A Cooperative Transmission and Receiving Scheme for IDMA with Time-Reversal Technique

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

来源：Wireless Personal Communications, 2011, 58(4): 637-656.

DOI：10.1007/s11277-009-9898-6

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

In this paper, we propose an efficient uplink and downlink cooperative transmission and receiving scheme for interleave-division multiple access (IDMA) systems with time-reversal (TR) technique. We refer this system as TDR-IDMA, since the time- division duplexing (TDD) mode is used in this transceiver system. In TDR-IDMA systems, the time-reversed version of the channel impulse responses obtained from the uplink is used to process the received signal before the elementary signal estimator in the receiver of base station (BS). Due to the weak correlations of multi-path for different users, the signal to interference and noise ratio (SINR) at the beginning of turbo-like detection of TDR-IDMA can be increased significantly. Compared with conventional IDMA system, much less iterations is needed for signal detection in TDR-IDMA systems. Thus, the proposed scheme effectively reduces the multi-user detection (MUD) computation load for the uplink, which is the bottleneck for IDMA system. TR processing is also applied in the transmitter of BS to reduce the complexity of user ends (UEs). Simulation and analysis results show that TDR-IDMA can achieve the same performance of the traditional IDMA system with fast processing speed and simple UEs.

• 出版日期2011-6
• 单位四川轻化工大学; 电子科技大学