期刊
IEEE TRANSACTIONS ON SIGNAL PROCESSING
卷 65, 期 21, 页码 5621-5634出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TSP.2017.2740164
关键词
Discreteness-aware design; multiuser detection; proximal splitting algorithm; restricted isometry property; sum-of-absolute-values optimization
资金
- JSPS KAKENHI [15H02668, 15K14006, 15K06064, 15H02252, 16H01546]
- Grants-in-Aid for Scientific Research [15H02668, 15H02252, 16H01546, 15K06064, 15K14006] Funding Source: KAKEN
In this paper, we consider multiuser detection that copes with multiple access interference caused in low-rate wireless communication systems with a large number of nodes, such as machine-to-machine communications. We take account of discreteness of transmitted signals (e.g., binary signals taking values of +/- 1), which we utilize as prior information in detection. We first formulate the detection problem as a maximum a posteriori estimation problem. Since this problem is highly nonconvex and discontinuous, we propose convex relaxation based on the sum-of-absolute- values (SOAV) optimization, which can be efficiently solved by proximal splitting. We also derive an upper bound of the relaxation error by the SOAV optimization in noisy cases based on the restricted isometry property. Numerical simulations are shown to illustrate the effectiveness of the proposed approach.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据