能源有限的联合源-通道编码高斯源在高斯通道上的高斯源,噪音水平未知
1Signals, Information, and Algorithms Laboratory, Massachusetts Institute of Technology (MIT), Cambridge, MA 02139, USA.
Entropy (Basel, Switzerland)
|November 24, 2023
概括
本研究介绍了一种通用的联合源-通道编码方案,用于通过噪声通道传输高斯式数据. 这种使用模块格子调制的新方案,与以前的方法相比,减少了能源消耗,特别是脉冲位置调制层.
科学领域:
- 信息理论 信息理论
- 数字通信数字通信
- 信号处理 信号处理
背景情况:
- 在添加式白色高斯噪声 (AWGN) 通道上传输高斯源需要高效的编码策略.
- 不知噪音水平和能源限制在源通道编码中带来了重大挑战.
- 实现最小平均平方误差 (MMSE) 扭曲是一个关键的绩效指标.
研究的目的:
- 为AWGN通道上的高斯源开发一个通用的联合源-通道编码方案,用于未知噪声水平和能量限制的AWGN通道.
- 为了最大限度地减少平均平方误差扭曲,同时优化能源效率.
- 在拟议方案中调查不同调制技术的性能优势.
主要方法:
- 构建一个通用的联合源-通道编码方案,使用多层模块格子调制.
- 采用模拟线性调制或模拟脉冲位置调制 (PPM) 为每个层.
- 对方案的能源效率和对不同噪声水平的扭曲性能进行分析.
主要成果:
- 拟议的方案表明,与现有的解决方案相比,节省了能源,以实现与噪音水平相对四分级增加的扭曲概况.
- 使用脉冲位置调制 (PPM) 层比线性调制层进一步提高了能源效率.
- 该方案在未知噪音水平方面具有普遍性.
结论:
- 开发的模块格调制方案提供了一种节能解决方案,用于在噪声频道上传输高斯源,噪声水平未知.
- 脉冲位置调制 (PPM) 是一种有前途的技术,可以提高这种通信系统的能源效率.
- 这项工作推进了用于实际通信场景的强大和高效的源通道编码方案的设计.
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