CN109412630B - Self-interference elimination method, terminal and computer storage medium - Google Patents
Self-interference elimination method, terminal and computer storage medium Download PDFInfo
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- CN109412630B CN109412630B CN201811369586.3A CN201811369586A CN109412630B CN 109412630 B CN109412630 B CN 109412630B CN 201811369586 A CN201811369586 A CN 201811369586A CN 109412630 B CN109412630 B CN 109412630B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/50—Circuits using different frequencies for the two directions of communication
- H04B1/52—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa
- H04B1/525—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa with means for reducing leakage of transmitter signal into the receiver
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Abstract
The embodiment of the application discloses a self-interference elimination method, a terminal and a computer storage medium, wherein the self-interference elimination method is applied to the terminal configured with two transmitting antennas, the terminal is further configured with a phase inverter and a time delay module, and the self-interference elimination method comprises the following steps: transmitting a first signal X by a first transmitting antenna in n time units; wherein n is an integer greater than 1; controlling a second transmitting antenna to transmit a second signal Y according to n time units through a phase inverter and a delay module; wherein X and Y are the same in size and opposite in phase; the overall received signal P is received by the receiving antenna in n +1 time units.
Description
Technical Field
The embodiment of the application relates to the technical field of terminal communication, in particular to a self-interference elimination method, a terminal and a computer storage medium.
Background
The full duplex mode used by the Fifth generation mobile communication technology (5G) is a communication mode in which reception and transmission are performed simultaneously at the same frequency, and it can not only perform transmission and reception simultaneously and the transmission and reception frequencies are the same, which greatly saves the spectrum resources, but also can improve the existing communication rate.
However, the biggest problem encountered in the same-frequency full duplex communication is that strong self-interference exists, that is, the transmission of the communication device itself interferes with the reception of the communication device itself, and the received signal is a signal with extremely weak strength, so that the superior performance of 5G is greatly reduced once the signal is interfered, which causes the demodulation difficulty between the terminal and the base station, thereby limiting the popularization and application of the same-frequency full duplex.
Disclosure of Invention
The embodiment of the application provides a self-interference elimination method, a terminal and a computer storage medium, which can effectively eliminate self-interference of a full-duplex system, thereby greatly improving the superiority of the full-duplex system.
The technical scheme of the embodiment of the application is realized as follows:
the embodiment of the application provides a self-interference elimination method, which is applied to a terminal configured with two transmitting antennas, wherein the terminal is also configured with an inverter and a time delay module, and is characterized by comprising the following steps:
transmitting a first signal X by a first transmitting antenna in n time units; wherein n is an integer greater than 1;
controlling a second transmitting antenna to transmit a second signal Y according to the n time units through the phase inverter and the time delay module; wherein X and Y are the same in size and opposite in phase;
and receiving the overall received signal P according to the n +1 time units through the receiving antenna.
Optionally, the controlling, by the inverter and the delay module, the second transmitting antenna to transmit the second signal Y according to the n time units includes:
obtaining a delay parameter t through the delay module; wherein t is greater than one time unit;
carrying out inversion processing on the X through the inverter to obtain the Y;
and transmitting the Y according to the t through the second transmitting antenna.
Optionally, the first transmitting antenna and the second transmitting antenna set a same interference parameter a, where a is a natural number greater than or equal to zero; the receiving the overall received signal P by the receiving antenna according to the n +1 time units includes:
and receiving a target signal Q, a first interference signal aX corresponding to the first transmitting antenna and a second interference signal aY corresponding to the second transmitting antenna through a receiving antenna according to the n +1 time units.
Optionally, in the first time unit, the overall received signal P1 received by the receiving antenna includes: a first interfering signal aX1 received within the first time unit and a target signal Q1 received within the first time unit;
in the second time unit, the overall received signal P2 received by the receiving antenna includes: a first interfering signal aX2 received in the second time unit, a second interfering signal aY1 received in the second time unit, and a target signal Q2 received in the second time unit;
in the nth time unit, the overall received signal Pn received by the receiving antenna includes: a first interfering signal aXn received in the nth time unit, a second interfering signal aY (n-1) received in the nth time unit, and a target signal Qn received in the nth time unit;
in the (n +1) th time unit, the overall received signal P (n +1) received by the receiving antenna includes: a second interfering signal aYn received within the n +1 time unit and a target signal Q (n +1) received within the n +1 time unit.
Optionally, the summation calculation is performed on all n +1 overall received signals corresponding to all n +1 time units, so as to obtain the overall received signal of which the target signal of n +1 time units is equal to the overall received signal of n +1 time units.
Optionally, the terminal is further configured with a gain adjustment module, and the method further includes:
and setting the interference parameters of the first transmitting antenna and the interference parameters of the second transmitting antenna through the gain adjusting module so as to ensure that the first transmitting antenna and the second transmitting antenna have the same interference parameters.
The embodiment of the present application provides a terminal, the terminal includes: a transmitting unit and a receiving unit, wherein the terminal is provided with two transmitting antennas, the terminal is also provided with an inverter and a time delay module,
the transmitting unit is used for transmitting a first signal X according to n time units through a first transmitting antenna; wherein n is an integer greater than 1; controlling a second transmitting antenna to transmit a second signal Y according to the n time units through the phase inverter and the time delay module; wherein X and Y are the same in size and opposite in phase;
and the receiving unit is used for receiving the overall received signal P through the receiving antenna according to the n +1 time units.
