CN1953361B - A method and system for sending multiple carrier frequency signal - Google Patents
A method and system for sending multiple carrier frequency signal Download PDFInfo
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- CN1953361B CN1953361B CN200510109411A CN200510109411A CN1953361B CN 1953361 B CN1953361 B CN 1953361B CN 200510109411 A CN200510109411 A CN 200510109411A CN 200510109411 A CN200510109411 A CN 200510109411A CN 1953361 B CN1953361 B CN 1953361B
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Abstract
The invention relates to a method for sending multi-carrier signal. Wherein, it comprises that: generating the base band time slit of each carrier frequency; fixing the phase drift fact needed by each carrier wave; multiplying said base band time slit signal with relative phase drift factor; reflecting the drifted base band time slit signal. The invention also discloses a relative system, which comprises a base band time slit signal generator, carrier modulator, phase drifter, signal layer device, radio modulator. The invention can effectively reduce the signal peak/average ratio in multi-carrier TD-SCDMA.
Description
Technical field
The present invention relates to the mobile communication technology field, be specifically related to a kind of method and system that send multi-carrier frequency signals.
Background technology
In mobile communication system, use multi-transceiver technology, can make base station equipment can support more customer volume or bigger coverage is provided, improve power system capacity, thereby number of base stations and site are reduced significantly, make system operator reduce investment.
TD-SCDMA (Time Division-Synchronous Code Division Multiple Access) system is one of three big mainstream technologys of present 3GPP standard.TD-SCDMA adopts TDD (time division duplex) mode, can realize the asymmetric distribution of up-downgoing resource, has very high band efficiency, is a kind of desirable Cellular Networks block data transmission system.In 3GPP standard Rlease 5 versions, the HSDPA maximum packet data transmission rate of TD-SCDMA system is 2.8M bps.
The TD-SCDMA time slot signal totally 848 chip (chip), its structure as shown in Figure 1:
Wherein, the midamble (training sequence) at burst middle part is used for carrying out channel estimating, and the data block on both sides is used for transmit traffic data.
Above-mentioned channel estimating code midamble generates in the following manner:
For the same time slot of same sub-district, a given basic intermediate code is as basic code, and different users adopts the channel estimating code of the different cyclic shift version of this identical basic code as it.By same independent basic code m
PThe K that derives a specific intermediate code m
P (k)K=1 ..., K constitutes intermediate code sign indicating number collection, abbreviates the sign indicating number collection as.
According to existing TD-SCDMA multi-carrier scheme, a plurality of carrier waves of supporting for same sub-district have following agreement: main carrier uses identical scrambler and basic midamble (training sequence) sign indicating number with auxilliary carrier wave, for multi-carrier district, and the shared cover transmitter of radio-frequency head.Existing multi-carrier TD-SCDMA system time slot signal forms as shown in Figure 2:
The basic midamble code position of each carrier wave is a complete matching, and the basic midamble sign indicating number of each carrier wave all is identical binary sequence vector simultaneously.
The identical carrier wave of a plurality of basic midamble sign indicating numbers also needs through twice modulation: carrier modulation (perhaps being called intermediate frequency Modulation) and rf modulations as baseband signal.Wherein, carrier modulation is that each carrier signal is modulated on the different frequencies; Rf modulations is to be modulated on the radio frequency through the intermediate frequency broadband signal after the carrier modulation.Go out via antenna transmission through the high-frequency signal after the rf modulations.
Because TD-SCDMA is a synchro system, will occur owing to the peak-to-peak superposition produces bigger peak power in the basic midamble sign indicating number part of transmitting terminal like this, make whole time slot signal peak-to-average force ratio too big, can make that radiofrequency signal enters the inelastic region, thereby produce distortion and stronger spectral leakage, reduce systematic function.
In order to reduce signal peak-to-average ratio, reduce distorted signals and spectral leakage, mainly contain following several method in the prior art: block coding method; Clipping method; Reduce probability method. for the TD-SCDMA system, it is very complicated that the method for block encoding implements. and the method for slicing is that the bigger carrier wave of amplitude or all carrier waves are cut down or compressed and reduce peak-to-average force ratio, two kinds of implementations are arranged usually: a kind of is in Base-Band Processing, baseband signal is just carried out the amplitude limit slicing, another kind is with the slicing device signal to be carried out amplitude limit in radio frequency part. these two kinds of schemes all can make the signal waveform distortion, the precision of loss large-signal, performance impact for system is bigger. mainly contains the part transmitting sequence in the probability method and selects two kinds of schemes of mapping and reduce, for different systems, it is inequality on realizing. at present, for the TD-SCDMA system, also there is not specifically effectively to improve the scheme of multi-carrier signal peak equal ratio.
