CN103002555A - Binary channel downgoing signal power compensation method and device and transmitter - Google Patents
Binary channel downgoing signal power compensation method and device and transmitter Download PDFInfo
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- CN103002555A CN103002555A CN2012105244041A CN201210524404A CN103002555A CN 103002555 A CN103002555 A CN 103002555A CN 2012105244041 A CN2012105244041 A CN 2012105244041A CN 201210524404 A CN201210524404 A CN 201210524404A CN 103002555 A CN103002555 A CN 103002555A
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Abstract
The invention provides a binary channel downgoing signal power compensation method and device and a transmitter. The binary channel downgoing signal power compensation device comprises a power determination module and a power compensation module. The transmitter comprises a remote radio module, the binary channel downgoing signal power compensation device and a signal conversion module. The binary channel downgoing signal power compensation method includes: respectively determining power of a first downgoing signal and a second downgoing signal; and if the power difference value of the first downgoing signal and the second downgoing signal is larger than or equal to a set threshold, performing power compensation on the signals low in power in the first downgoing signal and the second downgoing signal to enable the power difference value of the first downgoning signal and the second downgoing signal performed with power compensation to be lower than the set threshold. By means of the technical scheme, the binary channel downgoing signal power compensation method and device and the transmitter can ensure user and community handling capacity.
Description
Technical field
The present invention relates to the communication technology, relate in particular to a kind of binary channel downstream signal power compensating method, device and transmitter.
Background technology
Long Term Evolution (Long Term Evolution, LTE) system is the bearer network of high-speed data service.Yet more data service is occurred frequently in indoor scene, and in order to satisfy the user to the demand of high-speed data and multimedia service, indoor optical fiber distribution system is the major way that solves indoor covering in the LTE system.
In the prior art, multiple-input and multiple-output (Multiple-Input Multiple-Out-put, MIMO) technology is the effective capacity of LTE, the important means that improves service rate, in order to support the MIMO technology, the indoor optical fiber distribution system of LTE is by adopting the binary channel mode to expand MIMO up-downgoing capacity gain.Yet the binary channels downstream signal because each passive device and length of cable have larger difference, causes the imbalance of binary channels downstream signal power easily in transmission course, when binary channels downstream signal difference power is larger, will cause user and cell throughout to descend.
Summary of the invention
The invention provides a kind of binary channel downstream signal power compensating method, device and transmitter, to guarantee user and cell throughout.
For realizing purpose of the present invention, on the one hand, the invention provides a kind of binary channel downstream signal power compensating device, comprising: power determination module and power back-off module;
Described power determination module, for the power of determining respectively the first downstream signal and the second downstream signal, and whether the power difference of definite described the first downstream signal and described the second downstream signal is more than or equal to setting threshold;
Described power back-off module, determine that the power difference of described the first downstream signal and described the second downstream signal is more than or equal to described setting threshold if be used for described power determination module, then the little signal of power in determined described the first downstream signal of described power determination module and described the second downstream signal is carried out power back-off, so that the power difference of the first downstream signal after the power back-off and the second downstream signal is less than described setting threshold.
On the other hand, the present invention also provides a kind of transmitter, comprising: radio frequency remoto module, binary channel downstream signal power compensating device provided by the invention and signal conversion module;
Described radio frequency remoto module is for generation of the first downstream signal and the second downstream signal;
Described binary channel downstream signal power compensating device is used for described the first downstream signal and the little signal of described the second downstream signal power that described radio frequency remoto module produces are carried out power back-off;
Described signal conversion module is used for the first downstream signal after the described binary channel downstream signal power compensating device power back-off and the second downstream signal are carried out sending to receiving terminal after the signal conversion.
The present invention also provides a kind of binary channel downstream signal power compensating method, comprising:
Determine respectively the power of the first downstream signal and the second downstream signal;
If the power difference of described the first downstream signal and described the second downstream signal is more than or equal to setting threshold, then the little signal of power in described the first downstream signal and described the second downstream signal is carried out power back-off, so that the power difference of the first downstream signal after the power back-off and the second downstream signal is less than described setting threshold.
