Blind Estimation of the PN Sequence of A DSSS Signal Using A Modified Online Unsupervised Learning Machine

Wei, Yangjie; Fang, Shiliang; Wang, Xiaoyan; Huang, Shuxia

doi:10.3390/s19020354

Cited by 12 publications

(4 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Cross-correlation properties shown in the Figure 2. Where this code differs from the rest of the other code in this regard, and this distinguishes it in the protection of information [22], [23], as well as in terms of complexity and in the transmission of one of the most secure signals in the communication system.…”

Section: Gold Sequencementioning

confidence: 99%

Implementing and designing a secure information system based on the DSSS gold sequence using MATLAB

Kaittan

Mohammed

2021

Bulletin EEI

View full text Add to dashboard Cite

During study of directly spread spectrum systems, noted that this system uses many types of code to spread data through communication process. There are different types of code sequences available with good correlation properties, they often use pesudo sequence for spreading which is to be less efficient in protecting information from the breaches that attack the communications systems from penetration. In this article gold sequence will use, which is consider better and more complex than the rest of the code sequence (pseudo-noise (PN) sequence, barker code, hadamard code, and others) in terms of the security aspect of the information, thereby it is difficult to detect the information sent in addition to that it is used in code-division multiple access. Design and implement difficult code to protect information in the communication system carried out here by using MATLAB, for sending a binary data and color photo to be sure that this system is working properly with few errors and better information protection than the rest of the other code that is used in direct sequence spread spectrum.

show abstract

Section: Gold Sequencementioning

confidence: 99%

Implementing and designing a secure information system based on the DSSS gold sequence using MATLAB

Kaittan

Mohammed

2021

Bulletin EEI

View full text Add to dashboard Cite

show abstract

“…When there is a bit delay, the correlation value is very low and means the sequences have no periodicity. Thus, we can solve the predictability and periodicity problems of the pseudo random sequence and improve the security performance by adopting the chaotic sequence [48]- [51]. The low value in all bit delays mean that a completely different sequence is generated even with a small change in one of the initial values.…”

Section: ) Chaotic Random Sequencementioning

confidence: 99%

A Noise-Shaped Signaling Method for Vehicle-to-Everything Security

et al. 2021

View full text Add to dashboard Cite

This paper presents a method to improve the Vehicle-to-Everything (V2X) security. With the recent rapid development of communication technology and traffic applications, V2X is recently commercialized and has been growing as a fundamental system for future applications. Because of the high mobility of the vehicles, V2X requires a low latency and high-reliability. However, previous security methods demand a large computational burden and generate high latency owing to complex operations and long additional data bits for ensuing security. To resolve such constraints, an advanced security method ensuring lower latency and higher reliability is required.We propose a noise-shaped signaling method that provides high-level security with low latency for reliable V2X communication. The proposed method encrypts original data symbols to noise-like symbols by applying a noise envelope that consists of Chaotic Random Magnitude Sequence (CRMS) and Chaotic Random Phase Sequences (CRPS). Our method simplifies the sequence sharing process between a sender and an intended receiver by adapting the characteristics of a chaotic dynamic system. Moreover, the proposed method does not demand additional data bits and generate delay because the method only uses simple multiplication and division procedure for data encryption in the physical layer. We analyze our method in depth using extensive simulations and various viewpoints such as error rate, probability of modulation identification. From the simulations, we demonstrate that a malicious adversary cannot comprehend the transmitted symbols and always has the maximum error rate under various network environments and conditions. We also demonstrate how the adversary cannot infer the modulation scheme from the symbols applying the proposed method. After these analyses, we confirm that the noise-shaped signaling method is high-level of secure method with a low latency for V2X communication.

show abstract

“…Neuron network (NN) also offer an effective method for obtaining the PN sequence. By adopting the constant modulus property or Hebbian criterion for the objective function, the PN sequence can be achieved through a trained NN [26].…”

Section: Introductionmentioning

confidence: 99%

Blind despreading and deconvolution of asynchronous multiuser direct sequence spread spectrum signals under multipath channels

Zhang

et al. 2023

IET Signal Processing

View full text Add to dashboard Cite

In non-cooperative scenarios, the spreading sequences or waveforms of the direct sequence spread spectrum (DSSS) signals is unknown to the receiver. This paper focuses on addressing the problem of blind estimation of the spreading waveform under multipath channels. In the scenario of direct signal path transmission, the spreading sequences can be directly obtained based on the estimated spreading waveforms. However, in the presence of multipath channels, the spreading waveform becomes the convolution of the spreading sequence and channel response, thus deconvolution should also be performed after estimating the spreading waveforms. In order to perform blind despreading and deconvolution of asynchronous multiuser DSSS signals under multipath channels, the authors propose to exploit the finite symbol characteristics of information and spreading sequences and then the iterative least square with projection method is adopted. Besides, the Cramer-Rao bound of spreading waveforms is derived in such a circumstance as a performance benchmark. The effectiveness of the proposed method is verified via simulation experiments.

show abstract

Blind Estimation of the PN Sequence of A DSSS Signal Using A Modified Online Unsupervised Learning Machine

Cited by 12 publications

References 22 publications

Implementing and designing a secure information system based on the DSSS gold sequence using MATLAB

Implementing and designing a secure information system based on the DSSS gold sequence using MATLAB

A Noise-Shaped Signaling Method for Vehicle-to-Everything Security

Blind despreading and deconvolution of asynchronous multiuser direct sequence spread spectrum signals under multipath channels

Contact Info

Product

Resources

About