Iterative precoding scheme for downlink OFDMA system with carrier-frequency offset

作者：Huang Min^*; Zhao Ming; Zhou Shidong; Wang Jing

来源：IEICE - Transactions on Communications, 2007, E90B(9): 2613-2616.

DOI：10.1093/ietcom/e90-b.9.2613

• orthogonal frequency-division multiplex access (OFDMA)
• downlink
• carrier-frequency offset (CFO)
• precoding
• iterative

In orthogonal frequency-division multiplex access (OFDMA) downlink systems, the carrier-frequency offset (CFO) between the multiple transceivers introduces inter-carrier interference (ICI). In this letter, we propose an iterative precoding scheme to suppress the ICI due to CFO. This scheme is applied at the transmitter, and can jointly cancel the ICI for all the receivers. Moreover, by the studies of the convergence behavior of the iterations, a sufficient condition for the convergence is presented. The theoretical analysis and simulation results both show that this iterative scheme is equivalent to the zero-forcing (ZF) scheme in function, but with much lower complexity.

• 出版日期2007-9
• 单位清华大学