CN101291313A - Wireless signal transmitting method, system and mobile station - Google Patents
Wireless signal transmitting method, system and mobile station Download PDFInfo
- Publication number
- CN101291313A CN101291313A CNA2007101486996A CN200710148699A CN101291313A CN 101291313 A CN101291313 A CN 101291313A CN A2007101486996 A CNA2007101486996 A CN A2007101486996A CN 200710148699 A CN200710148699 A CN 200710148699A CN 101291313 A CN101291313 A CN 101291313A
- Authority
- CN
- China
- Prior art keywords
- coding
- wireless signal
- interleaver
- different
- subelement
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Abstract
The invention relates to the wireless communication field and discloses a wireless signal transmission method, a wireless signal transmission system and a wireless signal transmission mobile station, which further improve the utilization rate of frequency spectra in an OFDM-based system. The method is as follows: multipath data streams are respectively encoded; encoding results of various paths are respectively interweaved by utilization of different interweavers; encoding results of various paths are modulated on the same time frequency resource by means of OFDM and then transmitted; the data streams are divided into a plurality of sets; and different data streams on the same time frequency resource are distinguished in each set through different interweaving means and different sets use different time frequency resources. The encoding means comprises spread spectrum coding, repeated coding, debugging coding and so on; DFT conversion can be performed on interweaving results at first and then OFDM modulation can be performed on the interweaving results; long interweavers can be formed by concatenation of a plurality of short interweavers; and the multipath data streams are different layers of data streams in the same mobile station and also can be data streams of different mobile stations.
Description
Technical field
The present invention relates to wireless communication field, particularly based on the OFDM signal transmission technology of (OrthogonalFrequency Division Multiplexing is called for short " OFDM ").
Background technology
In the last few years, be subjected to people's extensive concern for the multi-carrier transmission technology of representative with OFDM (Orthogonal Frequency Division Multiplexing is called for short " OFDM ").In fact OFDM is a kind of of multi-carrier modulation (Multi-Carrier Modulation is called for short " MCM ").Its main thought is: channel is divided into some orthogonal sub-channels, converts high-speed data signal to parallel low speed sub data flow, be modulated on each subchannel and transmit.Orthogonal signalling can be come separately by adopt correlation technique at receiving terminal, can reduce interchannel interference mutual between the subchannel (InterChannel Interference is called for short " ICI ") like this.Signal bandwidth on each subchannel is less than the correlation bandwidth of channel, so can regard the flatness decline as on each subchannel, thereby can eliminate intersymbol interference.And because the bandwidth of each subchannel only is the sub-fraction of former channel width, so channel equalization becomes relatively easy.
Can realize multiple access on the basis of OFDM, promptly OFDM inserts (OrthogonalFrequency Multiple Access is called for short " OFDMA ").The problem that multiple access technology solves is, in mobile communication system, there are many travelling carriages to communicate by a base station and other travelling carriages simultaneously, thereby must give different features to the signal that send different mobile stations and base station, it is the signal which travelling carriage sends that the base station can be distinguished from the signal of numerous travelling carriages, and which is a signal of issuing oneself in the signal that sends the base station and each travelling carriage can identify.
The present inventor finds, the frequency spectrum based on the system of OFDM also is not fully utilized at present, and the availability of frequency spectrum also has the possibility that further improves.
Summary of the invention
The technical problem underlying that embodiment of the present invention will solve provides a kind of wireless signal transmitting method, system and travelling carriage, makes that the availability of frequency spectrum based on the system of OFDM is further enhanced.
For solving the problems of the technologies described above, embodiments of the present invention provide a kind of wireless signal transmitting method, comprise following steps:
At least two paths of data flow point is not carried out the coding of redundancy, use different interleavers to interweave respectively to the coding result on each road, the Jiang Gelu result that interweaves is modulated on the identical running time-frequency resource in the orthogonal frequency division multiplex OFDM mode and launches.
Embodiments of the present invention also provide a kind of wireless signal transmission system, comprise:
N coding unit is respectively applied for N circuit-switched data stream carried out the redundancy coding;
N different interleaver, the coding result that is respectively applied for each coding unit output interweaves;
Transmitter unit is used for the result that interweaves with the output of each interleaver and is modulated on the identical running time-frequency resource in the OFDM mode and launches;
Wherein, N is the integer greater than 1.
Embodiments of the present invention also provide a kind of travelling carriage, comprise:
Coding unit is used for data stream is carried out the redundancy coding;
Interleaver is used for the coding result of coding unit output is interweaved;
Transmitter unit is used for the result that interweaves with interleaver output and is modulated on the running time-frequency resource of sharing with other travelling carriage in the OFDM mode and launches.
Embodiments of the present invention also provide a kind of wireless signal transmitting method, use method mentioned above to launch respectively to each group in K the set of streams, wherein, different set of streams is used different running time-frequency resources, K is the integer more than or equal to 2, comprises two paths of data stream at least in each set of streams.
Embodiments of the present invention also provide a kind of wireless signal transmission system, comprise K subsystem, and each subsystem is a wireless signal transmission system mentioned above, and different subsystems uses different running time-frequency resources, and K is the integer more than or equal to 2.
