CN103002555B - 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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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, particularly relate 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.But more data service is occurred frequently in indoor scene, in order to meet the demand of user to high-speed data and multimedia service, indoor optical fiber distribution system is the major way solving in-door covering in LTE system.
In prior art, multiple-input and multiple-output (Multiple-Input Multiple-Out-put, MIMO) technology is the effective capacity of LTE, the important means improving service rate, in order to support MIMO technology, the indoor optical fiber distribution system of LTE expands MIMO up-downgoing capacity gain by adopting binary channel mode.But binary channels downstream signal, in transmitting procedure, because each passive device and length of cable have larger difference, easily causes the imbalance of binary channels downstream signal power, when binary channels downstream signal difference power is larger, user and cell throughout will be caused to decline.
Summary of the invention
The invention provides a kind of binary channel downstream signal power compensating method, device and transmitter, to ensure user and cell throughout.
For realizing object 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 compensation module;
Described power determination module, for determining the power of the first downstream signal and the second downstream signal respectively, and determines whether the power difference of described first downstream signal and described second downstream signal is more than or equal to setting threshold;
Described power compensation module, if determine that the power difference of described first downstream signal and described second downstream signal is more than or equal to described setting threshold for described power determination module, then little to power in determined described first downstream signal of described power determination module and described second downstream signal signal carries out power back-off, is less than described setting threshold to make the power difference of the first downstream signal after power back-off and the second downstream signal.
On the other hand, present invention also offers 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, for generation of the first downstream signal and the second downstream signal;
Described binary channel downstream signal power compensating device, the signal little for power in described first downstream signal that produces described radio frequency remoto module and described second downstream signal carries out power back-off;
Described signal conversion module, sends to receiving terminal after carrying out signal conversion to the first downstream signal after described binary channel downstream signal power compensating device power back-off and the second downstream signal.
Present invention also offers a kind of binary channel downstream signal power compensating method, comprising:
Determine the power of the first downstream signal and the second downstream signal respectively;
If the power difference of described first downstream signal and described second downstream signal is more than or equal to setting threshold, then little to power in described first downstream signal and described second downstream signal signal carries out power back-off, is less than described setting threshold to make the power difference of the first downstream signal after power back-off and the second downstream signal.
Technical scheme of the present invention, whether the first downstream signal sent by power determination module determination radio frequency remoto module and the second downstream signal power difference are more than or equal to setting threshold; And carry out power back-off by the signal that power compensation module is little to power in this first downstream signal and the second downstream signal, to make the power difference of the first downstream signal after power back-off and the second downstream signal be less than setting threshold, to ensure user and cell throughout.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, be briefly described to the accompanying drawing used required in embodiment below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
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 making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
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 the present embodiment, comprising: power determination module 1 and power compensation module 2;
Power determination module 1, for determining the power of the first downstream signal and the second downstream signal respectively, and determines whether the power difference of this first downstream signal and the second downstream signal is more than or equal to setting threshold;
Power compensation module 2, if determine that the power difference of this first downstream signal and the second downstream signal is more than or equal to setting threshold for this power determination module, then little to power in this power determination module this first downstream signal determined and the second downstream signal signal carries out power back-off, is less than this setting threshold to make the power difference of the first downstream signal after power back-off and the second downstream signal.
The embodiment of the present invention is applicable to plurality of communication systems, such as: current 2G, 3G communication system and next generation communication system, such as global system for mobile communications (Global System for Mobilecommunications, 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 TermEvolution, LTE) system, and other these type of communication systems.
Be described for LTE system below, in order to meet the demand of user to high-speed data and multimedia service, indoor optical fiber distribution system is the major way solving in-door covering in LTE system.The indoor optical fiber distribution system of LTE can expand MIMO up-downgoing capacity gain by adopting binary channel mode.
First downstream signal of transmitting terminal and the second downstream signal are usually by radio frequency remoto module (RadioRemote Unit, RRU) send, first downstream signal is not identical with the power of the second downstream signal, if when the difference of the power of this two paths of signals is larger, user and cell throughout will be caused to decline, will normally carrying out of customer service be had a strong impact on.