Summary of the invention
The purpose of this invention is to provide a kind of method that sends multi-carrier frequency signals, when overcoming the emission of multi-carrier signal in the prior art because a plurality of carrier waves adopt identical midamble sign indicating number, thereby produce stronger ACLR, influence the shortcoming of systematic function, in multi-carrier TD-SCDMA system, reduce the multi-carrier signal peak equal ratio simply and effectively.
Another object of the present invention provides a kind of system that sends multi-carrier frequency signals, and the signal peak-to-average ratio when launching to reduce multi-carrier signal improves systematic function.
For this reason, the invention provides following technical scheme:
A kind of method that sends multi-carrier frequency signals may further comprise the steps:
A, generate the base band time slot signal of each carrier frequency;
B, determine that each carrier signal needs the phase place deflection factor of deflection;
C, the base band time slot signal of described each carrier frequency be multiply by corresponding phase place deflection factor;
D, the base band time slot signal after the deflection is launched processing.
Alternatively, described step B is specially:
Be the fixing phase place deflection factor of each allocation of carriers in advance.
Alternatively, described step B is specially:
B1, press pre-defined rule to each carrier index;
B2, determine that according to carrier wave number N and each carrier index n the phase place deflection factor of each carrier wave is:
N=0,1,2 ... N-1.
Alternatively, described step B1 is specially: according to the frequency size order of each carrier wave to each carrier index.
Alternatively, described step B1 is specially:
Obtain the system centre frequency;
According to the difference size of each carrier frequency point and center frequency point to each carrier index.
Alternatively, described step C is specially: the whole base band time slot signal of described each carrier frequency be multiply by corresponding phase place deflection factor.
Alternatively, described step C is specially: the midamble signal section of the base band time slot signal of described each carrier frequency be multiply by corresponding phase place deflection factor.
A kind of system that sends multi-carrier frequency signals, described system comprises:
The base band time slot signal generating apparatus corresponding with each carrier wave is used to generate the base band time slot signal of each carrier frequency;
The carrier modulation device corresponding with each carrier wave is used for each base band time slot signal is modulated to different frequencies;
Signal superposition device is coupled in each carrier modulation device respectively, is used for the carrier signal that is modulated on the different frequency is carried out overlap-add procedure;
Radio frequency modulating device is coupled in described signal superposition device, is used for the multi-carrier signal after the stack is modulated to radio frequency, and goes out by antenna transmission;
The phase place arrangement for deflecting corresponding with each carrier wave is coupled in corresponding described base band time slot signal generating apparatus and described carrier modulation device respectively, is used to make the base band time slot signal of described base band time slot signal generating apparatus output to produce phase place deflection.
Preferably, described system further comprises:
Distributor is coupled in each phase place arrangement for deflecting respectively, is used to the phase place deflection factor of each allocation of carriers correspondence.
Preferably, described system further comprises:
The deflection factor calculation element is coupled in described distributor, is used for calculating according to the carrier wave number phase place deflection factor of each carrier wave correspondence.
By above technical scheme provided by the invention as can be seen, the present invention is in the TD-SCDMA system, each carrier wave base band time slot signal be multiply by a definite phase place deflection factor respectively, and make the phase place deflection factor of each carrier wave correspondence and carrier frequency that unique corresponding relation be arranged, thereby reduced the probability of radiofrequency signal peak-to-peak superposition, reduce signal peak-to-average ratio, improved the radio-frequency head emitting performance.Because the phase place deflection factor and the carrier frequency of each carrier wave correspondence have unique corresponding relation, therefore during the user side received signal, also only need according to this corresponding relation, can calculate and need the phase deviation that recovers on the work carrier wave, draw the basic midamble sign indicating number that each carrier wave adopts, carry out channel estimating, obtain desired signal.Whole time slot multiply by the scheme of phase place deflection, because what the TD-SCDMA system receiving terminal adopted is coherence detection, as associated detection technique, so user side need not be known the information of phase place deflection, any change that it goes without doing, without any need for inverse operation, this realizes having brought very big benefit to system.