Embodiment of the present invention compared with prior art, the main distinction and effect thereof are:
By using different interleavers, make multiplex data stream can share identical running time-frequency resource, receiving terminal can recover each circuit-switched data stream according to different interleaving modes from identical running time-frequency resource, thereby has improved the availability of frequency spectrum of system.
Description of drawings
Fig. 1 is the wireless signal transmitting method flow chart according to first embodiment of the invention;
Fig. 2 is according to the coding schematic diagram in the first embodiment of the invention;
Fig. 3 is the difference schematic diagram according to distributed mapping in the first embodiment of the invention and centralized mapping;
Fig. 4 is the signal transmitting method schematic diagram according to a plurality of travelling carriages of first embodiment of the invention;
Fig. 5 is the signal transmitting method specific implementation schematic diagram according to a plurality of travelling carriages of first embodiment of the invention;
Fig. 6 is the cascade schematic diagram according to two interleavers in the wireless signal transmitting method of third embodiment of the invention;
Fig. 7 is the wireless signal transmitting method flow chart according to four embodiment of the invention;
Fig. 8 is the wireless signal transmitting method schematic diagram according to the travelling carriage of the many groups in the four embodiment of the invention;
Fig. 9 is the wireless signal transmitting method flow chart according to fifth embodiment of the invention;
Figure 10 is the schematic diagram according to the employing distributed mapping mode in the fifth embodiment of the invention;
Figure 11 is the wireless signal transmitting method schematic diagram according to a plurality of travelling carriages of fifth embodiment of the invention;
Figure 12 is the wireless signal transmitting method flow chart according to sixth embodiment of the invention;
Figure 13 is the wireless signal transmission system configuration schematic diagram according to seventh embodiment of the invention;
Figure 14 is in the wireless signal transmitting method according to first embodiment of the invention, increases the realization schematic diagram of power control;
Figure 15 is the signal transmitting method specific implementation schematic diagram according to a plurality of travelling carriages of second embodiment of the invention;
Figure 16 is a kind of other implementation example schematic according to wireless signal transmitting method of the present invention;
Figure 17 is other implementation example schematic of another kind according to wireless signal transmitting method of the present invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, embodiments of the present invention are described in further detail below in conjunction with accompanying drawing.
First execution mode of the present invention relates to a kind of wireless signal transmitting method, in the present embodiment, each circuit-switched data stream is the different layers data flow of same travelling carriage, that is to say, by a travelling carriage is launched different layers on identical running time-frequency resource data flow, idiographic flow as shown in Figure 1.
In step 110, travelling carriage does not carry out the coding of redundancy to each circuit-switched data flow point.Specifically, this travelling carriage does not carry out error correction coding to each circuit-switched data flow point earlier, reducing the rate of information throughput, by increasing the accuracy that redundancy improves message transmission, thereby has improved the probability that is correctly solved at receiving terminal.This error correcting code can be convolution code, Turbo code, LDPC sign indicating number or other error correcting code.Then, this travelling carriage carries out spread spectrum coding and/or repeated encoding to the data flow of each road after error correction coding, as shown in Figure 2.Because duplication code is by certain rule information to be carried out repetition, therefore can obtain temporal diversity.The effect of duplication code is equivalent to spread spectrum, so can replace with spreading code.Each circuit-switched data is flowed employed spreading code can be identical, also can be different.By spread spectrum coding and/or repeated encoding, an effective information position is expanded to a plurality of effective informations position, the redundancy of coding is higher, on the one hand can improve the probability that is correctly solved at receiving terminal, bigger on the other hand redundancy makes system still have the lower error rate when the multiplexing identical running time-frequency resource of multiplex data stream.
Need to prove, in actual applications, also can only use duplication code (or spreading code), a kind of also passable with in the error correcting code.Also can adopt different coded systems to different data flow.
Then, enter step 120, this travelling carriage uses different interleavers to interweave respectively to the coding result on each road.Specifically, this travelling carriage is the interleaver of each circuit-switched data flow distribution different interleaving rule, utilizes the interleaver of these different interleaving rules to distinguish different data flow.Data flow after each road is encoded interweaves by corresponding interleaver respectively, and then, this travelling carriage is superposed to one road signal with each the circuit-switched data stream after interweaving.
Then, enter step 130, the road signal map that this travelling carriage will superpose is carried out OFDM modulation back emission again on the time-frequency resource.Specifically, because OFDM modulation front end comprises contrary fast fourier transform (the Inverse Fast Fourier Transform that a N is ordered, be called for short " IFFT ") module, therefore the carrier wave mapping is exactly from the IFFT subcarrier that N is ordered, choose the position of mapping point, promptly from N IFFT subcarrier, choose M required subcarrier (N is not less than M).At present, realize that the mode of carrier wave mapping has distributed mapping and centralized mapping, for centralized mapping, distributed mapping has better frequency diversity effect.The difference of distributed mapping and centralized mapping (a) is the centralized mapping schematic diagram as shown in Figure 3, (b) is the distributed mapping schematic diagram.
Because in the present embodiment, by using different interleavers, make multiplex data stream can share identical running time-frequency resource, receiving terminal can recover each circuit-switched data stream according to different interleaving modes from identical running time-frequency resource, thereby has improved the availability of frequency spectrum of system.