Optionally, the transmitting unit is specifically configured to obtain a delay parameter t through the delay module; wherein t is greater than one time unit; and carrying out inversion processing on the X through the inverter to obtain the Y; and transmitting said Y according to said t through said second transmit antenna.
Optionally, the first transmitting antenna and the second transmitting antenna set a same interference parameter a, where a is a natural number greater than or equal to zero;
the receiving unit is specifically configured to receive, through a receiving antenna, a target signal Q, a first interference signal aX corresponding to the first transmitting antenna, and a second interference signal aY corresponding to the second transmitting antenna according to the n +1 time units.
Optionally, the receiving unit is specifically configured to, in a first time unit, receive the overall received signal P1 through the receiving antenna, where the overall received signal P1 includes: a first interfering signal aX1 received within the first time unit and a target signal Q1 received within the first time unit; and in a second time unit, the overall received signal P2 received by the receiving antenna includes: a first interfering signal aX2 received in the second time unit, a second interfering signal aY1 received in the second time unit, and a target signal Q2 received in the second time unit; and the overall received signal Pn received by the receiving antenna in the nth time unit includes: a first interfering signal aXn received in the nth time unit, a second interfering signal aY (n-1) received in the nth time unit, and a target signal Qn received in the nth time unit; and the overall received signal P (n +1) received by the receiving antenna in the (n +1) th time unit includes: a second interfering signal aYn received within the n +1 time unit and a target signal Q (n +1) received within the n +1 time unit.
Optionally, the terminal further comprises a computing unit and an adjusting unit,
the calculating unit is configured to perform summation calculation on all n +1 overall received signals corresponding to all n +1 time units, so as to obtain the overall received signal of which the target signal of the n +1 time units is equal to the n +1 time units;
the adjusting unit is configured to set, through the gain adjusting module, the interference parameter of the first transmitting antenna and the interference parameter of the second transmitting antenna, so as to ensure that the first transmitting antenna and the second transmitting antenna have the same interference parameter.
An embodiment of the present application provides a terminal, where the terminal includes a first transmitting antenna, a second transmitting antenna, a receiving antenna, an inverter, a delay module, a gain adjustment module, a processor, and a memory storing executable instructions of the processor, where when the instructions are executed, the processor implements the self-interference cancellation method as described above when executed.
Optionally, the terminal further includes a gain adjustment module.
An embodiment of the present application provides a computer-readable storage medium, on which a program is stored, and the program is applied in a terminal, and when the program is executed by a processor, the self-interference cancellation method is implemented as described above.
The embodiment of the application provides a self-interference elimination method, a terminal and a computer storage medium, wherein the self-interference elimination method is applied to the terminal configured with two transmitting antennas, the terminal is further configured with an inverter and a delay module, and the self-interference elimination method comprises the following steps: the terminal transmits a first signal X according to n time units through a first transmitting antenna; wherein n is an integer greater than 1; controlling a second transmitting antenna to transmit a second signal Y according to n time units through a phase inverter and a delay module; wherein X and Y are the same in size and opposite in phase; the overall received signal P is received by the receiving antenna in n +1 time units. Therefore, according to the self-interference elimination method provided by the application, the terminal is provided with the different transmitting antennas, the different time delay modules and the different phase inverters, and in n time units, the self-interference caused by the first transmitting antenna and the second transmitting antenna to the receiving antenna can be offset, so that the whole receiving signal received by the receiving antenna is the target signal without the self-interference, the self-interference of the full-duplex system is effectively eliminated, and the superiority of the full-duplex system is greatly improved.
Drawings
Fig. 1 is a schematic flow chart illustrating an implementation of a self-interference cancellation method according to an embodiment of the present application;
fig. 2 is a first schematic diagram of an embodiment of a self-interference cancellation proposed in the present application;
fig. 3 is a schematic diagram of a self-interference cancellation implementation proposed in the present application;
fig. 4 is a first schematic structural diagram of a terminal according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of a terminal according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant application and are not limiting of the application. It should be noted that, for the convenience of description, only the parts related to the related applications are shown in the drawings.
In the future, a new communication working mode, namely a full-duplex communication mode, is used for 5G communication. The existing communication mode is mainly a half-duplex mode, which utilizes orthogonal time slot intervals to transmit and receive, that is, when the system is receiving, the transmitting function is closed; while when the system is transmitting, the same reception will be off. This mode of operation can result in a significant waste of resources of the spectrum. The full duplex mode used by the 5G communication is a communication mode for simultaneously carrying out receiving and transmitting at the same frequency, and the full duplex mode not only can carry out transmitting and receiving at the same time, but also has the same frequency for transmitting and receiving, thereby greatly saving frequency spectrum resources, and simultaneously improving the existing communication rate. But this approach necessarily causes a new problem, namely co-channel interference between transmission and reception.
The existing communication mode is mainly half Duplex, and includes two types, namely, time-Division Duplex (TDD) and Frequency Division Duplex (FDD), in which the former type can only receive in the first half of time sequence and transmit in the second half of time sequence, or transmit in the first half of time sequence and receive in the second half of time sequence, although the former type can use the same spectrum resource for transmission and reception. The latter can achieve simultaneous receiving and transmitting, but the two adopt different frequency spectrum resources.
In order to fully utilize precious spectrum resources and maximize spectrum efficiency and system capacity, it is an important direction to develop a co-frequency full duplex system. However, the co-frequency full duplex communication has a problem that strong self-interference exists, which causes the demodulation difficulty between the terminal and the base station, that is, the transmission of the communication device itself interferes with the reception of the communication device itself, thereby limiting the popularization and application of the co-frequency full duplex.
Therefore, the embodiment of the application provides a design scheme for realizing self-elimination of a full-duplex system based on dual-transmitting-end TX delay transmission, and can effectively eliminate self-interference of the full-duplex system, thereby greatly improving the superiority of the full-duplex system.
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.
An embodiment of the present application provides a self-interference cancellation method, which is applied to a terminal configured with two transmitting antennas, where the terminal is further configured with an inverter and a delay module, and fig. 1 is a schematic flow chart illustrating an implementation of the self-interference cancellation method provided in the embodiment of the present application, and as shown in fig. 1, in the embodiment of the present application, the method for the terminal to perform packet transmission may include the following steps:
In an embodiment of the present application, a terminal may transmit a first signal X in n time units through a first transmit antenna; wherein n is an integer greater than 1.
It should be noted that, in the embodiment of the present application, the terminal is configured with two transmitting antennas, that is, the first transmitting antenna and the second transmitting antenna. Specifically, the terminal may be configured with one receiving antenna.
Further, in the present application, the terminal may be any terminal equipped with two transmitting antennas and having communication and storage functions, for example: the mobile terminal comprises a tablet computer, a terminal, an electronic reader, a remote controller, a Personal Computer (PC), a notebook computer, a vehicle-mounted device, a network television, a wearable device and other terminals.
In the embodiment of the present application, the terminal may perform centralized processing on a series of data to be transmitted, and may be configured to transmit the series of data in the n time units. Wherein n is an integer greater than 1.
Further, in this embodiment of the present application, the terminal may first transmit the first signal X according to the n time units through the configured first transmitting antenna. The terminal may transmit one first signal X in each of the n time units.
It should be noted that, in the embodiment of the present application, the terminal may transmit the first signal X1 in the first time unit, transmit the first signal X2 in the second time unit, and transmit the first signal Xn in the nth time unit.
102, controlling a second transmitting antenna to transmit a second signal Y according to n time units through a phase inverter and a delay module; wherein X and Y are the same in magnitude and opposite in phase.
In the embodiment of the present application, while the terminal transmits the first signal X according to n time units through the first transmitting antenna, the terminal may further control the second transmitting antenna to transmit the second signal Y according to the n time units through the inverter and the delay module.
It should be noted that, in the embodiment of the present application, the terminal may also be configured with an inverter and a delay module. The inverter is used for generating a second signal Y with the same magnitude and opposite phase according to the first signal X; the delay module is used for carrying out transmission delay control on the second transmitting antenna.
Further, in an implementation of the present application, the terminal may generate a second signal Y with a phase opposite to that of the first signal X according to the first signal X and the inverter while transmitting the first signal X through the first transmitting antenna, and then control the second transmitting antenna to transmit the second signal Y according to the n time units through the delay module.
It should be noted that, in the embodiment of the present application, the terminal may transmit the second signal Y according to the n time units through the configured second transmitting antenna. The terminal may transmit one of the second signals Y in each of the n time units.
Further, in the embodiment of the present application, the terminal may transmit the second signal Y1 in the first time unit, transmit the second signal Y2 in the second time unit, and transmit the second signal Yn in the nth time unit.
In the embodiment of the present application, the terminal transmits the first signal X according to n time units through the first transmitting antenna, and controls the second transmitting antenna to transmit the second signal Y according to the n time units through the inverter and the delay module, and simultaneously may receive the overall received signal P according to the n +1 time units through the receiving antenna.
In the embodiment of the present application, the terminal may include, in the overall received signal P received by the receiving antenna in n +1 time units, the target signal P received by the receiving antenna in n +1 time units, the first interference signal aX generated by the first transmitting antenna in n time units, and the second interference signal aY generated by the second transmitting antenna in n time units. Wherein, a is the interference parameter set for the first transmitting antenna and the second transmitting antenna, that is, the interference parameter for the first transmitting antenna and the interference parameter for the second transmitting antenna are the same.
It should be noted that, in the embodiment of the present application, the target signal P may represent that the terminal receives a signal sent by another terminal or a base station and not including transmit antenna interference.
Further, in the embodiment of the present application, the terminal may set the interference signals of the first transmitting antenna and the second transmitting antenna to be very close, that is, the interference degree of the first transmitting antenna and the second transmitting antenna to the receiving antenna may be considered to be the same.
In an embodiment of the present application, in the process of transmitting the first signal X by the first transmitting antenna according to the n time units, the first interfering signal aX is generated to the receiving antenna by the first transmitting antenna. The first transmitting antenna may generate a first interference signal aX in each of the n time units.
Further, in the embodiment of the present application, the first transmitting antenna may generate the first interference signal aX1 in the first time unit, generate the first interference signal aX2 in the second time unit, and generate the first interference signal aXn in the nth time unit.
