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首页> 外文会议>Annual Allerton Conference on Communication, Control, and Computing; 20040929-1001; Monticello,IL(US) >Pilot-Less Carrier Offset Recovery for 8-VSB Robust to Multipath Propagation
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Pilot-Less Carrier Offset Recovery for 8-VSB Robust to Multipath Propagation

机译：用于8-VSB的无飞行员载波偏移恢复，稳健地传播至多径

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摘要

In this paper, we address the problem of pilot-less carrier frequency recovery for 8-VSB digital TV signal under multipath conditions. A closed-loop carrier recovery scheme is proposed that is robust to frequency selective multipath channels. The method is developed by minimizing the residual error associated with the BLUE (Best Linear Unbiased Estimator) channel estimator using training symbols. The channel is first estimated from the training symbols using the BLUE method without carrier knowledge. Then the residual error associated with the BLUE equations is minimized by adjusting the carrier compensation frequency. The accuracy can be improved by iterating between the BLUE channel estimate and the carrier compensation. Simulations are presented verifying that the residual error associated with an approximate BLUE channel estimation scheme is a good metric for carrier offset compensation.
机译：在本文中，我们解决了8-VSB数字电视信号在多径条件下的无导频载波恢复问题。提出了一种对频率选择性多径信道具有鲁棒性的闭环载波恢复方案。通过使用训练符号最小化与BLUE（最佳线性无偏估计器）信道估计器相关的残留误差来开发该方法。首先在没有载波知识的情况下使用BLUE方法从训练符号中估计信道。然后，通过调整载波补偿频率，将与BLUE方程相关的残留误差降至最低。可以通过在BLUE信道估计和载波补偿之间进行迭代来提高精度。进行了仿真，验证了与近似BLUE信道估计方案相关的残留误差是用于载波偏移补偿的良好指标。

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