A modulation method based on multi-frequency logarithmic frequency control array
A modulation method and frequency-controlled array technology, applied in diversity/multi-antenna systems, space transmit diversity, electrical components, etc., can solve the problems of good eavesdropping effect, technical ineffectiveness, etc., and achieve good bit error rate and security capacity performance. Effect
Active Publication Date: 2022-01-07
UNIV OF ELECTRONICS SCI & TECH OF CHINA +1
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Problems solved by technology
The traditional Orthogonal Artificial Noise (OAN)-assisted phased array (Phased Array, PA) directional modulation technology has been widely studied as a new type of sender modulation physical layer security technology. However, this technology has the following disadvantages: A problem: (1) When the eavesdropping party and the legal receiver have the same angle information, the technology is useless; (2) The eavesdropping party can obtain a good eavesdropping effect at the power leakage point close to the legal receiver
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[0028] Below in conjunction with accompanying drawing and simulation example, to prove effectiveness and practicality of the present invention:
[0029] Concrete implementation method of the present invention is divided into following several steps:
[0030] Step 1: Determine the parameters of the system to be selected, including the number of transmitting antenna array elements M, the frequency of each element N, and the carrier center frequency f 0 , frequency offset Δf; position information (angle, distance) of legal receiver Bob: (θ B , R B ); modulation method; power allocation factor β.
[0031] Step 2: Calculate the steering vector of the legal receiver Bob according to the system parameters in Step 1
[0032]
[0033] where c=3×10 8 m / s is the speed of light, λ≈c / f 0 is the wavelength, d=λ / 2 is the array element spacing, and takes half the wavelength.
[0034] Step 3: Determine the beamforming vector w and WAN projection matrix v of the sender according to t...
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The invention belongs to the technical field of wireless communication physical layer security, and specifically relates to a modulation method based on a multi-frequency logarithmic frequency control array. In order to overcome the problem of power leakage in the traditional DM method, the present invention introduces WAN to replace the traditional OAN to perform fixed-point interference on the power leakage point near the legal receiver, and proposes a multi-frequency logarithmic frequency control array assisted by artificial noise based on water injection power distribution Directional Modulation Method (MFDA‑DM‑WAN), thus enabling secure transmission in a two-dimensional plane. The present invention designs a novel artificial noise technology based on water injection power distribution based on the multi-frequency logarithmic frequency control array to perform fixed-point disturbance on the power leakage point near the legal receiver. The simulation results show that: compared with the traditional orthogonal domain artificial noise scheme, the artificial noise water injection power distribution scheme proposed by the present invention brings great challenges to the eavesdropper and has better bit error rate and secrecy capacity performance.
Description
technical field [0001] The invention belongs to the technical field of wireless communication physical layer security, and relates to Directional Modulation (DM) technology, Water-filling Algorithm of Power Allocation for Artificial Noise (WAN) technology based on water-filling power allocation, multi-frequency logarithmic frequency control array (MultilogFrequency Diverse Array, MFDA) technology, more specifically, relates to a modulation method based on a multi-frequency logarithmic frequency control array. Background technique [0002] With the rapid development of wireless communication technology in recent years, people pay more and more attention to the security issues in the process of wireless communication. The low-latency and high-speed requirements of modern wireless communication and the increasing computing power of eavesdroppers make more and more systems adopt physical layer security technology to replace the high-complexity upper-layer key exchange technology...
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IPC IPC(8): H04B7/06
CPCH04B7/0617H04L63/16
Inventor 陈建功焦利彬董彬虹雷霞肖悦
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA