CN102014086A - Base station signal transmission processing method and base station transmitter - Google Patents
Base station signal transmission processing method and base station transmitter Download PDFInfo
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Abstract
The invention discloses a base station signal transmission processing method and a base station transmitter. The base station signal transmission processing method comprises the following steps of: when at least more than two carrier spacings exist, grouping transmitting signals according to the carrier spacings, wherein carriers in each group have the same signal transmission bandwidth; respectively carrying out channel filtration on the grouped transmitting signals through corresponding channel filters; combining the output signals of each channel filter; and inputting the combined signal into a digital-analog converter. By adjusting the structures of the channel filters for base station signal transmission, the invention is suitable for the TD-SCDMA (Time Division-Synchronous Code Division Multiple Access) multi-carrier application with unequal carrier spacings and overcomes the influence of adjacent-channel interference on the performance of the base station transmitter in the application of the unequal carrier spacings when the carrier spacings are compressed, wherein the adjacent-channel interference is caused by overlapping adjacent frequency spectrums.
Description
Technical field
The present invention relates to wireless signal transmission, particularly a kind of base station signal transmission processing method and base station transmitter.
Background technology
Present 3GPP (3rd Generation Partnership Project, the 3rd generation collaborative project) standard recommendation TD-SCDMA (Time Division Synchronous CDMA, time-division is synchronous--and code division multiple access inserts) the system centre carrier wave is the integral multiple of frequency resolution (Channel Raster), carrier spacing is 1.6MHz, base station receives based on identical frequency with terminal, specifically can be referring to 3GPP TS 25.105V8.3.1, " Base Station (B S) radio transmission and reception (TDD) (Release 8).When the design transmission system, adapt with the carrier spacing, all carrier waves of scheme (no matter the still auxilliary carrier wave of main carrier) all adopt identical channel model at present, send 99% of signal spectra energy to guarantee to comprise in the transmission bandwidth (Occupied Bandwidth).The TD-SCDMA system sends the formed filter roll-off factor and adopts 0.22 at present, so transmission bandwidth is (1+0.22) * 1.28MHz=1.5616, and approximate 1.6MHz.
Fig. 1 is example for being that uniformly-spaced carrier frequency point at interval distributes schematic diagram with 1.6MHz with A frequency range (2010MHz-2025MHz) 15MHz frequency spectrum resource, and concrete frequency spectrum planning as shown in Figure 1.Wherein, 2011,2012.6 and 2014.2 is the indoor application frequency, and 2016-2024 is the outdoor utility frequency.Main carrier can be arbitrary frequency of since 2011 to 2024, and the isolation of 200KHz is arranged between outdoor frequency range and the indoor frequency range, and being used for the outdoor and indoor frequency spectrum carrier spacing is 1.6MHz.Wherein A11 and A17 are the protection frequency band of A frequency range and other frequency range; A12 represents the indoor application frequency, and A15 represents the frequency of outdoor utility; A13 represents the protection frequency band of indoor application and outdoor utility, and A14 represents channel model, and the cut-off frequency of this filter is corresponding to above-mentioned transmission bandwidth, and A16 represents corresponding carrier frequency point.
Fig. 2 is same channel model implementation schematic diagram for time division multiplexing adopts, and as shown in Figure 2, the implementation method of channel model is channel model of multicarrier baseband signal time division multiplexing at present.The prerequisite hypothesis of its realization is that the transmission bandwidth of different carrier is identical, and spectrum mask is identical, the adjacent unanimity of controlling consumption of disturbing frequently.
