Analysis of the CFO Successive Interference Cancellation for the OFDMA Uplink

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• 作者：Gustavo J. González ; Fernando H. Gregorio…
• 关键词：OFDMA ; SC ; FDMA ; CFO compensation ; Multiple access interference
• 刊名：Wireless Personal Communications
• 出版年：2016
• 出版时间：November 2016
• 年：2016
• 卷：91
• 期：2
• 页码：989-1002
• 全文大小：731 KB
• 刊物类别：Engineering
• 刊物主题：Electronic and Computer Engineering
  Signal,Image and Speech Processing
  Processor Architectures
  
• 出版者：Springer Netherlands
• ISSN：1572-834X
• 卷排序：91

文摘

The uplink of orthogonal frequency division multiple access or single-carrier frequency division multiple access suffers multiple access interference when carrier frequency offset (CFO) is not properly estimated and compensated. In particular, multicarrier uplink CFO compensation is highly complex due to the multiuser context. Successive interference cancellation algorithms are effectively employed to compensate for the CFO, where the interference produced by each user is handled sequentially through a series of iterations. The main contribution of this work is the analysis of the CFO compensation performance of efficient successive cancellation algorithms. We study the mean square symbol error, and derive a useful upper-bound of the compensation technique performance at convergence. This result extends the general convergence results for the space-alternating generalized expectation-maximization algorithm in the CFO compensation scenario. Finally, we validate the analysis with numerical simulations.