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Volume 29 Issue 3
Jan.  2011
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Hu Die, He Liang-hua, Yang Lü-xi. Optimal Pilot Sequence Design Based on Nonuniform Placement for MIMO OFDM Systems[J]. Journal of Electronics & Information Technology, 2007, 29(3): 635-638. doi: 10.3724/SP.J.1146.2005.00685
Citation: Hu Die, He Liang-hua, Yang Lü-xi. Optimal Pilot Sequence Design Based on Nonuniform Placement for MIMO OFDM Systems[J]. Journal of Electronics & Information Technology, 2007, 29(3): 635-638. doi: 10.3724/SP.J.1146.2005.00685

Optimal Pilot Sequence Design Based on Nonuniform Placement for MIMO OFDM Systems

doi: 10.3724/SP.J.1146.2005.00685
  • Received Date: 2005-06-13
  • Rev Recd Date: 2006-01-03
  • Publish Date: 2007-03-19
  • In Orthogonal Frequency Division Multiplexing (OFDM) systems, to avoid influence of the low-pass filter on the transmitter side, some subcarriers on both edges of the allocated bandwidth are not used for transmission. These subcarriers are usually called virtual subcarriers which cause approach of conventional uniformly placed pilot tones inapplicable in some situations. Therefore, in this letter, based on nonuniform pilot tone placement, the optimal pilot sequences are derived, which can achieve the minimum mean square error of the least squares estimate for Multiple-Input Multiple-Output (MIMO) OFDM systems. Simulation results demonstrate the effectiveness of the proposed approach.
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