Therefore the deficiencies in the prior art are: do not consider the application of same channel filtering implementation descending asymmetric transmission bandwidth when not waiting the carrier spacing, have the following disadvantages at least during descending asymmetric transmission bandwidth when not waiting the carrier spacing:
Same channel model transmission bandwidth causes EVM (Error Vector Magnitude, the vector error amplitude) performance of different carrier to have than big-difference;
Same channel model can cause transmission bandwidth and carrier spacing not to match, thus the adjacent difference of disturbing frequently that different carrier is subjected to;
Same channel model transmission bandwidth can cause the carrier spacing to compress 3GPP TS 25.105V8.3.1 standard recommendation is not satisfied in the back at transmission bandwidth cut-off frequency point spectrum mask requirement.
Summary of the invention
The invention provides a kind of base station signal transmission processing method and base station transmitter, the emission processing scheme of downstream signal when not waiting the carrier spacing in order to be provided at.
A kind of base station signal transmission processing method is provided in the embodiment of the invention, has comprised the steps:
When two or more at least carrier spacing was arranged, according to the carrier spacing grouping that will transmit, after the grouping, the signal transmission bandwidth in each group on each carrier wave was identical;
Transmitting after the grouping carried out channel filtering through corresponding channel model respectively;
The output signal of each channel model is merged;
With the signal input digital to analog converter after merging.
A kind of base station transmitter is provided in the embodiment of the invention, has comprised:
Grouping module is used for when two or more at least carrier spacing is arranged, and according to the carrier spacing grouping that will transmit, after the grouping, the signal transmission bandwidth in each group on each carrier wave is identical;
Bank of filters comprises and the corresponding channel model of group number that transmits after dividing into groups, and is used for corresponding channel model transmitting after dividing into groups being carried out channel filtering;
Merge module, be used for the output signal of described each filter of bank of filters is merged, and the input of the signal after will merging digital to analog converter.
A kind of base station signal transmission processing method is provided in the embodiment of the invention, has comprised the steps:
When two or more at least carrier spacing is arranged, will transmit through channel model, described channel model is the carrier spacing after transmission bandwidth is not more than compression, the carrier spacing after the compression is less than 1.6MHz;
Output signal input digital to analog converter with channel model.
A kind of base station transmitter is provided in the embodiment of the invention, has comprised:
Channel model is used for carrying out channel filtering to transmitting when two or more at least carrier spacing is arranged, and described channel model is the carrier spacing after transmission bandwidth is not more than compression, and the carrier spacing after the compression is less than 1.6MHz;
Digital to analog converter is used to receive the output signal of described channel model.
Beneficial effect of the present invention is as follows:
In the technical scheme that the embodiment of the invention adopted, adapt to the TD-SCDMA multicarrier that does not wait the carrier spacing by adjustment and use, overcome the adjacent frequency that causes owing to the adjacent spectra aliasing when not waiting carrier spacing to use when compressing and disturbed the base station transmitter Effect on Performance in the carrier spacing to base station channel model structure.
Description of drawings
Fig. 1 is for being that uniformly-spaced carrier frequency point at interval distributes schematic diagram with 1.6MHz in the background technology;
Fig. 2 adopts same channel model implementation schematic diagram for time division multiplexing in the background technology;
Fig. 3 is in the embodiment of the invention with 1.6MHz+1.4MHz being carrier spacing at interval and the transmission bandwidth spectral aliasing schematic diagram that do not match;
Fig. 4 is for being the carrier spacing at interval to mate the spectral aliasing schematic diagram with transmission bandwidth with 1.6MHz+1.4MHz in the embodiment of the invention;
Adjacent frequency did not disturb schematic diagram when Fig. 5 matched for carrier spacing in the embodiment of the invention and transmission bandwidth;
Fig. 6 is that TD-SCDMA system spectrum template is adjusted schematic diagram in the embodiment of the invention;
Fig. 7 is a base station signal transmission processing method implementing procedure schematic diagram in the embodiment of the invention;
Fig. 8 is an aggregate channel filter scheme schematic diagram in the embodiment of the invention;
Fig. 9 is a base station transmitter structural representation in the embodiment of the invention;
Figure 10 is a base station signal transmission processing method implementing procedure schematic diagram in the embodiment of the invention;
Figure 11 is a base station transmitter structural representation in the embodiment of the invention;
Figure 12 is an embodiment of the invention intermediate frequency spectrum template schematic diagram.
Embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described.
The inventor notices in the invention process:
Fig. 3 is for being carrier spacing of example and the transmission bandwidth spectral aliasing schematic diagram that do not match with 1.6MHz+1.4MHz, and A frequency range shown in Figure 3 is example with 1.6MHz+1.4MHz; Fig. 4 is for being carrier spacing at interval and transmission bandwidth coupling spectral aliasing schematic diagram with 1.6MHz+1.4MHz, and A frequency range shown in Figure 4 is example with 1.6MHz+1.4MHz.Be applied as example explanation with the A band networking of distributing to TD-SCDMA, when indoor or outdoor utility carrier spacing no longer were uniform 1.6MHz, for example outdoor carrier spacing was when being reduced into 1.4MHz, received transmission bandwidth this moment and had two kinds of 1.6MHz and 1.4MHz.Wherein A21 and A31, A27 and A37 are the protection frequency band of A frequency range and other frequency range; A22 and A32 represent the indoor application frequency, and A25 and A35 represent the frequency of outdoor utility; A23 and A33 represent the protection frequency band of indoor application and outdoor utility, and A24 and A34 represent the channel model of corresponding transmission bandwidth, and wherein the A24 representative is corresponding to the channel model in 1.6MHz carrier spacing, and A26 and A36 represent corresponding carrier frequency point.As seen from the figure, can think that the spectral aliasing the when carrier spacing does not match with transmission bandwidth is more serious than when coupling, not consider that here transmission bandwidth is less than the application scenarios in carrier spacing, because this configuration runs in the opposite direction with the demand that improves spectrum utilization efficiency.
Adjacent frequency did not disturb schematic diagram when Fig. 5 matched for carrier spacing and transmission bandwidth, be applied as example with the A band networking of distributing to TD-SCDMA, when transmission bandwidth still is 1.6MHz, owing to the carrier spacing compression makes some carrier waves and adjacent interval frequently and transmission bandwidth not match, cause this moment centered carrier received signal frequency spectrum to comprise more interference, as shown in Figure 5 from other frequency.A42 represents to satisfy 3GPP and advises spectrum mask and the channel model frequency spectrum that is complementary with transmission bandwidth, A41 represents the channel model frequency spectrum that the carrier spacing after the transmission bandwidth that redesigns and the compression is complementary, A44 is depicted as the transmit signal power spectrum density of correspondence when satisfying the requirement of 3GPP standard transmission bandwidth, and Δ f is the carrier spacing.B22 represents to fall the interior adjacent interference frequently of the shared transmission bandwidth of centered carrier f0 of A41 indication.It is outer and fall adjacent in the A42 band and disturb frequently that B21 and B23 represent to drop on the A41 band, the power spectrum decay of penetrating signal is little because the neighbour that B21 and B22 respective frequencies are comprised takes place frequently, the proportion that this part adjacent energy that disturbs frequently accounts for total interference is higher, directly causing satisfying requirement of frequency spectrum masterplate and terminal ACS (Adjacent Channel Selectivity, adjacentchannel selectivity) index worsens.Not matching with above-mentioned 1.6MHz channel model and 1.4MHz transmission bandwidth is example, face disturb frequently will additionally comprise about adjacent each 100KHz frequently strong jamming of 200KHz altogether, laboratory tests show: ACS will deteriorate into 28dBc from 50dBc.