Technical scheme of the present invention determines that by the power determination module whether the first downstream signal that radio frequency remoto module sends and the second downstream signal power difference are more than or equal to setting threshold; And by the power back-off module signal that power is little in this first downstream signal and the second downstream signal is carried out power back-off, so that the power difference of the first downstream signal after the power back-off and the second downstream signal is less than setting threshold, to guarantee user and cell throughout.
Description of drawings
In order to be illustrated more clearly in the technical scheme in the embodiment of the invention, the below will do one to the accompanying drawing of required use among the embodiment and introduce simply, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation of the embodiment of binary channel downstream signal power compensating device provided by the invention;
Fig. 2 is the structural representation of the another embodiment of binary channel downstream signal power compensating device provided by the invention;
Fig. 3 is the structural representation of the another embodiment of binary channel downstream signal power compensating device provided by the invention;
Fig. 4 is the structural representation of the another embodiment of binary channel downstream signal power compensating device provided by the invention;
Fig. 5 is the structural representation of the embodiment of transmitter provided by the invention;
Fig. 6 is the flow chart of the embodiment of binary channel downstream signal power compensating method provided by the invention;
Fig. 7 is the flow chart of the another embodiment of binary channel downstream signal power compensating method provided by the invention.
Embodiment
For the purpose, technical scheme and the advantage that make the embodiment of the invention clearer, below in conjunction with the accompanying drawing in the embodiment of the invention, technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
Fig. 1 is the structural representation of the embodiment of binary channel downstream signal power compensating device provided by the invention, and as shown in Figure 1, the binary channel downstream signal power compensating device of present embodiment comprises: power determination module 1 and power back-off module 2;
Power determination module 1, for the power of determining respectively the first downstream signal and the second downstream signal, and whether the power difference of definite this first downstream signal and the second downstream signal is more than or equal to setting threshold;
Power back-off module 2, determine that the power difference of this first downstream signal and the second downstream signal is more than or equal to setting threshold if be used for this power determination module, then the little signal of power in determined this first downstream signal of this power determination module and the second downstream signal is carried out power back-off, so that the power difference of the first downstream signal after the power back-off and the second downstream signal is less than this setting threshold.
The embodiment of the invention is applicable to plurality of communication systems, for example: current 2G, 3G communication system and next generation communication system, global system for mobile communications (Global System for Mobile communications for example, GSM), code division multiple access (Code Division Multiple Access, CDMA) system, time division multiple access (Time Division Multiple Access, TDMA) system, Wideband Code Division Multiple Access (WCDMA) (Wideband Code Division Multiple Access Wireless, WCDMA), frequency division multiple access (Frequency Division Multiple Addressing, FDMA) system, OFDM (Orthogonal Frequency-Division Multiple Access, OFDMA) system, Single Carrier Frequency Division Multiple Access (SC-FDMA) system, GPRS (General Packet Radio Service, GPRS) system, Long Term Evolution (Long Term Evolution, LTE) system, and other these type of communication systems.
Below describe as an example of the LTE system example, in order to satisfy the user to the demand of high-speed data and multimedia service, indoor optical fiber distribution system is the major way that solves indoor covering in the LTE system.The indoor optical fiber distribution system of LTE can expand MIMO up-downgoing capacity gain by adopting the binary channel mode.
The first downstream signal of transmitting terminal and the second downstream signal are usually by radio frequency remoto module (Radio Remote Unit, RRU) send, the power of the first downstream signal and the second downstream signal is not identical, when if the difference of the power of this two paths of signals is larger, to cause user and cell throughout to descend, will have a strong impact on normally carrying out of customer service.
