在CDMA系统中通过 -minimization进行多次访问干扰抑制
Xue Jiang1, Xingzhao Liu1, T Kirubarajan2
1School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.
Fundamental research
|June 27, 2024
概括
本研究介绍了一种强大的线性编程 (ROLP) 算法,以改善在代码分割多重访问 (CDMA) 系统中盲目的多用户检测. 即使有扭曲的信号,ROLP也可以有效地减轻多重访问干扰 (MAI).
科学领域:
- 信号处理 信号处理
- 电信工程 电信工程 电信工程
- 优化理论 优化理论
背景情况:
- 代码划分多重访问 (CDMA) 系统面临多重访问干扰 (MAI) 的挑战.
- 传统的最小输出能量 (MOE) 探测器在多路径或定时问题导致的特征波形扭曲时表现不佳.
- 盲目的多用户检测旨在检测信号,而无需事先了解其他用户的信息.
研究的目的:
- 提出一种新的强大的线性编程 (ROLP) 算法,用于CDMA系统中盲目的多用户检测.
- 在特征波形不匹配和非高斯信号条件下提高探测器性能.
- 与现有的强大方法相比,开发一个计算效率高的算法.
主要方法:
- ROLP算法将输出信号的L1规范最小化,以利用非高斯信号属性.
- 它结合了针对签名不匹配的稳定性,通过在一个新的形不确定性集中限制大小响应.
- 优化问题被重新表述为一个线性程序,以高效地解决.
主要成果:
- 拟议的ROLP算法在模拟中展示了与现有的强大的探测器相比更高的性能.
- 它显示了对特征波形扭曲的稳定性,优于基于MOE的技术.
- ROLP的计算复杂性低于需要二级形编程的强大方法.
结论:
- ROLP算法为CDMA中盲目的多用户检测提供了有效和计算效率高的解决方案.
- 它在存在信号扭曲和非高斯度的情况下提供了强大的性能.
- 新的罗姆布不确定性集有助于提高检测准确性,接近最佳性能极限.
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