一种虚拟子载波OFDM系统导频设计新方法

2010 IEEE International Conference on Wireless Communications, Networking and Information Security Pub Date : 2010-06-25 DOI:10.1109/WCINS.2010.5541761

D. Hu, Xiaolin Zhou

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引用次数: 3

摘要

提出了一种虚拟子载波正交频分复用(OFDM)系统的导频设计新方法。该方案最小化与最小二乘信道估计的均方误差(MSE)相关的简单函数，而不是最小化MSE本身。结果表明，通过顺序求解多个一维优化问题，可以有效地获得次优导频子载波。与许多协议中常用的部分配置导频设计相比，该方案对系统参数具有更强的鲁棒性，并且可以在大信道长度下提供更准确的信道估计。

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A new pilot design method for OFDM systems with virtual subcarriers

In this paper, a new pilot design method for orthogonal frequency division multiplexing (OFDM) systems with virtual subcarriers is proposed. The proposed scheme minimizes a simple function relevant to the mean-square error (MSE) of the least squares (LS) channel estimate instead of minimizing the MSE itself. As a result, the suboptimal pilot subcarriers can be obtained efficiently by sequentially solving several one-dimensional optimization problems. Comparing with the partially equispaced pilot design which is commonly used in many protocols, the proposed scheme is more robust to the system parameters and can provide much more accurate channel estimate for large channel lengths.

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来源期刊

2010 IEEE International Conference on Wireless Communications, Networking and Information Security

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