In the technical scheme of present embodiment, power determination module 1 is determined respectively the power of the first downstream signal and the second downstream signal, and whether the power difference of definite this first downstream signal and the second downstream signal is more than or equal to setting threshold; When the power difference of this first downstream signal and the second downstream signal during more than or equal to setting threshold, according to the power of high-power signal in this first downstream signal and the second downstream signal signal that wherein power is little is carried out power back-off by power back-off module 2, so that the power difference of this first downstream signal and the second downstream signal is less than this setting threshold, concrete, can increase the power of the little signal of power in this first downstream signal and the second downstream signal, make this first downstream signal identical with the power of the second downstream signal.For example, the power of the first downstream signal and the second downstream signal is respectively P1 and P2, and the power threshold of setting is P
Th, P1-P2〉and P
Th, then power back-off module 2 compensates the power P 2 of the second downstream signal according to P1, namely increases the power P 2 of the second downstream signal, makes P2=P1.Wherein, can adopt existing various power compensating method that the little signal of power in the first downstream signal and the second downstream signal is compensated, such as: power compensator or gain compensator etc., so that the power difference of the first downstream signal after the power back-off and the second downstream signal is less than this setting threshold, descend to stablize user and cell throughout, guarantee normally carrying out of customer service.
The binary channel downstream signal power compensating device that present embodiment provides determines that by the power determination module whether the first downstream signal that radio frequency remoto module sends and the second downstream signal power difference are more than or equal to setting threshold; And by the power back-off module signal that power is little in this first downstream signal and the second downstream signal is carried out power back-off, so that the power difference of the first downstream signal after the power back-off and the second downstream signal is less than setting threshold, to guarantee user and cell throughout.
Fig. 2 is the structural representation of the another embodiment of binary channel downstream signal power compensating device provided by the invention, on the basis of previous embodiment, the binary channel downstream signal power compensating device of present embodiment, power determination module 1 comprises: power decision device 11 and the first comparator 12;
Power decision device 11, be used for this first downstream signal and the high-power signal of the second downstream signal are exported this binary channel downstream signal power compensating device, this first downstream signal and the second downstream signal are inputted this power back-off module 2, and the power ratio of this first downstream signal and the second downstream signal is inputted the first input end I1 of the first comparator 12;
The first comparator 12, comprise first input end I1, the second input I2 and the first output O1, first input end I1 is used for this first downstream signal of received power decision device 11 inputs and the power ratio of described the second downstream signal high-power signal and low-power level signal, the second input I2 is used for input and sets fiducial value, the first output O1 is used for setting the first comparison signal of fiducial value to the power ratio of power back-off module 2 these first downstream signals of output and the second downstream signal and this, carries out power back-off with the little signal of power in 2 pairs of these the first downstream signals of power ratio control compensating module and the second downstream signal.
Power decision device 11 receives the binary channel downstream signal, power to this first downstream signal and the second downstream signal compares, and wherein high-power signal is exported binary channel downstream signal power compensating device of the present invention, the signal that wherein power is little will export power back-off module 2 to, to carry out power back-off during more than or equal to setting threshold when the power difference of this two paths of signals.Power decision device 11 also calculates the power ratio of high-power signal and low-power level signal in this first downstream signal and the second downstream signal, for example, the power of the first downstream signal and the second downstream signal is respectively P1 and P2, P1〉P2, power decision device 11 can calculate
Then this power ratio unit is decibel (Decibel, dB), and this power ratio is inputted the first input end I1 of the first comparator 12.After the first comparator 12 received this power ratio, relatively the size of the setting fiducial value of this ratio and the second input I2 input was exported the first comparison signal.This first comparison signal is used for 2 pairs of these the first downstream signals of power ratio control compensating module and the little signal of the second downstream signal power carries out power back-off, descends to stablize user and cell throughout, guarantees normally carrying out of customer service.
