WO2015089801A1 - 全双工天线以及移动终端 - Google Patents

全双工天线以及移动终端 Download PDF

Info

Publication number
WO2015089801A1
WO2015089801A1 PCT/CN2013/089991 CN2013089991W WO2015089801A1 WO 2015089801 A1 WO2015089801 A1 WO 2015089801A1 CN 2013089991 W CN2013089991 W CN 2013089991W WO 2015089801 A1 WO2015089801 A1 WO 2015089801A1
Authority
WO
WIPO (PCT)
Prior art keywords
antenna
transmit
signal
full
transmitting
Prior art date
Application number
PCT/CN2013/089991
Other languages
English (en)
French (fr)
Inventor
张军平
杨智策
张黔
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to RU2016104782A priority Critical patent/RU2628015C1/ru
Priority to CN201380081580.5A priority patent/CN105814869B/zh
Priority to EP13899394.4A priority patent/EP2999196B1/en
Priority to PCT/CN2013/089991 priority patent/WO2015089801A1/zh
Priority to JP2016543291A priority patent/JP6260048B2/ja
Priority to BR112016003045-1A priority patent/BR112016003045B1/pt
Priority to CA2916030A priority patent/CA2916030C/en
Priority to KR1020167000887A priority patent/KR101725532B1/ko
Publication of WO2015089801A1 publication Critical patent/WO2015089801A1/zh
Priority to US15/135,830 priority patent/US10003123B2/en

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/27—Adaptation for use in or on movable bodies
    • H01Q1/28—Adaptation for use in or on aircraft, missiles, satellites, or balloons
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
    • H01Q1/521—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas
    • H01Q1/525—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas between emitting and receiving antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/28—Combinations of substantially independent non-interacting antenna units or systems
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
    • H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
    • 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
    • H04L5/14—Two-way operation using the same type of signal, i.e. duplex
    • 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
    • H04L5/14—Two-way operation using the same type of signal, i.e. duplex
    • H04L5/1461—Suppression of signals in the return path, i.e. bidirectional control circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers

Definitions

  • Wireless full duplex refers to a technology in which a wireless transceiver realizes simultaneous transmission and reception.
  • a wireless transceiver realizes simultaneous transmission and reception.
  • two separate channels need to be used for transmission and reception, or a time division system is needed to separate the received and transmitted time slots.
  • Both types of technologies lack effective use of the wireless spectrum. In the case of the same occupied bandwidth, the two types of full-duplex technology do not substantially improve the transmission efficiency of the entire communication system.
  • the biggest problem of achieving full duplex at the same time and on the same frequency is that when the transmitting antennas of both parties send signals to the receiving antenna of the other party at the same time, the transmitted signal will not only be received by the receiving antenna of the other party, but also by its own Received by the receiving antenna. Moreover, since the distance of its own receiving antenna to its own transmitting antenna is much closer than the distance of its own receiving antenna to the transmitting antenna of the other party, and the signal will fade during transmission, its own receiving antenna receives its own The signal transmitted by the transmitting antenna is far stronger than the signal transmitted by the receiving antenna of the receiving antenna, which causes the signal transmitted by the transmitting antenna of the other party to be overwhelmed.
  • the full duplex antenna includes: a first transmit antenna 111, a receive antenna 113, and a second transmit antenna 115.
  • the first transmit antenna 111, the receive antenna 113, and the second transmit antenna 115 are all omnidirectional antennas.
  • the first transmitting antenna 111 is disposed on one side of the receiving antenna 113, and the second transmitting antenna 115 is disposed on the other side of the receiving antenna 113.
  • the distance between the first transmitting antenna 111 and the receiving antenna 113 is that the distance between the second transmitting antenna 115 and the receiving antenna 113 is +, where ⁇ is the wavelength.
  • a full-duplex antenna provided by the prior art is applied in the first communication party 210 and the second communication party 220.
  • the first communication antenna 210, the first receiving antenna 213, and the second transmitting antenna 215 are disposed in the first communication side 210.
  • the third communication antenna 220 is provided with a third transmitting antenna 221, a second receiving antenna 223 and a fourth transmitting antenna 225.
  • the first correspondent party 210 needs to transmit data to the second correspondent party 220, so the first transmit antenna 211 and the second transmit antenna 215 simultaneously transmit the same signal outward. Moreover, the signals transmitted by the first transmitting antenna 211 and the second transmitting antenna 215 are simultaneously transmitted to the first receiving antenna 213 and the second receiving antenna 223.
  • the first receiving antenna 213 does not want to receive the signals transmitted by the first transmitting antenna 211 and the second transmitting antenna 215, and the distance between the first receiving antenna 213 and the first transmitting antenna 211 and the second transmitting antenna 215 is Farther than the distance between the second receiving antenna 223 and the first transmitting antenna 211 and the second transmitting antenna 215, the signals transmitted by the first transmitting antenna 211 and the second transmitting antenna 215 are received by the first receiving antenna 213. , will cause strong interference to the first receiving antenna 213.
  • the distance between the first transmitting antenna 211 and the first receiving antenna 213 is d
  • the distance between the second transmitting antenna 215 and the first receiving antenna 213 is + ⁇ / 2 , that is, the distance between the two is one-half the wavelength Therefore, the signal transmitted by the first transmitting antenna 211 to the first receiving antenna 213 is exactly the same as the signal transmitted by the second transmitting antenna 215 to the first receiving antenna 213, and the direction is inverted to form a cancellation. Therefore, the signals transmitted by the first transmitting antenna 211 and the second transmitting antenna 215 do not cause strong interference to the first receiving antenna 213.
  • the signals transmitted by the first transmitting antenna 211 and the second transmitting antenna 215 are transmitted and refracted multiple times in spatial transmission, and a plurality of paths (multipath effects) are formed and transmitted to the second receiving antenna 223, and the second receiving antenna 223 Received.
  • the second communication party 220 needs to transmit data to the first communication party 210, so the third transmitting antenna 221 and the fourth transmitting antenna 225 simultaneously transmit the same signal outward. Moreover, the signals transmitted by the third transmitting antenna 221 and the fourth transmitting antenna 225 are simultaneously transmitted to the second receiving antenna 223 and the first receiving antenna 213.
  • the second receiving antenna 223 does not want to receive the signals transmitted by the third transmitting antenna 221 and the fourth transmitting antenna 225, and the distance between the second receiving antenna 223 and the third transmitting antenna 221 and the fourth transmitting antenna 225 is Farther than the distance between the first receiving antenna 213 and the third transmitting antenna 221 and the fourth transmitting antenna 225, the signals transmitted by the third transmitting antenna 221 and the fourth transmitting antenna 225 are received by the second receiving antenna 223. , the second receiving antenna 223 will be strongly interfered.
  • the distance between the third transmitting antenna 221 and the second receiving antenna 223 is d, the distance between the fourth transmitting antenna 225 and the second receiving antenna 223 is + ⁇ / 2, so the third transmitting antenna 221 is sent to the second receiving.
  • the signal of the antenna 223 is just like the signal strength sent by the fourth transmitting antenna 225 to the second receiving antenna 223.
  • the direction is reversed to form a cancellation. Therefore, the signals transmitted by the third transmitting antenna 221 and the fourth transmitting antenna 225 do not cause strong interference to the second receiving antenna 223.
  • the signals transmitted by the third transmitting antenna 221 and the fourth transmitting antenna 225 are transmitted and refracted multiple times in spatial transmission, and a plurality of paths (multipath effects) are formed and transmitted to the first receiving antenna 213, and the first receiving antenna 213 is used. Received.
  • the first transmitting antenna 211 and the second transmitting antenna 213 of the first communicating party 210 do not affect the first receiving antenna 213, the third transmitting antenna 221 and the fourth transmitting antenna 225 of the second communicating party 220 are not The second receiving antenna 223 is affected. Therefore, data transmission between the first communication party 210 and the second communication party 220 can be performed bidirectionally at the same time and on the same frequency.
  • the broadband signal includes a plurality of frequency points, and the wavelengths corresponding to the respective frequency points are different. The distance between the second transmitting antenna 115 and the receiving antenna 113 can only be set according to one of the wavelengths. Therefore, the broadband signal is not The law is applied.
  • the present application provides a full-duplex antenna and a mobile terminal.
  • the distance between the antennas does not need to be reset, and the broadband signal can also be used.
  • the first aspect of the present application provides a full-duplex antenna, including: a receiving antenna; a first transmitting antenna disposed on one side of the receiving antenna, the first transmitting antenna being a directional antenna, and the first transmitting a reverse direction of the main lobe of the radiation pattern of the antenna is directed to the receiving antenna; a second transmitting antenna is disposed on the other side of the receiving antenna, and a distance from the second transmitting antenna to the receiving antenna is equal to a distance from the first transmit antenna to the receive antenna, the second transmit antenna is a directional antenna, and a reverse direction of a main lobe of a radiation pattern of the second transmit antenna is directed to the receive antenna.
  • the receiving antenna receives a polarization direction of a signal transmitted by the first transmitting antenna and the receiving antenna receives the second emission
  • the polarization directions of the signals emitted by the antennas are perpendicular to each other.
  • the full duplex antenna further includes: a signal generator, wherein the first output end of the signal generator is connected by the first wire a first transmitting antenna, the second output end of the signal generator is connected to the second transmitting antenna by a second wire, and the signal generator is configured to generate two transmitting signals with the same amplitude and opposite phases, and transmitting the two signals Signals are sent to the first transmit antenna and the second transmit antenna, respectively.
  • the first wire and the second wire are equal in length.
  • the full duplex antenna further includes: a digital interference canceller, where the digital interference canceller is configured to receive a received signal received from a receiving antenna, the digital noise canceller for canceling an interference signal received by the receiving antenna from the first transmitting antenna and the second transmitting antenna.
  • the fifth possible implementation manner of the first aspect of the present application includes multiple groups of transceiver channels, each group of transceiver channels including a receiving antenna, a first transmitting antenna, and a second transmitting An antenna and a signal generator, the first end of the digital interference canceller is configured to receive a received signal output by each group of receiving antennas, and the second end of the digital interference canceller is configured to output to each group of signal generators
  • the signal is transmitted, and the distance between the first transmitting antenna and the second transmitting antenna in the same group of transmitting and receiving paths to any one of the receiving antennas is the same.
  • the sixth possible implementation manner of the first aspect of the present application includes an analog-to-digital converter, the analog-to-digital converter is connected to the receiving antenna at one end, and the other end is connected
  • the digital interference canceller is configured to convert an analog received signal received by the receiving antenna into a digital received signal and send the received signal to the digital interference canceller.
  • the sixth possible implementation manner of the first aspect of the present application includes a digital-to-analog converter, one end of the digital-to-analog converter is connected to the signal generator, and the other end is And connecting the digital interference canceller, the digital-to-analog converter is configured to convert the digital transmit signal sent by the digital interference canceller into an analog transmit signal, and send the signal to the signal generator.
  • the radiation pattern of a transmitting antenna and the second transmitting antenna has no side lobes.
  • the omnidirectional direction can be formed. Radiation, wherein the omnidirectional radiation enables the transmit signal to be received in any one of a 360 degree direction.
  • a second aspect of the present application provides a mobile terminal, including a full-duplex antenna, wherein the full-duplex antenna is a full-duplex antenna of any of the above.
  • two-way communication can be implemented in the same time slot and the same frequency, and the first transmitting antenna and the second transmitting antenna are respectively disposed on both sides of the receiving antenna, and both the first transmitting antenna and the second transmitting antenna are The directional antenna, the opposite direction of the main lobe of the radiation pattern of the two points to the receiving antenna to increase the interference cancellation, and the distance from the original second transmitting antenna to the receiving antenna must be different from the distance between the first transmitting antenna and the receiving antenna by two-thirds.
  • the method of increasing the interference cancellation by one wavelength it is not limited by the wavelength, and the distance between the antennas does not need to be reset even when the frequency of use is changed.
  • FIG. 1 is a schematic structural view of an embodiment of a prior art full-duplex antenna
  • FIG. 2 is a schematic diagram of bidirectional transmission of a prior art full duplex antenna
  • FIG. 3 is a schematic structural diagram of an embodiment of a full-duplex antenna of the present application.
  • FIG. 4 is a schematic structural diagram of another embodiment of a full-duplex antenna of the present application.
  • FIG. 5 is a radiation pattern of a full-duplex antenna transmitting antenna with side lobes of the present application
  • FIG. 6 is a radiation pattern of a full-duplex antenna transmitting antenna of the present application without side lobes
  • FIG. 7 is a full-duplex antenna of the present application.
  • FIG. 8 is a schematic structural diagram of still another embodiment of a full-duplex antenna of the present application.
  • FIG. 3 is a schematic structural diagram of an embodiment of a full-duplex antenna of the present application.
  • the full-duplex antenna of the present application includes a receiving antenna 310, a first transmitting antenna 320, and a second transmitting antenna 330.
  • the receiving antenna 310 is for receiving a signal transmitted by the other party.
  • the first transmitting antenna 320 is disposed on one side of the receiving antenna 310, the first transmitting antenna 310 is a directional antenna, and the reverse direction of the main lobe of the radiation pattern of the first transmitting antenna 310 is directed to the receiving antenna 310.
  • the second transmit antenna 320 is disposed on the other side of the receive antenna 310, and the distance from the second transmit antenna 320 to the receive antenna 310 is equal to the distance from the first transmit antenna 320 to the receive antenna 310, and the second transmit antenna 320 is a directional antenna. Moreover, the opposite direction of the main lobe of the radiation pattern of the second transmitting antenna 320 is directed to the receiving antenna 310. It can be understood that the distance between the second transmitting antenna 320 and the receiving antenna 310 is equal to the distance between the first transmitting antenna 320 and the receiving antenna 310, and cannot be understood as an absolute "equal" in the mathematical sense, but in a certain engineering. "equal" is also allowed within the error range.
  • the first transmitting antenna and the second transmitting antenna are respectively disposed on both sides of the receiving antenna, and the first transmitting antenna and the second transmitting antenna are both directional antennas, and the main lobe of the radiation pattern of the two is The opposite direction points to the receiving antenna to increase the interference cancellation.
  • the distance must be one-half of the distance from the first transmitting antenna to the receiving antenna to increase the interference cancellation method. Due to the wavelength limitation, the distance between the antennas does not need to be reset even when the frequency of use changes. Moreover, it is also possible to use a broadband signal.
  • the signal transmitted by the transmitting antenna of the other party can be identified, it is necessary to eliminate the signal transmitted by its own transmitting antenna and received by its own receiving antenna to white noise.
  • the distance between the first transmitting antenna 111, the second transmitting antenna 115 and the receiving antenna 113 It needs to be set far away, and it is not suitable for relatively small devices such as mobile communication devices.
  • FIG. 4 is a schematic structural diagram of another embodiment of a full-duplex antenna of the present application.
  • the full-duplex antenna of the present application can be applied to a small device, including: a receiving antenna 310, a first transmitting antenna 320, a second transmitting antenna 330, a signal generator 340, an analog-to-digital converter 350, a digital-to-analog converter 360, and digital interference.
  • Eliminator 370 The first transmitting antenna 320 is disposed on one side of the receiving antenna 310, and the second transmitting antenna 330 is disposed on the other side of the receiving antenna 310.
  • the distance from the first transmit antenna 320 to the receive antenna 320 is equal to the distance from the second transmit antenna 330 to the receive antenna 310.
  • the distance between the second transmitting antenna 320 and the receiving antenna 310 is equal to the distance between the first transmitting antenna 320 and the receiving antenna 310, and cannot be understood as an absolute “equal” in the mathematical sense, but rather in a certain engineering. “equal” is also allowed within the error range.
  • the first output of signal generator 340 is coupled to first transmit antenna 320 via a first conductor, and the second output of signal generator 340 is coupled to second transmit antenna 330 via a second conductor.
  • the analog to digital converter 350 has one end connected to the receiving antenna 310 and the other end connected to the first end of the digital interference canceller 370.
  • One end of the digital to analog converter 360 is coupled to the input of the signal generator 340, and the other end of the digital to analog converter 360 is coupled to the second end of the digital interference canceller 370.
  • the lengths of the first wire and the second wire are equal to ensure that the signals output by the signal generator 340 to the first transmitting antenna 320 and the second transmitting antenna 330 remain the same amplitude and opposite in phase. It can be understood that the lengths of the first wire and the second wire are equal here, and cannot be understood as an absolute “equal” in the mathematical sense, but can be allowed to be "equal” within a certain engineering error range.
  • the receiving antenna 310 may be a directional antenna or an omnidirectional antenna.
  • the directional antenna primarily transmits or receives signals in the direction in which the lobes of the radiation pattern are directed.
  • An omnidirectional antenna is capable of receiving signals transmitted from all directions. Since the signal from the transmitting antenna of the other party will form a multipath effect in the transmission space, and when the other party or itself can move (for example, when the antenna is disposed in the mobile terminal), it may move to any angle, and the omnidirectional antenna The signal transmitted from all directions can be received, so the receiving antenna 310 is preferably an omnidirectional antenna.
  • FIG. 5 is a radiation pattern of a full-duplex antenna transmitting antenna with side lobes of the present application.
  • 6 is a radiation pattern of a full-duplex antenna transmitting antenna of the present application without side lobes.
  • the first transmit antenna 320 is a directional antenna. Therefore, the first transmit antenna 320 is disposed on one side of the receive antenna 310, and the reverse direction of the main lobe 410 of the radiation pattern of the first transmit antenna 320 is directed to the receive antenna 310.
  • the directional antenna is mainly directed to the lobes of the radiation pattern
  • the signal is transmitted or received in the direction, so that the opposite direction of the main lobe 410 of the radiation pattern of the first transmit antenna 320 is directed to the receive antenna 310 to reduce interference of the first transmit antenna 320 with the receive antenna 310.
  • the side lobes 420 cause some interference to the receiving antenna 310, the radiation pattern without side lobes as shown in Fig. 6 is preferably used.
  • the second transmit antenna 330 is also a directional antenna. Similarly, the second transmitting antenna 330 is disposed on the other side of the receiving antenna 310, and the reverse direction of the main lobe of the radiation pattern of the second transmitting antenna 330 is directed to the receiving antenna 310, because the directional antenna mainly faces the radiation pattern. The direction in which the leaf lobes are directed to transmit or receive signals, so that the opposite direction of the main lobes of the radiation pattern of the second transmit antenna 330 is directed to the receive antenna 310 to reduce interference of the second transmit antenna 330 with the receive antenna 310.
  • the side lobes 420 cause some interference to the receiving antenna 310, it is preferred to use a radiation pattern with fewer side lobes and a small radiation pattern, preferably using a radiation pattern without side lobes as shown in FIG.
  • the opposite direction of the main lobe of the radiation pattern of the first transmitting antenna and the second transmitting antenna points to the receiving antenna, which can form interference cancellation of 10 ⁇ 25dB.
  • omnidirectional radiation can be formed to ensure that the receiving antenna of the other party can receive the transmitted signal in any one of the 360-degree directions.
  • the receiving antenna 310 receives the polarization direction of the signal transmitted by the first transmitting antenna 320 and the polarization direction of the signal transmitted by the receiving antenna 310 receiving the second transmitting antenna 330, forming a 10 dB interference cancellation. Since the vibration of the electromagnetic wave is directional, there is little energy after the polarization directions are perpendicular to each other, causing the receiving antenna 310 to resonate, so that the energy received by the receiving antenna 310 is the smallest.
  • the signal generator 340 can be a balun converter for generating two transmit signals of the same amplitude and opposite phase, and transmitting the two transmit signals to the first transmit antenna 320 and the second transmit antenna 330, respectively. Since the distance from the first transmitting antenna 320 to the receiving antenna 310 is equal to the distance from the second transmitting antenna 330 to the receiving antenna 310, the signal sent by the first transmitting antenna 320 and the signal sent by the second transmitting antenna 330 are at the receiving antenna 310. The phase at the end is just inverted, forming a cancellation. The signals emitted by the first transmit antenna 320 and the second transmit antenna 330 produce 30 dB of interference cancellation at the receive antenna 310.
  • the distance from the first transmitting antenna 320 to the receiving antenna 310 is not necessarily the same as the distance from the second transmitting antenna 330 to the receiving antenna 310, and the first transmission
  • the signal transmitted by the transmitting antenna 320 and the signal transmitted by the second transmitting antenna 330 may form a multipath effect in the transmission space, the phases when reaching the receiving antenna 310 are different, or the receiving side is positive in one of the transmitting antennas. In the direction, the strength of the received antenna is greater than the strength of the other transmit antenna. Therefore, the two transmit antennas transmit two transmit signals with the same amplitude and opposite phase, which will not affect the receiving antenna of the other party.
  • the analog to digital converter 350 is operative to convert the analog transmitted signal received by the receiving antenna 310 into a digital transmitted signal and to transmit it to the data interference canceller 370.
  • the digital to analog converter 360 receives the analog modulated signal transmitted by the data interference canceller 370 and converts the analog transmitted signal into a digital transmitted signal and transmits it to the signal generator 340.
  • the digital interference canceller 370 is for canceling the interference signals received by the receiving antenna from the first transmitting antenna 320 and the second transmitting antenna 330.
  • the above analog part adopts various methods to cancel the signals transmitted by the first transmitting antenna 320 and the second transmitting antenna 330, some signals are still transmitted as the interference signal together with the signal transmitted by the other party by the receiving antenna 310. receive. At this time, the interference signal can be cancelled by the digital interference canceller 350.
  • the digital interference canceller is capable of generating interference cancellation of 35dBm.
  • the digital interference canceller 370 can be implemented with a processor having a fast computing power such as a digital signal processor.
  • FIG. 7 is a schematic structural diagram of an implementation manner of a digital interference canceller in the full-duplex antenna of the present application.
  • the digital interference canceller 350 of the present embodiment includes a first delay module 351, a subtraction module 352, a channel estimation 353, a signal reconstruction module, and a second delay module 355.
  • the signal received by the receiving antenna 310 includes the signal transmitted by the transmitting antenna of the opposite party, and also includes the signal transmitted by the first transmitting antenna 320 and the second transmitting antenna 330.
  • the signal transmitted by the transmitting antenna of the opposite party is desired to be
  • the received signal is a useful signal
  • the signal transmitted by the first transmitting antenna 320 and the second transmitting antenna 330 is a signal that is not desired to be received, and is an interference signal.
  • the first transmitting antenna 320 and the second transmitting antenna 330 cannot be directly known. Interference signal. Therefore, to remove the interference signal from the first transmit antenna 320 and the second transmit antenna 330 from the signal received by the receive antenna 310, the channel estimate module 353 must first be used to estimate the channel to obtain a channel estimate, and then Utilizing signal reconstruction module 354 for channel estimation and for first transmit antenna 320 and second transmit The modulated signal transmitted by the antenna 330 reconstructs the interference signal received by the receiving antenna 310.
  • the subtraction module 352 is used to subtract the reconstructed interference signal from the signal received by the receiving antenna 310, thereby eliminating the interference signal.
  • the time it takes for the modulated signal to propagate in space and then be received by the receiving antenna 310 is different from the time it takes for the modulated signal to be transmitted in the digital interference canceller 350, so the first delay module 351 and The second delay module 355 performs a delay to ensure that the signal received by the receiving antenna 310 and the interference signal reconstructed by the signal reconstruction module 354 arrive at the subtraction module 352.
  • the first transmitting antenna and the second transmitting antenna as directional antennas, and the opposite directions of the main lobe of the radiation patterns of the two are directed to the receiving antenna, 10 ⁇ 25 dB interference cancellation is formed.
  • the polarization direction of the signal received by the receiving antenna to receive the first transmitting antenna is perpendicular to the polarization direction of the signal transmitted by the receiving antenna to the second transmitting antenna, and 10dB of interference cancellation is formed.
  • the signal generator generates two signals of the same amplitude and opposite phases, and is respectively sent through the first transmitting antenna and the second transmitting antenna, and the distance between the first transmitting antenna and the second transmitting antenna to the receiving antenna is equal, the first transmitting The signal from the antenna and the second transmit antenna produces 30 dB of interference cancellation at the receive antenna.
  • the digital interference canceller is capable of generating 35dB of interference cancellation. Therefore, a total of 105 to 110 dB of interference cancellation can be generated, so that bidirectional communication can be realized in the same time slot and at the same frequency.
  • the distance between the two transmitting antennas to the receiving antenna can be very close, and the added device signal generator and digital interference canceller are chip-level, so the size of the full-duplex antenna can be made very small. Thereby getting applications on miniaturized devices.
  • the distance between the first transmit antenna and the second transmit antenna to the receive antenna is equal, and the first transmit antenna and the second transmit antenna send two signals of the same amplitude and opposite phases, so that when the frequency changes, the antenna The distance does not need to be reset, and even a wideband signal can achieve a destructive effect, making the full-duplex antenna equally suitable for wideband signals.
  • FIG. 8 is a schematic structural diagram of still another embodiment of a full-duplex antenna of the present application.
  • the difference from the full-duplex antenna shown in FIG. 4 includes: a plurality of sets of transceiver channels, each group of transceiver channels including a receiving antenna 310, a first transmitting antenna 320, a second transmitting antenna 330, and a signal generator 340, each group The setting of the receiving antenna 310, the first transmitting antenna 320, the second transmitting antenna 330, and the signal generator 340 in the transmitting and receiving path (including the connection relationship, the radiation direction setting, the first transmitting antenna 320 and the second transmitting antenna 330 to the receiving antenna 310) Distance, first lead and second lead The distance of the line, etc.) are the same, and are not repeated here.
  • the first end of the digital interference canceller is configured to receive the received signals output by the receiving antennas of each group, and the second end of the digital interference canceller is configured to output the transmitting signals to the signal generators of the respective groups.
  • the distance between the first transmit antenna and the second transmit antenna in the same group of transmit and receive paths to any one of the receive antennas is the same, for example, the distance from the first transmit antenna 320 of the first group to the receive antenna 310 of the first group (d0) a distance (d0) equal to the second transmit antenna 330 of the first group to the receive antenna 310 of the first group; a distance U1 of the first transmit antenna 320 of the first group to the receive antenna 310 of the second group is equal to the first set The distance ( dl ) of the second transmit antenna 330 to the receive antennas 310 of the second group; the distance U2 of the first transmit antennas 320 to the third set of receive antennas 310 are equal to the second transmit antennas 330 of the first set The distance to the receiving antenna
  • the full-duplex antenna of the present application when the transmitting antenna sends a signal to the receiving antenna of the other party, the transmitted signal will only be received by the receiving antenna of the other party, but will not affect the receiving antenna of the other party, and receive
  • the antenna can receive data as usual, so full duplex can be realized at the same frequency and on the same time slot, which greatly improves the efficiency of spectrum utilization.
  • the distance between the two transmitting antennas to the receiving antenna can be very close, and the added device signal generator and digital interference canceller are chip-level, so the size of the full-duplex antenna can be made very small. Thereby getting applications on miniaturized devices.
  • the distance between the first transmit antenna and the second transmit antenna to the receive antenna is equal, and the first transmit antenna and the second transmit antenna send two signals of the same amplitude and opposite phases, so that when the frequency changes, the antenna The distance does not need to be reset, and even a wideband signal can achieve a destructive effect, making the full-duplex antenna equally suitable for wideband signals.
  • the present application further provides a mobile terminal, including the full-duplex antenna according to the above embodiment.
  • a mobile terminal including the full-duplex antenna according to the above embodiment.
  • the disclosed system, apparatus, and method may be implemented in other manners.
  • the device implementations described above are merely illustrative.
  • the division of the modules or units is only a logical function division.
  • there may be another division manner for example, multiple units or components may be used. Combined or can be integrated into another system, or some features can be ignored, or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be through some connections.
  • An indirect coupling or communication connection of a port, device or unit which may be in electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium.
  • the instructions include a plurality of instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to perform all or part of the steps of the methods described in various embodiments of the present application.
  • the foregoing storage medium includes: a U disk, a removable hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and the like, which can store program codes. .

