Transmit-focused multi-antenna gap-hop secure communication method
A secure communication and multi-antenna technology, applied in the field of multi-antenna gap-jump secure communication, can solve problems such as reduced efficiency, errors, and difficulty in ensuring communication reliability, and achieve the effect of increasing security and high security
Active Publication Date: 2017-12-15
XI AN JIAOTONG UNIV
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Problems solved by technology
However, a process of feeding back channel information is required, which not only reduces the efficiency, but also may make mistakes in the process of feeding back channel information, making it difficult to guarantee the reliability of communication
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[0027] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.
[0028] The system model of the emission-focused safety communication technology involved in the present invention is as follows: figure 1 As shown, both the transmitter Alice and the legal receiver Bob are equipped with multiple antennas, and the listener Eve also adds multiple antennas in order to obtain information. Among them, Eve only eavesdrops on messages and does not emit signals.
[0029] When analyzing the channel model, the following assumptions are made: ①The propagation medium is uniform linear and isotropic; ②The distance between the array elements is greater than the wavelength λ, and the influence between the array elements is negligible; ③The noise in each array element and the channel All are Gaussian additive white noise, which are independent of each other and have nothing to do with the signal; ④The channel is slo...
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The invention discloses an emission focusing type multi-antenna gap safety communication method. In the training phase, the legitimate users transmit training signals received, the transmitter phase value obtained for transmission through the next phase of testing and treatment; in the transmission signal phase, the transmitter select multiple antennas for transmitting signals based on the upward pattern, the training phase of the detected phase negated, after loading the information so that the signal came back and received legitimate users transmit antenna phase stack, so that the received energy to focus on legitimate user, legitimate users each receiving antenna separately within product-related testing, training signals for transmitting antenna can correctly demodulate the signal, the other antenna to eliminate bias based on correct demodulation of the antenna, on average receiving antenna and solving all the phase demodulating the correct information, but it is difficult eavesdropper correctly received and intercepted information. Simulation results show that the legitimate user receives symbol error rate is kept low level at low signal to noise ratio, and high eavesdropper symbol error rate.
Description
Technical field: [0001] The invention relates to a secure transmission method for wireless communication, in particular to a transmit-focused multi-antenna gap-hop secure communication method. Background technique: [0002] In recent years, wireless communication has brought convenience to people's lives, but the broadcasting characteristics of electromagnetic waves and the openness of wireless channels have challenged the security of communication. Therefore, wireless secure communication has become a research hotspot in the field of communication. Frequency hopping technology is a commonly used method of secure communication, but there are some insurmountable shortcomings in frequency hopping communication, such as occupying a large amount of spectrum resources, the size of the antenna needs to change with the change of frequency, the speed of hopping is affected by the phase-locked loop and Limitations on the speed of antenna size change, etc. In addition, once the eaves...
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IPC IPC(8): H04B7/06
Inventor 殷勤业俱莹陈媛杨骞王慧明
Owner XI AN JIAOTONG UNIV