CN101998594B - Method and device for reducing mutual interference of multiple carriers - Google Patents
Method and device for reducing mutual interference of multiple carriers Download PDFInfo
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- CN101998594B CN101998594B CN200910165243.XA CN200910165243A CN101998594B CN 101998594 B CN101998594 B CN 101998594B CN 200910165243 A CN200910165243 A CN 200910165243A CN 101998594 B CN101998594 B CN 101998594B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
- H04L25/03343—Arrangements at the transmitter end
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2626—Arrangements specific to the transmitter only
Abstract
The invention discloses a method for reducing mutual interference of multiple carriers, comprising the following steps: adjusting the phase of the modulated signal; and comparing the performance index of the modulated signal with the set performance index, continuously adjusting the phase of the modulated signal if the set performance index can not be satisfied, and taking the current modulated signal as the output signal if the set performance index is satisfied. The invention simultaneously discloses a device for reducing mutual interference of the multiple carriers. The invention especially obviously improves the performance under the condition of adjacent configuration of multiple carriers, ensures that multiple carriers can simultaneously work in the same wireless signal coverage area and greatly improves the frequency spectrum utilization ratio.
Description
Technical field
The present invention relates to the treatment technology of multicarrier phase mutual interference in communication system, relate in particular to a kind of method and apparatus that reduces the mutual interference of multicarrier phase.
Background technology
Wireless communication system multipotency is supported multicarrier mode of operation at present, and multi-carrier mode refers to and transmits and receives all by the ripple that closes that is multiple single carriers.The for example CDMA20001x communication system for 800MHz frequency range, the bandwidth of single carrier is 1.23MHz, adjacent carrier centre frequency interval 1.23MHz, so multiple carrier waves when three carrier wave disposed adjacent be exactly for example three 1.23MHz bandwidth an about 3.69MHz of occupied bandwidth of the common composition of single carrier close ripple, the centre frequency of three carrier waves can be set to respectively 871.11MHz, 872.34MHz, 873.57MHz(can be also other frequency).Fig. 1 is code division multiple access (CDMA, Code Division Multiple Access) system frequency domain adjacent three carrier waves occur carrier-in-interference schematic diagram, as shown in Figure 1, in figure, the frequency of first carrier wave is 871.11MHz, second carrier frequency point is 872.34MHz, and the frequency of the 3rd carrier wave is 873.57MHz.In multi-carrier mode, there will be the partial information of a carrier wave to be aliased in adjacent carrier wave, occurred the phase mutual interference between multicarrier, particularly evident during carrier wave disposed adjacent.Two shadow regions are the aliasing region of carrier wave as can see from Figure 1, and the partial information of first carrier wave is aliased in second carrier wave, and the partial information in second carrier wave is aliased in first carrier wave simultaneously.Also there is analogue in second carrier wave and the 3rd carrier wave.In a carrier wave aliasing information of another one carrier wave, will become a kind of interference of this partial information and affect the quality of signal.Due to the existence of this interference, at receiving terminal receiver, probably cannot do correct demodulation to signal, this interference is particularly outstanding on the impact performance of the EV-DO signal in cdma system.
In multi-carrier wireless communications system, for multi-carrier EV-DO communication pattern in the quality, the especially cdma system that guarantee to communicate by letter, must reduce the impact of the phase mutual interference between carrier wave.At present industry there is no the solution of the multicarrier phase mutual interference of multi-carrier EV-DO disposed adjacent in cdma system especially in wireless communication system.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of method and apparatus that reduces the mutual interference of multicarrier phase, can obviously reduce the multicarrier phase mutual interference of adjacent carrier frequency.
For achieving the above object, technical scheme of the present invention is achieved in that
A method that reduces the mutual interference of multicarrier phase, comprising:
Adjust the initial phase of the rear signal of modulation; Comprise: the input parameter of parameter devices, priority and the stepping amount of the rear signal of modulation selected is set, according to the initial phase of signal after described input parameter, priority and stepping amount adjustment modulation; The setting of described priority is to set gradually numbering according to the frequency parameter size of signal after modulation, and determines according to described numbering; The setting of described stepping amount is to determine according to the difference amount of the performance index of signal after modulation and setting performance index;
The performance index of signal and the performance index of setting after modulation are compared, can not meet while setting performance index, after the described modulation of continuation adjustment, the initial phase of signal, meets while setting performance index, using signal after current modulation as output signal.
Preferably, when the modulation system of described modulation signal is cascade modulation, from the first order is modulated corresponding modulation signal, step by step the initial phase of signal after corresponding modulation is adjusted, after the modulation of to the last one-level output, the performance index of signal meet while setting performance index, and after the modulation that modulation at different levels are determined, signal is as output signal.
Preferably, described performance index comprise at least one in ratio MAX IT and the waveform quality Rho of the inactive code channel maximum power of carrier wave and activated code channel gross power.
A device that reduces the mutual interference of multicarrier phase, comprising:
Adjustment unit, for adjusting the initial phase of the rear signal of modulation, comprising: the input parameter of parameter devices, priority and the stepping amount of the rear signal of modulation selected is set, according to the initial phase of signal after described input parameter, priority and stepping amount adjustment modulation; The setting of described priority is to set gradually numbering according to the frequency parameter size of signal after modulation, and determines according to described numbering; The setting of described stepping amount is to determine according to the difference amount of the performance index of signal after modulation and setting performance index;
Performance index determining unit, for the performance index of signal after definite described modulation;
Comparing unit, for the performance index of signal after described modulation and the performance index of setting are compared, can not meet while setting performance index, trigger described adjustment unit and continue the initial phase of signal after the described modulation of adjustment, meet while setting performance index, trigger determining unit; And
Determining unit, for using signal after current modulation as output signal.
Preferably, when the modulation system of described modulation signal is cascade modulation, from the first order is modulated corresponding modulation signal, described adjustment unit is adjusted the initial phase of signal after corresponding modulation step by step, until described comparing unit determines that the performance index of signal meet while setting performance index after the modulation of afterbody output, after the modulation that described determining unit is determined modulation at different levels, signal is as output signal.
Preferably, described performance index comprise at least one in ratio MAX IT and the waveform quality Rho of the inactive code channel maximum power of carrier wave and activated code channel gross power.
By above technical scheme, the present invention has realized following beneficial effect: can solve preferably the mutual interference problem of multi-carrier signal in wireless communication system, especially for the phase mutual interference between multi-carrier EV-DO signal in cdma system.Particularly evident to the improvement of performance in multicarrier disposed adjacent situation.Make so same wireless signal overlay area can have multicarrier to work simultaneously, greatly improved the availability of frequency spectrum, improve the flexibility of wireless planning, improve volume of business, transmission rate and the service quality of community, improved user's experience.
Accompanying drawing explanation
Fig. 1 is the carrier-in-interference schematic diagram of the three carrier waves appearance that cdma system frequency domain is adjacent;
Fig. 2 is to single-carrier modulated mode schematic diagram in wireless communication system;
Fig. 3 is the schematic diagram of the modulation system of multicarrier of the present invention;
Fig. 4 is the structural representation that the present invention selects parameter devices;
Fig. 5 is that utilization of the present invention selects parameter devices to adjust the structural representation of modulation signal;
The structural representation that disturbs processing unit falls in Fig. 6 while being carrier wave multi-level modulation of the present invention;
Fig. 7 is the composition structural representation that the present invention reduces the device of multicarrier phase mutual interference.
Embodiment
Basic thought of the present invention is: in multicarrier system, between the multicarrier that particularly frequency domain is adjacent, intercarrier can exist phase mutual interference.The present invention is by adjusting the initial phase of signal after the modulation of each carrier wave, makes the performance index of signal after each modulation meet the performance index of setting.Because the phase place of signal and the carrier frequency of carrier wave and initial phase after modulation are relevant, and the carrier frequency of carrier wave is planned by communication system substantially, belong to nonadjustable parameter, therefore, the present invention mainly adjustment of the initial phase by modulating rear signal reduces the interference between multicarrier.The present invention program realizes simple and practical.
For making the object, technical solutions and advantages of the present invention clearer, by the following examples and with reference to accompanying drawing, the present invention is described in more detail.
Transmitting in modern wireless communication systems realizes communication by information is modulated on transferred signal, wherein, transferred signal can be produced by devices such as numerically-controlled oscillator (NCO, Numerical Control Oscillator) or simulative generators.Modulated process can be completed as polytype modulators such as real number modulator, complex modulator or quadrature modulators by modulator.
After reflection modulation, the parameter of characteristics of signals has a lot, and frequency and phase place are wherein two.For example, signal C(t after modulation) can be expressed as: C(t)=A(t) × cos(2 π ft+ θ)+j × A(t) × sin(2 π ft+ θ).Wherein A(t) be amplitude, the variable relevant with time t and baseband signal, f is carrier frequency, θ is the initial phase of signal after modulation, and (2 π ft+ θ) is the phase place of the rear signal of modulation, and it is the function of a frequency f, time t and initial phase θ, unification W(t in the present invention, f, θ) represent, referred to as W.If real modulation, only need to use C(t) in real part.
In traditional multi-carrier wireless communications system, only the frequency of transferred signal is made to appointment, and by the phase place W that modulates rear signal being made to special appointment, do not reach the object that reduces inter-carrier interference.
And the phase place W of signal is a frequency f after modulation, the function of time t and initial phase θ, wherein t is the variable quantity in a moment, has represented the characteristic of signal, uncontrollable.F and θ are two controlled variablees, can reach and adjust the object of signal phase W after modulation by change wherein any one or change two variablees simultaneously.In wireless communication system, the carrier position of transmitting is had to stricter requirement, thereby a little less than the deviation range relative narrower flexibility of f, and initial phase θ has larger adjusting range and flexibility.Technical scheme of the present invention proposes for this feature just.
By accompanying drawing, further illustrate this point below.
Fig. 2 be in wireless communication system to single-carrier modulated mode schematic diagram, as shown in Figure 2, figure comprises that two parts are modulator 200 and transferred signal generator 201.Modulator 200 obtains output signal y for input signal x being modulated on transferred signal, and modulator 200 is real modulation device conventional in wireless communication system, plural debugger or quadrature modulator etc.Transferred signal generator 201 is the generations that complete transferred signal according to input parameter.The present invention reaches and reduces the problem of disturbing between each carrier wave the initial phase adjustment of output signal y just.
Fig. 3 is the flow chart that the present invention reduces the method for multicarrier phase mutual interference, as shown in Figure 3, in step 301, the input parameter that selects parameter devices is set, these parameters can comprise the information parameter of expression input signal (modulation signal or baseband signal) and the parameter of output signal performance index.In step 302, extract the output signal (signal after modulation) of communication system, determine its performance index, as the foundation of selecting the rear signal of modulation.In step 304, according in step 302 obtain signal performance index and the signal performance index of setting between gap judge current modulation after signal (output signal) whether reach requirement.In step 303, according to the above-mentioned signal performance index calculating, according to optimized algorithm, calculate the initial phase of the rear signal of next group modulation, as the new initial phase of signal after each modulation.Repeating step 301,302,303 and 304 until find the initial phase of one group of rear signal of modulation that the performance index of output signal are met the demands.In step 305, the initial phase finally obtaining is solidified, as signal group after initial phase that some customized configurations adopt modulation.
Fig. 4 is the schematic diagram that selects parameter devices that the present invention proposes, and as shown in Figure 4, the parameter devices of selecting of the present invention is selected software group by signal extraction hardware and phase place.Signal extraction hardware can be custom-designed circuit, can be also special or general instrument.It can be operate in the software in CPU or operate in the software in programmable logic device or all comprise that phase place is selected software, and this software also can solidify and move with the form of hardware.Of the present inventionly select several input parameters that parameter devices when work needs to comprise: the type parameter n of input signal, the signal number m of input signal, the positional information k of input signal.In actual use, according to different systems or carrier case, can only use input parameter partly or completely.The output parameter that selects parameter devices of the present invention comprises that the initial phase of the rear signal of modulation selects parameter result indicative signal.Result indicative signal has represented to select an operating state of parameter devices, and done state is still just in running status.The parameter devices of selecting of the present invention is carried out work according to the parameter mode that selects in Fig. 3, both can before system operation, use, and also can in system running, use.The parameter devices main application of selecting of the present invention is the initial phase that generates signal after each modulation, and outputs to after each modulation in signal, and the initial phase that makes signal after each modulation is exported take the initial phase place value of selecting parameter devices output as initial phase.
Fig. 5 is that utilization of the present invention selects parameter devices to adjust the structural representation of modulation signal, and as shown in Figure 5, modulator group can be the various modulator type that adopt in wireless communication system, and its function has been the modulation of multicarrier.Modulator group has two input signals, and one is that the carrier signal of inputting is modulation signal X1...Xm, and another one is the transferred signal 1..m of transferred signal generator group output.Wave multiplexer is for closing ripple by m single carrier after modulation.Coupler is for feeding back to the parameter devices of selecting of the present invention by output signal, and as an input parameter that selects parameter devices, together with other input parameter, the present invention selects parameter devices that the optimized algorithm according to certain is carried out to choosing of initial phase parameter.Finally the initial phase choosing is set in the rear signal of each modulation.Select the function of parameter devices and select parameter devices identical shown in Fig. 4.