In the technical scheme of the present embodiment, power determination module 1 determines the power of the first downstream signal and the second downstream signal respectively, and determines whether the power difference of 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 is more than or equal to setting threshold, the signal little to wherein power according to the power of high-power signal in this first downstream signal and the second downstream signal by power compensation module 2 carries out power back-off, the power difference of this first downstream signal and the second downstream signal is made to be less than this setting threshold, concrete, the power of the little signal of power in this first downstream signal and the second downstream signal can be increased, make this first downstream signal identical with the power of the second downstream signal.Such as, 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>P
th, then power compensation 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, the signal that existing various power compensating method can be adopted little to power in the first downstream signal and the second downstream signal compensates, such as: power compensator or gain compensator etc., this setting threshold is less than to make the power difference of the first downstream signal after power back-off and the second downstream signal, decline with stable user and cell throughout, ensure normally carrying out of customer service.
The binary channel downstream signal power compensating device that the present embodiment provides, whether the first downstream signal sent by power determination module determination radio frequency remoto module and the second downstream signal power difference are more than or equal to setting threshold; And carry out power back-off by the signal that power compensation module is little to power in this first downstream signal and the second downstream signal, to make the power difference of the first downstream signal after power back-off and the second downstream signal be less than setting threshold, to ensure 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 the present embodiment, power determination module 1 comprises: power decision device 11 and the first comparator 12;
Power decision device 11, for high-power signal in this first downstream signal and the second downstream signal is exported this binary channel downstream signal power compensating device, this first downstream signal and the second downstream signal are inputted this power compensation 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;
First comparator 12, comprise first input end I1, second input I2 and the first output O1, first input end I1 is used for the power ratio of high-power signal and low-power level signal in this first downstream signal that received power decision device 11 inputs and described second downstream signal, second input I2 is for inputting setting fiducial value, first output O1 is used for exporting the power ratio of this first downstream signal and the second downstream signal and the first comparison signal of this setting fiducial value to power compensation module 2, power back-off is carried out with the signal controlling power compensation module 2 little to power in this first downstream signal and the second downstream signal.
Power decision device 11 receives binary channel downstream signal, the power of this first downstream signal and the second downstream signal is compared, and wherein will export binary channel downstream signal power compensating device of the present invention by high-power signal, the signal that wherein power is little will export power compensation module 2 to, to carry out power back-off when the power difference of this two paths of signals is more than or equal to setting threshold.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, such as, the power of the first downstream signal and the second downstream signal is respectively P1 and P2, P1>P2, and 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 first comparator 12 receives this power ratio, compare the size of the setting fiducial value that this ratio and the second input I2 input, export the first comparison signal.This first comparison signal carries out power back-off for the signal controlling power compensation module 2 little to power in this first downstream signal and the second downstream signal, declines, ensure normally carrying out of customer service with stable user and cell throughout.
Preferably, as shown in Figure 3, power compensation 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;
3rd input I3, for received power decision device 11 export this first downstream signal and the second downstream signal in high-power signal; Four-input terminal I4, the little signal of power in this first downstream signal exported for received power decision device 11 and the second downstream signal;
Second output O2, carries out the signal after power back-off for the signal exported four-input terminal I4 inputs;
First control end C1, for receiving the first comparison signal that the first comparator 12 exports.
3rd input I3 and four-input terminal I4 of power compensation module 2 inputs the little signal of high-power signal and power in two paths of signals respectively, first control end C1 receives the first comparison signal that the first comparator 12 exports, and the little signal of the power inputted four-input terminal I4 according to this first comparison signal carries out power back-off.The first comparison signal that first comparator 12 exports is high level, then the power of signal that power compensation module 2 inputs according to the 3rd input I3 carries out power back-off to the signal that four-input terminal I4 inputs.