Fig. 6 is that TD-SCDMA system spectrum template is adjusted schematic diagram, and the spectrum mask of 3GPP suggestion at present is reference with the 1.6MHz transmission bandwidth, and the channel model design will meet the spectrum mask requirement.Reduce when the carrier spacing, if spectrum mask remains unchanged, channel model also designs the problem that above-mentioned ACS deterioration then can occur only to satisfy the spectrum mask demand.And if assurance ACS does not worsen, then need to design channel filter bandwidth and carrier spacing coupling, if the spectrum mask that do not revise the 3GPP normalized definition this moment is to adapt to the new carrier spacing, then its existence will no longer include meaning.Fig. 6 is the spectrum mask signal of different carrier under at interval, and 3GPP suggestion spectrum mask A52 will further be offset to position shown in the A51 to centered carrier to the constraint of transmission bandwidth external signal power spectrum.Clearly, spectrum mask A51 is high more a lot of than A52 to the requirement that the neighbour suppresses frequently, and this also causes the design difficulty of channel model to strengthen.
From the assessment to EVM, bandwidth is constant, and along with carrier number increases, transmission bandwidth reduces, EVM minimum when carrier spacing and channel filter bandwidth coupling.As shown in Table 1, suppose that the unequal interval carrier wave is configured to [4.3 ,-2.9,-1.5,0 ,+1.5, + 2.9, + 4.3], wherein [0] is the centered carrier position, represents that also side-play amount is 0, other value is the frequency shift (FS) of relative centered carrier, "-" expression centered carrier offsets downward, the upwards skew of "+" expression centered carrier, and side-play amount unit is MHz.Promptly working as the base station carrier number increases, but channel filter bandwidth remains unchanged.When the transmission bandwidth of center carrier wave is 1.6MHz, the BTS channel filter bandwidht is 1.6MHz.By simulation result as seen, the EVM of different carrier has notable difference, the EVM minimum of centered carrier (No. 4, the corresponding frequencies side-play amount is 0), and the EVM of other carrier waves obviously increases, and No. 2 carrier waves worsen than the EVM of No. 4 carrier waves and reach 5%.The adjacent interference frequently that this moment, obvious No. 2 carrier waves were subjected to is the most serious, because two carrier waves (1 and 3) and its frequency interval adjacent with it are 1.4MHz, and channel filter bandwidth is 1.6MHz, and as Fig. 5 explanation, the outer more interference signal of the 1.4MHz bandwidth of expectation causes EVM to worsen.
EVM simulation result during the configuration of table one unequal interval carrier wave
| Carrier number | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| EVM[％] | 5.8301 | 7.2333 | 5.1805 | 2.9868 | 5.4601 | 6.8847 | 5.7066 |
In sum, there is following problems in present same channel filtering implementation for not waiting descending asymmetric transmission bandwidth of carrier spacing to use:
1, same channel model transmission bandwidth causes the EVM performance of different carrier to have than big-difference, as shown in Table 1;
2, same channel model can cause transmission bandwidth and carrier spacing not to match, thus the adjacent difference of disturbing frequently that different carrier is subjected to, as shown in Figure 6;
3, same channel model transmission bandwidth can cause being discontented with sufficient spectrum mask requirement at transmission bandwidth by frequency after the carrier spacing compression, as shown in Figure 5.
The base station transmit signals frequency spectrum was subjected to adjacent interference frequently and can significantly reduces when transmission bandwidth was no more than the carrier spacing in principle.So when the carrier spacing is compressed,, suppress adjacent and disturb frequently, provided following two kinds of schemes in the embodiment of the invention and solved the problem that above-mentioned prior art exists in order to satisfy the spectrum mask requirement.
Channel model in the embodiment of the invention refers to any single filter or multirate filter, or the combination of various filters, in order to realize emission spectrum molding filtration and sample rate conversion, the spectrum mask of mentioning in the embodiment of the invention is satisfied with in its total frequency response.
Fig. 7 is a base station signal transmission processing method implementing procedure schematic diagram, and as shown in the figure, the base station can comprise the steps: when signal is launched
In the enforcement, channel model can be time-multiplexed filter.
In the enforcement, when the TD-SCDMA downstream signal was launched, main carrier can adopt different channel models with auxilliary carrier wave.
