WO2019006715A1 - 基于反馈控制的分布式安全波束成型方法及装置 - Google Patents

基于反馈控制的分布式安全波束成型方法及装置 Download PDF

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Publication number
WO2019006715A1
WO2019006715A1 PCT/CN2017/091913 CN2017091913W WO2019006715A1 WO 2019006715 A1 WO2019006715 A1 WO 2019006715A1 CN 2017091913 W CN2017091913 W CN 2017091913W WO 2019006715 A1 WO2019006715 A1 WO 2019006715A1
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time slot
sinr
transmitting
end device
receiving end
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English (en)
French (fr)
Inventor
谢宁
徐凯
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Shenzhen University
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Shenzhen University
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00—Arrangements for synchronising receiver with transmitter

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a distributed safety beamforming method and apparatus based on feedback control.
  • Distributed Beamforming is a cooperative communication technology in which multiple transmitting devices transmit the same information to the target device and control the transmitting phase of the transmitting device to make the signals of multiple transmitting devices at the target end.
  • the device is effectively merged.
  • phase synchronization algorithms using only single-bit feedback information have been proposed and have been extensively studied.
  • the method can realize phase synchronization of the transmitting device to the receiving device through single bit information under a limited feedback channel capacity, but the existing single bit phase synchronization method is only suitable for a reliable communication environment. This method cannot implement distributed secure communication when there is a eavesdropping device stealing information in the environment.
  • the embodiment of the invention discloses a distributed safety beamforming method and device based on feedback control, which can realize distributed secure communication and improve the security performance of the distributed secure communication system.
  • a first aspect of the embodiments of the present invention discloses a distributed safety beamforming method based on feedback control, which is applied to a transmitting end device included in a distributed secure communication system, where the distributed secure communication system includes a plurality of the transmitting end devices, The receiving end device and the eavesdropping end device, the method comprising:
  • a feedback signal where the feedback signal is used to indicate that the first signal to interference and noise ratio SINR of the receiving end device in the nth time slot is compared to the nth time slot stored by the receiving end device Whether the second SINR is increased;
  • a correlation parameter of transmitting a transmission weight of the first artificial noise signal in the (n+1)th time slot where the correlation parameter includes a transmission phase, a correction factor, and a random disturbance
  • the nth time slot is a current time slot, and the (n+1)th time slot is the current time slot.
  • the next time slot, the n is a positive integer.
  • the adjusting, according to the feedback signal, adjusting a correlation parameter of transmitting a weight of the first artificial noise signal in the (n+1)th time slot includes: :
  • the feedback signal is used to indicate that the first SINR of the receiving end device in the nth time slot is higher than the second SINR of the nth time slot stored by the receiving end device, determining
  • the feedback signal is used to indicate that the first SINR of the receiving end device in the nth time slot is not increased compared to the second SINR of the nth time slot stored by the receiving end device, determining
  • the method further includes:
  • the device on the transmitting device The number of positive feedback counters is incremented by one;
  • the method further includes:
  • the transmitting end device is The number of negative feedback counters is incremented by one;
  • the method further includes:
  • a second aspect of the embodiments of the present invention discloses a distributed safety beamforming method based on feedback control, which is applied to a receiving end device included in a distributed secure communication system, where the distributed secure communication system includes multiple transmitting end devices and a eavesdropping end. Equipment, the method comprising:
  • n is the nth time slot is a current time slot, and n is a positive integer.
  • the determining, according to the first SINR, the feedback signal includes:
  • the first SINR is greater than the second SINR, determining a feedback signal for indicating that the first SINR is compared to the second SINR;
  • the first SINR is less than or equal to the second SINR, determining a feedback signal indicating that the first SINR is not boosted compared to the second SINR.
  • the method further includes include:
  • a third aspect of the embodiments of the present invention discloses a distributed security beamforming device, which is used in a transmitting end device included in a distributed secure communication system, and includes:
  • a receiving unit configured to receive a feedback signal sent by the receiving end device, where the feedback signal is used to indicate that the first signal to interference and noise ratio (SINR) of the receiving end device in the nth time slot is compared with the receiving end device. Whether the second SINR of the nth time slot is increased;
  • SINR signal to interference and noise ratio
  • an adjusting unit configured to adjust, according to the feedback signal, a correlation parameter for transmitting a transmission weight of the first artificial noise signal in the (n+1)th time slot, where the correlation parameter includes a transmission phase, a correction factor, and a random disturbance;
  • the nth time slot is a current time slot
  • the (n+1)th time slot is a next time slot of the current time slot
  • the n is a positive integer
  • the adjusting unit includes:
  • a first determining subunit configured to: if the feedback signal is used to indicate that the first SINR of the receiving end device in the nth time slot is higher than the second SINR of the nth time slot stored by the receiving end device, determine
  • a second determining subunit configured to: if the feedback signal is used to indicate that the first SINR of the receiving end device in the nth time slot is not improved compared to the second SINR of the nth time slot stored by the receiving end device ,determine
  • the distributed safety beamforming device further includes:
  • a first counting unit configured to: if the feedback signal is used to indicate that the first SINR of the receiving end device in the nth slot is higher than the second SINR of the nth slot stored by the receiving device, The number of positive feedback counters on the transmitting device is accumulated by one;
  • the first determining subunit is determined The specific way is:
  • the distributed safety beamforming device further includes:
  • a second counting unit configured to: if the feedback signal is used to indicate that the first SINR of the receiving end device in the nth time slot is not increased compared to the second SINR of the nth time slot stored by the receiving end device, Adding the number of negative feedback counters on the transmitting device to 1;
  • the second determining subunit is determined The specific way is:
  • the distributed safety beamforming device further includes:
  • a saving unit configured to save the random disturbance of transmitting the weight of the second artificial noise signal in the nth time slot.
  • a fourth aspect of the embodiments of the present invention discloses a distributed security beamforming device, which is implemented on a receiving end device included in a distributed secure communication system, and includes:
  • a sending unit configured to receive, by the nth time slot, a first signal sent by the multiple sending end devices; where n is the nth time slot is a current time slot, and the n is a positive integer.
  • a first determining unit configured to determine, according to the first signal, a first signal to interference and noise ratio SINR in an nth time slot;
  • a second determining unit configured to determine, according to the first SINR, a feedback signal, where the feedback signal is used to indicate that the first signal to interference and noise ratio SINR of the receiving end device in the nth time slot is compared to the receiving end Whether the second SINR of the nth slot stored by the device is increased;
  • the sending unit is further configured to send the feedback signal to a plurality of the transmitting end devices.
  • the determining, by the second determining unit, the feedback signal according to the first SINR includes:
  • the first SINR is greater than the second SINR, determining a feedback signal for indicating that the first SINR is compared to the second SINR;
  • the first SINR is less than or equal to the second SINR, determining a feedback signal indicating that the first SINR is not boosted compared to the second SINR.
  • the distributed safety beamforming device further includes:
  • a storage unit configured to store a larger SINR of the first SINR and the second SINR as an SINR of the (n+1)th slot of the receiving end device; where the (n+1)th The time slot is the next time slot of the current time slot.
  • the embodiment of the invention has the following beneficial effects:
  • the transmitting end device may receive the feedback signal sent by the receiving end device, where the feedback signal is used to indicate that the first signal to interference and noise ratio SINR of the receiving end device in the nth time slot is compared with the Whether the second SINR of the nth time slot stored by the receiving end device is increased; further, the transmitting end device may adjust, according to the feedback signal, the transmitting weight of the first artificial noise signal in the (n+1)th time slot.
  • Related parameters including transmit phase, correction factor, and random perturbation.
  • the transmitting end device only needs to use the feedback information sent by the receiving end device, and can send the phase of the transmitting weight of the first artificial noise signal to the (n+1)th time slot.
  • the off parameter is adjusted to minimize the interference power of the first artificial noise signal at the receiving end device, thereby enabling distributed secure communication and improving the security performance of the distributed secure communication system.
  • FIG. 1 is a schematic diagram of a model of a distributed secure communication system according to an embodiment of the present invention
  • FIG. 2 is a schematic flow chart of a distributed safety beamforming method based on feedback control according to an embodiment of the present invention
  • FIG. 3 is a schematic flow chart of another distributed safety beamforming method based on feedback control disclosed in an embodiment of the present invention.
  • FIG. 4 is a schematic flow chart of another distributed safety beamforming method based on feedback control disclosed in an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of convergence of a security capacity of a distributed secure communication system according to an embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of a distributed safety beamforming device according to an embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of another distributed safety beamforming device according to an embodiment of the present invention.
  • the embodiment of the invention discloses a distributed safety beamforming method and device based on feedback control, which can realize distributed secure communication and improve the security performance of the distributed secure communication system.
  • the details are described below in conjunction with the drawings.
  • FIG. 1 is a schematic diagram of a model of a distributed secure communication system according to an embodiment of the present invention.
  • Each of the transmitting end devices S i and the receiving end device D is equipped with a single antenna, and the eavesdropping device E is equipped with multiple antennas.
  • the transmitting device S i is mainly used for transmitting and receiving signals, such as transmitting an artificial noise signal and receiving a feedback signal, and the transmitting device S i may be a base station.
  • a base station e.g., an access point
  • the base station can refer to a device in an access network that communicates with a wireless terminal over one or more sectors over an air interface.
  • the base station can be used to convert the received air frame to the IP packet as a router between the wireless terminal and the rest of the access network, wherein the remainder of the access network can include an Internet Protocol (IP) network.
  • IP Internet Protocol
  • the base station can also coordinate attribute management of the air interface.
  • the base station may be a base station (BTS, Base Transceiver Station) in GSM or CDMA, or may be a base station (NodeB) in WCDMA, or may be an evolved base station in LTE (NodeB or eNB or e-NodeB, evolutional Node B), the embodiment of the present invention is not limited.
  • BTS Base Transceiver Station
  • NodeB base station
  • NodeB evolved base station
  • LTE NodeB or eNB or e-NodeB, evolutional Node B
  • the receiving device D is mainly used for transmitting and receiving signals, such as transmitting an artificial noise signal and receiving a useful signal, and the target device D may be a base station.
  • the eavesdropping device E is mainly used for monitoring the signal sent by the transmitting end device S i to the receiving end device D, and monitoring the signal sent by the receiving end device D to the transmitting end device S i , and adjusting its own beamforming according to the received signal.
  • the eavesdropping device E may include, but is not limited to, a base station, a user equipment, a communication vehicle, and the like.
  • the coordinates of the receiving device D are represented as (0, r D ), and the coordinates of the eavesdropping device E are expressed as (r E sin ⁇ E , r E cos ⁇ E ), where ⁇ E represents the angle between the eavesdropping device E and the y-axis at the coordinates shown in FIG. N
  • distributed transmitting devices that have been frequency-synchronized are randomly distributed in a circle with a radius of r S , and the distribution rules of these transmitting devices are uniformly distributed, that is, each distributed transmitting device appears at any position in the circle. The probability is the same.
  • ⁇ represents the carrier wavelength
  • Indicates the free space path loss of the i-th transmitter device to the eavesdropping device E Indicates the distance from the i-th transmitter device to the eavesdrop device E.
  • h DE represents the channel fading between the receiving device D and the eavesdropping device E. Similar to the above definition method, It indicates the free space path loss, distance, and channel fading between the receiving device D and the ith transmitting device when transmitting the feedback signal, respectively.
  • the transmitting end device may receive a feedback signal sent by the receiving end device, where the feedback signal is used to indicate that the receiving end device is in the first time slot of the nth time slot. Whether the noise ratio SINR is higher than the second SINR of the nth slot stored by the receiving end device; further, the transmitting end device may adjust the (n+1)th time according to the feedback signal.
  • the slot transmits a correlation parameter of the transmission weight of the first artificial noise signal to minimize the interference power of the third artificial noise signal at the receiving end device, thereby improving the security of the distributed secure communication system.
  • FIG. 2 is a schematic flowchart diagram of a distributed safety beamforming method based on feedback control according to an embodiment of the present invention.
  • the distributed safety beamforming method based on feedback control is applied to a transmitting end device included in the distributed secure communication system.
  • the distributed safety beamforming method based on feedback control may include the following steps:
  • Step 201 The transmitting end device receives the feedback signal sent by the receiving end device.
  • the feedback signal is used to indicate whether the first signal to interference and noise ratio SINR of the receiving end device in the nth time slot is higher than the second SINR of the nth time slot stored by the receiving end device.
  • the nth time slot is a current time slot, and the n is a positive integer.
  • the transmitting end device may further send the first signal carrying the second artificial noise signal to the receiving end device in the nth time slot.
  • the second artificial noise signal is used to interfere with the estimation accuracy of the first channel direction information by the eavesdropping device.
  • the transmitting, by the transmitting device, the first signal carrying the second artificial noise signal to the receiving device in the nth time slot may be expressed as:
  • x C [n] represents the secret information transmitted in the nth time slot
  • the secret information transmitted by each distributed transmitting end device in each time slot is the same.
  • all distributed transmitting devices transmit the same power of the secret information x C [n] in each time slot, transmit the second artificial noise ⁇ S, i [n] have the same power, and they satisfy the following conditions:
  • P T represents the upper limit of the sum of the power of the secret information x C [n] and the second artificial noise ⁇ S, i [n] transmitted by each distributed transmitting device.
  • the transmit weight can be expressed as
  • the receiving end device may send feedback information to the transmitting end device according to the first signal, where the ith distributed transmitting end
  • the feedback signal received by device S i can be expressed as:
  • x D [n] is a feedback signal determined by the receiving device
  • P C2 indicates that the receiving device D feeds back the transmission power of the single bit control information x B [n]
  • P ⁇ 2 indicates that the receiving device D transmits the power of the second artificial noise signal ⁇ D [n], ⁇ D [n] to CN ( 0,1).
  • Indicates the phase response of the channel when the control information is fed back between the receiving device D and the i-th distributed transmitting device S i Represents additive white Gaussian noise on the ith distributed transmitter device.
  • Step 202 If the feedback signal is used to indicate that the first SINR of the receiving end device in the nth time slot is higher than the second SINR of the nth time slot stored by the receiving end device, the transmitting end device determines
  • Step 203 The transmitting device adds 1 to the number of positive feedback counters on the transmitting device.
  • Step 204 If the number of accumulated positive feedback counters is greater than or equal to the first accumulated threshold, the transmitting device determines
  • the feedback signal is used to indicate that the first SINR of the receiving end device in the nth time slot is higher than the second SINR of the nth time slot stored by the receiving end device, and the accumulated positive feedback is performed. If the number of counters is greater than or equal to the first accumulated threshold, the transmitting device needs to update and determine Conversely, the feedback signal is used to indicate that the first SINR of the receiving end device in the nth time slot is higher than the second SINR of the nth time slot stored by the receiving end device, and the accumulated positive feedback is performed. The number of counters is less than the first accumulated threshold, and the transmitting device does not need to update and determine
  • positive feedback is accumulated. If a negative feedback occurs between the two positive feedbacks, the positive feedback is interrupted, and the positive feedback counter is unclear.
  • Step 205 The transmitting device saves the random perturbation of the transmission weight of the second artificial noise signal in the nth time slot, and ends the process.
  • the feedback signal is used to indicate that the first SINR of the receiving end device in the nth slot is higher than the second SINR of the nth slot stored by the receiving end device.
  • the transmitting device needs to save the random perturbation of the transmission weight of the second artificial noise signal in the nth time slot to prepare for updating the correction factor in the (n+1)th time slot.
  • Step 206 If the feedback signal is used to indicate that the first SINR of the receiving end device in the nth slot is not higher than the second SINR of the nth slot stored by the receiving end device, the transmitting end device determines
  • Step 207 The transmitting device adds 1 to the number of negative feedback counters on the transmitting device.
  • Step 208 If the number of accumulated negative feedback counters is greater than or equal to the second accumulated threshold, the transmitting device determines
  • the feedback signal is used to indicate that the first SINR of the receiving end device in the nth slot is not increased compared to the second SINR of the nth slot stored by the receiving device, and the accumulated negative If the number of feedback counters is greater than or equal to the second accumulated threshold, the transmitting device needs to update and determine Conversely, the feedback signal is used to indicate that the first SINR of the receiving end device in the nth slot is not increased compared to the second SINR of the nth slot stored by the receiving device, and the accumulated negative When the number of feedback counters is less than the second accumulated threshold, the transmitting device does not need to update and determine
  • the negative feedback counter it is continuous negative feedback. If the negative feedback is interrupted by a positive feedback, the negative feedback counter should be cleared to 0.
  • the transmitting end device may receive the feedback signal sent by the receiving end device, where the feedback signal is used to indicate the first signal to interference and noise ratio SINR of the receiving end device in the nth time slot. Whether the second SINR of the nth time slot stored by the receiving end device is increased; further, the transmitting end device may adjust the (n+1)th time slot to send the first artificial noise signal according to the feedback signal.
  • the transmit phase, the correction factor, and the random disturbance of the transmit weight are such that the interference power of the third artificial noise signal at the receiving device is minimized, thereby improving the security of the distributed secure communication system.
  • FIG. 3 is a schematic flowchart diagram of another distributed safety beamforming method based on feedback control according to an embodiment of the present invention.
  • the distributed safety beamforming method based on feedback control is applied to a receiving end device included in the distributed secure communication system.
  • the distributed safety beamforming method based on feedback control may include the following steps:
  • Step 301 The receiving end device receives, in the nth time slot, a plurality of first signals sent by the transmitting end device.
  • the n is the current time slot, and the n is a positive integer.
  • the receiving end device receives, in the nth time slot, a plurality of first signals sent by the transmitting end device, which may be represented as
  • Step 302 The receiving end device determines, according to the first signal, a first signal to interference and noise ratio SINR in the nth time slot.
  • the signal to interference and noise ratio of the receiving device in the nth time slot can be expressed as:
  • the amount of mutual information R D [n] between the transmitting device and the receiving device in the nth time slot can be expressed as:
  • the safety capacity R S [n] on the receiving device D can be expressed as:
  • Step 303 The receiving end device determines a feedback signal according to the first SINR.
  • the feedback signal is used to indicate whether the first signal to interference and noise ratio SINR of the receiving end device in the nth time slot is higher than the second SINR of the nth time slot stored by the receiving end device;
  • Determining, by the receiving device, the feedback signal according to the first SINR includes:
  • the first SINR is greater than the second SINR, determining a feedback signal for indicating that the first SINR is compared to the second SINR;
  • the first SINR is less than or equal to the second SINR, determining a feedback signal indicating that the first SINR is not boosted compared to the second SINR.
  • the feedback signal determined by the receiving device can be expressed as:
  • P C2 indicates that the receiving device D feeds back the transmission power of the single bit control information x B [n]
  • P ⁇ 2 indicates that the receiving device D transmits the power of the third artificial noise signal ⁇ D [n], ⁇ D [n] ⁇ CN (0,1).
  • bit 1 may be used to indicate that the first SINR is compared to the second SINR, and is referred to as single-bit positive feedback, and bit 0 indicates that the first SINR is not improved compared to the second SINR. And call it a single-bit negative feedback.
  • the receiving end device only needs to feed back single-bit control information, which can save network resources.
  • Step 304 The receiving end device sends the feedback signal to a plurality of the transmitting end devices.
  • Step 305 The receiving end device stores the larger SINR of the first SINR and the second SINR as the SINR of the (n+1)th slot of the receiving end device.