Preferably, 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;
One in two links of switch element 3 is connected with four-input terminal I4, and another is connected with the second output O2; Second control end C2 is connected with the 3rd output O3;
3rd output O3, for exporting the reverse signal of the first comparison signal;
5th input I5 is connected with the first output O1 of the first comparator 12;
Switch element 3, for closed under the control of this reverse signal of the 3rd output O3 output, to make the second output O2 output signal of power compensation module 2 be the signal that four-input terminal I4 inputs; Or, disconnecting under the control of this reverse signal of the 3rd output O3 output, carrying out the signal after power back-off with the signal making the second output O2 of power compensation module 2 output signal as inputting four-input terminal I4.
Switch element 3 can be logic switch, and when the second control end C2 input high level, switch element 3 closes, and when the second control end C2 input low level, switch element 3 disconnects.In the present embodiment, when the first output I1 of the first comparator 12 exports high level, namely the power difference of this first downstream signal and the second downstream signal is more than or equal to setting threshold, then this high level signal oppositely becomes low level through non-gate cell 4, switch element 3 disconnects, and this high level signal inputs the first control end C1, then the power of signal that power compensation module 2 inputs according to the 3rd input I3 inputs to four-input terminal I4 the signal that in this first downstream signal and the second downstream signal, power is little and carries out power back-off.Otherwise, when the first output I1 output low level of the first comparator 12, namely the power difference of this first downstream signal and the second downstream signal is less than setting threshold, then this low level signal inputs the first control end C1, power compensation module 2 will not carry out power back-off, and this low level signal oppositely becomes high level through non-gate cell 4, switch element 3 closes, four-input terminal I4 and the second output O2 conducting, the signal that in this first downstream signal and the second downstream signal, power is little will export the binary channel downstream signal power compensating device of the present embodiment by the second output O2.The technical scheme of the present embodiment, by comparing the first downstream signal of input and the power of the second downstream signal, and according to comparative result control power compensation module 2, power back-off is carried out to signal lower-powered in this two paths of signals, the power difference of the two paths of signals after power back-off is made to be less than this setting threshold, decline with stable user and cell throughout, ensure normally carrying out of customer service.
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 any embodiment shown in Fig. 2-Fig. 3, provide a kind of concrete feasible configurations of power decision device in the present embodiment, 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; As shown in Figure 4, the structure of power decision device 11 is only shown in figure.
Second comparator 111, for inputing to switches set 112 by second comparison signal of this first downstream signal and the second downstream signal;
Switches set 112, 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, and the 7th input I7 to arithmetic element 113 inputs the signal that in this first downstream signal and the second downstream signal, power is little; Also for by this first downstream signal and the second downstream signal power output decision device 11;
Arithmetic element 113, for calculating and exporting the power ratio of the 6th input I6 and the 7th input I7 input signal.
In the present embodiment, the second comparator 111 compares the first downstream signal of input second comparator 111 and the second downstream signal, obtains the second comparison signal, and inputs this second comparison signal to switches set 112.Switches set 112 can be made up of one group of logic switch and non-gate cell, for according to this second comparison signal and this first downstream signal and the second downstream signal, relatively draw the signal that in this first downstream signal and the second downstream signal, high-power signal and power are little, and input to the 6th input I6 and the 7th input I7 of arithmetic element 113 respectively; Also for by this first downstream signal and the second downstream signal power output decision device 11.For the switches set 113 that 4 logic switches and a non-gate cell form, as shown in Figure 4, 8th input I8 and the 9th input I9 of the second comparator 111 input this first downstream signal and the second downstream signal respectively, 8th input I8 is connected with the 7th input I7 with the 6th input I6 with the second logic switch S2 respectively by the first logic switch S1 in switches set 113, 9th input I9 is connected with the 7th input I7 with the 6th input I6 with the 4th logic switch S4 respectively by the 3rd logic switch S3 in switches set 113, and the output of the second comparator 111 and the first logic switch S1 are connected with the control end of the 4th logic switch S4, the output of the second comparator 111 is connected with the control end of the 3rd logic switch S3 with the second logic switch S2 by a non-gate cell.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 export high level, then the first logic switch S1 and the 4th logic switch S4 will close, second logic switch S2 and the 3rd logic switch S3 will disconnect, then the first downstream signal is by input the 6th input I6, and the second downstream signal is by input the 7th input I7; Otherwise, the output of the second comparator 111 is by output low level, then the first logic switch S1 and the 4th logic switch S4 will disconnect, second logic switch S2 and the 3rd logic switch S3 will close, then the first downstream signal is by input the 7th input I7, and the second downstream signal is by input the 6th input I6.Namely the 6th input I6 of 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 signal that in this first downstream signal and the second downstream signal, power is little.Arithmetic element 113 calculates and exports the power ratio of the 6th input I6 and the 7th input I7 input signal, i.e. the power ratio of high-power signal and the little signal of power in this first downstream signal and the second downstream signal.Such as, the power of the first downstream signal and the second downstream signal is respectively P1 and P2, P1>P2, and arithmetic element 113 can calculate
then this power ratio unit is dB.