Take the cdma system of three carrier waves as example, in conjunction with the method shown in Fig. 3, further illustrating technical solution of the present invention is essence below.
Fig. 3 is the flow chart that the present invention reduces the method for multicarrier phase mutual interference, and as shown in Figure 3, the method that the present invention reduces the mutual interference of multicarrier phase comprises the following steps:
Step 301: input parameter is arranged.Input parameter comprises and represents the relevant parameter of input signal and the parameter of output signal performance index.For example: the type of incoming carrier is CDMA1X signal in this example; Incoming carrier number is three carrier waves in this example; Incoming carrier positional information is 871.11MHz, 872.34MHz, the 873.57MHz that disposed adjacent is set in this example; The initial phase parameter of signal after input modulation, in this example, the initial phase of carrier wave obtains the function by a random serial generator, and starts generator seed to be all set to 0 for the first time.Three carrier phase initial values that obtain by seed 0 are as input parameter.In this example, after modulation, the initial phase of carrier wave obtains the function by a random serial generator, and starts generator seed to be all set to 0 for the first time.Three carrier phase initial values that obtain by seed 0 are as input parameter; The requirement of input (signal after modulation) performance index to transmitting, this example for be 1X signal, the index of weighing 1X signal has: the ratio MAX IT of the inactive code channel maximum power of carrier wave and activated code channel gross power, standard-required is-27dBc; Waveform quality Rho, standard-required 0.912.
Step 302: determine the performance index that transmit.The mode of determining the performance index that transmit can be three carrier performance indexs that extract correspondence after initial phase is set up by general measuring instrument, and MAX IT and the Rho of each carrier wave are respectively worth.Also can calculate the performance index that transmit by corresponding Survey Software.
Step 303: the performance index of the performance index that obtain in step 302 and setting are compared, draw corresponding difference, as the foundation of signal selected phase after modulation.If transmitted, the performance index of (signal after modulation) meet the performance index requirement of setting, exit phase place and adjust flow process, enter into step 305, otherwise enter into step 304: adjust stepping amount (adjustment amount), and return to the further initial phase of the modulated rear signal of adjustment of step 301.
After modulation, the adjustment algorithm of signal initial phase is a constantly process for circulation, until the baseband signal that receiver demodulates meets the demands, Shi Caihui exits circulation.
First according to the frequency parameter of signal after modulation, provide successively from big to small numbering from big to small.As in this example ,-1.23MHz is corresponding be numbered 1,0MHz corresponding be numbered 2,1.23MHz corresponding be numbered 3; The rear signal phase of modulation arranges the height of priority and will determine according to the numbering of signal after modulation.If intercarrier is disposed adjacent, number so minimum priority minimum, the highest priority of numbering is taken second place, and the priority of other numbering is arranged from big to small according to the size order of numbering.After setting completes, signal after obtaining a priority and modulation is numbered to array corresponding and that arrange from high to low one by one.In this example, each is numbered corresponding priority and is: numbering 1 correspondence be 1, numbering 2 correspondences be 3, numbering 3 correspondences be 2.The larger priority of numeral is higher.
In the present invention, stepping amount is to be divided into two grades according to the difference amount of the requirement that calculates each carrier performance index and setting performance index in step 303: large stepping and little stepping.If obtain a difference of performance index in step 303, be greater than 0.6, adopt so larger step by step modulating initial phase, in this example, use 50 °, if obtain difference in step 303, be less than 0.6, adopt so the less mode of stepping to adjust phase place, in this example, adopt 20 ° of steppings.After just can obtaining a modulation after the setting of stepping amount completes, signal is numbered and stepping amount array one to one.The setting of stepping amount will dynamically be changed according to the size of performance difference.