  • the (n+1)th time slot is the next time slot of the current time slot.
  • the receiving end device may receive the first signal sent by the multiple transmitting end devices in the nth time slot; and determine the first information in the nth time slot according to the first signal. a dry noise ratio SINR; and after determining the feedback signal according to the first SINR, transmitting the feedback signal to a plurality of the transmitting end devices, so that the transmitting end device can adjust the (n+1)th time according to the feedback signal
  • the slot transmits the transmit phase, the correction factor, and the random disturbance of the transmit weight of the first artificial noise signal, thereby enabling distributed secure communication and improving the security performance of the distributed secure communication system.
  • FIG. 4 is a schematic flowchart diagram of another distributed safety beamforming method based on feedback control according to an embodiment of the present invention; wherein the distributed safety beamforming method based on feedback control is from a transmitting device and For some or all of the steps in FIG. 4, the description in FIG. 2 or FIG. 3 may be referred to, and details are not described herein again.
  • the feedback-based distributed safety beamforming method may include the following steps:
  • Step 401 The transmitting end device sends the first signal to the receiving end device in the nth time slot.
  • Step 402 The receiving end device determines, according to the first signal, a first signal to interference and noise ratio SINR in the nth time slot.
  • Step 403 The receiving end device determines a feedback signal according to the first SINR.
  • Step 404 The receiving end device sends the feedback signal to a plurality of the transmitting end devices.
  • Step 405 The transmitting end device adjusts, according to the feedback signal, a transmitting phase, a correction factor, and a random disturbance of transmitting the transmission weight of the first artificial noise signal in the (n+1)th time slot.
  • FIG. 5 is a schematic diagram of convergence of a secure capacity of a distributed secure communication system according to an embodiment of the present invention. As shown in FIG. 5, the security capacity of the distributed secure communication system is significantly improved after the iteration ends. The more the number of transmitting devices, the higher the confidential capacity of the distributed secure communication system.
  • the transmitting device may send the first signal to the receiving device in the nth time slot, and the receiving device determines the first signal to interference and noise ratio SINR in the nth time slot according to the first signal, and according to the first SINR Determining a feedback signal and transmitting the feedback signal to a plurality of the transmitting end devices, and the transmitting end device may adjust the transmitting weight of the first artificial noise signal in the (n+1)th time slot according to the feedback signal.
  • the transmission phase, the correction factor, and the random disturbance are such that the interference power of the third artificial noise signal at the receiving end device is minimized, thereby improving the security of the distributed secure communication system.
  • FIG. 6 is a schematic structural diagram of a distributed safety beamforming apparatus according to an embodiment of the present invention.
  • the distributed safety beamforming device described in FIG. 6 can be implemented in a transmitting end device included in the distributed secure communication system, and the distributed safety beam forming device described in FIG. 6 can be used to perform the description described in FIG. 2 or FIG.
  • the distributed safety beamforming device can include:
  • the receiving unit 601 is configured to receive a feedback signal sent by the receiving end device, where the feedback signal is used to indicate that the first signal to interference and noise ratio SINR of the receiving end device in the nth time slot is compared with the receiving end device. Whether the second SINR of the stored nth slot is increased;
  • the adjusting unit 602 is configured to adjust, according to the feedback signal, a correlation parameter for transmitting a transmission weight of the first artificial noise signal in the (n+1)th time slot, where the correlation parameter includes a transmission phase, a correction factor, and a random disturbance;
  • the nth time slot is a current time slot
  • the (n+1)th time slot is a next time slot of the current time slot
  • the n is a positive integer
  • the adjusting unit 602 includes:
  • a first determining sub-unit 6021 configured to: if the feedback signal is used to indicate that the first SINR of the receiving end device in the nth time slot is higher than the second SINR of the nth time slot stored by the receiving end device ,determine
  • a second determining sub-unit 6022 configured to: if the feedback signal is used to indicate that the first SINR of the receiving end device in the nth slot is smaller than the second SINR of the nth slot stored by the receiving end device Upgrade, determine
  • the distributed safety beamforming device further includes:
  • a first counting unit 603, configured to: if the feedback signal is used to indicate that the first SINR of the receiving end device in the nth time slot is higher than the second SINR of the nth time slot stored by the receiving end device, Adding the number of positive feedback counters on the transmitting device to 1;
  • the first determining subunit 6021 determines The specific way is:
  • the distributed safety beamforming device further includes:
  • the second counting unit 604 is configured to: if the feedback signal is used to indicate that the first SINR of the receiving end device in the nth time slot is not improved compared to the second SINR of the nth time slot stored by the receiving end device Adding the number of negative feedback counters on the transmitting device to 1;
  • the second determining subunit 6022 determines The specific way is:
  • the distributed safety beamforming device further includes:
  • the saving unit 605 is configured to save the random perturbation of the transmission weight of the second artificial noise signal in the nth time slot.
  • the transmitting end device may receive a feedback signal sent by the receiving end device, where the feedback signal is used to indicate the first letter of the receiving end device in the nth time slot. Whether the dry-noise ratio SINR is higher than the second SINR of the n-th slot stored by the receiving device; further, the transmitting device may adjust the (n+1)th slot to send the first according to the feedback signal.
  • the transmitting end device only needs to use the feedback information sent by the receiving end device, and can adjust the relevant parameters of the transmitting weight of the first artificial noise signal in the (n+1)th time slot to The interference power of the first artificial noise signal at the receiving end device is minimized, thereby enabling distributed secure communication and improving the security performance of the distributed secure communication system.
  • FIG. 7 is a schematic structural diagram of another distributed safety beamforming apparatus according to an embodiment of the present invention.
  • the distributed safety beamforming device described in FIG. 7 operates on a receiving end device included in the distributed secure communication system, and the distributed safety beamforming device described in FIG. 7 can be used to perform the method described in FIG. 3 or FIG.
  • the distributed safety beamforming device can include:
  • the sending unit 701 is configured to receive, by the nth time slot, a plurality of first signals sent by the transmitting end device, where n is the nth time slot is a current time slot, and the n is a positive integer.
  • a first determining unit 702 configured to determine, according to the first signal, a first letter in an nth time slot Dry noise ratio SINR;
  • a second determining unit 703 configured to determine, according to the first SINR, a feedback signal, where the feedback signal is used to indicate that the first signal to interference and noise ratio SINR of the receiving end device in the nth time slot is compared to the receiving Whether the second SINR of the nth slot stored by the end device is increased;
  • the sending unit 701 is further configured to send the feedback signal to multiple sending end devices.
  • the determining, by the second determining unit 703, the feedback signal according to the first SINR includes:
  • the first SINR is greater than the second SINR, determining a feedback signal for indicating that the first SINR is compared to the second SINR;
  • the first SINR is less than or equal to the second SINR, determining a feedback signal indicating that the first SINR is not boosted compared to the second SINR.
  • the distributed safety beamforming device further includes:
  • the storage unit 704 is configured to store the SINR of the first SINR and the second SINR as the SINR of the (n+1)th slot of the receiving end device; where the (n+1) The time slot is the next time slot of the current time slot.
  • the receiving end device may receive the first signal sent by the plurality of transmitting end devices in the nth time slot; and determine the nth time slot according to the first signal.
  • the first signal to interference and noise ratio SINR and after determining the feedback signal according to the first SINR, sending the feedback signal to a plurality of the transmitting end devices, so that the transmitting end device can adjust the first according to the feedback signal.
  • the time slot transmits the transmission phase, the correction factor and the random disturbance of the transmission weight of the first artificial noise signal, thereby enabling distributed secure communication and improving the security performance of the distributed secure communication system.
  • the disclosed device can be Other ways to achieve.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or may be Integrate 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 an indirect coupling or communication connection through some interface, device or unit, and may be electrical or otherwise.
  • 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 embodiment.
  • each functional unit in each embodiment of the present invention 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 memory. Based on such understanding, the technical solution of the present invention may contribute 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 memory. A number of instructions are included to cause a computer device (which may be a personal computer, server or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention.
  • the foregoing memory includes: a U disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic disk, or an optical disk, and the like, which can store program codes.
