CN108390841B - Anti-interference transmission method and device, computer equipment and storage medium - Google Patents
Anti-interference transmission method and device, computer equipment and storage medium Download PDFInfo
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- CN108390841B CN108390841B CN201810026848.XA CN201810026848A CN108390841B CN 108390841 B CN108390841 B CN 108390841B CN 201810026848 A CN201810026848 A CN 201810026848A CN 108390841 B CN108390841 B CN 108390841B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2626—Arrangements specific to the transmitter only
- H04L27/2627—Modulators
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2655—Synchronisation arrangements
- H04L27/2668—Details of algorithms
- H04L27/2681—Details of algorithms characterised by constraints
- H04L27/2688—Resistance to perturbation, e.g. noise, interference or fading
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
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Abstract
The invention relates to an anti-interference transmission method, an anti-interference transmission device, computer equipment and a storage medium, and belongs to the technical field of data transmission. The method comprises the following steps: determining interfered subcarriers in a transmission bandwidth; selecting a remapping subcarrier from the two sides of the transmission bandwidth according to the interfered subcarrier; combining to obtain an available subcarrier set according to the selected remapped subcarriers and the undisturbed subcarriers in the transmission bandwidth; and transmitting data through the available subcarrier set. By the technical scheme, the problem that an interference source in the OFDM system cannot be avoided in a targeted manner is solved, the influence of interference can be removed in a targeted manner, and the efficiency and the accuracy of interfered data transmission are improved.
Description
Technical Field
The present invention relates to the field of data transmission technologies, and in particular, to an anti-interference transmission method and apparatus, a computer device, and a storage medium.
Background
In an OFDM (Orthogonal Frequency Division Multiplexing) system, Frequency domain resources are usually divided into a plurality of subcarriers, and transmission information is modulated onto each subcarrier for transmission. However, the interference source may destroy the continuity of the available subcarriers, generate a large number of retransmissions and bit errors, and thus reduce the communication effect. In the process of implementing the invention, the inventor finds that at least the following problems exist in the prior art: in the current OFDM system, the methods for counteracting interference mainly include: coding redundancy is improved, modulation order is reduced, transmission power is increased, retransmission is performed and the like. However, these methods cannot specifically avoid an interference source in the OFDM system, and have negative effects such as power consumption waste, increased transmission delay, and reduced spectrum efficiency. Therefore, there is a need to find a method for achieving targeted interference resistance while ensuring the efficiency and accuracy of data transmission.
Disclosure of Invention
Based on the method, the device, the computer equipment and the storage medium, the anti-interference transmission method, the device, the computer equipment and the storage medium can remove the influence of interference in a targeted manner and improve the efficiency and the accuracy of data transmission of the interfered OFDM system.
The content of the embodiment of the invention is as follows:
an anti-interference transmission method, comprising the steps of: determining interfered subcarriers in a transmission bandwidth; selecting a remapping subcarrier from the two sides of the transmission bandwidth according to the interfered subcarrier; combining to obtain an available subcarrier set according to the selected remapped subcarriers and the undisturbed subcarriers in the transmission bandwidth; and transmitting data through the available subcarrier set.
In one embodiment, the step of selecting the remapped sub-carriers out-of-band from two sides of the transmission bandwidth according to the interfered sub-carriers includes: determining the number of the interfered subcarriers; and within the range of the number of FFT/IFFT operation points, selecting a corresponding number of subcarriers from the two sides of the transmission bandwidth according to the number to obtain remapped subcarriers.
In one embodiment, the step of transmitting data through the set of available subcarriers includes: and determining the number of each subcarrier in the available subcarrier set, and modulating the data to be transmitted to the subcarriers in the available subcarrier set according to the number for transmission.
In one embodiment, the determining the number of each subcarrier in the available subcarrier set, and modulating data to be transmitted onto the subcarriers in the available subcarrier set according to the number for transmission includes: respectively acquiring a first number of a remapped subcarrier and a second number of an undisturbed subcarrier to form the number of each subcarrier in the available subcarrier set; acquiring a third number of an interfered subcarrier, and determining a mapping relation between the first number and the third number; modulating data to be transmitted corresponding to the interfered subcarrier to the remapping subcarrier for transmission according to the mapping relation; and modulating the corresponding data to be transmitted to the undisturbed subcarrier for transmission according to the second number.
In one embodiment, the step of obtaining the first number of the remapped sub-carriers further includes: each remapped subcarrier is numbered according to the frequency.
In one embodiment, the step of obtaining the first number of the remapped sub-carriers further includes: and numbering each remapping subcarrier according to the frequency difference value of the in-band center frequency of each remapping subcarrier and the transmission bandwidth.
In one embodiment, the determining the number of each subcarrier in the available subcarrier set, and modulating data to be transmitted onto the subcarriers in the available subcarrier set according to the number for transmission includes: all subcarriers in the available subcarrier set are numbered again to obtain new numbers corresponding to the subcarriers; and modulating all data to be transmitted to the subcarriers in the available subcarrier set according to the new serial numbers for transmission.
