Abstract
Fine-grained spectrum management is promising in addressing the contradiction between the access requirements for massive radio systems and the shortage of spectrum resources. It is difficult to identify the radio system and securely transmit its spectrum identity information due to the complexity, openness, and variability of the electromagnetic environment, which has become a major challenge for the fine-grained spectrum management. In this paper, we consider a practical and proactive spectrum monitoring scenario, where the spectrum monitoring node monitors the communication signal sent by a source node to a destination node for the fine-grained spectrum management. A malicious node eavesdrops on the transmission for accessing and deceiving them. We propose a secure transmission method of spectrum watermark for the fine-grained spectrum management. The spectrum watermark for identifying the radio system is hidden in the normal communication signal via adjusting the embedding parameters, and has no effect on the required transmission performance. We investigate the transmission performance of the spectrum watermark in two typical use cases. In first case, the transmission rate of the communication signal is given and fixed. In another case, the transmission rate of the communication signal can be adaptively adjusted according to the channel quality. The analysis and simulation results show that the proposed method achieves the optimal and secure transmission of the spectrum watermark by adjusting the embedding parameters of the spectrum watermark while ensuring the required and optimal transmission performance of the communication signal.
Highlights
With the rapid development and broad application of wireless communication technology, the number of mobile users and their requirements for bandwidth are growing rapidly
The noise power spectral density at the destination node (DN) and the spectrum monitoring nodes (SMNs) are the same, and the SNR is defined as SNR
Radio spectrum identification is critical in fine-grained spectrum management
Summary
With the rapid development and broad application of wireless communication technology, the number of mobile users and their requirements for bandwidth are growing rapidly. The radio system can obtain the channel information between the radio system and the SMN from these spectrum information provided by spectrum management system, so that it can adjust the embedding parameters of the SW to realize the secure transmission of the SW. The SMN does not demodulate the communication signal of the SN and treats it as an interference signal For those licensed radio systems, they must report some technical parameters to the spectrum management system, such as spectrum identity information encoding and embedding mode. (10b) (10c) (10d) (10e) where (10b) describes the limited condition meeting the required transmission performance of the communication signal, (10c) describes the limited condition of the total transmit power of the SN, (10d) describes the limited condition ensuring that the SW is not detected by the MN, (10e) describes the spread spectrum gain of the SSC that only makes some discrete integer values.
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