Though be that signal transmitting method with a travelling carriage is that example describes in the present embodiment, but in actual applications, k travelling carriage can be arranged, each travelling carriage all adopts the signal transmitting method in the present embodiment identical, as shown in Figure 4, the signal of different mobile stations is distinguished by being mapped on the different running time-frequency resources.Since each travelling carriage be with self signal map to the running time-frequency resource different with other travelling carriage, therefore, one group of interleaver of each travelling carriage self can be identical with one group of interleaver of other travelling carriage, also can be different with one group of interleaver of other travelling carriage.
Fig. 5 is the signal transmitting method specific implementation schematic diagram of a plurality of travelling carriages, and wherein, phase-shift keying (Phase Shift Keying, be called for short " PSK ") is a kind of modulation system, can be placed on interleaver before, also can be placed on interleaver after.N the interleaver that travelling carriage 1 is adopted can be identical with n interleaver among the travelling carriage k, also can be different.For certain travelling carriage, as k travelling carriage, primary signal dk obtains n layer parallel data dk by string and conversion, n, obtain data flow bk behind the encoded module coding, n obtains data flow xk by interleaver, n, then will by interweave, data flow after the PSK modulation is superposed to sk, and sk is mapped on the running time-frequency resource, carries out OFDM modulation back emission again.Each travelling carriage goes the data map of each travelling carriage by different carrier wave mapping modes to different running time-frequency resources, send by the OFDM modulation then.
What deserves to be mentioned is, before the data flow after the PSK modulation is superposed to sk, can also carry out power control, will be superposed to sk through each the circuit-switched data stream after the power control again, as shown in figure 14 each the circuit-switched data stream after the PSK modulation.By each circuit-switched data stream being carried out power control, can make the interference of each circuit-switched data stream that more obvious strong and weak the differentiation can be arranged, can recover each circuit-switched data stream more easily thereby be convenient to receiving terminal.
Second execution mode of the present invention relates to a kind of wireless signal transmitting method, the present embodiment and first execution mode are roughly the same, its difference is, in the first embodiment, for certain travelling carriage, as k travelling carriage, original serial data is by after string and the conversion, obtain n layer parallel data dk, n, and then each layer parallel data carried out error correction coding (as shown in Figure 5); And in the present embodiment, earlier serial data is carried out error correction coding, will be converted to n layer parallel data then through the serial data of error correction coding, as shown in figure 15.
Owing to still can make multiplex data stream can share identical running time-frequency resource in the present embodiment, therefore have the beneficial effect identical with first execution mode by using different interleavers.
Be not difficult to find, the essence of first, second execution mode is, at least two paths of data flow point is not carried out the coding of redundancy, coding result to each road uses different interleavers to interweave respectively, each road result that interweaves is modulated on the identical running time-frequency resource in the OFDM mode and launches, to reach the purpose that improves the system spectrum utilance.Therefore, in actual applications, also can there be other to be different from the specific implementation method of first, second execution mode.
Such as, before string and conversion, earlier the data of travelling carriage are carried out error correction coding, after serial data is converted to parallel data, can directly interweave (as shown in figure 16), also can after serial data is converted to parallel data, the parallel data after the conversion be encoded, and then interweave, to the coding that the parallel data after the conversion is carried out, can be that error correcting code also can be other coding, or the combination of error correcting code and other coding (as shown in figure 17).
The 3rd execution mode of the present invention relates to a kind of wireless signal transmitting method, and present embodiment is further improved the interleaving treatment of each circuit-switched data stream on the basis of first execution mode.
Specifically, in the present embodiment, the interleaver that is respectively the Different Rule of each circuit-switched data flow distribution is formed by two interleaver cascades shorter than this interleaver.Such as, be N by the code word size after the error correction coding, spreading factor (perhaps, the inverse of duplication code number of times, repetition code check) is G, so, the treated length of interleaver is N * G.Directly adopting treated length in the first embodiment is the interleaver of N * G, and treated length is that the interleaver of N * G can generate by adopting random interleaver.And in the present embodiment, the random interleaver that to adopt G treated length be N carries out cascade, and to form treated length be the interleaver of G * N.
As shown in Figure 6, suppose that the code word size after error correction coding is 5, and the data flow after spreading factor (number of repetition) is 2 is 1234512345, then in the present embodiment, to each be 12345 data block to distribute the treated length of a correspondence be 5 interleaver, the data in the data block are interweaved.
By the interleaver that is L to a treated length, the interleaver that to adopt n treated length be L/n carries out cascade and forms, and the hardware of can being more convenient for is realized, and processing delay is shorter.
The 4th execution mode of the present invention relates to a kind of wireless signal transmitting method, the present embodiment and first execution mode are roughly the same, its difference is, in the first embodiment, each circuit-switched data stream is the different layers data flow of same travelling carriage, therefore, this travelling carriage can be launched each circuit-switched data stream by each circuit-switched data stream encoded, after interweaving is superposed to one road signal on identical running time-frequency resource.And in the present embodiment, each circuit-switched data stream is the data flow of different mobile stations, as shown in Figure 7.The interleaver of each travelling carriage is the interleaver of different interleaving rule, this interleaver group is used to distinguish the data flow of different mobile stations, each travelling carriage is modulated on the identical running time-frequency resource in the OFDM mode by the data flow after interweaving with this travelling carriage, and each circuit-switched data stream is launched on identical running time-frequency resource.Make receiving terminal from identical running time-frequency resource, to recover each circuit-switched data stream, thereby improved the availability of frequency spectrum of system according to different interleaving modes.
Need to prove that each travelling carriage as shown in Figure 7 can be considered one group of travelling carriage, in actual applications, can comprise the such travelling carriage of many groups, as shown in Figure 8.
For each group, distinguish each travelling carriage by the interleaver of the Different Rule in this group; Between organizing and organizing, distinguish the travelling carriage of each group by being mapped to different running time-frequency resources, therefore interior on the same group interleaver can be identical, also can difference.
The 5th execution mode of the present invention relates to a kind of wireless signal transmitting method, the present embodiment and first execution mode are roughly the same, its difference is, in the first embodiment, after will each the circuit-switched data stream after interweaving being superposed to one road signal, map directly on the running time-frequency resource, and in the present embodiment, after will each the circuit-switched data stream after interweaving being superposed to one road signal, carry out discrete Fourier transform (DFT) (DiscreteFourier Transformation earlier, be called for short " DFT "), be mapped on the running time-frequency resource again.Each circuit-switched data stream in the present embodiment is the different layers data flow of same travelling carriage equally.
Specifically, as shown in Figure 9, in step 910, this travelling carriage does not carry out the coding of redundancy to each circuit-switched data flow point.This step is identical with step 110, does not repeat them here.
Then, enter step 920, this travelling carriage uses different interleavers to interweave respectively to the coding result on each road.This step is identical with step 120, does not repeat them here.
Then, in step 930, road signal after this travelling carriage will superpose carries out the DFT conversion.In actual applications, DFT adopts fast fourier transform (Fast Fourier Transform is called for short " FFT ") to realize usually.
Then, enter step 940, this travelling carriage will carry out OFDM modulation back emission again through this road signal map of DFT conversion on the time-frequency resource.Can adopt the mode of distributed mapping and centralized mapping will be through this road signal map of DFT conversion on the time-frequency resource, the mode that adopts distributed mapping as shown in figure 10.
Similar with first execution mode, though be that signal transmitting method with a travelling carriage is that example describes in the present embodiment, but in actual applications, the travelling carriage that relates in k the present embodiment can be arranged, each travelling carriage all adopts the signal transmitting method in the present embodiment identical, as shown in figure 11, the signal of different mobile stations is distinguished by being mapped on the different running time-frequency resources.Since each travelling carriage be with self signal map to the running time-frequency resource different with other travelling carriage, therefore, one group of interleaver of each travelling carriage self can be identical with one group of interleaver of other travelling carriage, also can be different with one group of interleaver of other travelling carriage.
Because in the present embodiment, carry out the OFDM modulation after the DFT of the elder generation conversion, and comprise inverse discrete Fourier transformer inverse-discrete (Inverse Discrete Fourier Transformation in the OFDM modulation, be called for short " IDFT ") conversion (the IDFT conversion adopts the IFFT conversion to realize usually), be equivalent to time domain form data streams, so the power peak-to-average force ratio of emission synchronizing sequence (Peak Average Power Ratio is called for short " PAPR ") is minimized, transmission performance is improved.
The 6th execution mode of the present invention relates to a kind of wireless signal transmitting method, present embodiment and the 5th execution mode are roughly the same, its difference is, in the 5th execution mode, each circuit-switched data stream is the different layers data flow of same travelling carriage, and therefore, this travelling carriage can be by being superposed to one road signal with each circuit-switched data stream encoded, after interweaving, and, each circuit-switched data stream is launched on identical running time-frequency resource after the DFT conversion.And in the present embodiment, each circuit-switched data stream is the data flow of different mobile stations, as shown in figure 12.The interleaver of each travelling carriage is the interleaver of different interleaving rule, this interleaver group is used to distinguish the data flow of different mobile stations, each travelling carriage is by the data flow after interweaving with this travelling carriage, through being modulated on the identical running time-frequency resource in the OFDM mode after the DFT conversion, each circuit-switched data stream is launched on identical running time-frequency resource.Make receiving terminal from identical running time-frequency resource, to recover each circuit-switched data stream, thereby improved the availability of frequency spectrum of system according to different interleaving modes.
Need to prove that each travelling carriage as shown in figure 12 can be considered one group of travelling carriage, in actual applications, can comprise the such travelling carriage of many groups, for each group, distinguish each travelling carriage by the interleaver of the Different Rule in this group; Between organizing and organizing, distinguish the travelling carriage of each group by being mapped to different running time-frequency resources, therefore interior on the same group interleaver can be identical, also can difference.
The 7th execution mode of the present invention relates to a kind of wireless signal transmission system, as shown in figure 13, comprises: N coding unit is respectively applied for N circuit-switched data stream carried out the redundancy coding; N different interleaver, the coding result that is respectively applied for each coding unit output interweaves; Transmitter unit is used for the result that interweaves with the output of each interleaver and is modulated on the identical running time-frequency resource in the OFDM mode and launches.Wherein, N is the integer greater than 1.By using different interleavers, make multiplex data stream can share identical running time-frequency resource, receiving terminal can recover each circuit-switched data stream according to different interleaving modes from identical running time-frequency resource, thereby has improved the availability of frequency spectrum of system.
