| 一种非相干复合网格解调算法的连续相位调制 |
投稿时间：2018-05-31 修订日期：2018-06-11  点此下载全文 |
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| 中文摘要:非合作通信环境中,由于无法精确已知载波频率,存在残留频偏,所以需要采用非相干解调算法。迄今为止,虽然连续相位调制的盲解调技术研究取得了很大的进展,但对于现有的非相干解调方法,在性能上与最佳相干解调方法仍存在很大差距。本文提出一种基于复合网格的非相干解调算法,首先将连续相位调制信号的基本网格图与多个相位旋转网格图交叉合并为一个复合网格图,并在复合网格图的单元网格之间引入状态耦合转移,实现对残留频偏的有效跟踪。仿真结果表明,该算法的解调性能非常接近相干解调,在误码率为0.001处,解调性能比最佳相干解调算法劣化2dB。 |
| 中文关键词:通信信号 连续相位调制 非相干解调 复合网格 |
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| Continuous Phase Modulation for a Non-Coherent Composite Grid Demodulation Algorithm |
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| Abstract:In the Non-cooperative communication environment, due to the precise carrier frequency can not be known, there are residual frequency offset, so the need to use non-coherent demodulation algorithm. So far, great progress has been made in the blind demodulation technique of continuous phase modulation. However, there is still a big gap between the performance and the best coherent demodulation method for the existing non-coherent demodulation methods. In this paper, a non-coherent demodulation algorithm based on complex grid is proposed. Firstly, the basic grid of continuous phase modulation signal is cross-coupled with multiple phase rotation grids to form a composite grid graph. State transitions are introduced between cell grids to effectively track residual frequency offsets. The simulation results show that the demodulation performance of this algorithm is very close to coherent demodulation, and the demodulation performance is 2dB worse than the best |
| keywords:communication signals CPM Non-coherent demodulation composite grid |
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