In one embodiment, the step of transmitting data through the set of available subcarriers includes: acquiring subcarrier information used by a sender in a data transmission process; and sending the subcarrier use information of the sender to a corresponding receiver so that the receiver receives the data transmitted by the sender according to the subcarrier use information.
Correspondingly, an embodiment of the present invention provides an anti-interference transmission apparatus, including:
an interference subcarrier determining module, configured to determine an interfered subcarrier within a transmission bandwidth; a remapping subcarrier selecting module, configured to select a remapping subcarrier from both sides of the transmission bandwidth out-of-band according to the interfered subcarrier; combining to obtain an available subcarrier set according to the selected remapped subcarriers and the undisturbed subcarriers in the transmission bandwidth; and the data transmission module is used for carrying out data transmission through the available subcarrier set.
According to the anti-interference transmission method and device, in a transmission bandwidth, if some subcarriers are interfered, the interfered subcarriers cannot be used for transmitting data; firstly, determining which sub-carriers in a transmission bandwidth are interfered by an interference source; according to the information of the interfered subcarriers, remapping subcarriers are selected from the two sides of the transmission bandwidth; replacing the interfered subcarriers with the selected remapping subcarriers, and combining to obtain an available subcarrier set according to the selected remapping subcarriers and the subcarriers which are not interfered in the transmission bandwidth; and transmitting data through the available subcarrier set. Aiming at the interference existing in the OFDM system, the interfered subcarrier is prevented from being used for transmitting data, the remapping subcarrier which is reasonably selected is used for complementation, and the logical continuity of the subcarrier is kept, so that the effects of ensuring the transmission rate, reducing the time delay and reducing the power consumption are achieved.
A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the following steps when executing the computer program: determining interfered subcarriers in a transmission bandwidth; selecting a remapping subcarrier from the two sides of the transmission bandwidth according to the interfered subcarrier; combining to obtain an available subcarrier set according to the selected remapped subcarriers and the undisturbed subcarriers in the transmission bandwidth; and transmitting data through the available subcarrier set.
The computer equipment avoids using interfered sub-carriers to transmit data aiming at interference in an OFDM system, supplements the interference through the remapped sub-carriers which are reasonably selected, and keeps the continuity of the sub-carriers on logic, thereby achieving the effects of ensuring transmission rate, reducing time delay and reducing power consumption.
A computer-readable storage medium, on which a computer program is stored which, when executed by a processor, carries out the steps of: determining interfered subcarriers in a transmission bandwidth; selecting a remapping subcarrier from the two sides of the transmission bandwidth according to the interfered subcarrier; combining to obtain an available subcarrier set according to the selected remapped subcarriers and the undisturbed subcarriers in the transmission bandwidth; and transmitting data through the available subcarrier set.
The computer readable storage medium avoids using interfered sub-carriers to transmit data aiming at interference in an OFDM system, supplements the interference through the remap sub-carriers which are reasonably selected, and keeps the continuity of the sub-carriers on logic, thereby achieving the effects of ensuring transmission rate, reducing time delay and reducing power consumption.
Drawings
FIG. 1 is a diagram of an exemplary implementation of a method for interference rejection transmission;
FIG. 2 is a diagram of interfered subcarriers within a bandwidth of an OFDM system in one embodiment;
FIG. 3 is a flow diagram of a method for interference rejection transmission in one embodiment;
FIG. 4 is a diagram illustrating various sub-carriers within the bandwidth of an OFDM system in one embodiment;
fig. 5 is a diagram of remapped sub-carriers in one embodiment;
fig. 6 is a diagram of remapping subcarriers in another embodiment;
fig. 7 is a diagram illustrating a mapping relationship between interfered subcarriers and remapped subcarriers in an embodiment;
FIG. 8 is a flow diagram of a method for interference rejection transmission in another embodiment;
FIG. 9 is a diagram illustrating an exemplary implementation of the interference rejection transmission method in one embodiment;
FIG. 10 is a block diagram of an embodiment of an apparatus for interference rejection transmission;
FIG. 11 is a diagram illustrating an internal structure of a computer device in one embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Since the 21 st century, OFDM systems began to be commercially available in large scale, and wireless broadband communication has also been rapidly developed. A large number of communication standards based on the OFDM system have been established and implemented, and the OFDM debugging method still occupies an important position in the 5 th generation mobile communication system.
Furthermore, with the increasing demand for large bandwidth for modern data transmission, the bandwidth adopted by the OFDM system is increasing. Currently, a communication system using an OFDM modulation scheme generally uses a large bandwidth (for example, LTE, WiMAX, etc., and the used bandwidth is 20MHz, even 100 MHz). There are inevitably several narrowband interferers within these bandwidths. As shown in fig. 1, there are interfered subcarriers within the transmission bandwidth. And as the bandwidth increases, the number and probability of interfered subcarriers become larger and larger. Therefore, an anti-interference transmission method suitable for the OFDM system is necessary in the practical application process.
