An efficient uplink transmission technique for IDMA based on time-reversal

作者：Xiong, Xing-Zhong^*; Hu, Jian-Hao; Ling, Xiang

来源：AEU-International Journal of Electronics and Communications, 2010, 64(2): 125-132.

DOI：10.1016/j.aeue.2008.12.002

• IDMA
• TDR-IDMA
• Multi-user detection
• Time-reversal
• Convergence

In this paper, we propose an efficient uplink transmission technique for interleave-division multiple access (IDMA) systems based on time-reversal (TR) technique (named as TDR-IDMA). In TDR-IDMA systems, the time-reversed version of the channel impulse responses (TR-CIR) obtained from the uplink is used to process the received signal preceding the elementary signal estimator (ESE) at the receiver. By exploiting the weak correlations of multi-paths for different users, the signal to interference and noise ratio (SINR) at the beginning of turbo-like detection of TDR-IDMA becomes significantly higher than that of the traditional IDMA. As a result, substantially less number of iterations is needed for the convergence in the proposed TDR-IDMA as compared with traditional IDMA. Our proposed technique effectively breaks the bottleneck of multi-user detection (MUD) in IDMA receiver, and the receiver's complexity is approximately independent of the number of the multi-path channels.

• 出版日期2010
• 单位四川轻化工大学; 电子科技大学