In the enforcement, the carrier spacing can be 1.6MHz and/or 1.4MHz.
Fig. 8 is an aggregate channel filter scheme schematic diagram, as shown in the figure, in this programme is implemented, to transmit according to the carrier spacing and to be divided into different groups, N carrier transmit signal can be divided into the L group according to the carrier spacing, each group signal has identical transmission bandwidth requirement, and behind the identical channel model of time division multiplexing, output signal merges the transmission signals that forms in the whole bandwidth and enters digital to analog converter.This scheme is fit to the TD-SCDMA application scenarios that the unequal interval carrier frequency point distributes.Fig. 4 is 10 carrier waves and is divided into 2 groups example.This programme also can satisfy the demand that spectrum mask is adjusted with the transmission bandwidth change dynamics simultaneously.
In grouping was implemented, when being divided into the L group according to the carrier spacing, the signal transmission bandwidth in each group on each carrier wave was identical.Consider the transmission bandwidth of carrier wave during grouping, in fact be equivalent to the frequency interval of considering between carrier wave and the carrier wave.Because the influence of filter, in the wireless communication system of reality, it is to avoid this carrier signal to influence the Compulsory Feature of adjacent carrier that the carrier transmission bandwidth is not more than the intercarrier frequency interval.
With reference to figure 5, if do not divide into groups, then all carrier waves are by same channel model, this channel filter bandwidth must be not less than has maximum transmission bandwidth, and the carrier wave that has less transmission bandwidth this moment will comprise more interference from adjacent carrier through behind this filter, can be with reference to figure 6 and table one data.The modulation signal of the carriers carry that grouping back transmission bandwidth is identical just can reduce out of band spectrum by the channel filtering that matches and leak, and reduces the neighbour and disturbs frequently.
Concrete implementation result can be the carrier spacing and the transmission bandwidth coupling spectral aliasing schematic diagram of example with 1.6MHz+1.4MHz referring to Fig. 4.
Based on same inventive concept, a kind of base station transmitter also is provided in the embodiment of the invention, because the principle that base station transmitter is dealt with problems is similar to the base station signal transmission processing method, so the enforcement of base station transmitter can repeat part and not give unnecessary details referring to the enforcement of method.
Fig. 9 is the base station transmitter structural representation, as shown in the figure, can comprise in the base station transmitter:
Bank of filters 902 comprises and the corresponding channel model of group number that transmits after dividing into groups, and is used for corresponding channel model transmitting after dividing into groups being carried out channel filtering;
In the enforcement, channel model can be time-multiplexed filter.
In the enforcement, when the TD-SCDMA downstream signal was launched, bank of filters can comprise different channel models on main carrier and auxilliary carrier wave.
In the enforcement, grouping module can be further used for according to the carrier spacing be 1.6MHz and/or the 1.4MHz grouping that will transmit.
Below the embodiment of another kind of base station signal transmission processing method provided by the invention and base station transmitter describe.
Figure 10 is a base station signal transmission processing method implementing procedure schematic diagram, and as shown in the figure, the base station can comprise the steps: when signal is launched
Step 1001, when two or more at least carrier spacing is arranged, will transmit through channel model, described channel model is the carrier spacing after transmission bandwidth is not more than compression, the carrier spacing after the compression is less than 1.6MHz;
Step 1002, with the output signal of channel model input digital to analog converter.
In the enforcement, channel filter bandwidth satisfies signal bandwidth, and filter cutoff frequency is less than the carrier spacing.
In the enforcement, when the TD-SCDMA downstream signal was launched, main carrier adopted different channel models with auxilliary carrier wave.
In the enforcement, the carrier spacing is 1.6MHz and/or 1.4MHz.