Description of drawings
Fig. 1 is a TD-SCDMA time slot signal structural representation;
Fig. 2 is existing multi-carrier TD-SCDMA system time slot signal forming process schematic diagram;
Fig. 3 is the realization flow figure of the inventive method;
Fig. 4 is each phase place deflection factor distribution schematic diagram when three carrier waves are arranged;
Fig. 5 is the first embodiment theory diagram of system of the present invention;
Fig. 6 is the second embodiment theory diagram of system of the present invention;
Fig. 7 is the 3rd an embodiment theory diagram of system of the present invention.
Embodiment
Core of the present invention is in the TD-SCDMA system, and each carrier wave base band time slot signal be multiply by a definite phase place deflection factor respectively, and makes the phase place deflection factor of each carrier wave correspondence and carrier frequency that unique corresponding relation be arranged.Then, the base band time slot signal after the deflection is launched processing again, to reduce the probability that big peak value appears in the stack of radiofrequency signal peak-to-peak.
In order to make those skilled in the art person understand the present invention program better, the present invention is described in further detail below in conjunction with drawings and embodiments.
With reference to Fig. 3, Fig. 3 shows the realization flow of the inventive method, may further comprise the steps:
Step 301: the base band time slot signal that generates each carrier frequency.
According to the regulation and the business datum of TD-SCDMA standard, generate the base band time slot signal of each carrier frequency.
Step 302: determine that each carrier signal needs the phase place deflection factor of deflection.
Can be fixing phase place deflection factor of each allocation of carriers in advance, distribution principle is: make in a plurality of carrier phases of midamble signal section to reach unanimity or the very little probability of difference reduces, even also each carrier signal probability that big peak value occurs that is superimposed reduces as far as possible.
In actual applications, in the number of having determined system's carrier frequency, and behind the difference on the frequency of each carrier frequency, can determine the phase place deflection factor of each carrier frequency by emulation.
After carrier wave number N determines,, give fixing phase place deflection factor of each allocation of carriers in advance according to the relative size of each carrier frequency.
Such as, the carrier number that certain sub-district is supported is 3 o'clock, can set the phase place deflection factor according to the size of carrier frequency to be: θ+0.5PI, and θ, θ+0.5PI, wherein, θ can be an arbitrary value; For another example, the carrier number that certain sub-district is supported is 4 o'clock, and the phase place deflection factor of setting each carrier wave correspondence is: θ+0.575859PI, θ, θ, θ+0.575859PI.Need to prove that selected phase place all is a snapshot of each carrier phase in the multicarrier phase place rotary course in the example, and be one that makes under the multicarrier situation in the optimum phase value of peak value minimum of Midamble part.At least also there is a value with respect to θ axle conjugation in such optimum phase.The value of optimum phase is not unique, but other value all is on above-mentioned best value basis, has added the phase place rotation result afterwards that carrier frequency formed through the regular hour.In addition, except best value, can also get nonoptimal value, equally can reduce multicarrier PAR peak to average ratio, just the effect relative mistake some.
Can also the phase place deflection factor of each carrier wave correspondence evenly be distributed on a circumference according to the carrier wave number.According to the number N of frequency, the phase place deflection factor that calculates each carrier signal correspondence is:
N=0,1,2 ... N-1.Like this, the phase place deflection factor of each carrier frequency is evenly distributed on the unit circumference, this PHASE DISTRIBUTION peak-to-peak value no longer occurs after the peak value of the midamble signal of each carrier wave is superposeed, and has reduced the probability that the multi-carrier frequency signals peak-to-peak occurs, thereby has reduced the peak-to-average force ratio of multi-carrier frequency signals.
Each carrier wave can from low to high, perhaps from high to low, be sorted according to the size of its frequency, also can be according to the difference size of the frequency of each carrier wave and system centre frequency to each carrier index.
Like this, can determine the phase place deflection factor that it is corresponding, that is to say that each carrier wave and phase place deflection factor have unique corresponding relation according to the numbering of each carrier wave.
Step 303: the base band time slot signal of each carrier frequency be multiply by corresponding phase place deflection factor.
Because TD-SCDMA system radiofrequency signal produces the basic reason of stronger ACLR (side channel leakage power ratio) and is that each carrier wave uses identical scrambler and basic midamble sign indicating number, has produced stronger signal peak power when signal superposes.And multiply by different phase place deflection factors by base band time slot signal with each carrier frequency, and make the phase place of each carrier signal produce different deflection, can reduce the probability that big peak value occurs effectively.
Whole time slot signal all can be multiply by the phase place deflection factor, also can only multiply by corresponding phase place deflection factor at the midamble signal section.
