LTE-A PUCCH多用户接收算法研究

Research of PUCCH multi-user receiving algorithm in LTE-A

LTE-A系统使用参考信号进行上行信道估计,而使用PUCCH format 2a/2b发送上行控制信息时,由于每个时隙只有一个SC-FDMA符号可以用于传输参考信号,所以此时接收端不能直接利用参考信号进行信道估计。给出了一种易实现且复杂度低的PUCCH 2a/2b的半盲检测接收算法,该算法利用ACK/NACK信息辅助信道估计。仿真结果表明,文中提出的方法能有效提高PUCCH 2a/2b的接收性能。

Reference signal is used for uplink channel estimation in LTE-A system, when PUCCH format 2a/2b transmit uplink control information, because only a SC-FDMA symbol can be used for the transmission of reference signal in each time slot, so it can not directly use reference signal for channel estimation at the receiving end. In this paper, a kind of semi-blind detection algo- rithm is given which has lower complexity and realizes easily, using the ACK / NACK information to aid channel estimation . The simulation results show that method presented in the paper can effectively improve the reception performance of the PUCCH 2a/2b.