Joint estimation of carrier frequency offset and power delay profile for MIMO-OFDM systems

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• 作者：Xiaoqun Gong (1)
  Chunming Zhao (1)
  Wei Xu (1)
  Yijin Yang (1)
  
• 关键词：Carrier Frequency Offset (CFO) ; Power Delay Profile (PDP) ; Maximum ; Likelihood estimation ; Multi ; Input Multi ; Output Orthogonal Frequency Division Multiplexing (MIMO ; OFDM) ; Cyclic Prefix (CP) ; TN929.5
• 刊名：Journal of Electronics (China)
• 出版年：2008
• 出版时间：July 2008
• 年：2008
• 卷：25
• 期：4
• 页码：450-456
• 全文大小：261KB
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• 作者单位：Xiaoqun Gong (1)
  Chunming Zhao (1)
  Wei Xu (1)
  Yijin Yang (1)
  
  1. National Mobile Communications Research Laboratory, Southeast University, Nanjing, 210096, China
  
• ISSN：1993-0615

文摘

This paper develops a Cyclic Prefix (CP) based joint Maximum-Likelihood (ML) estimation algorithm of Carrier Frequency Offset (CFO) and Power Delay Profile (PDP) for Multi-Input Multi-Output Orthogonal Frequency Division Multiplexing (MIMO-OFDM) systems. However, the exact solution of the joint ML estimation is very complex since it needs a search over a multi-dimensional domain. Thus a simplified method is proposed to estimate the CFO and the PDP iteratively via the alternating-projection method which could induce the multidimensional search problem to a sequence of simple one-dimensional searches. Simulations show that the proposed algorithm is more accurate and robust than the existing algorithms.