Blind parameter estimation for co-channel digital communication signals

Liu, M.; Yu, S.; Chen, Y.; Chen, S.

Abstract

With the rapid development of wireless communication technology, modulation signals are more and more intensive in the same frequency. Timefrequency overlapped signal over co-channel widely exists in the shortwave, ultrashort wave and satellite channels, so the research on the time-frequency overlapped signals in non-cooperation receiver is of great significance. This paper firstly studies on blind estimation of amplitude of time-frequency overlapped signals. On the basis of deep analysis of cyclic stationary characteristic in the time-frequency overlapped signals, an amplitude estimation method of time frequency overlapped signal over co-channel based on four-order cyclic cumulants is proposed. The magnitude of the signal components is estimated by using the amplitude value of four-order cyclic cumulants of overlapped signals in certain cyclic frequency. And then an initial phase estimation method based on four-order cyclic cumulants is proposed in this paper. Experiments are conducted to verify the proposed parameter estimation method of timefrequency overlapped signals in this paper. Simulation results show that the proposed blind estimation method can achieve better estimation performance in low signal-to-noise ratio (SNR) conditions.

Citation

Liu, M., Yu, S., Chen, Y., & Chen, S. (2024). Blind parameter estimation for co-channel digital communication signals. Wireless Networks, 30, 5589–5599. https://doi.org/10.1007/s11276-023-03282-z

• Journal Article Type: Article
• Acceptance Date: Feb 6, 2023
• Online Publication Date: Mar 22, 2023
• Publication Date: 2024-08
• Deposit Date: Mar 10, 2023
• Publicly Available Date: Mar 23, 2024
• Journal: Wireless Networks
• Print ISSN: 1022-0038
• Electronic ISSN: 1572-8196
• Publisher: Springer
• Peer Reviewed: Peer Reviewed
• Volume: 30
• Pages: 5589–5599
• DOI: https://doi.org/10.1007/s11276-023-03282-z
• Public URL: https://durham-repository.worktribe.com/output/1178620