Preferably, as shown in Figure 3, power back-off module 2 can adopt following structure, specifically can comprise: the 3rd input I3, four-input terminal I4, the second output O2 and the first control end C1;
The 3rd input I3 is used for this first downstream signal and the high-power signal of the second downstream signal that received power decision device 11 is exported; Four-input terminal I4 is used for this first downstream signal and the little signal of the second downstream signal power that received power decision device 11 is exported;
The second output O2 is used for exporting the signal after the signal that four-input terminal I4 is inputted carries out power back-off;
The first control end C1 is used for receiving the first comparison signal that the first comparator 12 is exported.
The 3rd input I3 of power back-off module 2 and four-input terminal I4 input respectively high-power signal and the little signal of power in the two paths of signals, the first control end C1 receives the first comparison signal of the first comparator 12 outputs, and according to this first comparison signal the little signal of power that four-input terminal I4 inputs is carried out power back-off.The first comparison signal of the first comparator 12 outputs is high level, and then power back-off module 2 is carried out power back-off according to the power of the signal of the 3rd input I3 input to the signal that four-input terminal I4 inputs.
Better, as shown in Figure 3, binary channel downstream signal power compensating device provided by the invention also comprises: switch element 3 and non-gate cell 4; Switch element 3 comprises two links and the second control end C2; Non-gate cell 4 comprises the 5th input I5 and the 3rd output O3;
In two links of switch element 3 one is connected with four-input terminal I4, and another is connected with the second output O2; The second control end C2 is connected with the 3rd output O3;
The 3rd output O3 is for the reverse signal of output the first comparison signal;
The 5th input I5 is connected with the first output O1 of the first comparator 12;
Fig. 4 is the structural representation of the another embodiment of binary channel downstream signal power compensating device provided by the invention, on the basis of arbitrary embodiment of Fig. 2-shown in Figure 3, a kind of concrete feasible configurations of power decision device is provided in the present embodiment, and power decision device 11 can comprise: the second comparator 111, switches set 112 and arithmetic element 113; Arithmetic element 113 comprises the 6th input I6 and the 7th input I7; The structure of power decision device 11 only is shown among the figure as shown in Figure 4.
The second comparator 111 is used for the second comparison signal of this first downstream signal and the second downstream signal is inputed to switches set 112;
Switches set 112, be used for according to this second comparison signal and this first downstream signal and the second downstream signal, the 6th input I6 to arithmetic element 113 inputs high-power signal in this first downstream signal and the second downstream signal, inputs the little signal of power in this first downstream signal and the second downstream signal to the 7th input I7 of arithmetic element 113; Also be used for this first downstream signal and the second downstream signal power output decision device 11;
In the present embodiment, the first downstream signal and second downstream signal of 111 pairs of inputs of the second comparator the second comparator 111 compare, and obtain the second comparison signal, and input this second comparison signal to switches set 112.Switches set 112 can be comprised of one group of logic switch and non-gate cell, be used for according to this second comparison signal and this first downstream signal and the second downstream signal, relatively draw high-power signal and the little signal of power in this first downstream signal and the second downstream signal, and input to respectively the 6th input I6 and the 7th input I7 of arithmetic element 113; Also be used for this first downstream signal and the second downstream signal power output decision device 11.The switches set 113 that forms take the non-gate cell of 4 logic switches and is as example, as shown in Figure 4, the 8th input I8 and the 9th input I9 of the second comparator 111 input respectively this first downstream signal and the second downstream signal, the 8th input I8 is connected with the 7th input I7 with the 6th input I6 with the second logic switch S2 by the first logic switch S1 in the switches set 113 respectively, the 9th input I9 is connected with the 7th input I7 with the 6th input I6 with the 4th logic switch S4 by the 3rd logic switch S3 in the switches set 113 respectively, and the output of the second comparator 111 is connected with the control end of the first logic switch S1 and the 4th logic switch S4, and the output of the second comparator 111 is connected by the control end of a non-gate cell with the second logic switch S2 and the 3rd logic switch S3.If the power of this first downstream signal is greater than or equal to the power of this second downstream signal, then the output of the second comparator 111 