Specifically, comprise subelement that carries out spread spectrum coding and/or the subelement that carries out repeated encoding in the coding unit.By the subelement of spread spectrum coding and/or the subelement of repeated encoding, an effective information position can be expanded to a plurality of effective informations position, make that the redundancy of coding is higher, on the one hand can improve the probability that is correctly solved at receiving terminal, bigger on the other hand redundancy makes system still have the lower error rate when the multiplexing identical running time-frequency resource of multiplex data stream.
And, also can comprise the subelement that carries out error correction coding in the coding unit, be used for data are carried out the subelement that outputs to the subelement of spread spectrum coding after the error correction coding and/or carry out repeated encoding.Reducing the rate of information throughput, by increasing the accuracy that redundancy improves message transmission, thereby improved the probability that is correctly solved at receiving terminal.
Interleaver can be formed by at least two interleaver cascades shorter than this interleaver.Make easier realization on hardware, and processing delay is shorter.
For the situation of different layers data flow that N circuit-switched data stream is same travelling carriage, transmitter unit comprises: adder is used for the result that interweaves of each interleaver output is superposed to one road signal; The mapping subelement, the signal map that is used for adder is exported is to the time-frequency resource; And modulation subunit, be used for the output result of mapping subelement is carried out OFDM modulation back emission.This transmitter unit can also comprise the DFT subelement, is used for the signal of adder output is carried out outputing to the mapping subelement after the DFT conversion, to reduce the PAPR of emission synchronizing sequence.
For the situation of data flow that N circuit-switched data stream is N different mobile stations, transmitter unit has N, comprises a coding unit in each travelling carriage, an interleaver and a transmitter unit.Transmitter unit comprises: mapping subelement and modulation subunit.The mapping subelement is used for signal map with interleaver output to the time-frequency resource, wherein, the mapping subelement in N travelling carriage all with signal map to identical running time-frequency resource; Modulation subunit is used for the output result of mapping subelement is carried out OFDM modulation back emission.This transmitter unit can also comprise the DFT subelement, is used for the result that interweaves from interleaver is carried out outputing to the mapping subelement after the DFT conversion, to reduce the PAPR of emission synchronizing sequence.
The 8th execution mode of the present invention relates to a kind of wireless signal transmission system, this system comprises the individual subsystem of K (K is the integer more than or equal to 2), each subsystem is the wireless signal transmission system of the 7th execution mode, and different subsystems uses different running time-frequency resources.By with the combining of interlace-multiplex (InterleaveDivision Multiplexing, be called for short " IDM ") and OFDMA, native system is compared with the IFDMA system with the OFDMA system all the higher availability of frequency spectrum.
The 9th execution mode of the present invention relates to a kind of travelling carriage, comprises: coding unit is used for data stream is carried out the redundancy coding; Interleaver is used for the coding result of coding unit output is interweaved; Transmitter unit is used for the result that interweaves with interleaver output and is modulated on the running time-frequency resource of sharing with other travelling carriage in the OFDM mode and launches.
Specifically, comprise subelement that carries out spread spectrum coding and/or the subelement that carries out repeated encoding in the coding unit.By the subelement of spread spectrum coding and/or the subelement of repeated encoding, an effective information position can be expanded to a plurality of effective informations position, make that the redundancy of coding is higher, on the one hand can improve the probability that is correctly solved at receiving terminal, bigger on the other hand redundancy makes system still have the lower error rate when the multiplexing identical running time-frequency resource of multiplex data stream.And, also can comprise the subelement that carries out error correction coding in the coding unit, be used for data are carried out the subelement that outputs to the subelement of spread spectrum coding after the error correction coding and/or carry out repeated encoding.Reducing the rate of information throughput, by increasing the accuracy that redundancy improves message transmission, thereby improved the probability that is correctly solved at receiving terminal.Interleaver can be formed by at least two interleaver cascades shorter than this interleaver.Make easier realization on hardware, and processing delay is shorter.
This transmitter unit comprises: mapping subelement and modulation subunit.The signal map that the mapping subelement is used for interleaver is exported is to the running time-frequency resource shared with other travelling carriage; Modulation subunit is used for the output result of mapping subelement is carried out OFDM modulation back emission.This transmitter unit can also comprise the DFT subelement, is used for the result that interweaves from interleaver is carried out outputing to the mapping subelement after the DFT conversion, to reduce the PAPR of emission synchronizing sequence.
In sum, in embodiments of the present invention, by using different interleavers, make multiplex data stream can share identical running time-frequency resource, receiving terminal can recover each circuit-switched data stream according to different interleaving modes from identical running time-frequency resource, thereby has improved the availability of frequency spectrum of system.
Data flow is divided into a plurality of groups, distinguishes different data streams on the identical running time-frequency resource with different interleaving modes in each group, different groups is used different running time-frequency resources.By with the combining of IDM and OFDMA, comparing with the IFDMA system with the OFDMA system all has the higher availability of frequency spectrum.
By spread spectrum coding and/or repeated encoding, an effective information position is expanded to a plurality of effective informations position, the redundancy of coding is higher, on the one hand can improve the probability that is correctly solved at receiving terminal, bigger on the other hand redundancy makes system still have the lower error rate when the multiplexing identical running time-frequency resource of multiplex data stream.
By data flow is carried out error correction coding earlier, can improve the probability that is correctly solved at receiving terminal.