In the current general communication standards (such as 3GPP and IEEE), interference-free transmission of the OFDM system is not considered, and interference is generally countered by increasing coding redundancy, reducing modulation order, increasing transmission power, checking retransmission, increasing error correction coding redundancy, and the like. However, these methods cannot accurately and specifically avoid interference, and not only have very limited anti-interference effect, but also may cause negative effects such as power consumption waste, increased transmission delay, and reduced spectrum efficiency. For example, a method of improving coding redundancy may reduce the proportion of effective information in transmission data, thereby requiring more transmission resources and causing greater transmission delay; the method for reducing the modulation order can reduce the frequency spectrum efficiency, thereby wasting transmission resources and increasing transmission time delay; the method for improving the transmission power can cause the increase of power consumption, waste of transmission power, high requirements on devices, increase of equipment cost, bring greater same frequency interference during networking and reduce network throughput; the retransmission checking method occupies a large number of transmission opportunities, increases communication delay, and may cause problems of transmission failure, data discard, and the like. Therefore, the conventional techniques cannot effectively combat the interference in the OFDM system, and a new method is needed to ensure efficient and high-speed data transmission of the OFDM system in the interference environment.
The anti-interference transmission method provided by the embodiment of the invention can be applied to the application environment shown in fig. 2. Wherein the terminal 210 performs data transmission with the server 220 through a channel. Among them, the terminal 210 may be, but is not limited to, various personal computers, notebook computers, smart phones, tablet computers, and portable wearable devices; server 220 may be implemented as a stand-alone server or as a server cluster comprised of multiple servers. The anti-interference transmission method provided by the embodiment of the invention can also be applied to an application environment in which the server in fig. 2 is replaced by the terminal or other equipment, so that data transmission between terminals is realized. The method can also be applied to an application environment for data transmission among other devices or among a plurality of devices.
In one embodiment, as shown in fig. 3, there is provided a method for interference-free transmission, comprising the steps of:
s310, determining interfered subcarriers in the transmission bandwidth.
The interfered subcarrier refers to a subcarrier in which interference exists and data cannot be normally transmitted.
In this step, it is determined which subcarriers in the transmission bandwidth are interfered.
Optionally, a method for determining that the subcarrier is interfered may adopt a common interference sensing method, and the method for determining the subcarrier is not limited in the embodiment of the present invention.
S320, selecting a remapping subcarrier from the two sides of the transmission bandwidth according to the interfered subcarrier; and combining the selected remapped sub-carriers and the non-interfered sub-carriers in the transmission bandwidth to obtain an available sub-carrier set.
The remapped sub-carriers refer to sub-carriers selected from the two sides of the transmission bandwidth, and can be used to replace the interfered sub-carriers for data transmission.
In this step, a suitable sub-carrier is selected from the out-of-band at both sides of the transmission bandwidth as a remapped sub-carrier. The remapped sub-carriers are used to replace the interfered sub-carriers for data transmission. Therefore, the selected remapped sub-carriers and the non-interfered sub-carriers are determined as the usable sub-carriers (the sub-carriers not interfered by the interference source), and the usable sub-carrier set is obtained.
And S330, carrying out data transmission through the available subcarrier set.
In this step, the data to be transmitted is transmitted by the set of available subcarriers.
In this embodiment, first, which subcarriers within the transmission bandwidth are interfered are determined; according to the information of the interfered subcarriers, remapping subcarriers are selected from the two sides of the transmission bandwidth; replacing the interfered sub-carriers with the selected remapped sub-carriers to obtain an available sub-carrier set; and transmitting data through the available subcarrier set. Aiming at the interference existing in the OFDM system, the interfered subcarrier is prevented from being used for transmitting data, the remapping subcarrier which is reasonably selected is used for complementation, and the logical continuity of the subcarrier is kept, so that the effects of ensuring the transmission rate, reducing the time delay and reducing the power consumption are achieved.
In one embodiment, the step of selecting the remapped sub-carriers out-of-band from two sides of the transmission bandwidth according to the interfered sub-carriers includes: determining the number of the interfered subcarriers; and within the range of the number of FFT/IFFT operation points, selecting a corresponding number of subcarriers from the two sides of the transmission bandwidth according to the number to obtain remapped subcarriers.
Fig. 4 is a diagram illustrating various sub-carriers within the OFDM system bandwidth in one embodiment, and as shown in fig. 4, the OFDM system bandwidth includes in-band sub-carriers and out-of-band sub-carriers. If some of the in-band subcarriers are interfered, the in-band subcarriers may include interfered subcarriers and non-interfered subcarriers.
The intra-band subcarriers in this embodiment refer to subcarriers used as specified by each OFDM system standard. The number of FFT/IFFT operations used in the OFDM system is usually greater than the number of subcarriers actually used (for example, the 20MHz _ LTE system actually uses 1200 subcarriers, and performs FFT/IFFT operations using 2048 points), so that guard sidebands are left on both sides of the transmission bandwidth. The remapped sub-carrier is a sub-carrier selected from out-of-band sub-carriers (guard sidebands), and refers to a sub-carrier with frequencies coincident with FFT/IFFT operation, outside the upper band or the lower band of the system transmission frequency band.