will be exported high level, then the first logic switch S1 and the 4th logic switch S4 are with closure, the second logic switch S2 and the 3rd logic switch S3 will disconnect, then the first downstream signal will be inputted the 6th input I6, and the second downstream signal will be inputted the 7th input I7; Otherwise, the output of the second comparator 111 is with output low level, then the first logic switch S1 and the 4th logic switch S4 will disconnect, the second logic switch S2 and the 3rd logic switch S3 are with closure, then the first downstream signal will be inputted the 7th input I7, and the second downstream signal will be inputted the 6th input I6.The 6th input I6 that is arithmetic element 113 always inputs high-power signal in this first downstream signal and the second downstream signal, and the 7th input I7 always inputs the little signal of power in this first downstream signal and the second downstream signal.The power ratio of the 6th input I6 and the 7th input I7 input signal, the power ratio of the signal that namely high-power signal and power are little in this first downstream signal and the second downstream signal are calculated and exported to arithmetic element 113.For example, the power of the first downstream signal and the second downstream signal is respectively P1 and P2, P1〉P2, arithmetic element 113 can calculate
Then this power ratio unit is dB.
The technical scheme of present embodiment, by the first downstream signal of input and the power of the second downstream signal are compared, obtain the power ratio of the signal that high-power signal and power are little in this first downstream signal and the second downstream signal, carry out power back-off to be used for the lower-powered signal of this two paths of signals, make the power difference of the two paths of signals after the power back-off less than this setting threshold, descend to stablize user and cell throughout, guarantee normally carrying out of customer service.
Fig. 5 is the structural representation of the embodiment of transmitter provided by the invention, as shown in Figure 5, the transmitter of present embodiment comprises: binary channel downstream signal power compensating device 52 and the signal conversion module 53 described in radio frequency remoto module 51, the aforementioned arbitrary embodiment;
Radio frequency remoto module 51 is for generation of the first downstream signal and the second downstream signal;
Binary channel downstream signal power compensating device 52 is used for this first downstream signal and the little signal of the second downstream signal power that radio frequency remoto module 51 produces are carried out power back-off;
Transmitter provided by the invention, functions is similar to the embodiment of aforementioned binary channel downstream signal power compensating device provided by the invention in its concrete structure and the structure, repeats no more herein.
The transmitter of present embodiment, radio frequency remoto module 51 produces the first downstream signal and the second downstream signal, binary channel downstream signal power compensating device 52 carries out power back-off according to the power of high-power signal in this first downstream signal and the second downstream signal to the signal that wherein power is little, so that the power difference of this first downstream signal and the second downstream signal is less than this setting threshold, concrete, can increase the power of the little signal of power in this first downstream signal and the second downstream signal, make this first downstream signal identical with the power of the second downstream signal.53 of signal conversion module carry out sending to receiving terminal after the signal conversion to the first downstream signal after binary channel downstream signal power compensating device 52 power back-offs and the second downstream signal.By the signal that power is little in the two-way downstream signal is carried out power back-off, so that the power difference of the first downstream signal after the power back-off and the second downstream signal is less than this setting threshold, descend to stablize user and cell throughout, guarantee normally carrying out of customer service.
Preferably, signal conversion module 53 comprises: intermediate frequency converting unit 531, AD conversion unit 532 and electrooptic switching element 533;
Intermediate frequency converting unit 531 is used for this first downstream signal and the second downstream signal are carried out the intermediate frequency conversion, down-converts to respectively different frequency signals;
The transmitter that present embodiment provides, the little signal of power carries out power back-off in the first downstream signal that radio frequency remoto module is sent by binary channel downstream signal power compensating device and the second downstream signal, so that the power difference of the first downstream signal after the power back-off and the second downstream signal is less than setting threshold, through signal conversion module this two paths of signals finally is converted into light signal again and in optical fiber, transmits, guaranteed user and cell throughout.