Carry out the OFDM modulation after the DFT of the elder generation conversion, and comprise the IDFT conversion in the OFDM modulation, be equivalent to time domain form data streams, so the peak-to-average force ratio of emission synchronizing sequence is minimized, transmission performance is improved.
Be cascaded into long interleaver by a plurality of short interleavers, the hardware of being more convenient for is realized, and processing delay is shorter.
Though pass through with reference to some of the preferred embodiment of the invention, the present invention is illustrated and describes, but those of ordinary skill in the art should be understood that and can do various changes to it in the form and details, and without departing from the spirit and scope of the present invention.
Claims (24)
1. a wireless signal transmitting method is characterized in that, comprises following steps:
At least two paths of data flow point is not carried out the coding of redundancy, use different interleavers to interweave respectively to the coding result on each road, the Jiang Gelu result that interweaves is modulated on the identical running time-frequency resource in the orthogonal frequency division multiplex OFDM mode and launches.
2. wireless signal transmitting method according to claim 1 is characterized in that the step of described coding comprises the substep that carries out spread spectrum coding and/or repeated encoding.
3. wireless signal transmitting method according to claim 2 is characterized in that, in the step of described coding, before the described substep that carries out spread spectrum coding and/or repeated encoding, also comprises the substep that carries out error correction coding.
4. wireless signal transmitting method according to claim 3, it is characterized in that, in the step of described coding, after the substep of described error correction coding, before the substep of described spread spectrum coding and/or repeated encoding, also comprise the substep that serial data is converted to parallel data;
Perhaps, before the step of described coding, comprise the step that serial data is converted to parallel data.
5. wireless signal transmitting method according to claim 1 is characterized in that the step of described coding comprises the substep that carries out error correction coding.
6. wireless signal transmitting method according to claim 5 is characterized in that, after the step of described coding, before the described step that interweaves, also comprises the step that serial data is converted to parallel data; Perhaps,
After the step of described coding, before the described step that interweaves, also comprise serial data is converted to parallel data, and the step that the parallel data after the conversion is encoded.
7. wireless signal transmitting method according to claim 1 is characterized in that, described each road result that interweaves is modulated on the identical running time-frequency resource emission in the orthogonal frequency division multiplex OFDM mode and comprises following:
The described result of interweaving is carried out discrete Fourier transform (DFT) DFT, and the result that will interweave through each road after the DFT conversion is modulated on the identical running time-frequency resource in the orthogonal frequency division multiplex OFDM mode and launches.
8. wireless signal transmitting method according to claim 1 is characterized in that, described interleaver is formed by at least two interleaver cascades shorter than this interleaver.
9. according to each described wireless signal transmitting method in the claim 1 to 8, it is characterized in that described each circuit-switched data stream is the different layers data flow of same travelling carriage;
Described each road result that interweaves be modulated at the step of launching on the identical running time-frequency resource in the OFDM mode and comprise following substep:
Described each road result that interweaves is superposed to one road signal, this road signal map on the time-frequency resource, is carried out OFDM modulation back emission again.
10. according to each described wireless signal transmitting method in the claim 1 to 8, it is characterized in that described each circuit-switched data stream is the data flow of different mobile stations;
Described each road result that interweaves be modulated at the step of launching on the identical running time-frequency resource in the OFDM mode and comprise following substep:
Described each road result that interweaves is mapped to respectively on the identical running time-frequency resource, carries out OFDM modulation back emission.
11. a wireless signal transmission system is characterized in that, comprises:
N coding unit is respectively applied for N circuit-switched data stream carried out the redundancy coding;
N different interleaver, the coding result that is respectively applied for each described coding unit output interweaves;
Transmitter unit is used for the result that interweaves with each described interleaver output and is modulated on the identical running time-frequency resource in the OFDM mode and launches;
Wherein, N is the integer greater than 1.
12. wireless signal transmission according to claim 11 system is characterized in that, comprises subelement that carries out spread spectrum coding and/or the subelement that carries out repeated encoding in the described coding unit;
Also comprise the subelement that carries out error correction coding in the described coding unit, be used for described data are carried out the subelement that outputs to the subelement of described spread spectrum coding after the error correction coding and/or carry out repeated encoding.
13. wireless signal transmission according to claim 11 system is characterized in that, described interleaver is formed by at least two interleaver cascades shorter than this interleaver.
14., it is characterized in that described N circuit-switched data stream is the different layers data flow of same travelling carriage according to each described wireless signal transmission system in the claim 11 to 13;
Described transmitter unit comprises:
Adder is used for the result that interweaves of each described interleaver output is superposed to one road signal;
The mapping subelement, the signal map that is used for described adder is exported is to the time-frequency resource;
Modulation subunit is used for the output result of described mapping subelement is carried out OFDM modulation back emission.
15. wireless signal transmission according to claim 14 system is characterized in that described transmitter unit also comprises the DFT subelement, is used for the signal of described adder output is carried out outputing to described mapping subelement after the DFT conversion.
16., it is characterized in that described N circuit-switched data stream is the data flow of N different mobile stations according to each described wireless signal transmission system in the claim 11 to 13;
Described transmitter unit has N, comprises a described coding unit in each travelling carriage, a described interleaver and a described transmitter unit;
Described transmitter unit comprises:
The mapping subelement is used for signal map with the output of described interleaver to the time-frequency resource, wherein, the mapping subelement in N described travelling carriage all with signal map to identical running time-frequency resource;
Modulation subunit is used for the output result of described mapping subelement is carried out OFDM modulation back emission.