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Remote Sensing (AREA)
  • Transceivers (AREA)
  • Details Of Aerials (AREA)
  • Radio Transmission System (AREA)

Abstract

本申请公开了一种全双工天线以及移动终端。所述全双工天线包括：接收天线为全向天线，第一发射天线设置于接收天线的一侧，为定向天线，并且，第一发射天线的辐射方向图的主叶瓣的反方向指向接收天线；第二发射天线设置于接收天线的另一侧，第二发射天线至接收天线的距离等于第一发射天线至接收天线的距离，为定向天线，第二发射天线的辐射方向图的主叶瓣的反方向指向接收天线。

Description

全双工天线以及移动终端
【技术领域】 本申请涉及通信领域， 特别是涉及一种全双工天线以及移动终端。 【背景技术】 无线全双工指的是无线收发机实现同时收发的技术。 在传统的无线网 收发机设计中， 为了实现全双工， 或者需要采用两个独立的信道分别进行 发送和接收， 或者需要采用时分系统将接收和发送的时隙分开。 这两类技 术都缺乏对无线频谱的有效利用， 在占用带宽相同的情况下， 两类全双工 技术并没有本质提升整个通信系统的传输效率。
在同一时间、 同一频率上实现全双工的最大问题在于， 当双方的发射 天线同时向对方的接收天线发送信号时， 所发送的信号不仅会被对方的接 收天线所接收， 也会被自身的接收天线所接收。 而且， 由于， 自身的接收 天线至自身的发射天线的距离远比自身的接收天线至对方的发射天线的距 离近， 而信号在传输过程中会有衰落， 所以， 自身的接收天线接收到自身 的发射天线所发送的信号远比自身的接收天线接收到对方的发射天线所发 送的信号强， 导致将对方的发射天线所发送的信号淹没了。
参阅图 1 , 为了提高无线频谱的利用率， 现有技术提供了一种全双工天 线， 能够在同一频率及同一时隙下进行双工传输， 而不影响其接收信号的 信噪比。 所述全双工天线包括： 第一发射天线 111 , 接收天线 113以及第二 发射天线 115。 其中， 第一发射天线 111 , 接收天线 113以及第二发射天线 115都是全向天线。 第一发射天线 111设置接收天线 113的一侧， 第二发射 天线 115设置于接收天线 113的另一侧。 而且， 第一发射天线 111与接收天 线 113的距离为 第二发射天线 115与接收天线 113的距离为 + 其 中， λ为波长。
参考图 2,在第一通信方 210以及第二通信方 220中应用现有技术提供 的全双工天线。 其中， 第一通信方 210中设置有第一发射天线 211 , 第一接 收天线 213以及第二发射天线 215。第二通信方 220中设置有第三发射天线 221 , 第二接收天线 223以及第四发射天线 225。
一方面， 第一通信方 210需要向第二通信方 220发送数据， 所以， 第 一发射天线 211和第二发射天线 215 同时向外发送相同的信号。 而且， 第 一发射天线 211和第二发射天线 215所发送的信号都同时向第一接收天线 213以及第二接收天线 223发送。但是， 第一接收天线 213并不希望接收到 第一发射天线 211 以及第二发射天线 215所发送的信号， 而且， 第一接收 天线 213与第一发射天线 211以及第二发射天线 215的距离要远比第二接 收天线 223与第一发射天线 211以及第二发射天线 215的距离要近， 所以， 第一发射天线 211 以及第二发射天线 215所发送的信号如果被第一接收天 线 213所接收， 将会对第一接收天线 213造成强烈的干扰。 但是， 由于第 一发射天线 211与第一接收天线 213的距离为 d ,第二发射天线 215与第一 接收天线 213的距离为 + λ / 2 , 即两者的距离相距二分之一的波长， 所以， 第一发射天线 211发送到第一接收天线 213的信号刚好与第二发射天线 215 发送到第一接收天线 213 的信号强度相同， 方向反相， 形成相消。 所以， 第一发射天线 211 以及第二发射天线 215所发送的信号不会对第一接收天 线 213造成强烈的干扰。 而第一发射天线 211 以及第二发射天线 215所发 送的信号在空间传输中经过多次发射、 折射， 形成多条路径 （多径效应） 传输到第二接收天线 223 , 被第二接收天线 223所接收。
另一方面， 第二通信方 220需要向第一通信方 210发送数据， 所以， 第三发射天线 221和第四发射天线 225同时向外发送相同的信号。 而且， 第三发射天线 221和第四发射天线 225所发送的信号都同时向第二接收天 线 223以及第一接收天线 213发送。 但是， 第二接收天线 223并不希望接 收到第三发射天线 221和第四发射天线 225所发送的信号， 而且， 第二接 收天线 223与第三发射天线 221和第四发射天线 225的距离要远比第一接 收天线 213与第三发射天线 221和第四发射天线 225的距离要近， 所以， 第三发射天线 221和第四发射天线 225所发送的信号如果被第二接收天线 223所接收， 将会对第二接收天线 223造成强烈的干扰。 但是， 由于第三发 射天线 221与第二接收天线 223的距离为 d ,第四发射天线 225与第二接收 天线 223的距离为 + λ / 2 , 所以， 第三发射天线 221发送到第二接收天线 223的信号刚好与第四发射天线 225发送到第二接收天线 223的信号强度相 同， 方向反相， 形成相消。 所以， 第三发射天线 221以及第四发射天线 225 所发送的信号不会对第二接收天线 223造成强烈的干扰。 而第三发射天线 221以及第四发射天线 225所发送的信号在空间传输中经过多次发射、折射， 形成多条路径 (多径效应）传输到第一接收天线 213 , 被第一接收天线 213 所接收。
由于第一通信方 210的第一发射天线 211 以及第二发射天线 213不会 对第一接收天线 213造成影响， 而， 第二通信方 220的第三发射天线 221 以及第四发射天线 225也不会对第二接收天线 223造成影响。 所以， 第一 通信方 210和第二通信方 220之间可在同一时间和同一频率上双向进行数 据传输。
但是，在这种方式下，第一发射天线 111与接收天线 113的距离为 d时， 则第二发射天线 115与接收天线 113的距离必须为 + λ / 2。 所以， 当使用 的波长发生变化时， 第二发射天线 115 的距离就必须发生变化。 而且， 宽 频信号包括多个频率点， 每个频率点所对应的波长均不相同， 第二发射天 线 115与接收天线 113的距离却只能根据其中一个波长进行设置， 所以， 对于宽频信号就没法应用了。
【发明内容】 本申请提供一种全双工天线以及移动终端， 能够使用频率改变时， 天 线之间的距离不需重新设置， 而且， 对于宽频信号也能够使用。
本申请第一方面提供一种全双工天线， 包括： 接收天线； 第一发射天 线， 设置于所述接收天线的一侧， 所述第一发射天线为定向天线， 并且， 所述第一发射天线的辐射方向图的主叶瓣的反方向指向所述接收天线； 第 二发射天线， 设置于所述接收天线的另一侧， 并且， 所述第二发射天线至 所述接收天线的距离等于所述第一发射天线至所述接收天线的距离， 所述 第二发射天线为定向天线， 并且， 所述第二发射天线的辐射方向图的主叶 瓣的反方向指向所述接收天线。
结合第一方面， 本申请第一方面的第一种可能的实施方式中， 所述接 收天线接收所述第一发射天线所发射的信号的极化方向与所述接收天线接 收所述第二发射天线所发射的信号的极化方向互相垂直。 结合第一方面， 本申请第一方面的第二种可能的实施方式中， 所述全 双工天线还包括： 信号产生器， 所述信号产生器的第一输出端通过第一导 线连接所述第一发射天线， 所述信号产生器的第二输出端通过第二导线连 接所述第二发射天线， 所述信号产生器用于产生两路幅度相同并且相位相 反的发射信号， 并将两路发射信号分别发送给所述第一发射天线以及所述 第二发射天线。
结合第一方面的第二种可能的实施方式， 本申请第一方面的第三种可 能的实施方式中， 所述第一导线与所述第二导线的长度相等。
结合第一方面的第二种可能的实施方式， 本申请第一方面的第四种可 能的实施方式中， 所述全双工天线还包括： 数字干扰消除器， 所述数字干 扰消除器用于接收从接收天线接收到的接收信号， 信号产生器所述数字干 扰消除器用于消除所述接收天线接收到的， 来自所述第一发射天线以及第 二发射天线的干扰信号。
结合第一方面的第四种可能的实施方式， 本申请第一方面的第五种可 能的实施方式中， 包括多组收发通路， 每组收发通路包括接收天线、 第一 发射天线、 第二发射天线以及信号产生器， 所述数字干扰消除器的第一端 用于接收各组的接收天线所输出的接收信号， 所述数字干扰消除器的第二 端用于向各组的信号产生器输出发射信号， 并且， 同一组收发通路中的第 一发射天线和第二发射天线到任意一个接收天线的距离相同。
结合第一方面的第四种可能的实施方式， 本申请第一方面的第六种可 能的实施方式中， 包括模数转换器， 所述模数转换器一端连接所述接收天 线， 另一端连接所述数字干扰消除器， 所述模数转换器用于将接收天线所 接收到的模拟的接收信号转换为数字的接收信号， 并发送给所述数字干扰 消除器。
结合第一方面的第四种可能的实施方式， 本申请第一方面的第六种可 能的实施方式中， 包括数模转换器， 所述数模转换器一端连接所述信号产 生器， 另一端连接所述数字干扰消除器， 所述数模转换器用于将所述数字 干扰消除器所发送的数字的发射信号转换为模拟的发射信号， 并发送给所 述信号产生器。
结合第一方面， 本申请第一方面的第七种可能的实施方式中， 所述第 一发射天线以及所述第二发射天线的辐射方向图没有旁瓣。
结合第一方面， 本申请第一方面的第八种可能的实施方式中， 所述第 一发射天线的辐射主瓣方向和所述第二发射天线的辐射主瓣方向叠加后， 能够形成全方向辐射， 其中， 所述全方向辐射使得在 360度方向中的任意 一个方向都能接收所述发射信号。
本申请第二方面提供一种移动终端， 包括全双工天线， 所述全双工天 线为上述任一种的全双工天线。
上述方案， 能够在同一时隙以及同一频率实现双向通信， 而且通过设 置第一发射天线以及第二发射天线分别在接收天线的两侧， 而且， 第一发 射天线以及第二发射天线两者皆为定向天线， 两者的辐射方向图的主叶瓣 的反方向指向接收天线来增加干扰消除， 与原来第二发射天线到接收天线 的距离必须比第一发射天线到接收天线的距离相差二分之一波长才能增加 干扰消除的方法相比， 不会受到波长的限制， 即使使用频率改变时， 天线 之间的距离也不需重新设置。 而且， 对于宽频信号也同样可以使用。
【附图说明】 图 1是现有技术全双工天线一实施方式的结构示意图；
图 2是现有技术全双工天线的进行双向传输的示意图；
图 3是本申请全双工天线一实施方式的结构示意图；
图 4是本申请全双工天线另一实施方式的结构示意图；
图 5是本申请全双工天线发射天线采用有旁瓣的辐射方向图； 图 6是本申请全双工天线发射天线采用无旁瓣的辐射方向图； 图 7是本申请全双工天线中数字干扰消除器一实施方式的结构示意图； 图 8是本申请全双工天线中再一实施方式的结构示意图。
【具体实施方式】 以下描述中， 为了说明而不是为了限定， 提出了诸如特定系统结构、 接口、 技术之类的具体细节， 以便透彻理解本申请。 然而， 本领域的技术 在其它情况中， 省略对众所周知的装置、 电路以及方法的详细说明， 以免 不必要的细节妨碍本申请的描述。
参阅图 3 , 图 3是本申请全双工天线一实施方式的结构示意图。 本申请 全双工天线包括：接收天线 310、第一发射天线 320以及第二发射天线 330。
接收天线 310用于接收对方所发送的信号。
第一发射天线 320,设置于接收天线 310的一侧， 第一发射天线 310为 定向天线， 并且， 第一发射天线 310 的辐射方向图的主叶瓣的反方向指向 接收天线 310。
第二发射天线 320设置于接收天线 310的另一侧， 并且， 第二发射天 线 320至接收天线 310的距离等于第一发射天线 320至接收天线 310的距 离， 第二发射天线 320为定向天线， 并且， 第二发射天线 320的辐射方向 图的主叶瓣的反方向指向接收天线 310。可以理解的是， 这里第二发射天线 320至接收天线 310的距离等于第一发射天线 320至接收天线 310的距离， 并不能理解为数学意义上的绝对的 "等于"， 而是， 在一定工程误差范围内 也能允许的 "等于"。
上述方案， 通过设置第一发射天线以及第二发射天线分别在接收天线 的两侧， 而且， 第一发射天线以及第二发射天线两者皆为定向天线， 两者 的辐射方向图的主叶瓣的反方向指向接收天线来增加干扰消除， 与原来第 二发射天线到接收天线的距离必须比第一发射天线到接收天线的距离相差 二分之一波长才能增加干扰消除的方法相比， 不会受到波长的限制， 即使 使用频率改变时， 天线之间的距离也不需重新设置。 而且， 对于宽频信号 也同样可以使用。
本领域的技术人员在长期研发中还发现， 如果要使得对方的发射天线 所发送的信号能被识别， 则需要将自身的发射天线所发出并被自身的接收 天线所接收的信号消除至白噪声的功率水平， 而自身的发射天线所发出的 信号的功率水平为 15~20dBm, 白噪声的功率水平为 -90dBm, 所以， 至少 需要在接收天线将自身的发射天线所发出的信号衰减 15dBm- ( -90dBm ) =105dB。 采用图 1所示的天线， 为了减少第一发射天线 111与第二发射天 线 115对接收天线 113的影响， 必须距离 20厘米以上， 才能提供足够的传 输衰减。 所以， 第一发射天线 111、 第二发射天线 115与接收天线 113的距 离需要设置得比较远， 不适用于移动通信设备等比较小巧的设备中。
参阅图 4, 图 4是本申请全双工天线另一实施方式的结构示意图。 本申 请全双工天线能应用于小型设备中， 包括： 接收天线 310、 第一发射天线 320、 第二发射天线 330、 信号产生器 340、 模数转换器 350、 数模转换器 360以及数字干扰消除器 370。其中，第一发射天线 320设置于接收天线 310 的一侧， 第二发射天线 330设置于接收天线 310的另一侧。 第一发射天线 320至接收天线 320的距离等于第二发射天线 330至接收天线 310的距离。 可以理解的是， 这里第二发射天线 320至接收天线 310的距离等于第一发 射天线 320至接收天线 310的距离，并不能理解为数学意义上的绝对的 "等 于"， 而是， 在一定工程误差范围内也能允许的 "等于"。 信号产生器 340 的第一输出端通过第一导线连接第一发射天线 320,信号产生器 340的第二 输出端通过第二导线连接第二发射天线 330。模数转换器 350的一端连接接 收天线 310, 另一端连接数字干扰消除器 370的第一端。数模转换器 360的 一端连接信号产生器 340的输入端， 数模转换器 360的另一端连接数字干 扰消除器 370 的第二端。 优选地， 第一导线与第二导线的长度相等以确保 信号产生器 340输出至第一发射天线 320以及第二发射天线 330的信号依 然保持幅度相同、 相位相反。 可以理解的是， 这里第一导线与第二导线的 长度相等， 并不能理解为数学意义上的绝对的 "相等"， 而是， 在一定工程 误差范围内也能允许的 "相等"。
接收天线 310 可以为定向天线， 也可以为全向天线。 定向天线主要向 辐射方向图的叶瓣所指向的方向发送或接收信号。 全向天线能够接收从四 面八方发送而来的信号。 由于对方的发射天线所发出的信号会在传输空间 中形成多径效应， 而且， 对方或自身可移动时 （例如， 天线设置在移动终 端内时）， 可能移动到任意一个角度， 而全向天线能够接收从四面八方发送 而来的信号， 所以， 接收天线 310优选为全向天线。
请一并参阅图 5以及图 6, 图 5是本申请全双工天线发射天线采用有旁瓣 的辐射方向图。 图 6是本申请全双工天线发射天线采用无旁瓣的辐射方向 图。 第一发射天线 320为定向天线， 所以， 将第一发射天线 320设置于接收 天线 310的一侧， 并且， 使得第一发射天线 320的辐射方向图的主叶瓣 410的 反方向指向接收天线 310, 由于定向天线主要向辐射方向图的叶瓣所指向的 方向发送或接收信号，所以，令第一发射天线 320的辐射方向图的主叶瓣 410 的反方向指向接收天线 310能够减少第一发射天线 320对接收天线 310的干 扰。 而且， 由于旁瓣 420会对接收天线 310造成一定的干扰， 所以， 优先采 用如图 6所示的没有旁瓣的辐射方向图。
第二发射天线 330同样为定向天线。 同理， 将第二发射天线 330设置 于接收天线 310的另一侧， 并且， 第二发射天线 330的辐射方向图的主叶 瓣的反方向指向接收天线 310,由于定向天线主要向辐射方向图的叶瓣所指 向的方向发送或接收信号， 所以， 令第二发射天线 330 的辐射方向图的主 叶瓣的反方向指向接收天线 310能够减少第二发射天线 330对接收天线 310 的干扰。 而且， 由于旁瓣 420会对接收天线 310造成一定的干扰， 所以， 优先采用旁瓣较少而且小的辐射方向图， 最好是采用如图 6所示的没有旁 瓣的辐射方向图。
第一发射天线和第二发射天线的辐射方向图的主叶瓣的反方向指向接 收天线， 能形成 10~25dB的干扰消除。
第一发射天线 320的辐射方向和第二发射天线 330的辐射方向叠加后， 能够形成全方向辐射， 以确保对方的接收天线在 360度方向中的任意一个 方向都能接收发射信号。
接收天线 310接收第一发射天线 320所发射的信号的极化方向与接收 天线 310接收第二发射天线 330所发射的信号的极化方向互相垂直， 形成 10dB的干扰消除。 因为电磁波的振动是有方向的， 极化方向互相垂直以后 就没多少能量引起接收天线 310共振了， 所以， 接收天线 310接收到的信 号的能量最小。
信号产生器 340可以是巴伦转换器， 用于产生两路幅度相同、 相位相 反的发射信号， 并将两路发射信号分别发送给第一发射天线 320 以及第二 发射天线 330。由于第一发射天线 320至接收天线 310的距离等于第二发射 天线 330至接收天线 310的距离， 所以， 第一发射天线 320所发出的信号 和第二发射天线 330所发出的信号在接收天线 310处的相位刚好反相， 形 成相消。 第一发射天线 320以及第二发射天线 330所发出的信号在接收天 线 310处产生 30dB的干扰消除。而第一发射天线 320至接收天线 310的距 离与第二发射天线 330至接收天线 310的距离不一定相同， 而且， 第一发 射天线 320所发送的信号和第二发射天线 330所发送的信号会在传输空间 中形成多径效应， 到达接收天线 310 时的相位各不相同， 又或者， 接收方 在其中一个发射天线的正方向时， 接收到这根天线的强度大于另一根发射 天线的强度， 所以， 两根发射天线发送两路幅度相同、 相位相反的发射信 号不会对对方的接收天线造成影响。
模数转换器 350用于将接收天线 310接收到的模拟的发射信号转变为 数字的发射信号， 并发送给数据干扰消除器 370。
数模转换器 360接收数据干扰消除器 370所发送的模拟的调制信号， 并将模拟的发射信号转换为数字的发射信号， 并发送给信号产生器 340。
数字干扰消除器 370用于消除接收天线接收到的， 来自第一发射天线 320以及第二发射天线 330的干扰信号。尽管上面模拟部分采用了各种方法 对第一发射天线 320以及第二发射天线 330所发射的信号进行相消， 但是， 依然有部分信号作为干扰信号和对方所发送的信号一起被接收天线 310所 接收。 此时， 可通过数字干扰消除器 350对干扰信号进行消除。 数字干扰 消除器能够产生 35dBm的干扰消除。 数字干扰消除器 370可采用数字信号 处理器等等具有快速计算能力的处理器来实现。
请一并参阅图 7,图 7是本申请全双工天线中数字干扰消除器一实施方 式的结构示意图。本实施方式的数字干扰消除器 350包括第一延时模块 351、 减法模块 352、 信道估计 353、 信号重建模块以及第二延时模块 355。
接收天线 310所接收到的信号即包括对方发射天线所发送的信号， 也 包括自身的第一发射天线 320和第二发射天线 330所发送的信号， 其中， 对方发射天线所发送的信号是希望被接收到的信号， 为有用信号， 而， 第 一发射天线 320和第二发射天线 330所发送的信号则是不希望被接收到的 信号， 为干扰信号。
由于对方发射天线所发送的信号和自身的第一发射天线 320和第二发 射天线 330所发送的信号是混叠在一起的，无法直接获知第一发射天线 320 和第二发射天线 330所带来的干扰信号。 所以， 要从接收天线 310接收到 的信号中去掉第一发射天线 320和第二发射天线 330所带来的干扰信号， 则必须先利用信道估计模块 353对信道进行估计以获得信道估计， 然后再 利用信号重建模块 354根据信道估计和用于第一发射天线 320和第二发射 天线 330进行发射的调制信号重建出被接收天线 310所接收到的干扰信号。 最后再利用减法模块 352将接收天线 310接收到的信号减去重建得到的干 扰信号， 从而达到对干扰信号进行消除。 而且， 调制信号在空间传播然后 被接收天线 310所接收所花的时间与在调制信号在数字干扰消除器 350中 传输所花的时间是不一样的， 所以， 必须利用第一延时模块 351 和第二延 时模块 355进行时延， 以确保接收天线 310接收到的信号和信号重建模块 354重建得到的干扰信号同时到达减法模块 352。
上述方案， 在模拟信号部分， 通过设置第一发射天线和第二发射天线 的为定向天线， 并且， 两者的辐射方向图的主叶瓣的反方向指向接收天线， 形成 10~25dB的干扰消除。 接收天线接收第一发射天线所发射的信号的极 化方向与接收天线接收第二发射天线所发射的信号的极化方向互相垂直， 形成 10dB的干扰消除。 信号产生器产生两个幅度相同、 相位相反的信号， 并分别通过第一发射天线以及第二发射天线发送出来， 而且， 第一发射天 线与第二发射天线至接收天线的距离相等， 第一发射天线以及第二发射天 线所发出的信号在接收天线处产生 30dB的干扰消除。 在数字信号部分， 数 字干扰消除器能够产生 35dB的干扰消除。所以，总共能产生 105~110dB的 干扰消除， 所以， 能够在同一时隙以及同一频率实现双向通信。 而且， 两 根发射天线至接收天线的距离能够做到很近， 而所增加的器件信号产生器 和数字干扰消除器都是芯片级的， 所以可以把全双工天线的体积做得非常 小， 从而在小型化设备上得到应用。 而且， 令第一发射天线与第二发射天 线至接收天线的距离相等， 以及第一发射天线和第二发射天线所发送的是 两个幅度相同、 相位相反的信号， 使得频率发生变化时， 天线的距离不需 要重新设置， 而且， 即使是宽频信号也能达到相消的效果， 使得该全双工 天线对于宽频信号也同样适用。
参阅图 8, 图 8是本申请全双工天线中再一实施方式的结构示意图。 与 图 4所示的全双工天线的不同之处在于， 包括多组收发通路， 每组收发通 路包括接收天线 310、 第一发射天线 320、 第二发射天线 330以及信号产生 器 340, 每组收发通路中接收天线 310、 第一发射天线 320、 第二发射天线 330以及信号产生器 340的设置（包括连接关系、 辐射方向设置、 第一发射 天线 320与第二发射天线 330至接收天线 310的距离、 第一导线和第二导 线的距离等等） 均相同， 此处不重复赘述。 而且， 数字干扰消除器的第一 端用于接收各组的接收天线所输出的接收信号， 数字干扰消除器的第二端 用于向各组的信号产生器输出发射信号。 并且， 同一组收发通路中的第一 发射天线和第二发射天线到任意一个接收天线的距离相同， 例如， 第一组 的第一发射天线 320至第一组的接收天线 310的距离 （d0 )等于第一组的 第二发射天线 330至第一组的接收天线 310的距离 （d0 ); 第一组的第一发 射天线 320至第二组的接收天线 310的距离 U1 )等于第一组的第二发射 天线 330至第二组的接收天线 310的距离（ dl );第一组的第一发射天线 320 至第三组的接收天线 310的距离 U2 )等于第一组的第二发射天线 330至 第三组的接收天线 310的距离 （ dl )。 以确保每一组的第一发射天线 320以 及第二发射天线 330都不会对任意一组的接收天线 310造成影响。
如果采用本申请的全双工天线， 则当发射天线向对方的接收天线发送 信号时， 所发送的信号只会被对方的接收天线所接收， 却不会对自身的接 收天线照成影响， 接收天线可以照常进行数据接收， 所以能在同一频率以 及同一时隙上实现全双工， 大大提高了频谱的使用效率。 而且， 两根发射 天线至接收天线的距离能够做到很近， 而所增加的器件信号产生器和数字 干扰消除器都是芯片级的， 所以可以把全双工天线的体积做得非常小， 从 而在小型化设备上得到应用。 而且， 令第一发射天线与第二发射天线至接 收天线的距离相等， 以及第一发射天线和第二发射天线所发送的是两个幅 度相同、 相位相反的信号， 使得频率发生变化时， 天线的距离不需要重新 设置， 而且， 即使是宽频信号也能达到相消的效果， 使得该全双工天线对 于宽频信号也同样适用。
本申请还提供了一种移动终端， 包括如上述实施方式的全双工天线， 具体参阅图 3至图 8及相关的描述， 此处不重复赘述。
在本申请所提供的几个实施方式中， 应该理解到， 所揭露的系统， 装 置和方法， 可以通过其它的方式实现。 例如， 以上所描述的装置实施方式 仅仅是示意性的， 例如， 所述模块或单元的划分， 仅仅为一种逻辑功能划 分， 实际实现时可以有另外的划分方式， 例如多个单元或组件可以结合或 者可以集成到另一个系统， 或一些特征可以忽略， 或不执行。 另一点， 所 显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接 口， 装置或单元的间接耦合或通信连接， 可以是电性， 机械或其它的形式。 所述作为分离部件说明的单元可以是或者也可以不是物理上分开的， 作为单元显示的部件可以是或者也可以不是物理单元， 即可以位于一个地 方， 或者也可以分布到多个网络单元上。 可以根据实际的需要选择其中的 部分或者全部单元来实现本实施方式方案的目的。
另外， 在本申请各个实施方式中的各功能单元可以集成在一个处理单 元中， 也可以是各个单元单独物理存在， 也可以两个或两个以上单元集成 在一个单元中。 上述集成的单元既可以采用硬件的形式实现， 也可以采用 软件功能单元的形式实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销 售或使用时， 可以存储在一个计算机可读取存储介质中。 基于这样的理解， 本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方 案的全部或部分可以以软件产品的形式体现出来， 该计算机软件产品存储 在一个存储介质中， 包括若干指令用以使得一台计算机设备（可以是个人 计算机， 服务器， 或者网络设备等）或处理器（processor )执行本申请各个 实施方式所述方法的全部或部分步骤。 而前述的存储介质包括： U盘、 移 动硬盘、只读存储器（ROM, Read-Only Memory )、随机存取存储器（RAM, Random Access Memory ), 磁碟或者光盘等各种可以存储程序代码的介质。

Claims

权利要求
1.一种全双工天线， 其特征在于， 包括：
接收天线；
第一发射天线， 设置于所述接收天线的一侧， 所述第一发射天线为定 向天线， 并且， 所述第一发射天线的辐射方向图的主叶瓣的反方向指向所 述接收天线；
第二发射天线， 设置于所述接收天线的另一侧， 并且， 所述第二发射 天线至所述接收天线的距离等于所述第一发射天线至所述接收天线的距 离， 所述第二发射天线为定向天线， 并且， 所述第二发射天线的辐射方向 图的主叶瓣的反方向指向所述接收天线。
2.根据权利要求 1所述的全双工天线， 其特征在于，
所述接收天线接收所述第一发射天线所发射的信号的极化方向与所述 接收天线接收所述第二发射天线所发射的信号的极化方向互相垂直。
3.根据权利要求 1所述的全双工天线， 其特征在于， 所述全双工天线还 包括：
信号产生器， 所述信号产生器的第一输出端通过第一导线连接所述第 一发射天线， 所述信号产生器的第二输出端通过第二导线连接所述第二发 射天线， 所述信号产生器用于产生两路幅度相同并且相位相反的发射信号， 并将两路发射信号分别发送给所述第一发射天线以及所述第二发射天线。
4.根据权利要求 3所述的全双工天线， 其特征在于， 所述第一导线与所 述第二导线的长度相等。
5.根据权利要求 3所述的全双工天线， 其特征在于， 所述全双工天线还 包括：
数字干扰消除器， 所述数字干扰消除器用于接收从接收天线接收到的 接收信号， 所述数字干扰消除器用于消除所述接收天线接收到的， 来自所 述第一发射天线以及第二发射天线的干扰信号。
6.根据权利要求 5所述的全双工天线，其特征在于，包括多组收发通路， 每组收发通路包括接收天线、 第一发射天线、 第二发射天线以及信号产生 器， 所述数字干扰消除器的第一端用于接收各组的接收天线所输出的接收 信号， 所述数字干扰消除器的第二端用于向各组的信号产生器输出发射信 号， 并且， 同一组收发通路中的第一发射天线和第二发射天线到任意一个 接收天线的距离相同。
7.根据权利要求 5所述的全双工天线， 其特征在于， 包括模数转换器， 所述模数转换器一端连接所述接收天线， 另一端连接所述数字干扰消除器， 所述模数转换器用于将接收天线所接收到的模拟的接收信号转换为数字的 接收信号， 并发送给所述数字干扰消除器。
8.根据权利要求 5所述的全双工天线， 其特征在于， 包括数模转换器， 所述数模转换器一端连接所述信号产生器， 另一端连接所述数字干扰消除 器， 所述数模转换器用于将所述数字干扰消除器所发送的数字的发射信号 转换为模拟的发射信号， 并发送给所述信号产生器。
9.根据权利要求 1所述的全双工天线， 其特征在于， 所述第一发射天线 以及所述第二发射天线的辐射方向图没有旁瓣。
10.根据权利要求 1所述的全双工天线， 其特征在于， 所述第一发射天 线的辐射主瓣方向和所述第二发射天线的辐射主瓣方向叠加后， 形成全方 向辐射， 其中， 所述全方向辐射使得在 360度方向中的任意一个方向都能 接收所述发射信号。
11.一种移动终端， 包括全双工天线， 其特征在于， 所述全双工天线为 如权利要求 1-10任一权利要求所述的全双工天线。
PCT/CN2013/089991 2013-12-19 2013-12-19 全双工天线以及移动终端 WO2015089801A1 (zh)

Priority Applications (9)

Application Number Priority Date Filing Date Title
RU2016104782A RU2628015C1 (ru) 2013-12-19 2013-12-19 Полнодуплексная антенна и мобильный терминал
CN201380081580.5A CN105814869B (zh) 2013-12-19 2013-12-19 全双工天线以及移动终端
EP13899394.4A EP2999196B1 (en) 2013-12-19 2013-12-19 Full-duplex antenna and mobile terminal
PCT/CN2013/089991 WO2015089801A1 (zh) 2013-12-19 2013-12-19 全双工天线以及移动终端
JP2016543291A JP6260048B2 (ja) 2013-12-19 2013-12-19 全二重アンテナおよび移動端末
BR112016003045-1A BR112016003045B1 (pt) 2013-12-19 2013-12-19 Antena de duplexação completa e terminal móvel
CA2916030A CA2916030C (en) 2013-12-19 2013-12-19 Full-duplex antenna and mobile terminal
KR1020167000887A KR101725532B1 (ko) 2013-12-19 2013-12-19 풀 듀플렉스 안테나 및 이동 단말기
US15/135,830 US10003123B2 (en) 2013-12-19 2016-04-22 Full-duplex antenna and mobile terminal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2013/089991 WO2015089801A1 (zh) 2013-12-19 2013-12-19 全双工天线以及移动终端

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US15/135,830 Continuation US10003123B2 (en) 2013-12-19 2016-04-22 Full-duplex antenna and mobile terminal

Publications (1)

Publication Number Publication Date
WO2015089801A1 true WO2015089801A1 (zh) 2015-06-25

Family

ID=53401976

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2013/089991 WO2015089801A1 (zh) 2013-12-19 2013-12-19 全双工天线以及移动终端

Country Status (9)

Country Link
US (1) US10003123B2 (zh)
EP (1) EP2999196B1 (zh)
JP (1) JP6260048B2 (zh)
KR (1) KR101725532B1 (zh)
CN (1) CN105814869B (zh)
BR (1) BR112016003045B1 (zh)
CA (1) CA2916030C (zh)
RU (1) RU2628015C1 (zh)
WO (1) WO2015089801A1 (zh)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6951478B2 (ja) * 2017-03-16 2021-10-20 エムヴィージー インダストリーズＭｖｇ Ｉｎｄｕｓｔｒｉｅｓ 複数の放射素子を含むアンテナの検査方法、および複数の放射素子を含むアンテナの検査システム
US11108165B2 (en) 2018-08-17 2021-08-31 The Regents Of The University Of Michigan Radio frequency front end for full duplex wireless communications
US10756436B2 (en) 2018-10-18 2020-08-25 Sabanci Universitesi Double-differential fed, dual polarized patch antenna system with advanced interport RF isolation for IBFD transceivers
CN112134586B (zh) * 2019-06-05 2022-05-17 华为技术有限公司 收发装置及收发设备
CN113904706B (zh) * 2020-06-22 2023-12-29 华为技术有限公司 终端设备、信号传输方法及基带芯片
CN113964481B (zh) * 2021-12-22 2022-04-08 中国人民解放军海军工程大学 一种超短波取样天线阵列及其建立方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101459441A (zh) * 2007-12-11 2009-06-17 海华科技股份有限公司 双系统通讯模块及其操作模式定义方法
US8160664B1 (en) * 2005-12-05 2012-04-17 Meru Networks Omni-directional antenna supporting simultaneous transmission and reception of multiple radios with narrow frequency separation
CN103117970A (zh) * 2013-01-31 2013-05-22 北京邮电大学 Mimo系统中全双工天线的选择方法

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2100878C1 (ru) * 1995-11-28 1997-12-27 Военная академия связи Дуплексная антенна
JP4459738B2 (ja) * 2004-07-05 2010-04-28 株式会社エヌ・ティ・ティ・ドコモ 中継装置、通信装置および指向性制御方法
JP4403905B2 (ja) * 2004-07-22 2010-01-27 ブラザー工業株式会社 無線通信装置
KR100695328B1 (ko) * 2004-12-21 2007-03-15 한국전자통신연구원 초격리 안테나
US7817641B1 (en) * 2005-10-20 2010-10-19 Amir Keyvan Khandani Methods for spatial multiplexing of wireless two-way channels
US8570229B2 (en) * 2009-01-15 2013-10-29 Broadcom Corporation Multiple antenna high isolation apparatus and application thereof
US10230419B2 (en) * 2011-02-03 2019-03-12 The Board Of Trustees Of The Leland Stanford Junior University Adaptive techniques for full duplex communications
US8749441B2 (en) * 2011-10-27 2014-06-10 Massachusetts Institute Of Technology Simultaneous transmit and receive antenna system
WO2013074004A1 (en) * 2011-11-15 2013-05-23 Saab Ab Antenna assembly with shielding structure
US10116426B2 (en) * 2012-02-09 2018-10-30 The Regents Fo The University Of California Methods and systems for full duplex wireless communications

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8160664B1 (en) * 2005-12-05 2012-04-17 Meru Networks Omni-directional antenna supporting simultaneous transmission and reception of multiple radios with narrow frequency separation
CN101459441A (zh) * 2007-12-11 2009-06-17 海华科技股份有限公司 双系统通讯模块及其操作模式定义方法
CN103117970A (zh) * 2013-01-31 2013-05-22 北京邮电大学 Mimo系统中全双工天线的选择方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP2999196A4 *

Also Published As

Publication number Publication date
JP6260048B2 (ja) 2018-01-17
CN105814869A (zh) 2016-07-27
KR101725532B1 (ko) 2017-04-10
BR112016003045B1 (pt) 2022-06-14
KR20160020505A (ko) 2016-02-23
US20160240912A1 (en) 2016-08-18
JP2016536929A (ja) 2016-11-24
CA2916030A1 (en) 2015-06-25
EP2999196B1 (en) 2020-04-22
US10003123B2 (en) 2018-06-19
BR112016003045A2 (zh) 2017-08-01
CA2916030C (en) 2018-02-13
CN105814869B (zh) 2019-03-01
RU2628015C1 (ru) 2017-08-14
EP2999196A4 (en) 2016-09-21
EP2999196A1 (en) 2016-03-23

Similar Documents

Publication Publication Date Title
WO2015089801A1 (zh) 全双工天线以及移动终端
CN103634022B (zh) 一种平坦衰落环境下全双工收发机及自干扰对消方法
WO2015149373A1 (zh) 同频干扰抵消方法、装置及系统
CN105376184B (zh) 一种窄带全双工系统的二维天线对消方法
WO2019201055A1 (zh) 全双工自干扰减弱方法及全双工自干扰减弱系统
Vo-Huu et al. Counter-jamming using mixed mechanical and software interference cancellation
CN109067426A (zh) 空间域与极化域联合的全双工自干扰消除方法
WO2015042983A1 (zh) 一种天线和通信设备
WO2014155470A1 (ja) 無線送信機、無線通信システム、昇降機制御・監視システム、および、変電設備制御・監視システム
CN111512558B (zh) 全双工收发机装置
Scherer et al. Simultaneous transmit and receive system architecture with four stages of cancellation
Tewes et al. Full-duplex meets reconfigurable surfaces: RIS-assisted SIC for full-duplex radios
CN103907295B (zh) 用于基于相量差异对数据进行编码的设备和方法
US10742314B2 (en) System and methods for enabling simultaneous transmit and receive in the same wifi band within a device
Shaddad et al. Channel estimation for intelligent reflecting surface in 6G wireless network via deep learning technique
CN105577226B (zh) 一种宽带全双工系统的二维多天线对消方法
TW201916611A (zh) 展頻式聲音頻率通訊系統
Malik et al. Ultrawideband antenna distortion compensation
TWI609529B (zh) 使用於碟盤天線的多元接收器設備與系統
Zhang et al. Two-bit RIS-Aided communications at 3.5 GHz: Some insights from the measurement results under multiple practical scenes
Sun et al. Grid mimo: Exploiting spatiality of power line infrastructure for mimo
Han et al. Application and Performance of Space Time Coding in MIMO System—Analysis of Alamouti Space Time Coding Scheme
RU2696214C1 (ru) Система защищенной радиосвязи
Shandan et al. Full-duplex MIMO wireless communication system
Demirors Reconfigurable Architectures for RF and Underwater Acoustic Wireless Networks

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 13899394

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2916030

Country of ref document: CA

WWE Wipo information: entry into national phase

Ref document number: 2013899394

Country of ref document: EP

ENP Entry into the national phase

Ref document number: 20167000887

Country of ref document: KR

Kind code of ref document: A

ENP Entry into the national phase

Ref document number: 2016543291

Country of ref document: JP

Kind code of ref document: A

ENP Entry into the national phase

Ref document number: 2016104782

Country of ref document: RU

Kind code of ref document: A

REG Reference to national code

Ref country code: BR

Ref legal event code: B01A

Ref document number: 112016003045

Country of ref document: BR

NENP Non-entry into the national phase

Ref country code: DE

ENP Entry into the national phase

Ref document number: 112016003045

Country of ref document: BR

Kind code of ref document: A2

Effective date: 20160212