If all multiply by the phase place deflection factor at whole base band time slot signal (comprising two data parts and midamble), so because terminal is a coherent detection, as joint-detection, terminal just it goes without doing any variation so, also need not know the phase place deflection factor of this carrier frequency, and not influence the input of terminal.
If just partly multiply by the phase place deflection factor at the midamle of base band time slot signal sign indicating number, data division is not taken advantage of, and terminal must be known the phase place deflection factor of employed carrier frequency so.
Step 304: the base band time slot signal after the deflection is launched processing.
The front is mentioned, and the base band time slot signal also needs through twice modulation when emission: carrier modulation (perhaps being called intermediate frequency Modulation) and rf modulations.Wherein, carrier modulation is that each carrier signal is modulated on the different frequencies; Rf modulations is to be modulated on the radio frequency through the intermediate frequency broadband signal after the carrier modulation.Go out via antenna transmission through the high-frequency signal after the rf modulations.
Terminal need be known the phase place deflection factor that signal that this terminal receives uses, so that demodulate the right user signal under current frequency when receiving the transmitting of base station.
If the mode that adopts the phase place deflection factor to be uniformly distributed on the circumference is distributed the phase place deflection factor of each carrier wave correspondence, because the phase place deflection factor of each carrier wave correspondence distributes automatically according to the relative size relation of frequency, therefore, terminal only need be known the N frequency points of current area configuration, by the position of frequency in all carrier frequency of carrier frequency of oneself, just can know the phase place deflection factor that signal that this terminal receives uses under current frequency.
If adopt the mode of fixed allocation phase place deflection factor, that is to say that the phase place deflection factor of each carrier wave correspondence is not to be evenly distributed on the circumference, these phase place deflection factors can be identical, also can be different.At this moment, just need the base station to notify terminal by system message, so that terminal demodulates the right user signal according to the phase place deflection factor that the signal that receives uses under current frequency with the phase place deflection factor that distributes.
Be example with 3 carrier frequency below, further describe the processing procedure of the inventive method.
At first, the phase place deflection factor that calculates each carrier frequency according to N=3 is: exp (j0), and exp (j2PI/3), exp (j4PI/3), wherein, PI=3.1415926 is math constant.
The phase place deflection factor of each carrier frequency distributes as shown in Figure 4.
Then, the definite phase place deflection factor separately of frequency size according to each carrier frequency, the base band time slot signal of carrier frequency 1 multiply by phase place deflection factor exp (j0), the base band time slot signal of carrier frequency 2 multiply by phase place deflection factor exp (j2PI/3), and the base band time slot signal of carrier frequency 3 multiply by phase place deflection factor exp (j4PI/3);
Each carrier frequency base band time slot signal multiply by phase place deflection factor separately respectively, carries out Digital IF Processing then, and each carrier signal formation multi-carrier signal that is superimposed carries out rf modulations, launches by antenna.
Fig. 5 shows the theory diagram of first embodiment of system of the present invention:
If system has N carrier signal to need emission simultaneously,, have and the corresponding base band time slot signal of this carrier wave generating apparatus, phase place arrangement for deflecting and carrier modulation device then corresponding to each carrier wave.
As shown in Figure 5, corresponding to carrier wave 1, base band time slot signal generating apparatus S11 generates the base band time slot signal of this carrier wave, then, make the base band time slot signal of base band time slot signal generating apparatus S11 output produce phase place deflection by phase place arrangement for deflecting S12, and then be modulated on the correspondent frequency by the base band time slot signal of carrier modulation device S13 after with deflection.
Corresponding to carrier wave 2, base band time slot signal generating apparatus S21 generates the base band time slot signal of this carrier wave, then, make the base band time slot signal of base band time slot signal generating apparatus S21 output produce phase place deflection by phase place arrangement for deflecting S22, and then be modulated on the correspondent frequency by the base band time slot signal of carrier modulation device S23 after with deflection.
Corresponding to carrier wave N, base band time slot signal generating apparatus SN1 generates the base band time slot signal of this carrier wave, then, make the base band time slot signal of base band time slot signal generating apparatus SN1 output produce phase place deflection by phase place arrangement for deflecting SN2, and then be modulated on the correspondent frequency by the base band time slot signal of carrier modulation device SN3 after with deflection.
Signal superposition device S4 carries out overlap-add procedure to the carrier signal that is modulated on the different frequency, because each phase place arrangement for deflecting has carried out different phase place deflection to each base band time slot signal, therefore, when a plurality of signals superpose, the probability that a plurality of carrier signal midamble part peak-to-peak value stacks produce strong signal peak power will reduce greatly, has improved system's emitting performance.