Fig. 6 is the flow chart of the embodiment of binary channel downstream signal power compensating method provided by the invention, as shown in Figure 6, the binary channel downstream signal power compensating method of present embodiment can be carried out by binary channel downstream signal power compensating device provided by the invention, specifically may further comprise the steps:
S61: the power of determining respectively the first downstream signal and the second downstream signal;
S62: if the power difference of this first downstream signal and the second downstream signal is more than or equal to setting threshold, then the signal that power is little in this first downstream signal and the second downstream signal is carried out power back-off, so that the power difference of the first downstream signal after the power back-off and the second downstream signal is less than this setting threshold.
The embodiment of the invention is applicable to plurality of communication systems, for example: current 2G, 3G communication system and next generation communication system, gsm system for example, cdma system, tdma system, WCDMA system, the FDMA system, the OFDMA system, SC-FDMA system, gprs system, LTE system, and other these type of communication systems.
Below describe as an example of the LTE system example, in order to satisfy the user to the demand of high-speed data and multimedia service, indoor optical fiber distribution system is the major way that solves indoor covering in the LTE system.The indoor optical fiber distribution system of LTE can expand MIMO up-downgoing capacity gain by adopting the binary channel mode.
The first downstream signal and second downstream signal of transmitting terminal are sent by RRU usually, the power of the first downstream signal and the second downstream signal is not identical, when if the difference of the power of this two paths of signals is larger, will cause user and cell throughout to descend, will have a strong impact on normally carrying out of customer service.
In the technical scheme of present embodiment, determine respectively the power of the first downstream signal and the second downstream signal, and whether the power difference of definite this first downstream signal and the second downstream signal is more than or equal to setting threshold; When the power difference of this first downstream signal and the second downstream signal during more than or equal to this setting threshold, then the power according to high-power signal in this first downstream signal and the second downstream signal carries out power back-off to the signal that wherein power is little, for example, the power of the first downstream signal and the second downstream signal is respectively P1 and P2, and the power threshold of setting is P
Th, P1-P2〉and P
Th, then according to P1 the power of the second downstream signal is compensated, so that the power difference of the first downstream signal after the power back-off and the second downstream signal less than this setting threshold, descends to stablize user and cell throughout, guarantee normally carrying out of customer service.
Fig. 7 is the flow chart of the another embodiment of binary channel downstream signal power compensating method provided by the invention, as shown in the figure, on basis embodiment illustrated in fig. 7, if the power difference of described the first downstream signal of S62 and described the second downstream signal is more than or equal to setting threshold, then the little signal of power in described the first downstream signal and described the second downstream signal is carried out power back-off, comprising:
S71: power ratio and the setting fiducial value of this first downstream signal and the second downstream signal are compared;
S72: if this power ratio is set fiducial value more than or equal to this, then the signal that power is little in this first downstream signal and the second downstream signal is carried out power back-off, otherwise the signal that power is little in this first downstream signal and the second downstream signal is not carried out power back-off.
In the present embodiment, by calculating the power ratio of the signal that high-power signal and power are little in this first downstream signal and the second downstream signal, the size by this power ratio also can reflect difference power size in this first downstream signal and the second downstream signal.For example, the power of the first downstream signal and the second downstream signal is respectively P1 and P2, P1〉P2, can calculate
Value, then this power ratio unit is dB.This power ratio is set fiducial value more than or equal to this, illustrates that then the difference of this first downstream signal and the second downstream signal power is larger, will cause user and cell throughout to descend, and will have a strong impact on normally carrying out of customer service.Therefore the signal that power is little in this first downstream signal and the second downstream signal is carried out power back-off, otherwise, the difference of this first downstream signal and the second downstream signal power is less, and the unlikely user of impact and cell throughout then need not the signal that power is little in this first downstream signal and the second downstream signal is carried out power back-off.