Obtain after priority and stepping amount, according to priority and stepping amount, the initial phase of the rear signal of each modulation is adjusted, until obtain the performance index of corresponding carrier wave, for optimum, will stop adjustment, here optimum judgment basis is that phase place increases and minimizing all can cause this carrier performance to worsen, and this time, corresponding carrier performance was optimum so.Complete will obtain one group after the modulation of all phase places and make relatively preferably phase-group of each carrier wave (signal after the modulation of output) performance, and be referred to as the first round and adjust and obtain phase-group.In the first round, only check that whether each carrier performance is relatively excellent in stopping foundation, due to influencing each other between phase modulation, so the phase place that the first round obtains not necessarily makes each carrier performance can meet standard-required at every turn.The phase-group obtaining after adopting the first round to adjust, combines and checks whether each carrier wave can meet the demands, and meets and exits, and does not meet and carries out next round adjustment.
Second takes turns and first the first round be set while adjusting adjust gained phase place and extract the performance index of each carrier wave, the difference transmitting between performance index of signal after the modulation of calculating and current best initial phase, according to the size of difference, the second priority of taking turns each carrier wave of phase modulation is set, the larger priority of difference is higher.Second takes turns unification in adjustment adopts less step by step modulating as 10 °.Whether every performance index of extracting corresponding phase-modulated carrier after a phase place that arrange, calculate and be improved, if be improved, continues so this carrier wave adjustment, if without improving, stops this carrier wave adjustment and carry out the adjustment of next carrier wave.So repeat until adjusted the phase place of all carrier waves, and claim this to take turns to adjust the phase-group obtaining and be referred to as second and take turns phase-group.
Second takes turns the phase-group obtaining after adjustment combines to check whether each carrier wave can meet the demands, and meets and exits, and does not meet and carries out next round adjustment.The mode that two-wheeled adopts respectively the mode of large stepping coarse adjustment to enter accurate adjustment with small step has above obtained the only relative one group of optimum phase-group of each carrier performance.In ensuing adjustment, adjusted once at every turn and by observing all carrier performance, whether be improved afterwards, only have the performance of all carrier waves to be all improved the phase place of just upgrading corresponding carrier wave, otherwise do not upgrade, and constantly according to difference size, upgrade priority, constantly according to as 1 ° come progressively reduce stepping amount, and the performance of all calculating each carrier wave after phase place has been set at every turn whether meets the demands, after meeting the demands, release, if satisfied, continue poll.When being polled to phase step input and being set to 0, show cannot find one group of suitable phase-group that carrier performance is met the demands based on the initial phase that uses seed full 0 to produce based on randomizer for the first time in step 401, must upgrade one group of new randomizer seed this time, repeat the initial phase adjustment process of said method next time.Except randomizer seed be for the first time an initial value starting to provide for as in this example, be 0, other time seed renewal always adopt phase step in circulation last time to enter that while still not obtaining reasonable phase place at 0 o'clock to organize phase place as new seed.
What circulate in the manner described above searches, but avoid to certain situation repeatedly the seed of randomizer after upgrading, still can not find the situation of appropriate phase, prevent from adjusting and enter into an endless loop, thereby in once searching, be necessary regulation seed upgrade maximum times, in this example, be set to 20 times, if exceed 20 times, will exit current phase place adjustment, and inform that this time search unsuccessfully.After waiting for a period of time, re-start initial phase adjustment, until find suitable initial phase for each carrier wave.
After above-mentioned modulation, in the phase place adjustment mode of signal, first round adjustment mode is the mode of adjusting modulating the initial phase of rear signal successively, and the second rotation perfect square formula is the mode that after each modulation, the initial phase of signal is adjusted simultaneously.
Step 305: solidify the initial phase of signal after modulation, be about to the current modulation that meets performance index after signal be defined as output signal.
The structural representation that disturbs processing unit falls in Fig. 6 while being carrier wave multi-level modulation of the present invention, as shown in Figure 6, be the applicable cases of m carrier wave n level modulation.Modulator group, transferred signal generator group, wave multiplexer and coupler in figure are identical with the function of the each device shown in Fig. 5, and modulator groups at different levels are for being modulated to transferred signal by corresponding modulation signal.Can be optionally during multi-level modulation the initial phase of signal after one-level or multistage modulation be adjusted.After the modulation of the present invention during to multi-level modulation, the adjustment of signal initial phase describes.On the whole, after modulation during multi-level modulation, after the initial phase adjustment of signal and single-stage modulation, the means that realize of signal initial phase adjustment are identical, different is that after the modulation of the last output of judgement, whether signal meets the performance index of setting and determine whether adjustment finishes while being multi-level modulation, when signal after the modulation of last output meets after the performance index of setting, at different levels determine modulation afterwards signal as output signal at different levels.