Alternatively, the choice of remapping the subcarriers may be various. Fig. 5 is a diagram of remapped subcarriers in one embodiment. As shown in fig. 5, after the 5 interfered subcarriers are removed (the number of interfered subcarriers is determined according to actual conditions), the 5 subcarriers are sequentially selected from the low-frequency part of the bandwidth as the remapped subcarriers for data transmission. Fig. 6 is a schematic diagram of remapping subcarriers in another embodiment, and as shown in fig. 6, 5 subcarriers are sequentially selected as remapping subcarriers from the high frequency part of the bandwidth for data transmission. The selection of the remapped sub-carriers may be in other ways or a combination of ways than shown in fig. 5 and 6. Furthermore, the selected remapped subcarriers may or may not be contiguous.
In this embodiment, the number of interfered subcarriers is first determined to obtain the number of remapped subcarriers corresponding to the interfered subcarriers, and the subcarriers are selected from an appropriate position of the transmission bandwidth according to the number of remapped subcarriers. And the sub-carrier remapping mode is adopted, so that the use of interfered sub-carriers is avoided, the influence of an interference source on data is further avoided, and the accuracy of the data is ensured.
In one embodiment, the step of transmitting data over the set of available subcarriers comprises: and determining the number of each subcarrier in the available subcarrier set, and modulating the data to be transmitted to the subcarriers in the available subcarrier set according to the number for transmission.
Wherein, in order to realize modulation and demodulation, the in-band sub-carriers need to have a uniform label in the system. Alternatively, the number of each subcarrier may be predetermined; or after the remapped subcarriers are selected, numbering the subcarriers in the available subcarrier set again to obtain the remapped subcarriers. The numbering implementation may be performed by the system, the sender/receiver, etc.
Alternatively, all of the interfered subcarriers may be replaced with remapped subcarriers. After finding the interfered sub-carrier, the interfered degree of the interfered sub-carrier can be determined, the sub-carrier which is seriously interfered is replaced by the remapped sub-carrier, and for the sub-carrier which is not particularly serious, the method can also be used for transmitting data as long as the accuracy of the data is not affected.
In this embodiment, data to be transmitted is modulated onto corresponding subcarriers one by one according to the number of each subcarrier in the available subcarrier set for transmission. The data to be transmitted can be in one-to-one correspondence with the available subcarriers, so that the accuracy of the data received by a receiving party is ensured, and the data transmission efficiency is improved.
In one embodiment, the step of determining the number of each subcarrier in the available subcarrier set, and modulating data to be transmitted onto the subcarriers in the available subcarrier set according to the number for transmission includes: respectively acquiring a first number of a remapped subcarrier and a second number of an undisturbed subcarrier to form the number of each subcarrier in the available subcarrier set; acquiring a third number of an interfered subcarrier, and determining a mapping relation between the first number and the third number; modulating data to be transmitted corresponding to the interfered subcarrier to the remapping subcarrier for transmission according to the mapping relation; and modulating the corresponding data to be transmitted to the undisturbed subcarrier for transmission according to the second number.
The mapping relationship may be various, and as shown in fig. 7, the mapping relationship may be an order mapping, an inverse order mapping, a cyclic shift mapping, or other mapping. The embodiment of the invention does not limit the mapping relation and can ensure that the remapping sub-carriers and the interfered sub-carriers are mapped one by one.
In this embodiment, numbers of remapped subcarriers and non-interfered subcarriers are determined, and a correspondence between a first number of a remapped subcarrier and a second number corresponding to the non-interfered subcarrier is determined according to a specific situation, so as to correspond the remapped subcarrier and the non-interfered subcarrier. And replacing the interfered subcarriers with the remapped subcarriers, and modulating the data to be transmitted corresponding to the interfered subcarriers onto the remapped subcarriers for transmission. The method can ensure the accuracy of data transmission and avoid the influence of interference on the data.
In one embodiment, the step of obtaining the first number of the remapped sub-carriers further includes: each remapped subcarrier is numbered according to the frequency.
Optionally, the number of remapped sub-carriers is preset before data modulation. The numbering may be arranged according to the frequency, or may be performed in other manners.
Fig. 8 is a schematic flowchart of the anti-interference transmission method in this embodiment, and as shown in fig. 8, the anti-interference transmission method in this embodiment includes the following steps:
s810, determining interfered subcarriers in a transmission bandwidth;
s820, selecting a remapping subcarrier from the two sides of the transmission bandwidth according to the interfered subcarrier; combining to obtain an available subcarrier set according to the selected remapped subcarriers and the undisturbed subcarriers in the transmission bandwidth;
s830, numbering each remapping subcarrier according to the frequency;
s840, respectively obtaining a first number of the remapped subcarrier and a second number of the undisturbed subcarrier to form the number of each subcarrier in the usable subcarrier set;
s850, acquiring a third number of the interfered subcarrier, and determining the mapping relation between the first number and the third number; modulating data to be transmitted corresponding to the interfered subcarrier to the remapping subcarrier for transmission according to the mapping relation;
and S860, modulating the corresponding data to be transmitted to the undisturbed subcarrier for transmission according to the second number.