  • ROM Read-Only Memory
  • RAM Random Access Memory

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Abstract

本发明提供了一种基于反馈控制的分布式安全波束成型方法及装置，该方法包括：接收所述接收端设备发送的反馈信号，所述反馈信号用于表示所述接收端设备在第n时隙的第一信干噪比SINR相较于所述接收端设备存储的第n时隙的第二SINR是否提升；根据所述反馈信号，调整第(n+1)时隙发送第一人工噪声信号的发射权值的相关参数，所述相关参数包括发射相位、修正因子以及随机扰动；本发明实施例能够实现分布式安全通信，同时，提高分布式安全通信系统的保密性能。

Description

基于反馈控制的分布式安全波束成型方法及装置 技术领域
本发明涉及通信技术领域，尤其涉及一种基于反馈控制的分布式安全波束成型方法及装置。
背景技术
分布式波束成型(Distributed Beamforming)是一种协同通信技术，由多个发射端设备发送相同的信息给目标端设备，并通过控制发射端设备的发射相位使多个发射端设备的信号在目标端设备进行有效的合并。
近年来，只利用单比特反馈信息的相位同步算法被提出，并得到了广泛的研究。该方法可以在有限的反馈信道容量下，通过单比特信息实现发射端设备到接收端设备的相位同步，但是现有的单比特相位同步方法只适用于可靠的通信环境。当环境中有窃听端设备窃取信息时，该方法不能实现分布式安全通信。
发明内容
本发明实施例公开了一种基于反馈控制的分布式安全波束成型方法及装置，能够实现分布式安全通信，同时，提高分布式安全通信系统的保密性能。
本发明实施例第一方面公开一种基于反馈控制的分布式安全波束成型方法，应用于分布式安全通信系统包括的发射端设备，所述分布式安全通信系统包括多个所述发射端设备、接收端设备以及窃听端设备，所述方法包括：
接收所述接收端设备发送的反馈信号，所述反馈信号用于表示所述接收端设备在第n时隙的第一信干噪比SINR相较于所述接收端设备存储的第n时隙的第二SINR是否提升；
根据所述反馈信号，调整第(n+1)时隙发送第一人工噪声信号的发射权值的相关参数，所述相关参数包括发射相位、修正因子以及随机扰动；
其中，所述第n时隙为当前时隙，所述第(n+1)时隙为所述当前时隙 的下一个时隙，所述n为正整数。
作为一种可选的实施方式，在本发明实施例第一方面中，所述根据所述反馈信号，调整第(n+1)时隙发送第一人工噪声信号的发射权值的相关参数包括：
若所述反馈信号用于表示所述接收端设备在第n时隙的第一SINR相较于所述接收端设备存储的第n时隙的第二SINR提升，确定
Figure PCTCN2017091913-appb-000001
若所述反馈信号用于表示所述接收端设备在第n时隙的第一SINR相较于所述接收端设备存储的第n时隙的第二SINR未提升，确定
Figure PCTCN2017091913-appb-000002
Figure PCTCN2017091913-appb-000003
其中，
Figure PCTCN2017091913-appb-000004
为第(n+1)时隙发送所述第一人工噪声信号的发射权值的发射相位，
Figure PCTCN2017091913-appb-000005
为第(n+1)时隙发送所述第一人工噪声信号的发射权值的修正因子，
Figure PCTCN2017091913-appb-000006
为第(n+1)时隙发送所述第一人工噪声信号的发射权值的随机扰动，
Figure PCTCN2017091913-appb-000007
为第n时隙发送第二人工噪声信号的发射权值的发射相位，
Figure PCTCN2017091913-appb-000008
为第n时隙发送所述第二人工噪声信号的发射权值的修正因子，
Figure PCTCN2017091913-appb-000009
为第n时隙发送所述第二人工噪声信号的发射权值的随机扰动，
Figure PCTCN2017091913-appb-000010
为随机扰动步长
Figure PCTCN2017091913-appb-000011
的增长因子，
Figure PCTCN2017091913-appb-000012
为随机扰动步长
Figure PCTCN2017091913-appb-000013
的下降因子。
作为一种可选的实施方式，在本发明实施例第一方面中，所述方法还包括：
若所述反馈信号用于表示所述接收端设备在第n时隙的第一SINR相较于所述接收端设备存储的第n时隙的第二SINR提升，将所述发射端设备上的正反馈计数器的个数累加1；
若累加后的正反馈计数器的个数大于或等于第一累加阈值，则执行所述的确定
Figure PCTCN2017091913-appb-000014
作为一种可选的实施方式，在本发明实施例第一方面中，所述方法还包括：
若所述反馈信号用于表示所述接收端设备在第n时隙的第一SINR相较于所述接收端设备存储的第n时隙的第二SINR未提升，将所述发射端设备上的负反馈计数器的个数累加1；
若累加后的负反馈计数器的个数大于或等于第二累加阈值，则执行所述的确定
Figure PCTCN2017091913-appb-000015
作为一种可选的实施方式，在本发明实施例第一方面中，所述方法还包括：
保存第n时隙发送所述第二人工噪声信号的发射权值的随机扰动。
本发明实施例第二方面公开一种基于反馈控制的分布式安全波束成型方法，应用于分布式安全通信系统包括的接收端设备，所述分布式安全通信系统包括多个发射端设备以及窃听端设备，所述方法包括：
在第n时隙接收多个所述发射端设备发送的第一信号；其中，所述n为所述第n时隙为当前时隙，所述n为正整数。
根据所述第一信号，确定在第n时隙的第一信干噪比SINR；
根据所述第一SINR，确定反馈信号，所述反馈信号用于表示所述接收端设备在第n时隙的第一信干噪比SINR相较于所述接收端设备存储的第n时隙的第二SINR是否提升；
向多个所述发射端设备发送所述反馈信号。
作为一种可选的实施方式，在本发明实施例第二方面中，所述根据所述第一SINR，确定反馈信号包括：
将所述第一SINR与所述第二SINR进行比较；
若所述第一SINR大于所述第二SINR，则确定用于表示所述第一SINR相较于所述第二SINR提升的反馈信号；
若所述第一SINR小于或等于所述第二SINR，则确定用于表示所述第一SINR相较于所述第二SINR未提升的反馈信号。
作为一种可选的实施方式，在本发明实施例第二方面中，所述方法还包 括：
将所述第一SINR与所述第二SINR中较大的SINR存储为所述接收端设备第(n+1)时隙的SINR；其中，所述第(n+1)时隙为所述当前时隙的下一个时隙。
本发明实施例第三方面公开一种分布式安全波束成型装置，运行于分布式安全通信系统包括的发射端设备，包括：
接收单元，用于接收所述接收端设备发送的反馈信号，所述反馈信号用于表示所述接收端设备在第n时隙的第一信干噪比SINR相较于所述接收端设备存储的第n时隙的第二SINR是否提升；
调整单元，用于根据所述反馈信号，调整第(n+1)时隙发送第一人工噪声信号的发射权值的相关参数，所述相关参数包括发射相位、修正因子以及随机扰动；
其中，所述第n时隙为当前时隙，所述第(n+1)时隙为所述当前时隙的下一个时隙，所述n为正整数。
作为一种可选的实施方式，在本发明实施例第三方面中，所述调整单元包括：
第一确定子单元，用于若所述反馈信号用于表示所述接收端设备在第n时隙的第一SINR相较于所述接收端设备存储的第n时隙的第二SINR提升，确定
Figure PCTCN2017091913-appb-000016
第二确定子单元，用于若所述反馈信号用于表示所述接收端设备在第n时隙的第一SINR相较于所述接收端设备存储的第n时隙的第二SINR未提升，确定
Figure PCTCN2017091913-appb-000017
其中，
Figure PCTCN2017091913-appb-000018
为第(n+1)时隙发送所述第一人工噪声信号的发射权值的发射相位，
Figure PCTCN2017091913-appb-000019
为第(n+1)时隙发送所述第一人工噪声信号的发射权值的修正因子，
Figure PCTCN2017091913-appb-000020
为第(n+1)时隙发送所述第一人工噪声信号的发射权值的随机扰动，
Figure PCTCN2017091913-appb-000021
为第n时隙发送第二人工噪声信号的发射权值的发射相位，
Figure PCTCN2017091913-appb-000022
为第n时隙发送所述第二人工噪声信号的发射权值的修正因子，
Figure PCTCN2017091913-appb-000023
为第n时隙发送所述第二人工噪声信号的发射权值的随机扰动，
Figure PCTCN2017091913-appb-000024
为 随机扰动步长
Figure PCTCN2017091913-appb-000025
的增长因子，
Figure PCTCN2017091913-appb-000026
为随机扰动步长
Figure PCTCN2017091913-appb-000027
的下降因子。
作为一种可选的实施方式，在本发明实施例第三方面中，所述分布式安全波束成型装置还包括：
第一计数单元，用于若所述反馈信号用于表示所述接收端设备在第n时隙的第一SINR相较于所述接收端设备存储的第n时隙的第二SINR提升，将所述发射端设备上的正反馈计数器的个数累加1；
所述第一确定子单元确定
Figure PCTCN2017091913-appb-000028
的方式具体为：
若累加后的正反馈计数器的个数大于或等于第一累加阈值，确定
Figure PCTCN2017091913-appb-000029
作为一种可选的实施方式，在本发明实施例第三方面中，所述分布式安全波束成型装置还包括：
第二计数单元，用于若所述反馈信号用于表示所述接收端设备在第n时隙的第一SINR相较于所述接收端设备存储的第n时隙的第二SINR未提升，将所述发射端设备上的负反馈计数器的个数累加1；
所述第二确定子单元确定
Figure PCTCN2017091913-appb-000030
的方式具体为：
若累加后的负反馈计数器的个数大于或等于第二累加阈值，则执行所述的确定
Figure PCTCN2017091913-appb-000031
作为一种可选的实施方式，在本发明实施例第三方面中，所述分布式安全波束成型装置还包括：
保存单元，用于保存第n时隙发送所述第二人工噪声信号的发射权值的随机扰动。
本发明实施例第四方面公开一种分布式安全波束成型装置，运行于分布式安全通信系统包括的接收端设备，包括：
发送单元，用于在第n时隙接收多个所述发射端设备发送的第一信号；其中，所述n为所述第n时隙为当前时隙，所述n为正整数。
第一确定单元，用于根据所述第一信号，确定在第n时隙的第一信干噪比SINR；
