关于一个唯一可解码的编码FSO系统在马拉加流中以指向错误的错误性能和通道容量
Optics express
|October 20, 2023
概括
唯一可解码的代码 (UDC) 提高了自由空间光通信 (FSO) 的吞吐量. 这项研究量化了UDC-FSO错误性能和流和指向错误下的通道容量,显示了比传统链路更高的容量.
科学领域:
- 光学通信是指光学通信.
- 信息理论 信息理论
- 编码理论编码理论
背景情况:
- 自由空间光学 (FSO) 通信系统提供高带宽,但容易受到大气流和指向错误的影响.
- 唯一可解码代码 (UDC) 之前已经显示了提高FSO系统吞吐量的潜力.
- 在现实的道损害下对UDC-FSO性能进行定量分析对于实际部署至关重要.
研究的目的:
- 量化分析唯一可解码 (UDC) 增强的自由空间光学 (FSO) 系统的错误性能和通道容量.
- 调查马拉加流和指点错误对UDC-FSO系统性能的影响.
- 将UDC-FSO系统的通道容量与传统的端到端 (E2E) FSO链路进行比较.
主要方法:
- 关于用于通用符号错误率 (SER) 分析的叠加模式最小距离 (MDSP) 近似的建议.
- 对于2个发射器 (TX) UDC-FSO系统的封闭形式的SER表达式的演.
- 基于SER的比特错误率 (BER) 的上限和下限的推导.
- 定义和扣除不同叠加模式的UDC-FSO系统的离散通道容量.
- 通过模拟和实验验证进行验证.
主要成果:
- 叠加模式的最小距离 (MDSP) 近似准确地预测了UDC-FSO系统的符号错误率 (SER).
- 对于2-TX UDC-FSO案例,一个封闭形式的SER表达式得到了推导,使BER绑定计算成为可能.
- 对于不同的UDC叠加模式,量化了离散通道容量和容量增长.
- 实验和模拟结果证实了衍生表达式的准确性.
- 与传统的E2E FSO链路相比,UDC-FSO系统显示出更高的通道容量.
结论:
- UDC显著提高了FSO系统的性能,特别是在具有挑战性的通道条件下,如马拉加流和指向错误.
- MDSP近似为分析UDC-FSO错误性能提供了一个有价值的工具.
- UDC-FSO系统提供更高的最大通道容量,受UDC代码书的限制,性能优于传统的E2E链路.
- 这项研究为更强大,更高容量的FSO通信系统铺平了道路.
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