The technical scheme of the present embodiment, by comparing the first downstream signal of input and the power of the second downstream signal, obtain the power ratio of the little signal of high-power signal and power in this first downstream signal and the second downstream signal, power back-off is carried out for signal lower-powered in this two paths of signals, the power difference of the two paths of signals after power back-off is made to be less than this setting threshold, decline with stable user and cell throughout, ensure 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 the present embodiment, comprising: radio frequency remoto module 51, the binary channel downstream signal power compensating device 52 described in aforementioned any embodiment and signal conversion module 53;
Radio frequency remoto module 51, for generation of the first downstream signal and the second downstream signal;
Binary channel downstream signal power compensating device 52, in this first downstream signal produced for radio frequency far-pulling module 51 and the second downstream signal, the little signal of power carries out power back-off;
Signal conversion module 53, sends to receiving terminal after carrying out signal conversion to high-power signal in this first downstream signal and the second downstream signal and power is little after Overpower compensating signal.
Transmitter provided by the invention, in its concrete structure and structure, functions is similar to the embodiment of aforementioned binary channel downstream signal power compensating device provided by the invention, repeats no more herein.
The transmitter of the present embodiment, radio frequency remoto module 51 produces the first downstream signal and the second downstream signal, the signal that binary channel downstream signal power compensating device 52 is little to wherein power according to the power of high-power signal in this first downstream signal and the second downstream signal carries out power back-off, the power difference of this first downstream signal and the second downstream signal is made to be less than this setting threshold, concrete, the power of the little signal of power in this first downstream signal and the second downstream signal can be increased, make this first downstream signal identical with the power of the second downstream signal.Signal conversion module 53 sends to receiving terminal after carrying out signal conversion to the first downstream signal after binary channel downstream signal power compensating device 52 power back-off and the second downstream signal.Power back-off is carried out by the signal little to power in two-way downstream signal, this setting threshold is less than to make the power difference of the first downstream signal after power back-off and the second downstream signal, decline with stable user and cell throughout, ensure 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, for carrying out intermediate frequency conversion to this first downstream signal and the second downstream signal, down-converts to different frequency signals respectively;
AD conversion unit 532, for being converted to digital signal by the analog signal after intermediate frequency converting unit 531 frequency conversion;
Electrooptic switching element 533, is converted to light signal for digital signal AD conversion unit 532 exported.
The transmitter that the present embodiment provides, the signal that in the first downstream signal sent by binary channel downstream signal power compensating device radio frequency far-pulling module and the second downstream signal, power is little carries out power back-off, setting threshold is less than to make the power difference of the first downstream signal after power back-off and the second downstream signal, through signal conversion module, this two paths of signals is finally converted into light signal again to transmit in a fiber, ensure that 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 the present embodiment can be performed by binary channel downstream signal power compensating device provided by the invention, specifically comprises the following steps:
S61: the power determining the first downstream signal and the second downstream signal respectively;
S62: if the power difference of this first downstream signal and the second downstream signal is more than or equal to setting threshold, then little to power in this first downstream signal and the second downstream signal signal carries out power back-off, is less than this setting threshold to make the power difference of the first downstream signal after power back-off and the second downstream signal.