When the modulation system of modulation signal is cascade modulation, from the first order is modulated corresponding modulation signal, step by step the initial phase of signal after corresponding modulation is adjusted, mode shown in mode and the earlier figures 3 of adjusting is basic identical, just criterion difference, after the modulation of to the last one-level output, the performance index of signal meet while setting performance index, and after the modulation that modulation at different levels are determined, signal is as output signals at different levels.
For the adjustment of initial phase of three carrier wave EV-DO signals of doing disposed adjacent in cdma system, the mode that contrasts aforementioned three carrier wave 1X signal phase adjustment is identical, and the performance index that transmit of input in step 401 that do not exist together exactly require different.The index of weighing EV-DO signal has: the waveform quality Rho1 that pilot channel is corresponding, the waveform quality Rho2 that MAC channel is corresponding, the waveform quality Rho3 that DATA channel is corresponding, the MAX IT1 that pilot channel is corresponding, the MAX IT2 that MAC channel is corresponding, the MAX IT3 that DATA channel is corresponding.
In addition, the present invention is equally applicable to do in cdma system the situation of two carrier wave EV-DO signals of disposed adjacent and the mixed configuration of 1 carrier wave 1X signal, with the difference of aforementioned adjustment mode be: in step 301, will input the performance index of the requirement of the carrier wave of 1X and EV-DO simultaneously, in step 303, also need the configuration of priority slightly to change.In mixed configuration pattern, first EV-DO signal and 1X signal to be distinguished respectively, be divided into two pure EV-DO and pure 1X signal group.Two groups of signals are arranged respectively to the priority of phase modulation according to mode in foregoing example, after having arranged, will according to the priority of EV-DO, always higher than the principle of 1X priority, to modulating rear signal, carry out the adjustment of initial phase.If for example in this example, after the modulation of 1X signal, the frequency parameter of signal is 1.23MHz, two other EV-DO is respectively 0MHz ,-1.23MHz, and what provide its correspondence is numbered 1,2,3 according to describing and obtain corresponding priority and be above: 1,2,3.
The technical scheme that the present invention records is applicable to the wireless communication system of other standard equally, Wideband Code Division Multiple Access (WCDMA) (WCDMA, Wideband Code Division Multiple Access) system and TD SDMA (TD-SCDMA, Time Division-Synchronous Code Division Multiple Access) system.For the wireless communication systems of other standard, only need to be according to the performance index parameter corresponding to standard-required change signal of different systems, other steps will be identical.
Fig. 7 is the composition structural representation that the present invention reduces the device of multicarrier phase mutual interference, as shown in Figure 7, the device that the present invention reduces the mutual interference of multicarrier phase comprises adjustment unit 70, performance index determining unit 71, comparing unit 72 and determining unit 73, wherein, adjustment unit 70 is for adjusting the phase place of the rear signal of modulation; Performance index determining unit 71 is for determining the performance index of signal after described modulation; Comparing unit 72 is for comparing the performance index of signal and the performance index of setting after modulation, can not meet while setting performance index, after the described modulation of triggering adjustment unit 70 continuation adjustment, the phase place of signal, meets while setting performance index triggering determining unit 73; Determining unit 73 is for using signal after current modulation as output signal.Adjustment unit 70 to the modulation of each carrier wave after the phase place of signal adjust simultaneously.Adjustment unit 70 to the modulation of each carrier wave after signal adjust successively.After modulation, the phase place of signal comprises the initial phase of signal after the carrier frequency of signal after described modulation, described modulation.Adjustment unit 70 is adjusted the initial phase of signal after described modulation.Described performance index comprise at least one in ratio MAX IT and the waveform quality Rho of the inactive code channel maximum power of carrier wave and activated code channel gross power.
When the modulation system of modulation signal is cascade modulation, from the first order is modulated corresponding modulation signal, adjustment unit 70 is adjusted the phase place of signal after corresponding modulation step by step, until the performance index of signal meet while setting performance index after the modulation of the definite afterbody output of comparing unit 72, after the modulation that determining unit 73 is determined modulation at different levels, signal is as output signal.
Those skilled in the art are to be understood that, the device of the reduction multicarrier phase mutual interference shown in Fig. 7 of the present invention is that the method for realizing the mutual interference of aforementioned reduction multicarrier phase designs, the practical function of the each processing unit in Fig. 7 shown device can be understood with reference to the associated description in the method for aforementioned reduction multicarrier phase mutual interference, the function of each unit can realize by the program running on processor, also can realize by corresponding logical circuit.