第二确定单元，用于根据所述第一SINR，确定反馈信号，所述反馈信号用于表示所述接收端设备在第n时隙的第一信干噪比SINR相较于所述接收端设备存储的第n时隙的第二SINR是否提升；
所述发送单元，还用于向多个所述发射端设备发送所述反馈信号。
作为一种可选的实施方式，在本发明实施例第四方面中，所述第二确定单元根据所述第一SINR，确定反馈信号包括：
将所述第一SINR与所述第二SINR进行比较；
若所述第一SINR大于所述第二SINR，则确定用于表示所述第一SINR相较于所述第二SINR提升的反馈信号；
若所述第一SINR小于或等于所述第二SINR，则确定用于表示所述第一SINR相较于所述第二SINR未提升的反馈信号。
作为一种可选的实施方式，在本发明实施例第四方面中，所述分布式安全波束成型装置还包括：
存储单元，用于将所述第一SINR与所述第二SINR中较大的SINR存储为所述接收端设备第(n+1)时隙的SINR；其中，所述第(n+1)时隙为所述当前时隙的下一个时隙。
与现有技术相比，本发明实施例具备以下有益效果：
本发明实施例中，发射端设备可以接收所述接收端设备发送的反馈信号，所述反馈信号用于表示所述接收端设备在第n时隙的第一信干噪比SINR相较于所述接收端设备存储的第n时隙的第二SINR是否提升；进一步地，发射端设备可以根据所述反馈信号，调整第(n+1)时隙发送第一人工噪声信号的发射权值的相关参数，所述相关参数包括发射相位、修正因子以及随机扰动。可见，实施本发明实施例，发射端设备只需要使用接收端设备发送的反馈信息，就可以对第(n+1)时隙发送第一人工噪声信号的发射权值的相 关参数进行调整，以使所述第一人工噪声信号在所述接收端设备的干扰功率最小，从而能够实现分布式安全通信，同时，提高分布式安全通信系统的保密性能。
附图说明
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是本发明实施例公开的一种分布式安全通信系统的模型示意图；
图2是本发明实施例公开的一种基于反馈控制的分布式安全波束成型方法的流程示意图；
图3是本发明实施例公开的另一种基于反馈控制的分布式安全波束成型方法的流程示意图；
图4是本发明实施例公开的另一种基于反馈控制的分布式安全波束成型方法的流程示意图；
图5是本发明实施例公开的一种分布式安全通信系统的保密容量的收敛示意图；
图6是本发明实施例公开的一种分布式安全波束成型装置的结构示意图；
图7是本发明实施例公开的另一种分布式安全波束成型装置的结构示意图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
需要说明的是，本发明的说明书和权利要求书及上述附图中的术语“第 一”和“第二”等是用于区别不同对象，而不是用于描述特定顺序。此外，术语“包括”和“具有”以及它们任何变形，意图在于覆盖不排他的包含。例如包含了一系列步骤或单元的过程、方法、系统、产品或设备没有限定于已列出的步骤或单元，而是可选地还包括没有列出的步骤或单元，或可选地还包括对于这些过程、方法、产品或设备固有的其它步骤或单元。
本发明实施例公开了一种基于反馈控制的分布式安全波束成型方法及装置，能够实现分布式安全通信，同时，提高分布式安全通信系统的保密性能。以下进行结合附图进行详细描述。
请参阅图1，图1是本发明实施例公开的一种分布式安全通信系统的模型示意图。如图1所示，该分布式安全通信系统包括多个发射端设备Si(i＝1，2,3....N，且N为正整数)、接收端设备D以及窃听端设备E。其中，每个发射端设备Si与接收端设备D装备单天线，窃听端设备E装备多天线。
其中，发射端设备Si主要用于收发信号，比如发送人工噪声信号以及接收反馈信号等，该发射端设备Si可以为基站。基站(例如接入点)可以是指接入网中在空中接口上通过一个或多个扇区与无线终端通信的设备。基站可用于将收到的空中帧与IP分组进行相互转换，作为无线终端与接入网的其余部分之间的路由器，其中，接入网的其余部分可包括网际协议(IP)网络。基站还可以协调对空中接口的属性管理。例如，基站可以是GSM或CDMA中的基站(BTS，Base Transceiver Station)，也可以是WCDMA中的基站(NodeB)，还可以是LTE中的演进型基站(NodeB或eNB或e-NodeB，evolutional Node B)，本发明实施例不做限定。
其中，接收端设备D主要用于收发信号，比如发送人工噪声信号以及接收有用信号等，该目标端设备D可以为基站。
其中，窃听设备E主要用于监听发射端设备Si发送给接收端设备D的信号，以及监听接收端设备D发送给发射端设备Si的信号，并根据接收到的信号调整自身的波束成型器，该窃听设备E可以包括但不限于基站、用户设备、通信车等。
在图1所示的分布式安全通信系统中，接收端设备D的坐标表示为(0,rD)，窃听端设备E的坐标表示为(rE sinθE,rE cosθE)，其中θE表示在图1所示的坐标下，窃听端设备E与y轴之间的夹角。N个已经经过频率同步的分布式发射端设备随机分布在半径为rS的圆中，同时这些发射端设备的分布规律符合均匀分布，即每一个分布式发射端设备在圆中任一位置出现的概率相同。其中，第i个发射端设备Si(i＝1,2,K,N)的坐标可以表示为
Figure PCTCN2017091913-appb-000032
因此，第i个发射端设备到接收端设备D的自由空间路径损耗为
Figure PCTCN2017091913-appb-000033
式中λ表示载波波长，
Figure PCTCN2017091913-appb-000034
表示第i个发射端设备到接收端设备D的距离。
Figure PCTCN2017091913-appb-000035
表示第i个发射端设备到接收端设备D的信道衰落。
Figure PCTCN2017091913-appb-000036
表示第i个发射端设备到窃听端设备E的自由空间路径损耗，式中
Figure PCTCN2017091913-appb-000037
表示第i个发射端设备到窃听端设备E的距离，
Figure PCTCN2017091913-appb-000038
表示第i个发射端设备到窃听端设备E的信道衰落。LDE＝λ/4πdDE表示接收端设备D与窃听端设备E之间的自由空间路径损耗，
Figure PCTCN2017091913-appb-000039
则表示接收端设备D与窃听端设备E之间的距离。hDE则表示接收端设备D与窃听端设备E之间的信道衰落。类似于以上的定义方法，
Figure PCTCN2017091913-appb-000040
分别表示接收端设备D在发送反馈信号时与第i个发射端设备间的自由空间路径损耗、距离以及信道衰落。
其中，任一分布式发射端设备Si(i＝1,2,K,N)与接收端设备D都装备全向单天线，窃听端设备E上则装备了多天线阵列以获取更多的信道方向信息，从而提升窃听端设备E自身的窃听容量，例如通过估计分布式发射端设备与接收端设备D之间的到达角(Direction of Arrival)以设计自身的波束成型器。
在图1所示的分布式安全通信系统中，发射端设备可以接收所述接收端设备发送的反馈信号，所述反馈信号用于表示所述接收端设备在第n时隙的第一信干噪比SINR相较于所述接收端设备存储的第n时隙的第二SINR是否提升；进一步地，发射端设备可以根据所述反馈信号，调整第(n+1)时 隙发送第一人工噪声信号的发射权值的相关参数，以使所述第三人工噪声信号在所述接收端设备的干扰功率最小，从而可以提高分布式安全通信系统的安全性。
请参阅图2，图2是本发明实施例公开的一种基于反馈控制的分布式安全波束成型方法的流程示意图。其中，该基于反馈控制的分布式安全波束成型方法应用于分布式安全通信系统包括的发射端设备，如图2所示，该基于反馈控制的分布式安全波束成型方法可以包括以下步骤：
步骤201、发射端设备接收所述接收端设备发送的反馈信号。
其中，所述反馈信号用于表示所述接收端设备在第n时隙的第一信干噪比SINR相较于所述接收端设备存储的第n时隙的第二SINR是否提升。所述第n时隙为当前时隙，所述n为正整数。
作为一种可选的实施方式，在步骤201之前，发射端设备还可以在第n时隙向所述接收端设备发送携带有第二人工噪声信号的第一信号。其中，所述第二人工噪声信号用于干扰所述窃听端设备对第一信道方向信息的估计准确度。
发射端设备在第n时隙向所述接收端设备发送携带有第二人工噪声信号的第一信号可以表示为：
Figure PCTCN2017091913-appb-000041
其中，xC[n]表示第n个时隙内发送的保密信息，每一个分布式发射端设备在每个时隙内发送的保密信息是相同的，
Figure PCTCN2017091913-appb-000042
表示第i个分布式发射端设备发送保密信息的功率，
Figure PCTCN2017091913-appb-000043
表示第i个分布式发射端设备发送的第一人造噪声信号，它服从均值为0，方差为1的高斯分布，
Figure PCTCN2017091913-appb-000044
表示第i个发射端设备发送第二人造噪声
Figure PCTCN2017091913-appb-000045
的功率。其中，所有分布式发射端设备在每一个时隙内发送保密信息xC[n]的功率相同，发送第二人造噪声ξS,i[n]的功率相同，且它们满足如下条件：
Figure PCTCN2017091913-appb-000046
其中PT表示每一个分布式发射端设备发送保密信息xC[n]与第二人造噪声ξS,i[n]功率之和的上限。
Figure PCTCN2017091913-appb-000047
表示第i个分布式发射端设备发送第二人造噪声ξS,i[n]的发射权值。当对每一个分布式发射端设备的发射相位进行优化时，该发射权值可表示为
Figure PCTCN2017091913-appb-000048
其中，该发射权值
Figure PCTCN2017091913-appb-000049
的自适应组件
Figure PCTCN2017091913-appb-000050
即包括三个参数，发射相位
Figure PCTCN2017091913-appb-000051
修正因子
Figure PCTCN2017091913-appb-000052
以及随机扰动
Figure PCTCN2017091913-appb-000053
第i个发射端设备Si(i＝1,2,K,N)生成的随机扰动
Figure PCTCN2017091913-appb-000054
其中，
Figure PCTCN2017091913-appb-000055
为扰动步长。初始化时，第i个发射端设备在第1个时隙时的最佳发射相位
Figure PCTCN2017091913-appb-000056
修正因子
Figure PCTCN2017091913-appb-000057
本发明的实施例中，所述接收端设备接收到多个发射端设备发送的第一信号之后，就可以根据该第一信号向发射端设备发送反馈信息，其中，第i个分布式发射端设备Si接收到的反馈信号可以表示为：