All carrier signals are modulated on the radio frequency by a multi-carrier signal that will overlap after radio frequency modulating device S15 will superpose, and go out by antenna transmission through after the overlap-add procedure.
In this embodiment, each phase place arrangement for deflecting produces fixing phase place deflection to the base band time slot signal of input.
In order to improve the flexibility of system, also can be to its corresponding phase place deflection factor of each carrier wave Random assignment.
The theory diagram of second embodiment of the system of the present invention that reference is shown in Figure 6:
S6 distributes the phase place deflection factor of each carrier wave correspondence for each phase place arrangement for deflecting by distributor, can have in these phase place deflection factors identical, also difference can be arranged, such as, when 2 carrier waves are arranged, its corresponding phase place deflection factor is set is respectively PI/2, phase place can be any during 0,2 carrier wave; When 3 carrier waves are arranged, its corresponding phase place deflection factor is set is respectively θ+0.5PI, θ, θ+0.5PI; When 4 carrier waves are arranged, its corresponding phase place deflection factor is set is respectively θ+0.575859PI, θ, θ, θ+0.575859PI.Like this, can make system according to different practical application needs, the phase place deflection factor of each carrier wave correspondence is set neatly, multiply each other by the base band time slot signal and the corresponding phase place deflection factor of phase place arrangement for deflecting input, make the base band time slot signal produce phase place deflection, reduce multi-carrier signal produces peak-to-peak value when stack probability.
In order further to reduce the value of multi-carrier signal peak-to-average force ratio when superposeing, the phase place deflection factor of each carrier wave correspondence is uniformly distributed on the circumference, as shown in Figure 4.
The theory diagram of the 3rd embodiment of the system of the present invention that reference is shown in Figure 7:
At first calculate the phase place deflection factor of each carrier wave correspondence according to the numbering of carrier wave number N and each carrier wave by deflection factor calculation element S7:
N=0,1,2 ... N-1, wherein, n is a carrier index.Carrier index can be numbered according to the frequency size order, also can number according to the magnitude relationship of the difference of each frequency and system centre frequency, can certainly adopt other numbering, selects according to actual needs.
After deflection factor calculation element S7 calculates the phase place deflection factor of each carrier wave correspondence, send to distributor S6, for each phase place arrangement for deflecting the phase place deflection factor of each carrier wave correspondence is sent to each phase place arrangement for deflecting by distributor S6 again, the phase place arrangement for deflecting is multiplied by the respective phase deflection factor with the base band time slot signal of input, make the base band time slot signal produce phase place deflection, again the base band time slot signal after the deflection is sent to signal superposition device, multi-carrier signal is carried out overlap-add procedure, at last, multi-carrier signal after the process radio frequency modulating device will superpose is modulated on the radio frequency, and goes out by antenna transmission.
When the terminal received signal, because each phase place deflection factor and carrier wave have certain corresponding relation, therefore, the phase place deflection factor that terminal can be used according to the signal that receives under current frequency at an easy rate demodulates the right user signal.
If all multiply by the phase place deflection factor at the whole time slot signal of transmitting terminal, when then terminal adopted coherence detection to carry out input, any variation that it goes without doing can correct detection signal.
Though described the present invention by embodiment, those of ordinary skills know, the present invention has many distortion and variation and do not break away from spirit of the present invention, wish that appended claim comprises these distortion and variation and do not break away from spirit of the present invention.
Claims (10)
1. a method that sends multi-carrier frequency signals is characterized in that, may further comprise the steps:
A, generate the base band time slot signal of each carrier frequency;
B, determine that each carrier signal needs the phase place deflection factor of deflection;
C, the base band time slot signal of described each carrier frequency be multiply by corresponding phase place deflection factor;
D, the base band time slot signal after the deflection is launched processing.
2. method according to claim 1 is characterized in that, described step B is specially:
Be the fixing phase place deflection factor of each allocation of carriers in advance.
3. method according to claim 1 is characterized in that, described step B is specially:
B1, press pre-defined rule to each carrier index;
B2, determine that according to carrier wave number N and each carrier index n the phase place deflection factor of each carrier wave is:
，n＝0，1，2，...N-1。
4. method according to claim 3 is characterized in that, described step B1 is specially:
According to the frequency size order of each carrier wave to each carrier index.
5. method according to claim 3 is characterized in that, described step B1 is specially:
Obtain the system centre frequency;
According to the difference size of each carrier frequency point and center frequency point to each carrier index.