In this embodiment, the remapped subcarriers are numbered according to the frequency, and correspond to the interfered subcarriers, and replace the interfered subcarriers with the remapped subcarriers to perform data transmission, where the subcarriers without interference still transmit their corresponding data to be transmitted. The method can effectively ensure the accuracy of data transmission and the efficiency of a data modulation process, and avoid causing unnecessary time delay.
In one embodiment, the step of obtaining the first number of the remapped sub-carriers further includes: and numbering each remapping subcarrier according to the frequency difference value of the in-band center frequency of each remapping subcarrier and the transmission bandwidth.
The present embodiment achieves the numbering of the remapped sub-carriers in another way, i.e. in terms of frequency distance from the inband center. Alternatively, the subcarriers with the same distance are numbered according to the frequency.
The number of the remapped sub-carriers may be other frequency-dependent, frequency-independent, or even random number, besides the above two embodiments.
In one embodiment, the step of determining the number of each subcarrier in the available subcarrier set, and modulating data to be transmitted onto the subcarriers in the available subcarrier set according to the number for transmission includes: all subcarriers in the available subcarrier set are numbered again to obtain new numbers corresponding to the subcarriers; and modulating all data to be transmitted to the subcarriers in the available subcarrier set according to the new serial numbers for transmission.
In this embodiment, all subcarriers in the available subcarrier set are renumbered, and the data to be transmitted is modulated onto each subcarrier for transmission. The method can flexibly establish the relation between the data to be transmitted and each subcarrier according to the condition of the subcarriers, and further realize the modulation of the data.
In one embodiment, the step of transmitting data over the set of available subcarriers comprises: acquiring subcarrier information used by a sender in a data transmission process; and sending the subcarrier use information of the sender to a corresponding receiver so that the receiver receives the data transmitted by the sender according to the subcarrier use information.
Optionally, the subcarrier usage information may be added to the data to be transmitted before data transmission and sent to the receiving side, so that the subcarrier usage information is consistent between the sending side and the receiving side.
Optionally, the remapped subcarriers may be selected according to an algorithm, including but not limited to: selecting the subcarrier with the minimum interference, selecting the subcarrier with the minimum signal-to-interference-and-noise ratio, performing hash mapping, randomly selecting and the like. The selection result of the remapped sub-carriers is kept consistent between the sender and the receiver.
The embodiment ensures that the use conditions of the remapped subcarriers are kept consistent between the sender and the receiver by knowing the mode of the sender and the receiver, and can effectively ensure the accuracy of data transmission.
In order to better understand the above method, an application example of the interference-free transmission method of the present invention is described in detail below. Fig. 9 is a diagram of an exemplary implementation of the interference-free transmission method. As shown in fig. 9, the transmission bandwidth includes a plurality of in-band sub-carriers, and out-of-band sub-carriers, each having a corresponding number. Wherein, 5 sub-carriers of the in-band sub-carriers are interfered, and the numbers of the sub-carriers are respectively 2, 3, 10, 17 and 23; now 5 subcarriers are randomly selected out of band from both sides of the transmission bandwidth as remapped subcarriers. The remapped sub-carriers are numbered according to the frequency distance from the center in the band, and the same distance is numbered according to the height of the frequency, as shown in fig. 9, the numbers of the remapped sub-carriers are 0, 1, 2, 3 and 4 respectively. And determining the corresponding relation between the numbers of the remapped subcarriers and the interfered subcarriers. For example, the order mapping: 2-0, 3-1, 10-2, 17-3, and 23-4 (as shown in fig. 7), the remapped subcarriers and the non-interfered subcarriers constitute a set of available subcarriers through which to transmit data to be transmitted: and modulating the data to be transmitted corresponding to the interfered subcarrier onto the remapped subcarrier for transmission according to the sequential mapping relation, and modulating the data to be transmitted corresponding to the non-interfered subcarrier onto the non-interfered subcarrier for transmission.
It should be noted that, for the sake of simplicity, the foregoing method embodiments are described as a series of acts or combinations, but those skilled in the art should understand that the present invention is not limited by the described order of acts, as some steps may be performed in other orders or simultaneously according to the present invention.
Based on the same idea as the anti-interference transmission method in the above embodiment, the present invention further provides an anti-interference transmission apparatus, which can be used to execute the above anti-interference transmission method. For convenience of illustration, the structure of the embodiment of the interference rejection apparatus is only shown in the schematic diagram, and those skilled in the art will understand that the illustrated structure does not constitute a limitation to the apparatus, and may include more or less components than those illustrated, or combine some components, or arrange different components.
As shown in fig. 10, the interference-free transmission apparatus includes an interfering subcarrier determination module 310, a remapped subcarrier selection module 320, and a data transmission module 330.
An interfering sub-carrier determining module 310 configured to determine an interfered sub-carrier within a transmission bandwidth.
A remap subcarrier selecting module 320, configured to select a remap subcarrier from the out-of-band on both sides of the transmission bandwidth according to the interfered subcarrier; and combining the selected remapped sub-carriers and the non-interfered sub-carriers in the transmission bandwidth to obtain an available sub-carrier set.
