control loop, and the radio-frequency module power output is changed from the variation of motion tracking receiving terminal level in transmitting power control range automatically.
The contrast prior art, beneficial features of the present invention is following:
1), this realizes the method for the automatic transmitting power control of digital microwave transmission system, effectively overcomes the influence of radio wave fading, reduces system interference, improves system residual error code mistake characteristic.
2), this realizes the method for the automatic transmitting power control of digital microwave transmission system, utilizes two thresholdings of incoming level height, has both kept incoming level within the scope that receives, and has reduced the frequency that transmitting power changes simultaneously, enhance system stability.
3), this realizes the method for the automatic transmitting power control of digital microwave transmission system, reduces digital microwave transmission system and uses difficulty, has reduced operating cost of operator, has improved the vitality of digital microwave transmission system largely.
Description of drawings
Fig. 1 realizes the method system block diagram of the automatic transmitting power control of digital microwave transmission system for the present invention.
Fig. 2 realizes the method ATPC control curve synoptic diagram of the automatic transmitting power control of digital microwave transmission system for the present invention.
Embodiment
In conjunction with the accompanying drawings the present invention is further explained below by the specific embodiment.
With reference to figure 1 and Fig. 2, concrete implementation procedure is:
The first step, B station ATPC module real-time sampling receiver incoming level value.
In second step, when link is in the deep fade state, this moment, system was in the ATPC runaway condition, and A station sender power places max, and B station incoming level was arranged in ATPC and started below the low threshold (Fig. 2 1.) this moment, and changed with the variation of dafing depth.
In the 3rd step, along with weakening of dafing depth, B station incoming level is increased to ATPC gradually and starts low threshold (among Fig. 2 1.), and this moment, A station transmitting power still be a high level, and B station incoming level increases to ATPC startup high threshold (among Fig. 2 2.) along with the minimizing of dafing depth.
The 4th step started high threshold (among Fig. 2 2.) when B station incoming level arrives ATPC, and system gets into ATPC loop-locking state.The link decline reduces when this moment; B station ATPC adapter produces the ATPC control signal, and this signal is delivered to modulator through microwave additional frame expense, and then oppositely is sent to the A station; Demodulator is told and is delivered to A station ATPC adapter through the A station; The ATPC adapter is resolved this control signal,, makes B station incoming level remain on ATPC and starts high threshold (among Fig. 2 2.) and locate to regulate transmitting power to the instruction of sender transmission power control.
In the 5th step, when dafing depth continues to reduce, B station received signal level increases thereupon.A station transmitter goes on foot the said transmitting power that gradually reduces to Min by the 4th.
Reverse procedure, when link declines the increase situation as follows:
In the 6th step, when link decline increase gradually, B stands, and received signal level is corresponding to be reduced.Before, B station transmitter still maintains minimum output power to start low threshold (among Fig. 2 1.) at no show ATPC.
The 7th step started low threshold (among Fig. 2 1.) when B station incoming level arrives ATPC, increased with link attenuation, and system gets into ATPC loop-locking state.A station transmitter will increase the sender transmitting power according to the ATPC instruction, locate thereby make B station incoming level remain on ATPC startup low threshold (among Fig. 2 1.).This process steps is said with reference to the 4th step.
In the 8th step, according to the 7th step, A station ATPC adapter will be regulated emission until A station sender maximum transmission power Max.If link attenuation continue to increase, then maximum transmission power is continued to keep in A station, and B station incoming level will be below ATPC starts low threshold (among Fig. 2 1.), and changes along with the variation that declines, and system is in the ATPC runaway condition.
More than be ATPC response overall process among the present invention, because the decline of link variation is at random, the operating state of system can repeat in above-mentioned eight steps at random.
Can know by above-mentioned steps, be provided with two thresholdings in the ATPC work, as among the figure 1. 2..Because the variation randomness of link; In order to reduce the frequency of ATPC to transmission power adjustment, and the sluggish scope that is provided with can be known by Fig. 2; The regulation sluggish scope 1. 2. in; Transmitting power will maintain on the former power level, and this has been avoided the frequent adjustment to sender to a certain extent, has protected the sender power amplifier.
Fig. 2 is that B stands to the transmitting power control at A station, and ATPC is two-way control, and the A station is controlled with above-mentioned all steps the ATPC at B station.
Above content is to combine concrete execution mode to the further explain that the present invention did, and can not assert that practical implementation of the present invention is confined to these explanations.For the those of ordinary skill of technical field under the present invention, under the prerequisite that does not break away from the present invention's design, can also make some simple deduction or replace, all should be regarded as belonging to protection scope of the present invention.