17. wireless signal transmission according to claim 16 system is characterized in that, also comprises the DFT unit in each described travelling carriage, is used for the result that interweaves from described interleaver is carried out outputing to described mapping subelement after the DFT conversion.
18. a travelling carriage is characterized in that, comprises:
Coding unit is used for data stream is carried out the redundancy coding;
Interleaver is used for the coding result of described coding unit output is interweaved;
Transmitter unit is used for the result that interweaves with the output of described interleaver and is modulated on the running time-frequency resource of sharing with other travelling carriage in the OFDM mode and launches.
19. travelling carriage according to claim 18 is characterized in that, comprises subelement that carries out spread spectrum coding and/or the subelement that carries out repeated encoding in the described coding unit;
Also comprise the subelement that carries out error correction coding in the described coding unit, be used for described data are carried out the subelement that outputs to the subelement of described spread spectrum coding after the error correction coding and/or carry out repeated encoding.
20., it is characterized in that described transmitter unit comprises according to claim 18 or 19 described travelling carriages:
The mapping subelement, the signal map that is used for described interleaver is exported is to the running time-frequency resource shared with other travelling carriage;
Modulation subunit is used for the output result of described mapping subelement is carried out OFDM modulation back emission.
21. travelling carriage according to claim 20 is characterized in that, also comprises the DFT unit, is used for the result that interweaves from described interleaver is carried out outputing to described mapping subelement after the DFT conversion.
22. wireless signal transmitting method, it is characterized in that, use in the claim 1 to 8 each described method to launch respectively to each group in K the set of streams, wherein, different set of streams is used different running time-frequency resources, K is the integer more than or equal to 2, comprises two paths of data stream at least in each set of streams.
23. wireless signal transmitting method according to claim 20 is characterized in that, different set of streams belongs to different travelling carriages, and each data flow in the same set of streams belongs to same travelling carriage; Perhaps,
Different data streams in the different data streams group belongs to different travelling carriages respectively.
24. a wireless signal transmission system is characterized in that, comprises K subsystem, each subsystem is each described wireless signal transmission system in the claim 11 to 13, and different subsystems uses different running time-frequency resources, and K is the integer more than or equal to 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101486996A CN101291313B (en) | 2007-04-19 | 2007-09-04 | Wireless signal transmitting method, system and mobile station |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710101462.2 | 2007-04-19 | ||
| CN200710101462 | 2007-04-19 | ||
| CN2007101486996A CN101291313B (en) | 2007-04-19 | 2007-09-04 | Wireless signal transmitting method, system and mobile station |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101291313A true CN101291313A (en) | 2008-10-22 |
| CN101291313B CN101291313B (en) | 2012-01-11 |
Family
ID=40035393
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007101486996A Active CN101291313B (en) | 2007-04-19 | 2007-09-04 | Wireless signal transmitting method, system and mobile station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101291313B (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102684840A (en) * | 2012-05-29 | 2012-09-19 | 上海交通大学 | Novel coding modulation method and device for low-density parity check code |
| CN103548294A (en) * | 2011-05-13 | 2014-01-29 | 高通股份有限公司 | Systems and methods for wireless communication of packets having a plurality of formats |
| WO2014110812A1 (en) * | 2013-01-18 | 2014-07-24 | 华为技术有限公司 | Information transmission method and device |
| CN103973395A (en) * | 2013-01-28 | 2014-08-06 | 华为技术有限公司 | Data processing method, device and system in wireless communication |
| CN104811410A (en) * | 2014-01-26 | 2015-07-29 | 上海数字电视国家工程研究中心有限公司 | Construction method, transmitting method and demodulation method of physical frames |
| CN105262559A (en) * | 2014-07-15 | 2016-01-20 | 中国移动通信集团公司 | Data sending method, data receiving method and related device |
| US9843654B2 (en) | 2011-05-13 | 2017-12-12 | Qualcomm Incorporated | Systems and methods for wireless communication of packets having a plurality of formats |
| CN108306707A (en) * | 2017-01-12 | 2018-07-20 | 中兴通讯股份有限公司 | A kind of method, apparatus and communication system of multiple access access |
| CN108432168A (en) * | 2016-06-14 | 2018-08-21 | 华为技术有限公司 | A kind of method and apparatus demodulated and decode |
| CN113556206A (en) * | 2020-04-22 | 2021-10-26 | 广州海格通信集团股份有限公司 | Anti-jamming communication system, method, computer device, and storage medium |
| CN114598419A (en) * | 2021-11-12 | 2022-06-07 | 北京智芯微电子科技有限公司 | Interleaver, deinterleaver, and methods of performing the same |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100539862B1 (en) * | 2001-04-04 | 2005-12-28 | 삼성전자주식회사 | Method and apparatus for transporting and receiving data in cdma mobile system |
