Semi-Blind Reception Using Joint Channel Estimation in IDMA Systems

作     者：Abdelkrim Hamza Ali Kazem Gérard Salut 

作者机构：CNRS LAAS 7 Avenue du Colonel Roche Toulouse France Univ. de Toulouse LAAS Toulouse France LCPTS Laboratoire de Communication et du Traitement du Signal FEI-USTHB Alger Algérie 

出 版 物：《International Journal of Communications, Network and System Sciences》 (通讯、网络与系统学国际期刊（英文）)

年 卷 期：2012年第5卷第7期

页      面：430-435页

学科分类：0810[工学-信息与通信工程] 08[工学] 081001[工学-通信与信息系统] 

主　　题：Channel Estimation IDMA Multiuser Detection 

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.