A real-time FPGA implementation of spectrum sensing applying for DVB-T primary signal

2013 ◽  
Author(s):  
Tu T. Nguyen ◽  
Khoa L. Dang ◽  
Ha V. Nguyen ◽  
Phuong H. Nguyen
Keyword(s):  
Real Time ◽  
Spectrum Sensing ◽  
Fpga Implementation ◽  
Primary Signal

scholarly journals Secure Optical Encryption Technique for Real Time Security Related Applications - A Review

2021 ◽  
Vol 12 (2) ◽  
pp. 1989-1994
Author(s):  
Anusree. L, Et. al.
Keyword(s):  
Real Time ◽  
Data Security ◽  
Digital System ◽  
Optical Correlation ◽  
Optical Encryption ◽  
Primary Signal ◽  
Sparsity Constraint

Recent development in the digital system shows that data security is most important and that optical encryption can be used not only to keep signals confidential but also to authenticate information. By integrating sparsity constraint with optical encryption, the reconstructed decoder image is not always visually recognizable, but can be authenticated using optical correlation means methods. Traditional optical encryption methods can add an extra layer of security to this design as it authenticates without leaking primary signal information. This paper discusses advances in optical authentication and includes theoretical principles and implementation examples to demonstrate the workings of typical authentication systems. Benchmarking and upcoming possibilities are discussed and it is hoped that this review work useful in advancing the field of optical safety.

scholarly journals Cooperative Spectrum Sensing Based on HML and Vector Quantization for Cognitive Radio Networks

2018 ◽  
Vol 7 (2.20) ◽  
pp. 335
Author(s):  
Shweta Alpna ◽  
Amrit Mukherjee ◽  
Amlan Datta
Keyword(s):  
Communication Network ◽  
Cognitive Radio ◽  
Real Time ◽  
Spectrum Sensing ◽  
Vector Quantization ◽  
Cooperative Spectrum Sensing ◽  
Radio Networks ◽  
Secondary Users ◽  
The Real ◽  
Novel Technique

The proposed work illustrates a novel technique for cooperative spectrum sensing in a cognitive radio (CR) network. The work includes an approach of identifying secondary users (SUs) based on Hierarchical Maximum Likelihood (HML) technique followed by Vector Quantization. Initially, the arrangement of the SUs are been observed using HML with respect to a spatial domain and then the active SUs among them are identified using VQ. The approach will not only save the energy, but the decision of the real-time and dynamic cooperative communication network becomes more accurate as we can predict the behavior of SUs movement and spectrum sensing by each individual SU at that particular  place. The results and simulations of the real-time experiment justifies with the proposed approach. 

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