In the implementation of prior art, it be (1+0.22) * 1.28 or greater than the channel model in the carrier spacing after compressing that base station transmitter adopts transmission bandwidth, in the embodiment of the invention it is defined as wideband channel filter, in order to difference provided in the embodiment of the invention the narrow band channel filter.The narrow band channel filter of indication is the carrier spacing after transmission bandwidth is not more than compression in the embodiment of the invention, and the carrier spacing after the compression is less than the channel model of 1.6MHz.In the enforcement,, all adopt identical narrow band channel filter no matter whether the N carrier spacing is identical.At this moment, transmission bandwidth and carrier spacing coupling, all transmit and all use the channel model based on new spectrum mask design to handle, can effectively reduce the in-band adjacent-channel that transmits and disturb and be with outer ACLR (Adjacent Channel Leakage power Ratio, Adjacent Channel Leakage Power Ratio), transmit and receive performance and be optimum.
In the invention process, different carrier waves adopts identical channel model, no matter there is the how many kinds of carrier spacing all to adopt a kind of channel model.Because system is after the carrier spacing compression at present, consider many-sided reasons such as existing network application, realization, cost, transmission bandwidth does not satisfy the requirement that is not more than the carrier spacing as previously mentioned, but keep transmission bandwidth constant, will cause defective previously discussed like this, the promptly big adjacent ACS performance rapid deterioration that causes terminal to receive that disturbs frequently.Technical scheme proposed by the invention has then been avoided this problem.
Based on same inventive concept, a kind of base station transmitter also is provided in the embodiment of the invention, because the principle that base station transmitter is dealt with problems is similar to the base station signal transmission processing method, so the enforcement of base station transmitter can repeat part and not give unnecessary details referring to the enforcement of method.
Figure 11 is the base station transmitter structural representation, as shown in the figure, can comprise in the base station transmitter:
Channel model 1101 is used for carrying out channel filtering to transmitting when two or more at least carrier spacing is arranged, and described channel model is the carrier spacing after transmission bandwidth is not more than compression, and the carrier spacing after the compression is less than 1.6MHz;
Digital to analog converter 1102 is used to receive the output signal of described channel model.
In the enforcement, channel filter bandwidth satisfies signal bandwidth, and filter cutoff frequency is less than the carrier spacing.
In the enforcement, when the TD-SCDMA downstream signal is launched, on main carrier and auxilliary carrier wave, can adopt different channel models.
In the enforcement, it is that transmitting of 1.6MHz and/or 1.4MHz carried out channel filtering that channel model can also be further used for the carrier spacing.
The technical scheme that provides in the embodiment of the invention is at not waiting possible application scenarios of carrier spacing to be listed below; all following carrier spacing application modes that do not wait are all applicable, and the carrier spacing of not waiting does not here comprise the protection interval of the 100KHz-200KHz between the indoor and outdoors application scenarios in the practical application.Being applied as example with 1.6MHz and 1.4MHz transmission bandwidth then has:
A, N frequency (as 1.6MHz*N) uniformly-spaced;
B, unequal interval N+M frequency (as 1.4MHz*N+1.6MHz*M);
Detailed application scenarios is described as follows:
(1), base-station transmission band width and carrier spacing are inconsistent.
A, 1.6MHz uniformly-spaced carrier wave use;
B, 1.4MHz uniformly-spaced carrier wave use;
C, 1.4MHz*N+1.6MHz*M do not wait the carrier spacing to use.
(2), base station and terminal transmission bandwidth and carrier spacing are inconsistent.
D, 1.6MHz uniformly-spaced carrier wave use;
E, 1.4MHz uniformly-spaced carrier wave use;
F, 1.4MHz*N+1.6MHz*M do not wait the carrier spacing to use.
(3), the base station is consistent with terminal transmission bandwidth and carrier spacing.
G, 1.6MHz uniformly-spaced carrier wave use;
H, 1.4MHz uniformly-spaced carrier wave use.