Present embodiment is by the ratio and the size of setting fiducial value of the power of comparison the first downstream signal and the second downstream signal, determine whether lower-powered signal in this two paths of signals is carried out power back-off, with the power difference of this two paths of signals in the reasonable scope, descend to stablize user and cell throughout, guarantee normally carrying out of customer service.
One of ordinary skill in the art will appreciate that: all or part of step that realizes above-mentioned each embodiment of the method can be finished by the relevant hardware of program command.Aforesaid program can be stored in the computer read/write memory medium.This program is carried out the step that comprises above-mentioned each embodiment of the method when carrying out; And aforesaid storage medium comprises: the various media that can be program code stored such as ROM, RAM, magnetic disc or CD.
It should be noted that at last: above each embodiment is not intended to limit only in order to technical scheme of the present invention to be described; Although with reference to aforementioned each embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment puts down in writing, and perhaps some or all of technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the scope of various embodiments of the present invention technical scheme.
Claims (9)
1. a binary channel downstream signal power compensating device is characterized in that, comprising: power determination module and power back-off module;
Described power determination module, for the power of determining respectively the first downstream signal and the second downstream signal, and whether the power difference of definite described the first downstream signal and described the second downstream signal is more than or equal to setting threshold;
Described power back-off module, determine that the power difference of described the first downstream signal and described the second downstream signal is more than or equal to described setting threshold if be used for described power determination module, then the little signal of power in determined described the first downstream signal of described power determination module and described the second downstream signal is carried out power back-off, so that the power difference of the first downstream signal after the power back-off and the second downstream signal is less than described setting threshold.
2. device according to claim 1 is characterized in that, described power determination module comprises: power decision device and the first comparator;
Described power decision device, be used for described the first downstream signal and the high-power signal of described the second downstream signal are exported described device, described the first downstream signal and described the second downstream signal are inputted described power back-off module, and the power ratio of described the first downstream signal and described the second downstream signal is inputted the first input end of described the first comparator;
Described the first comparator, comprise first input end, the second input and the first output, described first input end is used for receiving described first downstream signal of described power decision device input and the power ratio of described the second downstream signal high-power signal and low-power level signal, described the second input is used for input and sets fiducial value, described the first output is used for exporting to described power back-off module the first comparison signal of power ratio and the described setting fiducial value of described the first downstream signal and described the second downstream signal, to control described power back-off module the little signal of power in described the first downstream signal and described the second downstream signal is carried out power back-off.
3. device according to claim 2 is characterized in that, described power back-off module comprises: the 3rd input, four-input terminal, the second output and the first control end;
Described the 3rd input is used for receiving described the first downstream signal and the high-power signal of described the second downstream signal that described power decision device is exported;
Described four-input terminal is used for receiving described the first downstream signal and the little signal of described the second downstream signal power that described power decision device is exported;
Described the second output is used for exporting the signal after the signal that described four-input terminal is inputted carries out power back-off;
Described the first control end is used for receiving described the first comparison signal that described the first comparator is exported.
4. device according to claim 3 is characterized in that, described device also comprises: switch element and non-gate cell; Described switch element comprises two links and the second control end; Described non-gate cell comprises the 5th input and the 3rd output;
In described two links one is connected with described four-input terminal, and another is connected with described the second output; Described the second control end is connected with described the 3rd output;
Described the 3rd output is for the reverse signal of exporting described the first comparison signal;
Described the 5th input is connected with the first output of described the first comparator;
Described switch element is used for closure under the control of the described reverse signal that described the 3rd output is exported, so that the second output output signal of described power back-off module is the signal of described four-input terminal input; Perhaps, under the control of the described reverse signal of described the 3rd output output, disconnect, so that the second output output signal of described power back-off module is carried out signal after the power back-off for the signal to described four-input terminal input.