And a data transmission module 330, configured to transmit data through the set of available subcarriers.
The embodiment avoids using interfered subcarriers to transmit data aiming at interference in an OFDM system, supplements the interference through the remapped subcarriers reasonably selected, and keeps the logical continuity of the subcarriers, thereby achieving the effects of ensuring the transmission rate, reducing the time delay and reducing the power consumption.
In one embodiment, the remapped sub-carrier selecting module is further configured to determine the number of interfered sub-carriers; and within the range of the number of FFT/IFFT operation points, selecting a corresponding number of subcarriers from the two sides of the transmission bandwidth according to the number to obtain remapped subcarriers.
In an embodiment, the data transmission module is further configured to determine a number of each subcarrier in the available subcarrier set, and modulate data to be transmitted onto subcarriers in the available subcarrier set according to the number for transmission.
In one embodiment, the data transmission module includes: a first number obtaining sub-module, configured to obtain a first number of a remapped subcarrier and a second number of an undisturbed subcarrier, respectively, to form a number of each subcarrier in the available subcarrier set; the first data modulation submodule is used for acquiring a third number of an interfered subcarrier and determining the mapping relation between the first number and the third number; modulating data to be transmitted corresponding to the interfered subcarrier to the remapping subcarrier for transmission according to the mapping relation; and the second data modulation submodule is used for modulating the corresponding data to be transmitted to the undisturbed subcarrier for transmission according to the second number.
In an embodiment, the data transmission module is further configured to number the remapped subcarriers according to the frequency.
In an embodiment, the data transmission module is further configured to number each remapped subcarrier according to a frequency difference between the remapped subcarrier and an inband center frequency of the transmission bandwidth.
In one embodiment, the data transmission module includes: a second number obtaining sub-module, configured to renumber all subcarriers in the available subcarrier set to obtain new numbers corresponding to the subcarriers; and the third data modulation submodule is used for modulating all the data to be transmitted to the subcarriers in the available subcarrier set according to the new serial numbers for transmission.
In an embodiment, the data transmission module is further configured to obtain subcarrier information used by a sender in a data transmission process; and sending the subcarrier use information of the sender to a corresponding receiver so that the receiver receives the data transmitted by the sender according to the subcarrier use information.
It should be noted that, the anti-interference transmission apparatus of the present invention corresponds to the anti-interference transmission method of the present invention one to one, and the technical features and the advantageous effects described in the embodiments of the anti-interference transmission method are all applicable to the embodiments of the anti-interference transmission apparatus, and specific contents may refer to the description in the embodiments of the method of the present invention, which is not described herein again, and thus, the present invention is stated herein.
In addition, in the above exemplary embodiment of the antijamming transmission apparatus, the logical division of each program module is only an example, and in practical applications, the above functions may be allocated by different program modules according to needs, for example, due to the configuration requirements of corresponding hardware or the convenience of implementation of software, that is, the internal structure of the antijamming transmission apparatus is divided into different program modules to complete all or part of the above described functions.
In one embodiment, a computer device is provided, which may be a server, and its internal structure diagram may be as shown in fig. 11. The computer device includes a processor, a memory, a network interface, and a database connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The database of the computer device may be used to store data to be transmitted. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to implement a method of interference-free transmission.
Those skilled in the art will appreciate that the architecture shown in fig. 11 is merely a block diagram of some of the structures associated with the disclosed aspects and is not intended to limit the computing devices to which the disclosed aspects apply, as particular computing devices may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.
In one embodiment, a computer device is provided, comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, the processor implementing the following steps when executing the computer program: determining interfered subcarriers in a transmission bandwidth; selecting a remapping subcarrier from the two sides of the transmission bandwidth according to the interfered subcarrier; combining to obtain an available subcarrier set according to the selected remapped subcarriers and the undisturbed subcarriers in the transmission bandwidth; and transmitting data through the available subcarrier set.
The embodiment avoids using interfered subcarriers to transmit data aiming at interference in an OFDM system, supplements the interference through the remapped subcarriers reasonably selected, and keeps the logical continuity of the subcarriers, thereby achieving the effects of ensuring the transmission rate, reducing the time delay and reducing the power consumption.
In one embodiment, the processor, when executing the computer program, further performs the steps of: determining the number of the interfered subcarriers; and within the range of the number of FFT/IFFT operation points, selecting a corresponding number of subcarriers from the two sides of the transmission bandwidth according to the number to obtain remapped subcarriers.
In one embodiment, the processor, when executing the computer program, further performs the steps of: and determining the number of each subcarrier in the available subcarrier set, and modulating the data to be transmitted to the subcarriers in the available subcarrier set according to the number for transmission.
In one embodiment, the processor, when executing the computer program, further performs the steps of: respectively acquiring a first number of a remapped subcarrier and a second number of an undisturbed subcarrier to form the number of each subcarrier in the available subcarrier set; acquiring a third number of an interfered subcarrier, and determining a mapping relation between the first number and the third number; modulating data to be transmitted corresponding to the interfered subcarrier to the remapping subcarrier for transmission according to the mapping relation; and modulating the corresponding data to be transmitted to the undisturbed subcarrier for transmission according to the second number.
In one embodiment, the processor, when executing the computer program, further performs the steps of: each remapped subcarrier is numbered according to the frequency.
In one embodiment, the processor, when executing the computer program, further performs the steps of: and numbering each remapping subcarrier according to the frequency difference value of the in-band center frequency of each remapping subcarrier and the transmission bandwidth.
In one embodiment, the processor, when executing the computer program, further performs the steps of: all subcarriers in the available subcarrier set are numbered again to obtain new numbers corresponding to the subcarriers; and modulating all data to be transmitted to the subcarriers in the available subcarrier set according to the new serial numbers for transmission.
In one embodiment, the processor, when executing the computer program, further performs the steps of: acquiring subcarrier information used by a sender in a data transmission process; and sending the subcarrier use information of the sender to a corresponding receiver so that the receiver receives the data transmitted by the sender according to the subcarrier use information.
In one embodiment, a computer-readable storage medium is provided, having a computer program stored thereon, which when executed by a processor, performs the steps of: determining interfered subcarriers in a transmission bandwidth; selecting a remapping subcarrier from the two sides of the transmission bandwidth according to the interfered subcarrier; combining to obtain an available subcarrier set according to the selected remapped subcarriers and the undisturbed subcarriers in the transmission bandwidth; and transmitting data through the available subcarrier set.
In one embodiment, the computer program when executed by the processor further performs the steps of: determining the number of the interfered subcarriers; and within the range of the number of FFT/IFFT operation points, selecting a corresponding number of subcarriers from the two sides of the transmission bandwidth according to the number to obtain remapped subcarriers.
In one embodiment, the computer program when executed by the processor further performs the steps of: and determining the number of each subcarrier in the available subcarrier set, and modulating the data to be transmitted to the subcarriers in the available subcarrier set according to the number for transmission.
In one embodiment, the computer program when executed by the processor further performs the steps of: respectively acquiring a first number of a remapped subcarrier and a second number of an undisturbed subcarrier to form the number of each subcarrier in the available subcarrier set; acquiring a third number of an interfered subcarrier, and determining a mapping relation between the first number and the third number; modulating data to be transmitted corresponding to the interfered subcarrier to the remapping subcarrier for transmission according to the mapping relation; and modulating the corresponding data to be transmitted to the undisturbed subcarrier for transmission according to the second number.
In one embodiment, the computer program when executed by the processor further performs the steps of: each remapped subcarrier is numbered according to the frequency.
In one embodiment, the computer program when executed by the processor further performs the steps of: and numbering each remapping subcarrier according to the frequency difference value of the in-band center frequency of each remapping subcarrier and the transmission bandwidth.
In one embodiment, the computer program when executed by the processor further performs the steps of: all subcarriers in the available subcarrier set are numbered again to obtain new numbers corresponding to the subcarriers; and modulating all data to be transmitted to the subcarriers in the available subcarrier set according to the new serial numbers for transmission.
In one embodiment, the computer program when executed by the processor further performs the steps of: acquiring subcarrier information used by a sender in a data transmission process; and sending the subcarrier use information of the sender to a corresponding receiver so that the receiver receives the data transmitted by the sender according to the subcarrier use information.
It will be understood by those skilled in the art that all or part of the processes of the methods of the above embodiments may be implemented by a computer program, which is stored in a computer readable storage medium and sold or used as a stand-alone product. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
The terms "comprises" and "comprising," and any variations thereof, of embodiments of the present invention are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or (module) elements is not limited to only those steps or elements but may alternatively include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-described examples merely represent several embodiments of the present invention and should not be construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. An anti-interference transmission method, comprising the steps of:
determining interfered subcarriers in a transmission bandwidth; determining the number of the interfered subcarriers;
within the range of FFT/IFFT operation points, selecting a remapping subcarrier from two sides of the transmission bandwidth according to the interfered subcarrier; combining to obtain an available subcarrier set according to the selected remapped subcarriers and the undisturbed subcarriers in the transmission bandwidth;
transmitting data over the set of available subcarriers;
the selecting a remapped sub-carrier out-of-band from both sides of the transmission bandwidth according to the interfered sub-carrier comprises: selecting out-of-band subcarriers from the two sides of the transmission bandwidth according to the number of the interfered subcarriers as remapping subcarriers;
transmitting data over the set of available subcarriers, comprising: determining the interfered degree of the interfered subcarrier, replacing the severely interfered subcarrier with the remapped subcarrier, and respectively obtaining a first number of the remapped subcarrier and a second number of the subcarrier which is not interfered to form the number of each subcarrier in the available subcarrier set; acquiring a third number of an interfered subcarrier, and determining a mapping relation between the first number and the third number; modulating data to be transmitted corresponding to the interfered subcarrier to the remapping subcarrier for transmission according to the mapping relation; and modulating the corresponding data to be transmitted to the undisturbed subcarrier for transmission according to the second number.
