Cross-Entropy Iteration Aided Time-Hopping Pattern Estimation and Multi-hop Coherent Combining Algorithm

MIAO Xiaqing; WU Rui; YUE Pingyue; ZHANG Rui; WANG Shuai; PAN Gaofeng

doi:10.11999/JEIT240677

Article Contents

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MIAO Xiaqing, WU Rui, YUE Pingyue, ZHANG Rui, WANG Shuai, PAN Gaofeng. Cross-Entropy Iteration Aided Time-Hopping Pattern Estimation and Multi-hop Coherent Combining Algorithm[J]. Journal of Electronics & Information Technology. doi: 10.11999/JEIT240677

Citation:

MIAO Xiaqing, WU Rui, YUE Pingyue, ZHANG Rui, WANG Shuai, PAN Gaofeng. Cross-Entropy Iteration Aided Time-Hopping Pattern Estimation and Multi-hop Coherent Combining Algorithm[J]. Journal of Electronics & Information Technology. doi: 10.11999/JEIT240677

Citation:

MIAO Xiaqing, WU Rui, YUE Pingyue, ZHANG Rui, WANG Shuai, PAN Gaofeng. Cross-Entropy Iteration Aided Time-Hopping Pattern Estimation and Multi-hop Coherent Combining Algorithm[J]. Journal of Electronics & Information Technology. doi: 10.11999/JEIT240677

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Cross-Entropy Iteration Aided Time-Hopping Pattern Estimation and Multi-hop Coherent Combining Algorithm

doi: 10.11999/JEIT240677

School of Cyberspace Science and Technology Engineering, Beijing Institute of Technology, Beijing 100081, China

Received Date: 2024-07-31
Rev Recd Date: 2024-12-17

Available Online: 2024-12-20

Abstract

Abstract

As an vital component of the global communication network, satellite communication attracts significant attention for its ability to provide seamless global coverage and establish an integrated space-ground information network. Time Hopping (TH), a commonly employed method in satellite communication, is characterized by its robust anti-jamming capability, flexible spectrum utilization and high security. In pursuit of augmenting data transmission security, a system that employs randomly varying TH patterns is devised. To address the issue of limited transmission power, a multi-hop signal coherent combining strategy is proposed. Additionally, under the constraint of low Signal-to-Noise Ratio (SNR) at the receiver, a Cross-Entropy (CE) iteration aided TH patterns and multi-hop carrier phase joint estimation algorithm is presented, which adaptively adjusts the probability distribution of estimated parameters with the SNR loss of the combined signal serving as the objective function, facilitating rapid convergence towards optimal solutions. Simulations demonstrate the superior performance of the proposed algorithm in terms of iterative convergence speed, parameter estimation error, and combined demodulation Bit Error Rate (BER). Compared with the traditional algorithm, the proposed algorithm achieves near-theoretical BER performance with low complexity, significantly improving the stability and reliability of satellite TH communication systems in complex environments.
- Time-hopping communication,
- Multidimensional parameter joint estimation,
- Time-Hopping(TH) pattern estimation,
- Cross-Entropy (CE),
- Coherent combination

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References(16)

References

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