In this embodiment, in the process of transmitting the second signal Y by the second transmitting antenna according to the n time units, the second interference signal aY is generated for the receiving antenna. The second transmitting antenna may generate a second interference signal aY in each of the n time units.
Further, in the embodiment of the present application, the second transmitting antenna may generate the second interference signal aY1 in the first time unit, generate the second interference signal aY2 in the second time unit, and generate the second interference signal aYn in the nth time unit.
It should be noted that, in the embodiment of the present application, when the terminal receives the overall received signal through the receiving antenna, since the delay parameter may be a parameter greater than one time unit, in a first time unit, the overall received signal received by the receiving antenna only includes the first interference signal aX1 and the target signal Q1 generated by the first transmitting antenna.
Further, in the embodiment of the present application, when the terminal receives the overall received signal through the receiving antenna, since the delay parameter may be a parameter greater than one time unit, in the nth time unit, the overall received signal received by the receiving antenna includes the first interference signal aXn generated by the first transmitting antenna, the second interference signal aY (n-1) generated by the second transmitting antenna, and the target signal Qn, and does not include the second interference signal aYn generated by the second transmitting antenna, and therefore, the terminal needs to continue to receive the overall received signal through the transmitting antenna in the (n +1) th time unit, so that the second interference signal aYn and the target signal Q (n +1) generated by the second transmitting antenna can be received in the (n +1) th time unit.
In an embodiment of the present application, since the first signal X and the second signal Y are signals having the same magnitude and opposite phases, and the first transmitting antenna and the second transmitting antenna have the same interference parameter a, after the terminal receives the overall received signal in the n +1 time units through the receiving antenna, the terminal may sum all n +1 overall received signals corresponding to all n +1 time units to obtain the overall received signal in which the target signal in the n +1 time units is equal to the n +1 time units. That is to say, the self-interference cancellation method provided by the present application may perform time-delay transmission by using two different transmitting antennas, so that the interference signal generated by the transmitting antenna is cancelled from the signal received by the receiving antenna.
The embodiment of the application provides a self-interference elimination method, which is applied to a terminal configured with two transmitting antennas, wherein the terminal is further configured with an inverter and a delay module, and the self-interference elimination method comprises the following steps: the terminal transmits a first signal X according to n time units through a first transmitting antenna; wherein n is an integer greater than 1; controlling a second transmitting antenna to transmit a second signal Y according to n time units through a phase inverter and a delay module; wherein X and Y are the same in size and opposite in phase; the overall received signal P is received by the receiving antenna in n +1 time units. Therefore, according to the self-interference elimination method provided by the application, the terminal is provided with the different transmitting antennas, the different time delay modules and the different phase inverters, and in n time units, the self-interference caused by the first transmitting antenna and the second transmitting antenna to the receiving antenna can be offset, so that the whole receiving signal received by the receiving antenna is the target signal without the self-interference, the self-interference of the full-duplex system is effectively eliminated, and the superiority of the full-duplex system is greatly improved.
Based on the foregoing embodiment, in another embodiment of the present application, the method for the terminal to perform the self-interference cancellation method specifically includes the following steps:
step 201, in a first time unit, the overall received signal P1 received by the receiving antenna includes: a first interfering signal aX1 received within a first time unit and a target signal Q1 received within the first time unit.
In an embodiment of the present application, in a first time unit, the overall received signal P1 received by the terminal through the receiving antenna may include a first interference signal aX1 received in the first time unit and a target signal Q1 received in the first time unit.
It should be noted that, in the embodiment of the present application, the overall received signal P1 received by the terminal in the first time unit through the receiving antenna may be obtained through the following formula:
P1＝aX1+Q1 (1)
step 202, in the second time unit, the overall received signal P2 received by the receiving antenna includes: the first interfering signal aX2 received in the second time unit, the second interfering signal aY1 received in the second time unit, and the target signal Q2 received in the second time unit.
In an embodiment of the present application, in the second time unit, the overall received signal P2 received by the terminal through the receiving antenna may include the first interference signal aX2 received in the second time unit, the second interference signal aY1 received in the second time unit, and the target signal Q2 received in the second time unit.
It should be noted that, in the embodiment of the present application, the overall received signal P2 received by the terminal in the second time unit through the receiving antenna may be obtained through the following formula:
P2＝aX2+aY1+Q2 (2)
step 203, in the nth time unit, the overall received signal Pn received by the receiving antenna includes: a first interference signal aXn received in the nth time unit, a second interference signal aY (n-1) received in the nth time unit, and a target signal Qn received in the nth time unit.
In the embodiment of the present application, in the nth time unit, the overall received signal Pn received by the terminal through the receiving antenna may include the first interference signal aXn received in the nth time unit, the second interference signal aY (n-1) received in the nth time unit, and the target signal Qn received in the nth time unit.
It should be noted that, in the embodiment of the present application, the overall received signal Pn received by the terminal in the nth time unit through the receiving antenna may be obtained through the following formula:
Pn＝aXn+aY(n-1)+Qn (3)
step 204, in the (n +1) th time unit, the whole received signal P (n +1) received by the receiving antenna includes: a second interfering signal aYn received during the (n +1) th time unit and a target signal Q (n +1) received during the (n +1) th time unit.
In the embodiment of the present application, in the (n +1) th time unit, the overall received signal P (n +1) received by the terminal through the receiving antenna may include the second interference signal aYn received in the (n +1) th time unit and the target signal Q (n +1) received in the (n +1) th time unit.
In an embodiment of the present application, the overall received signal P (n +1) received by the terminal in the (n +1) th time unit through the receiving antenna may be obtained by the following formula:
P(n+1)＝aYn+Q(n+1) (4)
further, in the embodiment of the present application, when the terminal performs summation calculation on all n +1 overall received signals corresponding to all n +1 time units, based on the above formulas (1) to (4), the overall received signal P of n +1 time units may be obtained as:
P＝aX1+Q1+aX2+aY1+Q2+…+Qn+aYn+Q(n+1) (5)
since the first signal X and the second signal Y are signals having the same magnitude and opposite phases, that is:
X＝-Y (6)
meanwhile, since the first and second transmit antennas have the same interference parameter a, based on the above equations (5) and (6), it is possible to obtain:
P＝Q1+Q2+…+Qn+Q(n+1)＝Q (7)
that is, the overall received signal P received by the terminal through the receiving antenna according to the n +1 time units is the target signal Q received through the receiving antenna according to the n +1 time units, and the interference signal generated by the transmitting antenna is eliminated through the delay processing.
The embodiment of the application provides a self-interference elimination method, which is applied to a terminal configured with two transmitting antennas, wherein the terminal is further configured with an inverter and a delay module, and the self-interference elimination method comprises the following steps: the terminal transmits a first signal X according to n time units through a first transmitting antenna; wherein n is an integer greater than 1; controlling a second transmitting antenna to transmit a second signal Y according to n time units through a phase inverter and a delay module; wherein X and Y are the same in size and opposite in phase; the overall received signal P is received by the receiving antenna in n +1 time units. Therefore, according to the self-interference elimination method provided by the application, the terminal is provided with the different transmitting antennas, the different time delay modules and the different phase inverters, and in n time units, the self-interference caused by the first transmitting antenna and the second transmitting antenna to the receiving antenna can be offset, so that the whole receiving signal received by the receiving antenna is the target signal without the self-interference, the self-interference of the full-duplex system is effectively eliminated, and the superiority of the full-duplex system is greatly improved.
Based on the foregoing embodiment, in yet another embodiment of the present application, the method for controlling the second transmitting antenna to transmit the second signal Y according to the n time units by the terminal through the inverter and the delay module may include the following steps:
102a, obtaining a delay parameter t through a delay module; where t is greater than one time unit.
In the embodiment of the present application, the terminal may first obtain a delay parameter t through a configured delay module.
It should be noted that, in the embodiment of the present application, the time parameter t is a specific parameter greater than one time unit. Specifically, the delay parameter t may be used to perform transmission delay control on the second transmitting antenna.
And 102b, carrying out inversion processing on the X through an inverter to obtain Y.
In an embodiment of the present application, the terminal may further perform an inversion process on the first signal X through an inverter, so as to obtain the second signal Y having the same magnitude as X and an opposite phase.
In the embodiment of the present application, the inverter may be configured to invert the phase of the input first signal X by 180 degrees, and obtain the second signal Y with an opposite phase.
And 102c, transmitting Y according to t through a second transmitting antenna.
In an embodiment of the present application, after the terminal obtains the delay parameter t through the delay module and performs phase inversion processing on X through the inverter to obtain the second signal Y, the terminal may send the second signal Y through the second transmitting antenna according to the delay parameter t.
It should be noted that, in the embodiment of the present application, there is no sequence between the step 102a and the step 102b, and the terminal may also implement the step 102a and the step 102b at the same time, which is not limited in this application.
The embodiment of the application provides a self-interference elimination method, which is applied to a terminal configured with two transmitting antennas, wherein the terminal is further configured with an inverter and a delay module, and the self-interference elimination method comprises the following steps: the terminal transmits a first signal X according to n time units through a first transmitting antenna; wherein n is an integer greater than 1; controlling a second transmitting antenna to transmit a second signal Y according to n time units through a phase inverter and a delay module; wherein X and Y are the same in size and opposite in phase; the overall received signal P is received by the receiving antenna in n +1 time units. Therefore, according to the self-interference elimination method provided by the application, the terminal is provided with the different transmitting antennas, the different time delay modules and the different phase inverters, and in n time units, the self-interference caused by the first transmitting antenna and the second transmitting antenna to the receiving antenna can be offset, so that the whole receiving signal received by the receiving antenna is the target signal without the self-interference, the self-interference of the full-duplex system is effectively eliminated, and the superiority of the full-duplex system is greatly improved.
Based on the foregoing embodiment, in another embodiment of the present application, fig. 2 is a schematic diagram of a self-interference cancellation scheme proposed in the present application, and as shown in fig. 2, a terminal implementing the self-interference cancellation method proposed in the present application may include a transmitting unit, a receiving unit, a delay module, an inverter, a first transmitting antenna, a second transmitting antenna, and a receiving antenna.
Further, based on the above fig. 2, for the first transmit antenna and the second transmit antenna, when designing the terminal, it may be determined that the interference parameters of the two transmit antennas for the receive antenna are close to or the same, and assuming that both are a, the method for the terminal to perform self-interference cancellation may include the following steps:
step 301, the transmitting unit simultaneously transmits a signal M1, and if the received signal is N1, all signals that can be received by the receiving antenna within the first time unit are aM1+ N1.
Step 302, in the second time unit, all signals that can be received by the receiving antenna are aM2-aM1+ N2, and all signals that can be received by the receiving antenna are aMn-aM (N-1) + Nn until the nth time unit according to the algorithm;
step 303, assuming that the receiving unit uses N time units as a series of data for centralized processing, the terminal will automatically use one more time unit to receive the signal in one time unit, i.e. all the signals that can be received by the N +1 th time unit receiving antenna are N (N +1) -aMn.
Step 304, from the first time unit to the (N +1) th time unit, the data string received by the whole terminal is aM1+ N1+ aM2-aM1+ N2+ … + aMn-aM (N-1) + Nn + N (N +1) -aMn, and after the whole data processing, the processed data is N1+ N2+ … + Nn + N (N +1), wherein the interference signal is 0.
Based on the foregoing fig. 2, fig. 3 is a schematic diagram of a second implementation of the self-interference cancellation scheme provided by the present application, and as shown in fig. 3, a terminal implementing the self-interference cancellation method provided by the present application may further include a gain adjustment module.
It should be noted that, in the embodiment of the present application, a main purpose of the gain adjustment module is to adjust an interference degree between the first transmitting antenna and the second transmitting antenna, so as to exactly eliminate interference caused by the first transmitting antenna and the second transmitting antenna on the receiving antenna.
The embodiment of the application provides a self-interference elimination method, which is applied to a terminal configured with two transmitting antennas, wherein the terminal is further configured with an inverter and a delay module, and the self-interference elimination method comprises the following steps: the terminal transmits a first signal X according to n time units through a first transmitting antenna; wherein n is an integer greater than 1; controlling a second transmitting antenna to transmit a second signal Y according to n time units through a phase inverter and a delay module; wherein X and Y are the same in size and opposite in phase; the overall received signal P is received by the receiving antenna in n +1 time units. Therefore, according to the self-interference elimination method provided by the application, the terminal is provided with the different transmitting antennas, the different time delay modules and the different phase inverters, and in n time units, the self-interference caused by the first transmitting antenna and the second transmitting antenna to the receiving antenna can be offset, so that the whole receiving signal received by the receiving antenna is the target signal without the self-interference, the self-interference of the full-duplex system is effectively eliminated, and the superiority of the full-duplex system is greatly improved.
In another embodiment of the present application, fig. 4 is a schematic structural diagram of a terminal according to an embodiment of the present application, and as shown in fig. 4, the terminal 1 according to the embodiment of the present application may include a transmitting unit 11, a receiving unit 12, a calculating unit 13, and an adjusting unit 14.
The transmitting unit 11 is configured to transmit a first signal X through a first transmitting antenna according to n time units; wherein n is an integer greater than 1; controlling a second transmitting antenna to transmit a second signal Y according to the n time units through the phase inverter and the time delay module; wherein X and Y are the same size and opposite in phase.
The receiving unit 12 is configured to receive the overall received signal P through the receiving antenna according to the n +1 time units.
Further, in an embodiment of the present application, the transmitting unit 11 is specifically configured to obtain a delay parameter t through the delay module; wherein t is greater than one time unit; and carrying out inversion processing on the X through the inverter to obtain the Y; and transmitting said Y according to said t through said second transmit antenna.
Further, in the embodiment of the present application, the first transmitting antenna and the second transmitting antenna set the same interference parameter a, where a is a natural number greater than or equal to zero.
The receiving unit 12 is specifically configured to receive, through a receiving antenna, the target signal Q, the first interference signal aX corresponding to the first transmitting antenna, and the second interference signal aY corresponding to the second transmitting antenna according to the n +1 time units.
Further, in the embodiment of the present application, the receiving unit 12, specifically configured to receive, in a first time unit, the overall received signal P1 through the receiving antenna, includes: a first interfering signal aX1 received within the first time unit and a target signal Q1 received within the first time unit; and in a second time unit, the overall received signal P2 received by the receiving antenna includes: a first interfering signal aX2 received in the second time unit, a second interfering signal aY1 received in the second time unit, and a target signal Q2 received in the second time unit; and the overall received signal Pn received by the receiving antenna in the nth time unit includes: a first interfering signal aXn received in the nth time unit, a second interfering signal aY (n-1) received in the nth time unit, and a target signal Qn received in the nth time unit; and the overall received signal P (n +1) received by the receiving antenna in the (n +1) th time unit includes: a second interfering signal aYn received within the n +1 time unit and a target signal Q (n +1) received within the n +1 time unit.
Further, in the embodiment of the present application, the calculating unit 13 is configured to perform summation calculation on all n +1 overall received signals corresponding to all n +1 time units, so as to obtain the target signal of the n +1 time units equal to the overall received signal of the n +1 time units.
The adjusting unit 14 is configured to set, through the gain adjusting module, the interference parameter of the first transmitting antenna and the interference parameter of the second transmitting antenna, so as to ensure that the first transmitting antenna and the second transmitting antenna have the same interference parameter.
Fig. 5 is a schematic diagram of a composition structure of a terminal according to an embodiment of the present disclosure, as shown in fig. 5, the terminal 1 according to the embodiment of the present disclosure may further include a first transmitting antenna 15, a second transmitting antenna 16, a receiving antenna 17, an inverter 18, a delay module 19, a gain adjusting module 110, a processor 111, and a memory 112 storing executable instructions of the processor 111, and further, the terminal 1 may further include a communication interface 113, and a bus 114 for connecting the processor 111, the memory 112, and the communication interface 113.
In an embodiment of the present application, the Processor 111 may be at least one of an Application Specific Integrated Circuit (ASIC), a Digital Signal Processor (DSP), a Digital Signal Processing Device (DSPD), a ProgRAMmable logic Device (P L D), a Field ProgRAMmable Gate Array (FPGA), a Central Processing Unit (CPU), a controller, a microcontroller, and a microprocessor, it is understood that, for different devices, electronic devices for implementing the Processor function may be other devices, and the present application is not limited thereto, the terminal 1 may further include a memory 112, and the memory 112 may be connected to the Processor 111, wherein the memory 112 is used for storing executable program codes including computer operation instructions, and the memory 112 may include a high speed memory, and may further include at least two non-volatile memories, such as a non-volatile memory, and a non-volatile memory, such as a disk RAM.
In the embodiment of the present application, the bus 114 is used to connect the communication interface 113, the processor 111, and the memory 112 and the intercommunication among these devices.
In an embodiment of the present application, the memory 112 is used for storing instructions and data.
Further, in the embodiment of the present application, the processor 111 is configured to transmit the first signal X in n time units through the first transmitting antenna; wherein n is an integer greater than 1; controlling a second transmitting antenna to transmit a second signal Y according to the n time units through the phase inverter and the time delay module; wherein X and Y are the same in size and opposite in phase; and receiving the overall received signal P according to the n +1 time units through the receiving antenna.
In practical applications, the Memory 112 may be a volatile first Memory (volatile Memory), such as a Random-Access Memory (RAM); or a non-volatile first Memory (non-volatile Memory), such as a Read-Only first Memory (ROM), a flash Memory (flash Memory), a Hard Disk (Hard Disk Drive, HDD) or a Solid-State Drive (SSD); or a combination of first memories of the above kind and provides instructions and data to the processor 111.
In addition, each functional module in this embodiment may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware or a form of a software functional module.
Based on the understanding that the technical solution of the present embodiment essentially or a part contributing to the prior art, or all or part of the technical solution, may be embodied in the form of a software product stored in a storage medium, and include several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) to execute all or part of the steps of the method of the present embodiment. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
The terminal provided by the embodiment of the application is provided with two transmitting antennas, wherein the terminal is also provided with a phase inverter and a delay module, and the terminal transmits a first signal X according to n time units through a first transmitting antenna; wherein n is an integer greater than 1; controlling a second transmitting antenna to transmit a second signal Y according to n time units through a phase inverter and a delay module; wherein X and Y are the same in size and opposite in phase; the overall received signal P is received by the receiving antenna in n +1 time units. Therefore, according to the self-interference elimination method provided by the application, the terminal is provided with the different transmitting antennas, the different time delay modules and the different phase inverters, and in n time units, the self-interference caused by the first transmitting antenna and the second transmitting antenna to the receiving antenna can be offset, so that the whole receiving signal received by the receiving antenna is the target signal without the self-interference, the self-interference of the full-duplex system is effectively eliminated, and the superiority of the full-duplex system is greatly improved.
An embodiment of the present application provides a computer-readable storage medium, on which a program is stored, and the program, when executed by a processor, implements the self-interference cancellation method as described above.
Specifically, the program instructions corresponding to a self-interference cancellation method in this embodiment may be stored on a storage medium such as an optical disc, a hard disc, a U-disc, etc., and when the program instructions corresponding to a self-interference cancellation method in the storage medium are read or executed by an electronic device, the method includes the following steps:
transmitting a first signal X by a first transmitting antenna in n time units; wherein n is an integer greater than 1;
controlling a second transmitting antenna to transmit a second signal Y according to the n time units through the phase inverter and the time delay module; wherein X and Y are the same in size and opposite in phase;
and receiving the overall received signal P according to the n +1 time units through the receiving antenna.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of a hardware embodiment, a software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of implementations of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart block or blocks and/or flowchart block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks in the flowchart and/or block diagram block or blocks.
The above description is only a preferred embodiment of the present application, and is not intended to limit the scope of the present application.
Claims (11)
1. A self-interference cancellation method applied to a terminal configured with two transmit antennas, wherein the terminal is further configured with an inverter and a delay module, the method comprising:
transmitting a first signal X by a first transmitting antenna in n time units; wherein n is an integer greater than 1;
controlling a second transmitting antenna to transmit a second signal Y according to the n time units through the phase inverter and the time delay module; wherein X and Y are the same in size and opposite in phase; the delay module is used for indicating the second transmitting antenna to carry out delay transmission of more than one time unit;
receiving the overall received signal P by the receiving antenna according to n +1 time units; wherein the content of the first and second substances,
the first transmitting antenna and the second transmitting antenna are provided with the same interference parameter a, wherein a is a natural number which is more than or equal to zero; the receiving the overall received signal P by the receiving antenna according to the n +1 time units includes:
receiving, by a receiving antenna, a target signal Q, a first interference signal aX transmitted by the first transmitting antenna in the n time units, and a second interference signal aY transmitted by the second transmitting antenna in the n time units according to the n +1 time units.
2. The method of claim 1, wherein said controlling a second transmitting antenna to transmit a second signal Y in said n time units via said inverter and said delay module comprises:
obtaining a delay parameter t through the delay module; wherein t is greater than one time unit;
carrying out inversion processing on the X through the inverter to obtain the Y;
and transmitting the Y according to the t through the second transmitting antenna.
3. The method of claim 1,
in the first time unit, the overall received signal P1 received by the receiving antenna includes: a first interfering signal aX1 received in the first time unit and a target signal Q1 received in the first time unit;
in the second time unit, the overall received signal P2 received by the receiving antenna includes: a first interference signal aX2 received in the second time unit, a second interference signal aY1 received in the second time unit, and a target signal Q2 received in the second time unit;
in the nth time unit, the overall received signal Pn received by the receiving antenna includes: a first interference signal aXn received in the nth time unit, a second interference signal aY (n-1) received in the nth time unit, and a target signal Qn received in the nth time unit;
in the (n +1) th time unit, the overall received signal P (n +1) received by the receiving antenna includes: a second interference signal aYn received in the (n +1) th time unit and a target signal Q (n +1) received in the (n +1) th time unit.
4. The method of claim 3,
and performing summation calculation on all n +1 overall received signals corresponding to all n +1 time units to obtain the target signal of the n +1 time units which is equal to the overall received signal of the n +1 time units.
5. The method of claim 1, wherein the terminal is further configured with a gain adjustment module, and wherein the method further comprises:
and setting the interference parameters of the first transmitting antenna and the interference parameters of the second transmitting antenna through the gain adjusting module so as to ensure that the first transmitting antenna and the second transmitting antenna have the same interference parameters.
6. A terminal, characterized in that the terminal comprises: a transmitting unit and a receiving unit, wherein the terminal is provided with two transmitting antennas, the terminal is also provided with an inverter and a time delay module,
the transmitting unit is used for transmitting a first signal X according to n time units through a first transmitting antenna; wherein n is an integer greater than 1; controlling a second transmitting antenna to transmit a second signal Y according to the n time units through the phase inverter and the time delay module; wherein X and Y are the same in size and opposite in phase; the delay module is used for indicating the second transmitting antenna to carry out delay transmission of more than one time unit;
the receiving unit is used for receiving the whole received signal P according to n +1 time units through a receiving antenna; wherein the content of the first and second substances,
the first transmitting antenna and the second transmitting antenna are provided with the same interference parameter a, wherein a is a natural number which is more than or equal to zero,
the receiving unit is specifically configured to receive, through a receiving antenna, a target signal Q according to the n +1 time units, a first interference signal aX transmitted by the first transmitting antenna in the n time units, and a second interference signal aY transmitted by the second transmitting antenna in the n time units.
7. The terminal of claim 6,
the transmitting unit is specifically configured to obtain a delay parameter t through the delay module; wherein t is greater than one time unit; and carrying out inversion processing on the X through the inverter to obtain the Y; and transmitting said Y according to said t through said second transmit antenna.
8. The terminal of claim 6,
the receiving unit is specifically configured to receive, in a first time unit, an overall received signal P1 through the receiving antenna, where the overall received signal P1 includes: a first interfering signal aX1 received in the first time unit and a target signal Q1 received in the first time unit; and in a second time unit, the overall received signal P2 received by the receiving antenna includes: a first interference signal aX2 received in the second time unit, a second interference signal aY1 received in the second time unit, and a target signal Q2 received in the second time unit; and the overall received signal Pn received by the receiving antenna in the nth time unit includes: a first interference signal aXn received in the nth time unit, a second interference signal aY (n-1) received in the nth time unit, and a target signal Qn received in the nth time unit; and the overall received signal P (n +1) received by the receiving antenna in the (n +1) th time unit includes: a second interference signal aYn received in the (n +1) th time unit and a target signal Q (n +1) received in the (n +1) th time unit.
9. The terminal of claim 8, wherein the terminal further comprises a computing unit and an adjusting unit, wherein the terminal is further configured with a gain adjusting module,
the calculating unit is configured to perform summation calculation on all n +1 overall received signals corresponding to all n +1 time units, so as to obtain the overall received signal of which the target signal of the n +1 time units is equal to the n +1 time units;
the adjusting unit is configured to set, through the gain adjusting module, the interference parameter of the first transmitting antenna and the interference parameter of the second transmitting antenna, so as to ensure that the first transmitting antenna and the second transmitting antenna have the same interference parameter.
10. A terminal, characterized in that the terminal comprises a processor, a memory storing a computer program executable by the processor, the program, when executed, implementing the method according to any of claims 1-5.
11. A computer-readable storage medium, on which a program is stored, for use in a terminal, characterized in that the program, when executed by a processor, implements the method according to any one of claims 1-5.
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| CN105376184A (en) * | 2015-10-28 | 2016-03-02 | 西安电子科技大学 | 2D antenna cancellation method of narrowband full-duplex system |
| CN106357299A (en) * | 2016-08-30 | 2017-01-25 | 上海交通大学 | Radio frequency self-interference eliminating system applied to in-band full duplex system integrating MIMO (multi-input multi-output) |
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