Semi-Blind Reception Using Joint Channel Estimation in IDMA Systems

• 作者: Abdelkrim Hamza Ali Kazem Gérard Salut
• 来源期刊: 通讯、网络与系统学国际期刊(英文)
• 学科: 工学
• 关键词: CHANNEL ESTIMATION IDMA MULTIUSER Detection
• 年，卷（期）: 2012,（7）
• 页码范围: 430-435
• 页数: 6页
• 分类号: TN91

摘要

In this paper a bi-directional system based on linear channel estimation and data detection using turbo detection algorithm is proposed. By combining channel estimation with an iterative chip-by-chip detection process (inner loop) in an iterative way (outer loop), communications performance can be further increased. We present results on blind reception in case of Interleave Division Multiple Access (IDMA) system when the channel coefficients are unknown. We develop a low-complexity iterative joint channel/code estimation method. The philosophy of the turbo processing is the iterative exchange of related information which yields a substantial improvement of the overall system performance. We analyze the achievable performance of the iterative system proposed. Simulation results demonstrate the efficiency of the proposed algorithms.