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首页> 外文会议>PIAGENG 2013: intelligent information, control, and communication technology for agricultural engineering >Efficient Algorithms for Solution of Interference Cancellation and Channel Estimation for Mobile OFDM System
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Efficient Algorithms for Solution of Interference Cancellation and Channel Estimation for Mobile OFDM System

机译：移动OFDM系统中干扰消除和信道估计的高效算法

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Orthogonal frequency-division multiplexing (OFDM) is robust against frequency selective fading because of the increase of the symbol duration. However, the time-varying nature of the channel causes inter-carrier interference (1C1) which destroys the orthogonal of sub-carriers and degrades the system performance severely. To alleviate the detrimental effect of ICI, there is a need for ICI mitigation within one OFDM symbol. We propose an iterative Inter-Carrier Interference (ICI) estimation and cancellation technique for OFDM systems based on regularized constrained total least squares. In the proposed scheme, ICI aren't treated as additional additive white Gaussian noise (AWGN). The effect of Inter-Carrier Interference (ICI) and inter-symbol interference (ISI) on channel estimation is regarded as perturbation of channel. We propose a novel algorithm for channel estimation o based on regularized constrained total least squares. Computer simulations show that significant improvement can be obtained by the proposed scheme in fast fading channels.
机译：由于符号持续时间的增加，正交频分复用（OFDM）可以抵抗频率选择性衰落。然而，信道的时变性质导致载波间干扰（1C1），这会破坏子载波的正交性并严重降低系统性能。为了减轻ICI的有害影响，需要在一个OFDM符号内减轻ICI。我们提出了一种基于正则化约束总最小二乘的OFDM系统迭代载波间干扰（ICI）估计和抵消技术。在提出的方案中，ICI不被视为额外的加性高斯白噪声（AWGN）。载波间干扰（ICI）和符号间干扰（ISI）对信道估计的影响被认为是信道的扰动。我们提出了一种基于规则化约束总最小二乘的信道估计新算法。计算机仿真表明，所提出的方案可以在快速衰落信道中获得显着改善。

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