改进频域轮均等与预期传播干扰取消在水下声学通信中的干扰取消
Bin Jiang1,2, Yue Tang1,3, Yinan Zhao1
1School of Communication Engineering, Hangzhou Dianzi University, Hangzhou 310018, China.
Sensors (Basel, Switzerland)
|September 28, 2023
概括
这项研究引入了用于水下声通信的改进频域轮均衡 (IFDTE),提高了性能和降低了复杂性. 这种新方法实现了更好的位误差率和更快的融合,使其成为UWAC系统的理想选择.
科学领域:
- 信号处理 信号处理
- 水下声学 水下声学
- 通信工程 通信工程
背景情况:
- 由于多路径传播和有限的带宽,水下声通信 (UWAC) 道具有挑战性.
- 传统的等分方法往往难以在UWAC中平衡性能和计算复杂性.
- 有效的通道估计和干扰取消对于可靠的UWAC系统至关重要.
研究的目的:
- 为UWACs提出一个改进的频域轮均衡 (IFDTE) 方案.
- 为了提高性能 (比特错误率) 和降低UWAC系统的计算复杂性.
- 开发先进的代道估计和反机制.
主要方法:
- 使用选择性零吸引 (SZA) 改进的比例正常最小平均平方 (SZA-IPNLMS) 算法用于稀疏的UWAC通道估计.
- 使用一个集成会员 (SM) SZA差异IPNLMS (SM SZA-DIPNLMS) 具有可变步骤大小的道状态信息 (CSI) 估计.
- 在IFDTE框架内整合预期传播 (EP) 干扰取消,用于代符号概率估计.
- 提出一个双向的IFDTE,并取消EP的干扰,以加快融合.
主要成果:
- 拟议的通道估计实现了1.9和0.5dB的收益比IPNLMS和l0-IPNLMS在10-3BER.
- 与传统方法相比,IFDTE在SPACE'08和MACE'04环境中显示出0.5-1dB的性能增长.
- 该方案有效地减少了不必要的UWAC通道系数更新.
- 双向IFDTE与EP干扰取消加速融合.
结论:
- 拟议的IFDTE方案为UWACs提供了比特错误率性能的显著改进.
- 该方法实现了较低的计算复杂性,使其适合于实际的UWAC应用.
- 使用软反和EP干扰取消的代通道估计是提高性能和效率的关键.
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