5. each described device is characterized in that according to claim 2-4, and described power decision device comprises: the second comparator, switches set and arithmetic element; Described arithmetic element comprises the 6th input and the 7th input;
Described the second comparator is used for the second comparison signal of described the first downstream signal and described the second downstream signal is inputed to described switches set;
Described switches set, be used for according to described the second comparison signal and described the first downstream signal and described the second downstream signal, input high-power signal in described the first downstream signal and described the second downstream signal to described the 6th input of described arithmetic element, input the little signal of power in described the first downstream signal and described the second downstream signal to described the 7th input of described arithmetic element; Also be used for described the first downstream signal and described the second downstream signal are exported described power decision device;
Described arithmetic element is for the power ratio of calculating and export described the 6th input and described the 7th input input signal.
6. a transmitter is characterized in that, comprising: radio frequency remoto module, such as claim 1-5 each described binary channel downstream signal power compensating device and signal conversion module;
Described radio frequency remoto module is for generation of the first downstream signal and the second downstream signal;
Described binary channel downstream signal power compensating device is used for described the first downstream signal and the little signal of described the second downstream signal power that described radio frequency remoto module produces are carried out power back-off;
Described signal conversion module is used for the first downstream signal after the described binary channel downstream signal power compensating device power back-off and the second downstream signal are carried out sending to receiving terminal after the signal conversion.
7. transmitter according to claim 6 is characterized in that, described signal conversion module comprises: intermediate frequency converting unit, AD conversion unit and electrooptic switching element;
Described intermediate frequency converting unit is used for described the first downstream signal and described the second downstream signal are carried out the intermediate frequency conversion, down-converts to respectively different frequency signals;
Described AD conversion unit, being used for to be digital signal through the analog signal conversion after the frequency conversion of described intermediate frequency converting unit;
Described electrooptic switching element is used for the digital signal of described AD conversion unit output is converted to light signal.
8. a binary channel downstream signal power compensating method is characterized in that, comprising:
Determine respectively the power of the first downstream signal and the second downstream signal;
If the power difference of described the first downstream signal and described the second downstream signal is more than or equal to setting threshold, then the little signal of power in described the first downstream signal and described the second downstream signal is carried out power back-off, so that the power difference of the first downstream signal after the power back-off and the second downstream signal is less than described setting threshold.
9. method according to claim 8, it is characterized in that, if the power difference of described the first downstream signal and described the second downstream signal more than or equal to setting threshold, is then carried out power back-off to the little signal of power in described the first downstream signal and described the second downstream signal, comprising:
The power ratio of described the first downstream signal and described the second downstream signal is compared with the setting fiducial value;
If described power ratio is more than or equal to described setting fiducial value, then the little signal of power in described the first downstream signal and described the second downstream signal is carried out power back-off, otherwise the little signal of power in described the first downstream signal and described the second downstream signal is not carried out power back-off.
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| CN104427601A (en) * | 2013-08-29 | 2015-03-18 | 中国移动通信集团公司 | Method and device for adjusting channel power in two-channel indoor distribution system |
| CN108270493A (en) * | 2016-12-29 | 2018-07-10 | 瞻博网络公司 | For detecting and compensating for the unbalanced power of coherent light emitters and the faulty method and apparatus of modulation |
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| CN1520064A (en) * | 2003-01-07 | 2004-08-11 | Lg电子株式会社 | Phase mixing diversity receiver and method thereof |
| CN102687567A (en) * | 2009-10-02 | 2012-09-19 | 交互数字专利控股公司 | Method and apparatus for controlling transmit power of transmissions on more than one component carrier |
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| CN1520064A (en) * | 2003-01-07 | 2004-08-11 | Lg电子株式会社 | Phase mixing diversity receiver and method thereof |
| CN102687567A (en) * | 2009-10-02 | 2012-09-19 | 交互数字专利控股公司 | Method and apparatus for controlling transmit power of transmissions on more than one component carrier |
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| CN104427601A (en) * | 2013-08-29 | 2015-03-18 | 中国移动通信集团公司 | Method and device for adjusting channel power in two-channel indoor distribution system |
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