" inconsistent " of indication is defined as transmission bandwidth greater than all situations in carrier spacing in the embodiment of the invention, and transmission bandwidth is the Occupied Bandwidth of 3GPP definition.
From the above, in the invention process, the application of unequal interval multicarrier is realized in the TD-SCDMA base station based on flexible carrier bandwidths composite design filter.
Also can be that the application of the multicarrier of descending asymmetric transmission is realized in the TD-SCDMA base station based on narrow bandwidth designing filter more.
Further, in the descending application of TD-SCDMA, main carrier can adopt different channel models with auxilliary carrier wave.
Though be example in TD-SCDMA multicarrier system with 1.6MHz and 1.4MHZ in the embodiment of the invention, be not limited to this two kinds of bandwidth, but be applicable to the application of all multi-carrier downlinks under the asymmetric carrier spacing; With 1.6MHz and 1.4MHZ is that example is that TD-SCDMA is 1.6MHz at present because bandwidth is worked out the standard that comes from, and all can be used as at TD-SCDMA constraint frequency point ranges from the frequency of all between the 1.28MHz-1.6MHz in view of the principle.
" all multi-carrier downlinks asymmetric carrier spacing use " can separated into two parts, and the one, " all multi-carrier downlinks " refers to " the descending base station that adopts multi-carrier transmission "; The 2nd, " asymmetric carrier spacing use " refers to " transmission bandwidth and carrier spacing do not match, descending base station carrier transmission bandwidth and terminal receive transmission bandwidth and do not match ".All can use technical scheme provided by the invention at these two kinds of application scenarioss.
Further, for using, the TD-SCDMA that adapts to the compression carrier spacing also can redesign the spectrum mask that satisfies narrower transmission bandwidth; Figure 12 spectrum mask schematic diagram is the spectrum mask modified example at the TD-SCDMA system shown in the figure.
Among the figure, Power Density in 30kHz[dBm] be meant power spectral density [dBm/30KHz].Refer to the spectrum energy of on the 30KHz bandwidth, measuring, so power spectrum is more accurate, if be that unit also can regard the power spectrum signal on every 30KHz as still, so can be expressed as power spectral density [dBm/30KHz] with 30KHz.
Frequency separation Δ f from the carrier[MHz] be meant relative carrier frequency offset Δ f[MHz].
To sum up, adopt technical scheme provided by the invention, adapt to the TD-SCDMA multicarrier that does not wait the carrier spacing by adjustment and use, overcome the adjacent frequency that causes owing to the adjacent spectra aliasing when not waiting carrier spacing to use when compressing and disturbed the base station transmitter Effect on Performance in the carrier spacing to base station channel model structure.
Those skilled in the art should understand that embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt complete hardware embodiment, complete software implementation example or in conjunction with the form of the embodiment of software and hardware aspect.And the present invention can adopt the form that goes up the computer program of implementing in one or more computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) that wherein include computer usable program code.
The present invention is that reference is described according to the flow chart and/or the block diagram of method, equipment (system) and the computer program of the embodiment of the invention.Should understand can be by the flow process in each flow process in computer program instructions realization flow figure and/or the block diagram and/or square frame and flow chart and/or the block diagram and/or the combination of square frame.Can provide these computer program instructions to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, make the instruction of carrying out by the processor of computer or other programmable data processing device produce to be used for the device of the function that is implemented in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame appointments.
These computer program instructions also can be stored in energy vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work, make the instruction that is stored in this computer-readable memory produce the manufacture that comprises command device, this command device is implemented in the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.
These computer program instructions also can be loaded on computer or other programmable data processing device, make on computer or other programmable devices and to carry out the sequence of operations step producing computer implemented processing, thereby the instruction of carrying out on computer or other programmable devices is provided for being implemented in the step of the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.