The above, be only preferred embodiment of the present invention, is not intended to limit protection scope of the present invention.
Claims (6)
1. a method that reduces the mutual interference of multicarrier phase, is characterized in that, comprising:
The initial phase of adjusting the rear signal of modulation, comprising: the input parameter of parameter devices, priority and the stepping amount of the rear signal of modulation selected is set, according to the initial phase of signal after described input parameter, priority and stepping amount adjustment modulation; The setting of described priority is to set gradually numbering according to the frequency parameter size of signal after modulation, and determines according to described numbering; The setting of described stepping amount is to determine according to the difference amount of the performance index of signal after modulation and setting performance index;
The performance index of signal and the performance index of setting after modulation are compared, can not meet while setting performance index, after the described modulation of continuation adjustment, the initial phase of signal, meets while setting performance index, using signal after current modulation as output signal.
2. method according to claim 1, it is characterized in that, when the modulation system of described modulation signal is cascade modulation, from the first order is modulated corresponding modulation signal, step by step the initial phase of signal after corresponding modulation is adjusted, after the modulation of to the last one-level output, the performance index of signal meet while setting performance index, and after the modulation that modulation at different levels are determined, signal is as output signal.
3. method according to claim 1, is characterized in that, described performance index comprise at least one in ratio MAX IT and the waveform quality Rho of the inactive code channel maximum power of carrier wave and activated code channel gross power.
4. a device that reduces the mutual interference of multicarrier phase, is characterized in that, comprising:
Adjustment unit, for adjusting the initial phase of the rear signal of modulation, comprising: the input parameter of parameter devices, priority and the stepping amount of the rear signal of modulation selected is set, according to the initial phase of signal after described input parameter, priority and stepping amount adjustment modulation; The setting of described priority is to set gradually numbering according to the frequency parameter size of signal after modulation, and determines according to described numbering; The setting of described stepping amount is to determine according to the difference amount of the performance index of signal after modulation and setting performance index;
Performance index determining unit, for the performance index of signal after definite described modulation;
Comparing unit, for the performance index of signal after described modulation and the performance index of setting are compared, can not meet while setting performance index, trigger described adjustment unit and continue the initial phase of signal after the described modulation of adjustment, meet while setting performance index, trigger determining unit; And
Determining unit, for using signal after current modulation as output signal.
5. device according to claim 4, it is characterized in that, when the modulation system of described modulation signal is cascade modulation, from the first order is modulated corresponding modulation signal, described adjustment unit is adjusted the initial phase of signal after corresponding modulation step by step, until described comparing unit determines that the performance index of signal meet while setting performance index after the modulation of afterbody output, after the modulation that described determining unit is determined modulation at different levels, signal is as output signal.
6. device according to claim 4, is characterized in that, described performance index comprise at least one in ratio MAX IT and the waveform quality Rho of the inactive code channel maximum power of carrier wave and activated code channel gross power.
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| CN200910165243.XA CN101998594B (en) | 2009-08-08 | 2009-08-08 | Method and device for reducing mutual interference of multiple carriers |
| PCT/CN2009/075914 WO2011017887A1 (en) | 2009-08-08 | 2009-12-23 | Method and device for reducing mutual interference between multi-carriers |
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| CN1296684A (en) * | 1998-02-12 | 2001-05-23 | 金吉斯通讯公司 | Multiple access method and system |
| CN1514555A (en) * | 2002-12-31 | 2004-07-21 | �����ʩ���عɷݹ�˾ | Method of self eliminating interference between self adaptive carriers and receiving and transmitting machine |
| CN101185269A (en) * | 2005-05-30 | 2008-05-21 | 松下电器产业株式会社 | Wireless communication base station apparatus and wireless communication method in multicarrier communication |
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| CN1296684A (en) * | 1998-02-12 | 2001-05-23 | 金吉斯通讯公司 | Multiple access method and system |
| CN1514555A (en) * | 2002-12-31 | 2004-07-21 | �����ʩ���عɷݹ�˾ | Method of self eliminating interference between self adaptive carriers and receiving and transmitting machine |
| CN101185269A (en) * | 2005-05-30 | 2008-05-21 | 松下电器产业株式会社 | Wireless communication base station apparatus and wireless communication method in multicarrier communication |
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