Figure PCTCN2017091913-appb-000058
其中，xD[n]为接收端设备确定的反馈信号，
Figure PCTCN2017091913-appb-000059
PC2表示接收端设备D反馈单比特控制信息xB[n]的发射功率，Pξ2表示接收端设备D发射第二人工噪声信号ξD[n]的功率，ξD[n]～CN(0,1)。
Figure PCTCN2017091913-appb-000060
表示接收端设备D与第i个分布式发射端设备Si之间的未知相位，它服从[0,2π)间的均匀分布，
Figure PCTCN2017091913-appb-000061
表示接收端设备D与第i个分布式发射端设备Si之间反馈控制信息时信道的相位响应，
Figure PCTCN2017091913-appb-000062
表示第i个分布式发射端设备上的加性高斯白噪声。
步骤202、若所述反馈信号用于表示所述接收端设备在第n时隙的第一SINR相较于所述接收端设备存储的第n时隙的第二SINR提升，发射端设备 确定
Figure PCTCN2017091913-appb-000063
其中，
Figure PCTCN2017091913-appb-000064
为第(n+1)时隙发送所述第一人工噪声信号的发射权值的发射相位，
Figure PCTCN2017091913-appb-000065
为第(n+1)时隙发送所述第一人工噪声信号的发射权值的修正因子，
Figure PCTCN2017091913-appb-000066
为第n时隙发送第二人工噪声信号的发射权值的发射相位，
Figure PCTCN2017091913-appb-000067
为第n时隙发送所述第二人工噪声信号的发射权值的修正因子，
Figure PCTCN2017091913-appb-000068
为第n时隙发送所述第二人工噪声信号的发射权值的随机扰动。
步骤203、发射端设备将所述发射端设备上的正反馈计数器的个数累加1。
其中，第i个发射端设备Si(i＝1,2,K,N)根据如下公式对其扰动步长
Figure PCTCN2017091913-appb-000069
进行更新：
Figure PCTCN2017091913-appb-000070
其中
Figure PCTCN2017091913-appb-000071
表示第i个发射端设备Si(i＝1,2,K,N)上的正反馈计数器(在第1个时隙，初始值
Figure PCTCN2017091913-appb-000072
)，
Figure PCTCN2017091913-appb-000073
可以将正确的随机扰动的个数记录下来，
Figure PCTCN2017091913-appb-000074
表示第i个发射端设备Si(i＝1,2,K,N)对应于正反馈计数器
Figure PCTCN2017091913-appb-000075
的阈值。正确的随机扰动意味着所有发射端设备发射的人工噪声信号在接收端设备上的干扰功率下降。
Figure PCTCN2017091913-appb-000076
表示第i个发射端设备Si(i＝1,2,K,N)上随机扰动步长
Figure PCTCN2017091913-appb-000077
的增长因子，在第1个时隙设定好后不再改变。第i个发射端设备Si(i＝1,2,K,N)上的阈值
Figure PCTCN2017091913-appb-000078
按照如下规则进行更新：
Figure PCTCN2017091913-appb-000079
其中，
Figure PCTCN2017091913-appb-000080
表示第i个发射端设备Si(i＝1,2,K,N)上阈值
Figure PCTCN2017091913-appb-000081
的修正因子，在第1个时隙设定好后不再改变，它可以通过修正阈值
Figure PCTCN2017091913-appb-000082
避免扰动步长
Figure PCTCN2017091913-appb-000083
过快增长。
步骤204、若累加后的正反馈计数器的个数大于或等于第一累加阈值，发射端设备确定
Figure PCTCN2017091913-appb-000084
其中，
Figure PCTCN2017091913-appb-000085
为第(n+1)时隙发送所述第一人工噪声信号的发射权值的随机扰动，
Figure PCTCN2017091913-appb-000086
为随机扰动步长
Figure PCTCN2017091913-appb-000087
的增长因子。
其中，在所述反馈信号用于表示所述接收端设备在第n时隙的第一SINR相较于所述接收端设备存储的第n时隙的第二SINR提升，且累加后的正反馈计数器的个数大于或等于第一累加阈值的情况下，发射端设备才需要更新并确定
Figure PCTCN2017091913-appb-000088
反之，在所述反馈信号用于表示所述接收端设备在第n时隙的第一SINR相较于所述接收端设备存储的第n时隙的第二SINR提升，且累加后的正反馈计数器的个数小于第一累加阈值，发射端设备不需要更新并确定
Figure PCTCN2017091913-appb-000089
需要说明的是，对于正反馈计数器，是累加正反馈，如果两个正反馈之间出现了一个负反馈，打断了正反馈，正反馈计数器是不清0的。
步骤205、发射端设备保存第n时隙发送所述第二人工噪声信号的发射权值的随机扰动，并结束本流程。
本发明实施例中，在所述反馈信号用于表示所述接收端设备在第n时隙的第一SINR相较于所述接收端设备存储的第n时隙的第二SINR提升的情况下，发射端设备需要保存第n时隙发送所述第二人工噪声信号的发射权值的随机扰动，以为在第(n+1)时隙更新修正因子做准备。
步骤206、若所述反馈信号用于表示所述接收端设备在第n时隙的第一SINR相较于所述接收端设备存储的第n时隙的第二SINR未提升，发射端设备确定
Figure PCTCN2017091913-appb-000090
步骤207、发射端设备将所述发射端设备上的负反馈计数器的个数累加1。
其中，为了所有发射端设备发射的人工噪声信号在接收端设备上的收敛准确度，需要适当的减小每一个发射端设备的扰动步长
Figure PCTCN2017091913-appb-000091
其中，第i个发射端设备Si(i＝1,2,K,N)根据如下公式对其扰动步长
Figure PCTCN2017091913-appb-000092
进行更新：
Figure PCTCN2017091913-appb-000093
其中，
Figure PCTCN2017091913-appb-000094
表示第i个发射端设备Si(i＝1,2,K,N)上的负反馈计数器(在第1个时隙的初始值
Figure PCTCN2017091913-appb-000095
)，
Figure PCTCN2017091913-appb-000096
表示第i个发射端设备Si(i＝1,2,K,N)对应于负反馈计数器
Figure PCTCN2017091913-appb-000097
的阈值，
Figure PCTCN2017091913-appb-000098
表示第i个分布式发射节点Si(i＝1,2,K,N)上随机扰动步长
Figure PCTCN2017091913-appb-000099
的下降因子，在第1个时隙设定好后不再改变。当第i个发射端设备Si(i＝1,2,K,N)的负反馈计数器
Figure PCTCN2017091913-appb-000100
达到其对应的阈值
Figure PCTCN2017091913-appb-000101
时，第i个发射端设备Si(i＝1,2,K,N)的第二累加阈值
Figure PCTCN2017091913-appb-000102
将按照如下公式进行更新：
Figure PCTCN2017091913-appb-000103
其中
Figure PCTCN2017091913-appb-000104
表示第i个分布式发射节点Si(i＝1,2,K,N)上第二累加阈值
Figure PCTCN2017091913-appb-000105
的修正因子，在第1个时隙设定好后不再改变，它可以通过修正阈值
Figure PCTCN2017091913-appb-000106
来减小第i个发射端设备Si(i＝1,2,K,N)上的随机扰动步长
Figure PCTCN2017091913-appb-000107
使得所有发射端设备协作发射的人工噪声信号在接收端设备上获得更好的收敛准确度。
步骤208、若累加后的负反馈计数器的个数大于或等于第二累加阈值，发射端设备确定
Figure PCTCN2017091913-appb-000108
其中，在所述反馈信号用于表示所述接收端设备在第n时隙的第一SINR相较于所述接收端设备存储的第n时隙的第二SINR未提升，且累加后的负反馈计数器的个数大于或等于第二累加阈值的情况下，发射端设备才需要更新并确定
Figure PCTCN2017091913-appb-000109
反之，在所述反馈信号用于表示所述接收端设备在第n时隙的第一SINR相较于所述接收端设备存储的第n时隙的第二SINR未提升，且累加后的负反馈计数器的个数小于第二累加阈值的情况下， 发射端设备不需要更新并确定
Figure PCTCN2017091913-appb-000110
需要说明的是，对于负反馈计数器，是连续负反馈，如果负反馈后被一个正反馈打断了，负反馈计数器要清0。
其中，实施图2所描述的方法，发射端设备可以接收所述接收端设备发送的反馈信号，所述反馈信号用于表示所述接收端设备在第n时隙的第一信干噪比SINR相较于所述接收端设备存储的第n时隙的第二SINR是否提升；进一步地，发射端设备可以根据所述反馈信号，调整第(n+1)时隙发送第一人工噪声信号的发射权值的发射相位、修正因子以及随机扰动，以使所述第三人工噪声信号在所述接收端设备的干扰功率最小，从而可以提高分布式安全通信系统的安全性。
请参阅图3，图3是本发明实施例公开的另一种基于反馈控制的分布式安全波束成型方法的流程示意图。其中，该基于反馈控制的分布式安全波束成型方法应用于分布式安全通信系统包括的接收端设备，如图3所示，该基于反馈控制的分布式安全波束成型方法可以包括以下步骤：
步骤301、接收端设备在第n时隙接收多个所述发射端设备发送的第一信号。
其中，所述n为所述第n时隙为当前时隙，所述n为正整数。
本发明实施例中，接收端设备在第n时隙接收多个所述发射端设备发送的第一信号，可以表示为
Figure PCTCN2017091913-appb-000111
其中
Figure PCTCN2017091913-appb-000112
表示接收端D上的加性高斯白噪声(Additive White Gaussian Noise)，