Claims (4)
1. method that realizes the control of the automatic transmitting power of digital microwave transmission system is characterized in that this method comprises:
After digital microwave transmission system ATPC function is opened; The opposite end is offered with the incoming level of oneself respectively in the transceiver two ends of microwave transmission system; The launching electrical level value of simultaneously opposite end being reported and submitted is monitored in real time, and according to the user definite incoming level high threshold and low threshold is set.
2. the method for the automatic transmitting power control of realization digital microwave transmission system as claimed in claim 1; It is characterized in that; If at the local terminal launching electrical level is under the situation of minimum value; Detect the opposite end incoming level and constantly weaken, be reduced to be lower than low threshold before, keeping the local terminal launching electrical level is that minimum value is constant; When Radio Link continue to worsen, cause the opposite end incoming level to be lower than low threshold, at this moment, start the launching electrical level control of local terminal, the amplitude that reduces by the opposite end incoming level increases the transmitting power of local terminal, keeps the opposite end incoming level on low threshold; Cause local terminal to continue to increase transmitting power until maximum when wireless environment continues to worsen, keep the local terminal transmitting power this moment is maximum.
3. the method for the automatic transmitting power control of realization digital microwave transmission system as claimed in claim 1 or 2; It is characterized in that,, detect the opposite end incoming level and constantly strengthen when the wireless environment deterioration degree reduces; Be strengthened to be higher than high threshold before, keep the local terminal transmitting power not change; When the wireless environment deterioration degree continue to reduce, detect the opposite end incoming level and constantly strengthen, be strengthened to be higher than high threshold after, the equivalent local terminal transmitting power that increases of amplitude based on the opposite end incoming level improves keeps the opposite end incoming level to maintain high threshold; Cause local terminal constantly to reduce transmitting power until minimum of a value when wireless environment continues to improve, keep the local terminal transmitting power this moment is minimum of a value.
4. the method for the automatic transmitting power control of realization digital microwave transmission system as claimed in claim 1; It is characterized in that: said microwave transmitting and receiving letter two ends have formed closed control loop, and the radio-frequency module power output is changed from the variation of motion tracking receiving terminal level in transmitting power control range automatically.
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| CN201110409385.3A CN102573026B (en) | 2011-12-12 | 2011-12-12 | Method for realizing automatic transfer power control of digital microwave transmission system |
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| CN201110409385.3A CN102573026B (en) | 2011-12-12 | 2011-12-12 | Method for realizing automatic transfer power control of digital microwave transmission system |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101461200A (en) * | 2006-05-26 | 2009-06-17 | 日本电气株式会社 | Wireless communication device, wireless communication system and wireless communication method |
| CN101478815A (en) * | 2008-12-15 | 2009-07-08 | 华为技术有限公司 | Transmission apparatus, signal transmitting control method and control apparatus thereof in microwave system |
| CN101911625A (en) * | 2008-01-24 | 2010-12-08 | 日本电气株式会社 | Radio transmission device, method for determining modulation system, and recording medium therefor |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101461200A (en) * | 2006-05-26 | 2009-06-17 | 日本电气株式会社 | Wireless communication device, wireless communication system and wireless communication method |
| CN101911625A (en) * | 2008-01-24 | 2010-12-08 | 日本电气株式会社 | Radio transmission device, method for determining modulation system, and recording medium therefor |
| CN101478815A (en) * | 2008-12-15 | 2009-07-08 | 华为技术有限公司 | Transmission apparatus, signal transmitting control method and control apparatus thereof in microwave system |
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Address after: 430205 Hubei city of Wuhan province Jiangxia Hidden Dragon Island Tan lake two Road No. 1 Patentee after: CITIC Mobile Communication Technology Co., Ltd Address before: 430074 Hubei city of Wuhan province East Lake high tech Development Zone No. 5 Dongxin Fiberhome 4 floor Patentee before: Wuhan Hongxin Telecommunication Technologies Co.,Ltd. |
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Address after: 430205 No.1 tanhu 2nd Road, Canglong Island, Jiangxia District, Wuhan City, Hubei Province Patentee after: CITIC Mobile Communication Technology Co.,Ltd. Address before: 430205 No.1 tanhu 2nd Road, Canglong Island, Jiangxia District, Wuhan City, Hubei Province Patentee before: CITIC Mobile Communication Technology Co., Ltd |
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