2. The interference-resistant transmission method of claim 1, wherein said step of transmitting data over said set of available subcarriers comprises:
and determining the number of each subcarrier in the available subcarrier set, and modulating the data to be transmitted to the subcarriers in the available subcarrier set according to the number for transmission.
3. The interference-free transmission method of claim 1, wherein the step of obtaining the first number of the remapped sub-carriers is preceded by the step of:
each remapped subcarrier is numbered according to the frequency.
4. The interference-free transmission method of claim 1, wherein the step of obtaining the first number of the remapped sub-carriers is preceded by the step of:
and numbering each remapping subcarrier according to the frequency difference value of the in-band center frequency of each remapping subcarrier and the transmission bandwidth.
5. The interference-free transmission method according to claim 2, wherein the step of determining the number of each subcarrier in the set of available subcarriers, and modulating data to be transmitted onto the subcarriers in the set of available subcarriers according to the number for transmission comprises:
all subcarriers in the available subcarrier set are numbered again to obtain new numbers corresponding to the subcarriers;
and modulating all data to be transmitted to the subcarriers in the available subcarrier set according to the new serial numbers for transmission.
6. The interference-free transmission method according to any of claims 1 to 5, wherein the step of transmitting data via the set of available subcarriers comprises:
acquiring subcarrier information used by a sender in a data transmission process; and sending the subcarrier use information of the sender to a corresponding receiver so that the receiver receives the data transmitted by the sender according to the subcarrier use information.
7. An apparatus for interference-free transmission, comprising:
an interference subcarrier determining module, configured to determine an interfered subcarrier within a transmission bandwidth; determining the number of the interfered subcarriers;
the remapping subcarrier selecting module is used for selecting the remapping subcarrier from the two sides of the transmission bandwidth according to the interfered subcarrier within the range of FFT/IFFT operation points; combining to obtain an available subcarrier set according to the selected remapped subcarriers and the undisturbed subcarriers in the transmission bandwidth;
and a data transmission module, configured to perform data transmission through the set of available subcarriers;
the remapping subcarrier selecting module is also used for selecting out-of-band subcarriers from two sides of the transmission bandwidth according to the number of the interfered subcarriers to serve as the remapping subcarriers;
the data transmission module is further used for determining the interfered degree of the interfered subcarrier, replacing the severely interfered subcarrier with the remapped subcarrier, and respectively obtaining a first number of the remapped subcarrier and a second number of the subcarrier which is not interfered to form the number of each subcarrier in the available subcarrier set; acquiring a third number of an interfered subcarrier, and determining a mapping relation between the first number and the third number; modulating data to be transmitted corresponding to the interfered subcarrier to the remapping subcarrier for transmission according to the mapping relation; and modulating the corresponding data to be transmitted to the undisturbed subcarrier for transmission according to the second number.
8. The antijamming transmission device of claim 7, wherein the data transmission module is further configured to determine a number of each subcarrier in the available subcarrier set, and modulate data to be transmitted onto the subcarriers in the available subcarrier set according to the number for transmission.
9. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the steps of the method for interference rejection transmission according to any one of claims 1 to 6 are implemented when the program is executed by the processor.
10. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method for interference-free transmission according to any one of claims 1 to 6.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101562484A (en) * | 2009-06-01 | 2009-10-21 | 北京北方烽火科技有限公司 | Method applicable to measuring channel quality of OFDM system |
| CN101682598A (en) * | 2007-03-15 | 2010-03-24 | 诺基亚西门子通信有限责任两合公司 | Method for optimizing signals with multiple subcarriers |
| CN101902816A (en) * | 2009-05-27 | 2010-12-01 | 中兴通讯股份有限公司 | Resource mapping and resource mapping indication method based on protective subcarriers |
| CN105451344A (en) * | 2015-12-07 | 2016-03-30 | 合肥东芯通信股份有限公司 | Carrier shielding method for LTE (Long Term Evolution) system, base station and terminal |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8290447B2 (en) * | 2007-01-19 | 2012-10-16 | Wi-Lan Inc. | Wireless transceiver with reduced transmit emissions |
-
2018
- 2018-01-11 CN CN201810026848.XA patent/CN108390841B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101682598A (en) * | 2007-03-15 | 2010-03-24 | 诺基亚西门子通信有限责任两合公司 | Method for optimizing signals with multiple subcarriers |
| CN101902816A (en) * | 2009-05-27 | 2010-12-01 | 中兴通讯股份有限公司 | Resource mapping and resource mapping indication method based on protective subcarriers |
| CN101562484A (en) * | 2009-06-01 | 2009-10-21 | 北京北方烽火科技有限公司 | Method applicable to measuring channel quality of OFDM system |
| CN105451344A (en) * | 2015-12-07 | 2016-03-30 | 合肥东芯通信股份有限公司 | Carrier shielding method for LTE (Long Term Evolution) system, base station and terminal |
Non-Patent Citations (1)
| Title |
|---|
| 《Game-theoretical Frequency Reuse Method for Complex Cognitive Femto-cell Network》;ZHOU Xiong等;《2013 8th International Conference on Communications and Networking in China (CHINACOM)》;20140106;全文 * |
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