Figure PCTCN2017091913-appb-000113
表示第i个分布式发射节点Si与接收端D之间的未知相位，它服从[0,2π)间的均匀分布，
Figure PCTCN2017091913-appb-000114
表示第i个发射节点Si与接收端D之间第一阶段信道的相位响应。
步骤302、接收端设备根据所述第一信号，确定在第n时隙的第一信干噪比SINR。
其中，接收端设备在第n时隙的信干噪比可表示为：
Figure PCTCN2017091913-appb-000115
第n时隙发射端设备与接收端设备之间的互信息量RD[n]可以表示为：
RD[n]＝log2(1+SINRD[n])
接收端设备D上的安全容量RS[n]可以表示为：
RS[n]＝[RD[n]-RE[n]]+
其中，[x]+□max{0,x}，即保证接收端设备D上可实现的安全容量RS≥0。
步骤303、接收端设备根据所述第一SINR，确定反馈信号。
其中，所述反馈信号用于表示所述接收端设备在第n时隙的第一信干噪比SINR相较于所述接收端设备存储的第n时隙的第二SINR是否提升；
所述接收端设备根据所述第一SINR，确定反馈信号包括：
将所述第一SINR与所述第二SINR进行比较；
若所述第一SINR大于所述第二SINR，则确定用于表示所述第一SINR相较于所述第二SINR提升的反馈信号；
若所述第一SINR小于或等于所述第二SINR，则确定用于表示所述第一SINR相较于所述第二SINR未提升的反馈信号。
具体的，接收端设备确定的反馈信号可以表示为：
Figure PCTCN2017091913-appb-000116
其中PC2表示接收端设备D反馈单比特控制信息xB[n]的发射功率，Pξ2表示接收端设备D发射第三人工噪声信号ξD[n]的功率，ξD[n]～CN(0,1)。
例如，可以用比特1表示所述第一SINR相较于所述第二SINR提升，并称其为单比特正反馈，用比特0表示所述第一SINR相较于所述第二SINR未提升，并称其为单比特负反馈。其中，接收端设备只需要反馈单比特控制信息，能够节省网络资源。
步骤304、接收端设备向多个所述发射端设备发送所述反馈信号。
步骤305、接收端设备将所述第一SINR与所述第二SINR中较大的SINR存储为所述接收端设备第(n+1)时隙的SINR。
其中，所述第(n+1)时隙为所述当前时隙的下一个时隙。
其中，实施图3所描述的方法，接收端设备可以在第n时隙接收多个所述发射端设备发送的第一信号；根据所述第一信号，确定在第n时隙的第一信干噪比SINR；以及根据所述第一SINR，确定反馈信号之后，向多个所述发射端设备发送所述反馈信号，这样，发射端设备就可以根据反馈信号调整第(n+1)时隙发送第一人工噪声信号的发射权值的发射相位、修正因子以及随机扰动，从而能够实现分布式安全通信，同时，提高分布式安全通信系统的保密性能。
请参阅图4，图4是本发明实施例公开的另一种基于反馈控制的分布式安全波束成型方法的流程示意图；其中，该基于反馈控制的分布式安全波束成型方法是从发射端设备以及接收端设备两侧来描述的，图4中的部分或全部步骤可以参照图2或图3中的描述，在此不再赘述。如图4所示，该基于反馈控制的分布式安全波束成型方法可以包括以下步骤：
步骤401、发射端设备在第n时隙向接收端设备发送第一信号。
步骤402、接收端设备根据所述第一信号，确定在第n时隙的第一信干噪比SINR。
步骤403、接收端设备根据所述第一SINR，确定反馈信号。
步骤404、接收端设备向多个所述发射端设备发送所述反馈信号。
步骤405、发射端设备根据所述反馈信号，调整第(n+1)时隙发送第一人工噪声信号的发射权值的发射相位、修正因子以及随机扰动。
请一并参见图5，图5是本发明实施例公开的一种分布式安全通信系统的保密容量的收敛示意图；如图5所示，分布式安全通信系统的保密容量在迭代结束后明显提升，且发射端设备的个数越多，分布式安全通信系统的保密容量越高。
其中，实施图4所描述的基于反馈控制的分布式安全波束成型方法，发 射端设备可以在第n时隙向接收端设备发送第一信号，接收端设备根据所述第一信号，确定在第n时隙的第一信干噪比SINR，并根据所述第一SINR，确定反馈信号，并向多个所述发射端设备发送所述反馈信号，发射端设备就可以根据所述反馈信号，调整第(n+1)时隙发送第一人工噪声信号的发射权值的发射相位、修正因子以及随机扰动，以使所述第三人工噪声信号在所述接收端设备的干扰功率最小，从而可以提高分布式安全通信系统的安全性。
请参阅图6，图6是本发明实施例公开的一种分布式安全波束成型装置的结构示意图。其中，图6所描述的分布式安全波束成型装置可以行于分布式安全通信系统包括的发射端设备，图6所描述的分布式安全波束成型装置可以用于执行图2或图4所描述的基于反馈控制的分布式安全波束成型方法中的部分或全部步骤，具体请参见图2或图4中的相关描述，在此不再赘述。如图6所示，该分布式安全波束成型装置可以包括：
接收单元601，用于接收所述接收端设备发送的反馈信号，所述反馈信号用于表示所述接收端设备在第n时隙的第一信干噪比SINR相较于所述接收端设备存储的第n时隙的第二SINR是否提升；
调整单元602，用于根据所述反馈信号，调整第(n+1)时隙发送第一人工噪声信号的发射权值的相关参数，所述相关参数包括发射相位、修正因子以及随机扰动；
其中，所述第n时隙为当前时隙，所述第(n+1)时隙为所述当前时隙的下一个时隙，所述n为正整数。
可选的，所述调整单元602包括：
第一确定子单元6021，用于若所述反馈信号用于表示所述接收端设备在第n时隙的第一SINR相较于所述接收端设备存储的第n时隙的第二SINR提升，确定
Figure PCTCN2017091913-appb-000117
第二确定子单元6022，用于若所述反馈信号用于表示所述接收端设备在第n时隙的第一SINR相较于所述接收端设备存储的第n时隙的第二SINR未提升，确定
Figure PCTCN2017091913-appb-000118
其中，
Figure PCTCN2017091913-appb-000119
为第(n+1)时隙发送所述第一人工噪声信号的发射权值的发射相位，
Figure PCTCN2017091913-appb-000120
为第(n+1)时隙发送所述第一人工噪声信号的发射权值的修正因子，
Figure PCTCN2017091913-appb-000121
为第(n+1)时隙发送所述第一人工噪声信号的发射权值的随机扰动，
Figure PCTCN2017091913-appb-000122
为第n时隙发送第二人工噪声信号的发射权值的发射相位，
Figure PCTCN2017091913-appb-000123
为第n时隙发送所述第二人工噪声信号的发射权值的修正因子，
Figure PCTCN2017091913-appb-000124
为第n时隙发送所述第二人工噪声信号的发射权值的随机扰动，
Figure PCTCN2017091913-appb-000125
为随机扰动步长
Figure PCTCN2017091913-appb-000126
的增长因子，
Figure PCTCN2017091913-appb-000127
为随机扰动步长
Figure PCTCN2017091913-appb-000128
的下降因子。
可选的，所述分布式安全波束成型装置还包括：
第一计数单元603，用于若所述反馈信号用于表示所述接收端设备在第n时隙的第一SINR相较于所述接收端设备存储的第n时隙的第二SINR提升，将所述发射端设备上的正反馈计数器的个数累加1；
所述第一确定子单元6021确定
Figure PCTCN2017091913-appb-000129
的方式具体为：
若累加后的正反馈计数器的个数大于或等于第一累加阈值，确定
Figure PCTCN2017091913-appb-000130
可选的，所述分布式安全波束成型装置还包括：
第二计数单元604，用于若所述反馈信号用于表示所述接收端设备在第n时隙的第一SINR相较于所述接收端设备存储的第n时隙的第二SINR未提升，将所述发射端设备上的负反馈计数器的个数累加1；
所述第二确定子单元6022确定
Figure PCTCN2017091913-appb-000131
的方式具体为：
若累加后的负反馈计数器的个数大于或等于第二累加阈值，则执行所述 的确定
Figure PCTCN2017091913-appb-000132
可选的，所述分布式安全波束成型装置还包括：
保存单元605，用于保存第n时隙发送所述第二人工噪声信号的发射权值的随机扰动。
在图6所述的分布式安全波束成型装置中，发射端设备可以接收所述接收端设备发送的反馈信号，所述反馈信号用于表示所述接收端设备在第n时隙的第一信干噪比SINR相较于所述接收端设备存储的第n时隙的第二SINR是否提升；进一步地，发射端设备可以根据所述反馈信号，调整第(n+1)时隙发送第一人工噪声信号的发射权值的相关参数，所述相关参数包括发射相位、修正因子以及随机扰动。可见，实施本发明实施例，发射端设备只需要使用接收端设备发送的反馈信息，就可以对第(n+1)时隙发送第一人工噪声信号的发射权值的相关参数进行调整，以使所述第一人工噪声信号在所述接收端设备的干扰功率最小，从而能够实现分布式安全通信，同时，提高分布式安全通信系统的保密性能。
请参阅图7，图7是本发明实施例公开的另一种分布式安全波束成型装置的结构示意图。其中，图7所描述的分布式安全波束成型装置运行于分布式安全通信系统包括的接收端设备，图7所描述的分布式安全波束成型装置可以用于执行图3或图4所描述的基于反馈控制的分布式安全波束成型方法中的部分或全部步骤，具体请参见图3或图4中的相关描述，在此不再赘述。如图7所示，该分布式安全波束成型装置可以包括：
发送单元701，用于在第n时隙接收多个所述发射端设备发送的第一信号；其中，所述n为所述第n时隙为当前时隙，所述n为正整数。
第一确定单元702，用于根据所述第一信号，确定在第n时隙的第一信 干噪比SINR；
第二确定单元703，用于根据所述第一SINR，确定反馈信号，所述反馈信号用于表示所述接收端设备在第n时隙的第一信干噪比SINR相较于所述接收端设备存储的第n时隙的第二SINR是否提升；
所述发送单元701，还用于向多个所述发射端设备发送所述反馈信号。
可选的，所述第二确定单元703根据所述第一SINR，确定反馈信号包括：
将所述第一SINR与所述第二SINR进行比较；
若所述第一SINR大于所述第二SINR，则确定用于表示所述第一SINR相较于所述第二SINR提升的反馈信号；
若所述第一SINR小于或等于所述第二SINR，则确定用于表示所述第一SINR相较于所述第二SINR未提升的反馈信号。
可选的，所述分布式安全波束成型装置还包括：
存储单元704，用于将所述第一SINR与所述第二SINR中较大的SINR存储为所述接收端设备第(n+1)时隙的SINR；其中，所述第(n+1)时隙为所述当前时隙的下一个时隙。