| EP1513260B1 (en) * | 2001-10-10 | 2007-09-26 | Matsushita Electric Industrial Co., Ltd. | Interference decorrelation of multiple stream interpolated data |
| CN100359831C (en) * | 2001-12-28 | 2008-01-02 | 中兴通讯股份有限公司 | Bit uniformly-inserted parallel cascaded code interleaving method and its interleaving device |
-
2007
- 2007-09-04 CN CN2007101486996A patent/CN101291313B/en active Active
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103548294A (en) * | 2011-05-13 | 2014-01-29 | 高通股份有限公司 | Systems and methods for wireless communication of packets having a plurality of formats |
| US9843654B2 (en) | 2011-05-13 | 2017-12-12 | Qualcomm Incorporated | Systems and methods for wireless communication of packets having a plurality of formats |
| CN102684840A (en) * | 2012-05-29 | 2012-09-19 | 上海交通大学 | Novel coding modulation method and device for low-density parity check code |
| CN102684840B (en) * | 2012-05-29 | 2014-12-24 | 上海交通大学 | Novel coding modulation method and device for low-density parity check code |
| CN104137638A (en) * | 2013-01-18 | 2014-11-05 | 华为技术有限公司 | Information transmission method and device |
| WO2014110812A1 (en) * | 2013-01-18 | 2014-07-24 | 华为技术有限公司 | Information transmission method and device |
| CN103973395A (en) * | 2013-01-28 | 2014-08-06 | 华为技术有限公司 | Data processing method, device and system in wireless communication |
| CN104811410A (en) * | 2014-01-26 | 2015-07-29 | 上海数字电视国家工程研究中心有限公司 | Construction method, transmitting method and demodulation method of physical frames |
| CN104811410B (en) * | 2014-01-26 | 2018-05-04 | 上海数字电视国家工程研究中心有限公司 | Construction method, sending method and the demodulation method of physical frame |
| CN105262559A (en) * | 2014-07-15 | 2016-01-20 | 中国移动通信集团公司 | Data sending method, data receiving method and related device |
| CN108432168A (en) * | 2016-06-14 | 2018-08-21 | 华为技术有限公司 | A kind of method and apparatus demodulated and decode |
| CN108432168B (en) * | 2016-06-14 | 2020-11-03 | 华为技术有限公司 | Method and equipment for demodulation and decoding |
| CN108306707A (en) * | 2017-01-12 | 2018-07-20 | 中兴通讯股份有限公司 | A kind of method, apparatus and communication system of multiple access access |
| CN108306707B (en) * | 2017-01-12 | 2024-02-20 | 中兴通讯股份有限公司 | Method, device and communication system for multiple access |
| CN113556206A (en) * | 2020-04-22 | 2021-10-26 | 广州海格通信集团股份有限公司 | Anti-jamming communication system, method, computer device, and storage medium |
| CN113556206B (en) * | 2020-04-22 | 2023-10-10 | 广州海格通信集团股份有限公司 | Anti-interference communication system, method, computer device and storage medium |
| CN114598419A (en) * | 2021-11-12 | 2022-06-07 | 北京智芯微电子科技有限公司 | Interleaver, deinterleaver, and methods of performing the same |
| CN114598419B (en) * | 2021-11-12 | 2023-08-01 | 北京智芯微电子科技有限公司 | Interleaver, deinterleaver, and methods of performing the same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101291313B (en) | 2012-01-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101291313B (en) | Wireless signal transmitting method, system and mobile station | |
| CN107786482B (en) | Multi-terminal information receiving and sending method based on grid mapping and corresponding equipment | |
| CN102833818B (en) | Physical downlink control channel mapping method and transmitting-receiving apparatus | |
| CN107800662B (en) | Method for reducing peak-to-average power ratio of spread spectrum OFDM signal | |
| CN101222268B (en) | Frequency hopping transmitter, receiver device and frequency hopping method of continuous frequency division multiple address system | |
| CN104780033B (en) | A kind of self-adaptive method for allotting sub carriers for SIM ofdm systems | |
| US20070071125A1 (en) | Method and apparatus for ifdma transmission | |
| CN104811222A (en) | Design method of radar communication integrated signal | |
| WO2006060941A1 (en) | A pilot allocation method and device of orthogonal frequency division multiplexing system | |
| CN109274629B (en) | Peak power optimization method and emission system in ofdm system | |
| CN108737307A (en) | A kind of method, transmitter and the receiver of multiple access access | |
| CN108847917B (en) | Orthogonal frequency division multiplexing transmission method modulated by pilot frequency pattern | |
| CN103312405B (en) | A kind of time frequency coding diversity MT-CDMA systems radiate and method of reseptance | |
| CN106954202A (en) | WLAN information transferring method and device | |
| CN101471746B (en) | Wideband wireless transmission method, device and transmission system | |
| CN101340273B (en) | Multi-address access method, apparatus and system | |
| CN109412998B (en) | Position pattern design method in pilot frequency pattern modulation system | |
| CN101232486B (en) | Random sub carrier wave distributing method in multi-user OFDM system | |
| RU2480910C2 (en) | Method and device to sum up diverse repeating signals in ofdma systems | |
| CN102387105B (en) | Modulating method and device | |
| CN100586221C (en) | Reverse signal receiving/transmission method and equipment based on the OFDM access | |
| CN101286774B (en) | Interleaved multiplexing transmitter system, interleaved duplex transmitter and data processing method | |
| CN101064705A (en) | Carrier resource distribution system and method | |
| CN108449304B (en) | Partial transmission sequence method for reducing peak-to-average power ratio of OFDM (orthogonal frequency division multiplexing) signal | |
| CN108616475B (en) | Subcarrier index differential modulation method for OFDM system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |