University of Electronic Science and Technology of China

Huawei Technologies Co., Limited

Nxp B.v.

Science & Technology Department of Sichuan Province

Hong Wen

Jie Tang

Huanhuan Song

Yi Chen

Liang Chen

Fei Pan

Feng Li

Jinling Zhang

Runfa Liao

Feiyi Xie

Yong Cao

Da Xiang

Yang Tu

Jianho Hu

Xinchen Xu

Kaiyu Qin

A method for physical layer secure transmission against an arbitrary number of eavesdropping antennas includes: S: communication between legitimate transmitter Alice and legitimate receiver Bob is confirmed; S: Alice randomly generates a key bit bwith Mbits, maps the key bit binto a key symbol K, and performs an XOR on the key bit band to-be-transmitted confidential information b to obtain an encrypted bits b; S: Bob transmits a pilot sequence to Alice, and Alice calculates a candidate precoding space W and transmits modulated symbol streams s=(s, . . , s) by using precoding W(e); S: Bob measures received signal strength of each antenna, estimates the corresponding antenna vector e, inversely maps the vector e to obtain key symbols and key bits, and demodulates the received symbol streams in sequence at each activated antenna to obtain demodulated ciphertext bits; S: Bob performs an XOR on observed key bits and the demodulated ciphertext bits to obtain the confidential information.

Physical layer secure communication against an eavesdropper with arbitrary number of eavesdropping antennas

A quantitative method for the security access strategy selection of the edge computing terminals includes the following steps: S1. Quantifying and ranking the security risks according to the terminals and data application requirements under the edge computing system. S1. Quantifying and ranking the security risks according to the terminals and data application requirements under the edge computing system. S2. Calculating the security quantification value of terminal and data application. S3. Giving the weight coefficients for the security risk protection of the security access strategies for the terminal and data in the edge computing side. S4. Give the corresponding value of each security strategy to the corresponding terminal and data security protection. S5. Select the corresponding algorithm according to the data set in S4 to select the security strategies.

Quantitative selection of secure access policies for edge computing system

A time-domain segmented calibration method for a characteristic impedance of a time-domain reflectometer is provided. The method first segments the measured characteristic impedance value according to the reflection coefficients &#x3c1;, determines several boundary points with the reflection coefficients, and divides the range of the measured impedance according to the impedance values corresponding to the reflection coefficients of the boundary points, and then select a typical impedance value in the range as a reference impedance for calibration. The TDR instrument performs characteristic impedance calibration for each typical reference impedance value one by one, and stores them as calibration parameters of different groups. With respect to different impedance value ranges, the selection ranges of the calibration and measurement areas of TDR are different. When the measurement is performed, the 50&#x3a9; calibration parameter is used as the default reference for calculation.

Time-domain segmented calibration method for a characteristic impedance of a time-domain reflectometer

A data transmission method, a base station, and user equipment are presented. The method includes performing rotation processing on a preset precoding matrix; performing precoding processing on to-be-sent information according to a precoding matrix obtained after the rotation processing; and sending to-be-sent information obtained after the precoding processing. In the embodiments of the present disclosure, indication information shared by a transmit end and a receive end is used to indicate whether to rotate a precoding matrix, and to-be-sent information is precoded according to the indication information. The transmit end and the receive end in this method learn the indication information in advance, and system security is improved by instructing the precoding matrix to perform flexible transformation.

Data transmission method, base station and user equipment

A cross layer authentication method based on radio frequency fingerprint, it includes the following steps: S1. In the first time slot, the legitimate transmitter A sends the first packet to the legitimate receiver B, and then B identifies the first data packet by the upper layer authentication; S2. The legitimate recipient B extracts the RF fingerprint eigenvector of the legitimate sender A, and stores it in the memory of the legitimate receiver B; S3. In the next time slot, the sender X sends the second packet to the legitimate receiver B, and the legitimate recipient B extracts the RF fingerprint eigenvector of the sender X; S4. Set sample of the RF fingerprint eigenvector; S5. legitimate receiver B estimates the similarity between the RF fingerprint eigenvector of the sender X and sample of the RF fingerprint eigenvector. This invention is in advantage of low computational complexity, small delay and high precision.

Cross-layer authentication method based on radio frequency fingerprint

The present invention discloses an unconditional secure communication method based on beam-forming and security code, which comprises the following steps of: Legitimate users send to the signal pie-encoded and modulated, meanwhile eavesdropper receives signals and calculates the bit error rate; computing security coding parameters, legitimate received users send pilot sequence, and legitimate sending users estimate legitimate channel, and extract information on legal channel coding and modulating signal was SVD pre-coding and sending; the signal was decoded, that will be judgment and demodulation then the signal after decoding do security code is transmitted to message or tapping, due to lack of legal channel information, eavesdropper cannot lift pre-coding processing of the received signal with the high bit error rate. This method can establish advantages channel of the wiretap model channel and to ensure that legitimate users can receive signals at the lower bit error rate.

Unconditional secure communication method based on beam-forming and security code

A memory efficient, accelerated implementation architecture for BCJR based forward error correction algorithms. In this architecture, a memory efficiency storage scheme is adopted for the metrics and channel information to achieve high processing speed with a low memory requirement. Thus, BCJR based algorithms can be accelerated, and the implementation complexity can be 5 reduced. This scheme can be used in the BCJR based turbo decoder and LDPC decoder implementations.

Growing community of inventors

Chengdu, China

Hong Wen