在图7所描述的分布式安全波束成型装置中，接收端设备可以在第n时隙接收多个所述发射端设备发送的第一信号；根据所述第一信号，确定在第n时隙的第一信干噪比SINR；以及根据所述第一SINR，确定反馈信号之后，向多个所述发射端设备发送所述反馈信号，这样，发射端设备就可以根据反馈信号调整第(n+1)时隙发送第一人工噪声信号的发射权值的发射相位、修正因子以及随机扰动，从而能够实现分布式安全通信，同时，提高分布式安全通信系统的保密性能。
在上述实施例中，对各个实施例的描述都各有侧重，某个实施例中没有详述的部分，可以参见其他实施例的相关描述。
在本申请所提供的几个实施例中，应该理解到，所揭露的装置，可通过 其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如所述单元的划分，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例方案的目的。
另外，在本发明各个实施例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器中。基于这样的理解，本发明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器中，包括若干指令用以使得一台计算机设备(可为个人计算机、服务器或者网络设备等)执行本发明各个实施例所述方法的全部或部分步骤。而前述的存储器包括：U盘、只读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、移动硬盘、磁碟或者光盘等各种可以存储程序代码的介质。
本领域普通技术人员可以理解上述实施例的各种方法中的全部或部分步骤是可以通过程序来指令相关的硬件来完成，该程序可以存储于一计算机可读存储器中，存储器可以包括：闪存盘、只读存储器(英文：Read-Only Memory，简称：ROM)、随机存取器(英文：Random Access Memory，简称：RAM)、磁盘或光盘等。
以上对本发明实施例公开的一种基于反馈控制的分布式安全波束成型方法及装置进行了详细介绍，本文中应用了具体个例对本发明的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本发明的方法及其核心思想；同时，对于本领域的一般技术人员，依据本发明的思想，在具体实施方式及应用范围上均会有改变之处，综上所述，本说明书内容不应理解为对本发明的限制。

Claims (10)

  1. 一种基于反馈控制的分布式安全波束成型方法，其特征在于，应用于分布式安全通信系统包括的发射端设备，所述分布式安全通信系统包括多个所述发射端设备、接收端设备以及窃听端设备，所述方法包括：
    接收所述接收端设备发送的反馈信号，所述反馈信号用于表示所述接收端设备在第n时隙的第一信干噪比SINR相较于所述接收端设备存储的第n时隙的第二SINR是否提升；
    根据所述反馈信号，调整第(n+1)时隙发送第一人工噪声信号的发射权值的相关参数，所述相关参数包括发射相位、修正因子以及随机扰动；
    其中，所述第n时隙为当前时隙，所述第(n+1)时隙为所述当前时隙的下一个时隙，所述n为正整数。
  2. 根据权利要求1所述的方法，其特征在于，所述根据所述反馈信号，调整第(n+1)时隙发送第一人工噪声信号的发射权值的相关参数包括：
    若所述反馈信号用于表示所述接收端设备在第n时隙的第一SINR相较于所述接收端设备存储的第n时隙的第二SINR提升，确定
    Figure PCTCN2017091913-appb-100001
    若所述反馈信号用于表示所述接收端设备在第n时隙的第一SINR相较于所述接收端设备存储的第n时隙的第二SINR未提升，确定
    Figure PCTCN2017091913-appb-100002
    Figure PCTCN2017091913-appb-100003
    其中，
    Figure PCTCN2017091913-appb-100004
    为第(n+1)时隙发送所述第一人工噪声信号的发射权值的发射相位，
    Figure PCTCN2017091913-appb-100005
    为第(n+1)时隙发送所述第一人工噪声信号的发射权值的修正因子，
    Figure PCTCN2017091913-appb-100006
    为第(n+1)时隙发送所述第一人工噪声信号的发射权值的随机扰动，
    Figure PCTCN2017091913-appb-100007
    为第n时隙发送第二人工噪声信号的发射权值的发射相位，
    Figure PCTCN2017091913-appb-100008
    为第n时隙发送所述第二人工噪声信号的发射权值的修正因子，
    Figure PCTCN2017091913-appb-100009
    为第n时隙发送所述第二人工噪声信号的发射权值的随机扰动，
    Figure PCTCN2017091913-appb-100010
    为 随机扰动步长
    Figure PCTCN2017091913-appb-100011
    的增长因子，
    Figure PCTCN2017091913-appb-100012
    为随机扰动步长
    Figure PCTCN2017091913-appb-100013
    的下降因子。
  3. 根据权利要求2所述的方法，其特征在于，所述方法还包括：
    若所述反馈信号用于表示所述接收端设备在第n时隙的第一SINR相较于所述接收端设备存储的第n时隙的第二SINR提升，将所述发射端设备上的正反馈计数器的个数累加1；
    若累加后的正反馈计数器的个数大于或等于第一累加阈值，则执行所述的确定
    Figure PCTCN2017091913-appb-100014
  4. 根据权利要求2所述的方法，其特征在于，所述方法还包括：
    若所述反馈信号用于表示所述接收端设备在第n时隙的第一SINR相较于所述接收端设备存储的第n时隙的第二SINR未提升，将所述发射端设备上的负反馈计数器的个数累加1；
    若累加后的负反馈计数器的个数大于或等于第二累加阈值，则执行所述的确定
    Figure PCTCN2017091913-appb-100015
  5. 根据权利要求3所述的方法，其特征在于，所述方法还包括：
    保存第n时隙发送所述第二人工噪声信号的发射权值的随机扰动。
  6. 一种分布式安全波束成型装置，其特征在于，运行于分布式安全通信系统包括的发射端设备，包括：
    接收单元，用于接收所述接收端设备发送的反馈信号，所述反馈信号用于表示所述接收端设备在第n时隙的第一信干噪比SINR相较于所述接收端设备存储的第n时隙的第二SINR是否提升；
    调整单元，用于根据所述反馈信号，调整第(n+1)时隙发送第一人工噪声信号的发射权值的相关参数，所述相关参数包括发射相位、修正因子以及随机扰动；
    其中，所述第n时隙为当前时隙，所述第(n+1)时隙为所述当前时隙 的下一个时隙，所述n为正整数。
  7. 根据权利要求6所述的分布式安全波束成型装置，其特征在于，所述调整单元包括：
    第一确定子单元，用于若所述反馈信号用于表示所述接收端设备在第n时隙的第一SINR相较于所述接收端设备存储的第n时隙的第二SINR提升，确定
    Figure PCTCN2017091913-appb-100016
    第二确定子单元，用于若所述反馈信号用于表示所述接收端设备在第n时隙的第一SINR相较于所述接收端设备存储的第n时隙的第二SINR未提升，确定
    Figure PCTCN2017091913-appb-100017
    其中，
    Figure PCTCN2017091913-appb-100018
    为第(n+1)时隙发送所述第一人工噪声信号的发射权值的发射相位，
    Figure PCTCN2017091913-appb-100019
    为第(n+1)时隙发送所述第一人工噪声信号的发射权值的修正因子，
    Figure PCTCN2017091913-appb-100020
    为第(n+1)时隙发送所述第一人工噪声信号的发射权值的随机扰动，
    Figure PCTCN2017091913-appb-100021
    为第n时隙发送第二人工噪声信号的发射权值的发射相位，
    Figure PCTCN2017091913-appb-100022
    为第n时隙发送所述第二人工噪声信号的发射权值的修正因子，
    Figure PCTCN2017091913-appb-100023
    为第n时隙发送所述第二人工噪声信号的发射权值的随机扰动，
    Figure PCTCN2017091913-appb-100024
    为随机扰动步长
    Figure PCTCN2017091913-appb-100025
    的增长因子，
    Figure PCTCN2017091913-appb-100026
    为随机扰动步长
    Figure PCTCN2017091913-appb-100027
    的下降因子。
  8. 根据权利要求7所述的分布式安全波束成型装置，其特征在于，所述分布式安全波束成型装置还包括：
    第一计数单元，用于若所述反馈信号用于表示所述接收端设备在第n时隙的第一SINR相较于所述接收端设备存储的第n时隙的第二SINR提升，将所述发射端设备上的正反馈计数器的个数累加1；
    所述第一确定子单元确定
    Figure PCTCN2017091913-appb-100028
    的方式具体为：
    若累加后的正反馈计数器的个数大于或等于第一累加阈值，确定
    Figure PCTCN2017091913-appb-100029
  9. 根据权利要求8所述的分布式安全波束成型装置，其特征在于，所述分布式安全波束成型装置还包括：
    第二计数单元，用于若所述反馈信号用于表示所述接收端设备在第n时隙的第一SINR相较于所述接收端设备存储的第n时隙的第二SINR未提升，将所述发射端设备上的负反馈计数器的个数累加1；
    所述第二确定子单元确定
    Figure PCTCN2017091913-appb-100030
    的方式具体为：
    若累加后的负反馈计数器的个数大于或等于第二累加阈值，则执行所述的确定
    Figure PCTCN2017091913-appb-100031
  10. 根据权利要求9所述的分布式安全波束成型装置，其特征在于，所述分布式安全波束成型装置还包括：
    保存单元，用于保存第n时隙发送所述第二人工噪声信号的发射权值的随机扰动。
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