The embodiment of the present invention is applicable to plurality of communication systems, such as: current 2G, 3G communication system and next generation communication system, such as gsm system, cdma system, tdma system, WCDMA system, FDMA system, OFDMA system, SC-FDMA system, gprs system, LTE system, and other these type of communication systems.
Be described for LTE system below, in order to meet the demand of user to high-speed data and multimedia service, indoor optical fiber distribution system is the major way solving in-door covering in LTE system.The indoor optical fiber distribution system of LTE can expand MIMO up-downgoing capacity gain by adopting binary channel mode.
First downstream signal and second downstream signal of transmitting terminal are sent by RRU usually, first downstream signal is not identical with the power of the second downstream signal, if when the difference of the power of this two paths of signals is larger, user and cell throughout will be caused to decline, will normally carrying out of customer service be had a strong impact on.
In the technical scheme of the present embodiment, determine the power of the first downstream signal and the second downstream signal respectively, and determine whether the power difference of 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 is more than or equal to this setting threshold, then little to wherein power according to the power of high-power signal in this first downstream signal and the second downstream signal signal carries out power back-off, such as, 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>P
th, then according to P1, the power of the second downstream signal is compensated, to make the power difference of the first downstream signal after power back-off and the second downstream signal be less than this setting threshold, declines with stable user and cell throughout, ensure 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 first downstream signal of S62 and described second downstream signal is more than or equal to setting threshold, then little to power in described first downstream signal and described second downstream signal signal carries out power back-off, comprising:
S71: the power ratio of this first downstream signal and the second downstream signal is compared with setting fiducial value;
S72: if this power ratio is more than or equal to this setting fiducial value, then little to power in this first downstream signal and the second downstream signal signal carries out power back-off, otherwise not little to power in this first downstream signal and the second downstream signal signal carries out power back-off.
In the present embodiment, by calculating the power ratio of the little signal of high-power signal and power in this first downstream signal and the second downstream signal, difference power size in this first downstream signal and the second downstream signal also can be reflected by the size of this power ratio.Such as, 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 more than or equal to this setting fiducial value, then illustrate that the difference of this first downstream signal and the second downstream signal power is comparatively large, user and cell throughout will be caused to decline, will have a strong impact on normally carrying out of customer service.Therefore little to power in this first downstream signal and the second downstream signal signal carries 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 carry out power back-off without the need to the signal little to power in this first downstream signal and the second downstream signal.
The present embodiment is by comparing the ratio of the power of the first downstream signal and the second downstream signal and the size setting fiducial value, determine whether to carry out power back-off to signal lower-powered in this two paths of signals, with the power difference of this two paths of signals in the reasonable scope, decline with stable user and cell throughout, ensure normally carrying out of customer service.
One of ordinary skill in the art will appreciate that: all or part of step realizing above-mentioned each embodiment of the method can have been come by the hardware that program command is relevant.Aforesaid program can be stored in a computer read/write memory medium.This program, when performing, performs the step comprising above-mentioned each embodiment of the method; And aforesaid storage medium comprises: ROM, RAM, magnetic disc or CD etc. various can be program code stored medium.
Last it is noted that above each embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to foregoing embodiments to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein some or all of technical characteristic; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (7)
1. a binary channel downstream signal power compensating device, is characterized in that, comprising: power determination module and power compensation module;
Described power determination module, for determining the power of the first downstream signal and the second downstream signal respectively, and determines whether the power difference of described first downstream signal and described second downstream signal is more than or equal to setting threshold;
Described power compensation module, if determine that the power difference of described first downstream signal and described second downstream signal is more than or equal to described setting threshold for described power determination module, then little to power in determined described first downstream signal of described power determination module and described second downstream signal signal carries out power back-off, is less than described setting threshold to make the power difference of the first downstream signal after power back-off and the second downstream signal;
Described power determination module comprises: power decision device and the first comparator;
Described power decision device, for high-power signal in described first downstream signal and described second downstream signal is exported described device, described first downstream signal and described second downstream signal are inputted described power compensation module, and by the first input end of described first comparator of the power ratio of described first downstream signal and described second downstream signal input;
Described first comparator, comprise first input end, second input and the first output, described first input end is for receiving the power ratio of high-power signal and low-power level signal in described first downstream signal of described power decision device input and described second downstream signal, described second input is for inputting setting fiducial value, described first output is used for exporting described first downstream signal and the power ratio of described second downstream signal and the first comparison signal of described setting fiducial value to described power compensation module, power back-off is carried out with the signal controlling described power compensation module little to power in described first downstream signal and described second downstream signal.
2. device according to claim 1, is characterized in that, described power compensation module comprises: the 3rd input, four-input terminal, the second output and the first control end;
Described 3rd input, for receive described power decision device export described first downstream signal and described second downstream signal in high-power signal;
Described four-input terminal, for receiving the little signal of power in described first downstream signal and described second downstream signal that described power decision device exports;
Described second output, carries out the signal after power back-off for exporting to the signal of described four-input terminal input;
Described first control end, for receiving described first comparison signal that described first comparator exports.
3. device according to claim 2, 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;
One in described two links is connected with described four-input terminal, and another is connected with described second output; Described second control end is connected with described 3rd output;
Described 3rd output, for exporting the reverse signal of described first comparison signal;
Described 5th input is connected with the first output of described first comparator;
Described switch element, for closed under the control of the described reverse signal of described 3rd output output, to make the signal of the second output output signal for described four-input terminal input of described power compensation module; Or, disconnect under the control of the described reverse signal of described 3rd output output, to make the second output output signal of described power compensation module for carrying out the signal after power back-off to the signal of described four-input terminal input.
4. the device according to any one of claim 1-3, is characterized in that, 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 second comparator, for inputing to described switches set by the second comparison signal of described first downstream signal and described second downstream signal;
Described switches set, for according to described second comparison signal and described first downstream signal and described second downstream signal, high-power signal in described 6th input described first downstream signal of input and described second downstream signal of described arithmetic element, the signal that power is little in described 7th input described first downstream signal of input and described second downstream signal of described arithmetic element; Also for described first downstream signal and described second downstream signal are exported described power decision device;
Described arithmetic element, for calculating and exporting the power ratio of described 6th input and described 7th input input signal.
5. a transmitter, is characterized in that, comprising: radio frequency remoto module, binary channel downstream signal power compensating device as described in any one of claim 1-4 and signal conversion module;
Described radio frequency remoto module, for generation of the first downstream signal and the second downstream signal;
Described binary channel downstream signal power compensating device, the signal little for power in described first downstream signal that produces described radio frequency remoto module and described second downstream signal carries out power back-off;
Described signal conversion module, sends to receiving terminal after carrying out signal conversion to the first downstream signal after described binary channel downstream signal power compensating device power back-off and the second downstream signal.
6. transmitter according to claim 5, 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, for carrying out intermediate frequency conversion to described first downstream signal and described second downstream signal, down-converts to different frequency signals respectively;
Described AD conversion unit, for being converted to digital signal by the analog signal after the frequency conversion of described intermediate frequency converting unit;
Described electrooptic switching element, is converted to light signal for the digital signal described AD conversion unit exported.
7. a binary channel downstream signal power compensating method, is characterized in that, comprising:
Determine the power of the first downstream signal and the second downstream signal respectively;
If the power difference of described first downstream signal and described second downstream signal is more than or equal to setting threshold, then little to power in described first downstream signal and described second downstream signal signal carries out power back-off, is less than described setting threshold to make the power difference of the first downstream signal after power back-off and the second downstream signal;
If the power difference of described first downstream signal and described second downstream signal is more than or equal to setting threshold, then little to power in described first downstream signal and described second downstream signal signal carries out power back-off, comprising:
The power ratio of described first downstream signal and described second downstream signal is compared with setting fiducial value;
If described power ratio is more than or equal to described setting fiducial value, then little to power in described first downstream signal and described second downstream signal signal carries out power back-off, otherwise not little to power in described first downstream signal and described second downstream signal signal carries out power back-off.
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| 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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