Multiuser Receiver for Joint Symbol/Channel Estimation in Dual-Hop Relaying Systems

作者：Xi, Han; de Almeida, Andre L. F.^*

来源：Wireless Personal Communications, 2015, 83(1): 17-33.

DOI：10.1007/s11277-015-2377-3

• Cooperative communications
• Multiuser systems
• Channel estimation
• Symbol detection
• Tensor modeling

We consider the uplink of a multiuser cooperative dual-hop communication system, where users transmit signals towards a base station with the help of multiple relays. The base station is equipped with an antenna array, while each user and relay are single-antenna devices simultaneously accessing the channel using non-orthogonal codes. For this communication scenario, we propose a novel multiuser receiver for joint symbol and channel estimation by capitalizing on a tensor modeling of the end-to-end system. The proposed multiuser receiver allows the base station to jointly estimate users' transmitted symbols and the channels involved in the dual-hop communication. Identifiability conditions of the proposed receiver are provided along with their practical implications to system design. Simulation results corroborate the effectiveness of our multiuser receiver in terms of channel estimation accuracy and bit-error-rate.

• 出版日期2015-7
• 单位北京邮电大学