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Method and device for encrypting MMSE (minimum mean square error) pre-equalization wireless channel based on multipath redundancy

A technology of wireless channel and encryption method, which is applied in wireless communication, security device, diversity/multi-antenna system, etc., and can solve problems such as broadcast feature security

Active Publication Date: 2011-08-17
THE PLA INFORMATION ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a MMSE pre-equilibrium wireless channel encryption method and device based on multipath redundancy. Adaptability, using random time reversal to encrypt the channel to solve the security problems caused by the broadcast characteristics of wireless channels

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  • Method and device for encrypting MMSE (minimum mean square error) pre-equalization wireless channel based on multipath redundancy
  • Method and device for encrypting MMSE (minimum mean square error) pre-equalization wireless channel based on multipath redundancy
  • Method and device for encrypting MMSE (minimum mean square error) pre-equalization wireless channel based on multipath redundancy

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Embodiment 1

[0066] Embodiment one: see figure 1 , the present invention is based on the MMSE pre-balanced wireless channel encryption method of multipath redundancy, under the TDD operating mode, completes the encryption processing of the wireless channel through the following steps:

[0067] Step 101: When the communication starts, the signaling transmitting module firstly controls the receiving front end to transmit the channel detection signal, which can be a raised cosine pulse or a pilot signal;

[0068] Step 102: The transmitting end estimates the wireless channel multipath information according to the received channel sounding signal;

[0069] Step 103: Generate preprocessing factors according to the estimated multipath information

[0070] Step 104: Generate pre-equalization factors according to wireless channel multipath information and preprocessing factors

[0071] Step 105: The source signal undergoes pre-equalization processing in step 4, and then undergoes random time inve...

Embodiment 2

[0073] Embodiment two: see Figure 1 ~ Figure 4 : this embodiment is based on the MMSE pre-balanced wireless channel encryption method of multipath redundancy, adopting such as figure 2 The shown pre-balanced wireless channel encryption device realizes: where

[0074] Step 201: a signaling transmission module, which periodically sends pilots or other signals for detecting multipath channels to the transmitter according to a preset transceiver mechanism;

[0075] Step 202: a signaling receiving module, which controls the transmitting end to periodically receive uplink channel sounding signals within an agreed time period;

[0076] Step 203: the channel estimation module estimates the wireless multi-channel information between Alice and Bob by receiving the uplink signal;

[0077] Step 204: a random preprocessing module, which needs to introduce some kind of redundancy in order to perform encryption at the physical layer in order to randomize the transmitted signal to achieve...

Embodiment 3

[0104] Embodiment three: see figure 2 , this embodiment discloses a multipath redundancy-based MMSE pre-balanced wireless channel encryption device, the wireless channel encryption device includes a receiver and a transmitter, and the receiver includes:

[0105] Signaling transmission module: used to transmit wireless channel detection signals, and transmit channel detection signals to the transmitter according to the predetermined periodic time slot;

[0106] Receiving front end: used to receive the signal sent by Alice;

[0107] The transmitter includes:

[0108] Signal receiving module: used to control Alice's time division duplexer, periodically receive Bob's channel detection signal, and send it to the channel estimation unit.

[0109] Channel estimation unit: receiving the channel sounding signal received by the signaling receiving module, and performing channel estimation on the received channel sounding signal to obtain the required wireless channel multipath inform...

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Abstract

The invention relates to physical layer encryption in the technical field of wireless communication safety, and in particular relates to a method and device for encrypting MMSE (minimum mean square error) pre-equalization wireless channel based on multipath redundancy. In the method, under a TDD (time division duplex) working pattern, 1) firstly, a receiver sends channel detection signals by utilizing an upstream channel, wherein the channel detection signals are used for detecting a multipath channel; 2) the receiver estimates wireless channel multipath information between the receiver and atransmitter according the received channel detection signals sent by the upstream channel; 3) the wireless channel multipath information is subjected to turnover treatment; 4) a pre-equalization factor is obtained on the basis of a power constraint condition according to the wireless channel multipath information; and 5) signals to be sent are pretreated by utilizing a pre-equalization factor anda pre-treatment factor. According to the invention, based on the multipath redundant property of the wireless channel and time diversity concept, the environment adaptivity is introduced in a wireless wide band communication system by utilizing a time-reversal technology, the channel is encrypted by utilizing time reversal, and the safety issue brought by broadcast property of the wireless channel is solved.

Description

technical field [0001] The invention relates to the physical layer encryption problem in the technical field of wireless communication security, in particular to a multipath redundancy-based MMSE pre-balanced wireless channel encryption method and device. Background technique [0002] In recent years, various wireless communication concepts such as 3G, ultra-wideband, and the Internet of Things have emerged in an endless stream. New wireless communication technologies have sprung up, enabling more and more devices to have mobile access capabilities, solving the connection constraints of traditional wired access, and providing users with various efficient and high-speed access solutions. Although wireless communication has got rid of the shackles of wires, its open communication medium has brought huge hidden dangers to the security of wireless communication. Therefore, people devise various encryption techniques to protect information. In the process of communication, info...

Claims

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Application Information

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IPC IPC(8): H04W12/02H04B7/08H04L25/03
Inventor 金梁罗文宇吉江钟州刘双平宋华伟赵华王春铭刘彩霞杨梅樾李印海
Owner THE PLA INFORMATION ENG UNIV
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