6. method according to claim 1 is characterized in that, described step C is specially:
The whole base band time slot signal of described each carrier frequency be multiply by corresponding phase place deflection factor.
7. method according to claim 1 is characterized in that, described step C is specially:
The midamble signal section of the base band time slot signal of described each carrier frequency be multiply by corresponding phase place deflection factor.
8. system that sends multi-carrier frequency signals, described system comprises:
The base band time slot signal generating apparatus corresponding with each carrier wave is used to generate the base band time slot signal of each carrier frequency;
The carrier modulation device corresponding with each carrier wave is used for each base band time slot signal is modulated to different frequencies;
Signal superposition device is coupled in each carrier modulation device respectively, is used for the carrier signal that is modulated on the different frequency is carried out overlap-add procedure;
Radio frequency modulating device is coupled in described signal superposition device, is used for the multi-carrier signal after the stack is modulated to radio frequency, and goes out by antenna transmission;
It is characterized in that described system also comprises:
The phase place arrangement for deflecting corresponding with each carrier wave is coupled in corresponding described base band time slot signal generating apparatus and described carrier modulation device respectively, is used to make the base band time slot signal of described base band time slot signal generating apparatus output to produce phase place deflection.
9. system according to claim 8 is characterized in that, described system further comprises:
Distributor is coupled in each phase place arrangement for deflecting respectively, is used to the phase place deflection factor of each allocation of carriers correspondence.
10. according to Claim 8 or 9 described systems, it is characterized in that described system further comprises:
The deflection factor calculation element is coupled in described distributor, is used for calculating according to the carrier wave number phase place deflection factor of each carrier wave correspondence.
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| CN101359945B (en) * | 2007-07-30 | 2012-04-18 | 大唐移动通信设备有限公司 | Method and apparatus lowering peak average ratio |
| CN101383794B (en) * | 2007-09-06 | 2010-12-29 | 大唐移动通信设备有限公司 | Method and apparatus lowering peak average ratio |
| CN101442336B (en) * | 2007-11-19 | 2012-11-14 | 大唐移动通信设备有限公司 | Method and apparatus for reducing peak-to-average ratio |
| CN101534274B (en) * | 2008-03-12 | 2011-07-20 | 大唐移动通信设备有限公司 | Method for reducing peak-to-average power ratio in mobile communication system and device thereof |
| CN102461279A (en) * | 2009-06-05 | 2012-05-16 | 爱立信(中国)通信有限公司 | Method of and base station for reducing peak - to - average power ratio for a multicarrier transmission |
| CN101984615A (en) * | 2010-11-19 | 2011-03-09 | 京信通信系统（中国）有限公司 | Device for reducing peak-to-average power ratio and method and application thereof |
| WO2012100377A1 (en) * | 2011-01-30 | 2012-08-02 | Telefonaktiebolaget L M Ericsson (Publ) | A method and arrangement for training sequence allocation |
| KR20230074299A (en) | 2011-02-18 | 2023-05-26 | 선 페이턴트 트러스트 | Method of signal generation and signal generating device |
| CN111294307A (en) * | 2019-07-15 | 2020-06-16 | 锐迪科创微电子（北京）有限公司 | Signal transmission method and device, storage medium and user terminal |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1222276A (en) * | 1996-04-19 | 1999-07-07 | 阿马提通信有限公司 | Digital radio frequency interference canceller |
| CN1394018A (en) * | 2001-06-27 | 2003-01-29 | 华为技术有限公司 | Method for controlling compression mode according to power of mobile station |
| CN1462519A (en) * | 2001-05-14 | 2003-12-17 | 松下电器产业株式会社 | Multi-carrier communication method and multi-carrier communication apparatus |
| CN1647452A (en) * | 2002-04-16 | 2005-07-27 | 西门子公司 | Method for testing subscriber connection lines for broadband services |
-
2005
- 2005-10-18 CN CN200510109411A patent/CN1953361B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1222276A (en) * | 1996-04-19 | 1999-07-07 | 阿马提通信有限公司 | Digital radio frequency interference canceller |
| CN1462519A (en) * | 2001-05-14 | 2003-12-17 | 松下电器产业株式会社 | Multi-carrier communication method and multi-carrier communication apparatus |
| CN1394018A (en) * | 2001-06-27 | 2003-01-29 | 华为技术有限公司 | Method for controlling compression mode according to power of mobile station |
| CN1647452A (en) * | 2002-04-16 | 2005-07-27 | 西门子公司 | Method for testing subscriber connection lines for broadband services |
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