Although described the preferred embodiments of the present invention, in a single day those skilled in the art get the basic creative notion of cicada, then can make other change and modification to these embodiment.So claims are intended to all changes and the modification that are interpreted as comprising preferred embodiment and fall into the scope of the invention.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (16)
1. a base station signal transmission processing method is characterized in that, comprises the steps:
When two or more at least carrier spacing was arranged, according to the carrier spacing grouping that will transmit, after the grouping, the signal transmission bandwidth in each group on each carrier wave was identical;
Transmitting after the grouping carried out channel filtering through corresponding channel model respectively;
The output signal of each channel model is merged;
With the signal input digital to analog converter after merging.
2. the method for claim 1 is characterized in that, described channel model is time-multiplexed filter.
3. the method for claim 1 is characterized in that, when the TD-SCDMA downstream signal was launched, main carrier adopted different channel models with auxilliary carrier wave.
4. as the arbitrary described method of claim 1 to 3, it is characterized in that the described carrier spacing is 1.6MHz and/or 1.4MHz.
5. a base station transmitter is characterized in that, comprising:
Grouping module is used for when two or more at least carrier spacing is arranged, and according to the carrier spacing grouping that will transmit, after the grouping, the signal transmission bandwidth in each group on each carrier wave is identical;
Bank of filters comprises and the corresponding channel model of group number that transmits after dividing into groups, and is used for corresponding channel model transmitting after dividing into groups being carried out channel filtering;
Merge module, be used for the output signal of described each filter of bank of filters is merged, and the input of the signal after will merging digital to analog converter.
6. base station transmitter as claimed in claim 5 is characterized in that, described channel model is time-multiplexed filter.
7. base station transmitter as claimed in claim 5 is characterized in that, described bank of filters when the TD-SCDMA downstream signal is launched, comprises different channel models on main carrier and auxilliary carrier wave.
8. as the arbitrary described base station transmitter of claim 5 to 7, it is characterized in that, described grouping module be further used for according to the carrier spacing be 1.6MHz and/or the 1.4MHz grouping that will transmit.
9. a base station signal transmission processing method is characterized in that, comprises the steps:
When two or more at least carrier spacing is arranged, will transmit through channel model, described channel model is the carrier spacing after transmission bandwidth is not more than compression, the carrier spacing after the compression is less than 1.6MHz;
Output signal input digital to analog converter with channel model.
10. method as claimed in claim 9 is characterized in that described channel filter bandwidth satisfies signal bandwidth, and filter cutoff frequency is less than the carrier spacing.
11. method as claimed in claim 9 is characterized in that, when the TD-SCDMA downstream signal was launched, main carrier adopted different channel models with auxilliary carrier wave.
12., it is characterized in that the described carrier spacing is 1.6MHz and/or 1.4MHz as the arbitrary described method of claim 9 to 11.
13. a base station transmitter is characterized in that, comprising:
Channel model is used for carrying out channel filtering to transmitting when two or more at least carrier spacing is arranged, and described channel model is the carrier spacing after transmission bandwidth is not more than compression, and the carrier spacing after the compression is less than 1.6MHz;
Digital to analog converter is used to receive the output signal of described channel model.
14. base station transmitter as claimed in claim 13 is characterized in that, described channel filter bandwidth satisfies signal bandwidth, and filter cutoff frequency is less than the carrier spacing.
15. base station transmitter as claimed in claim 13 is characterized in that, when the TD-SCDMA downstream signal is launched, adopts different channel models on main carrier and auxilliary carrier wave.
16., it is characterized in that it is that transmitting of 1.6MHz and/or 1.4MHz carried out channel filtering that described channel model was further used for the carrier spacing as the arbitrary described base station transmitter of claim 13 to 15.
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| WO2013155831A1 (en) * | 2012-04-20 | 2013-10-24 | 华为技术有限公司 | Wireless local network (wlan) device and method for suppressing interference by wlan device |
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| WO2018058678A1 (en) * | 2016-09-30 | 2018-04-05 | 华为技术有限公司 | Signal processing method and device |
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