论文标题
通过未知多径褪色通道，使用零交叉检测的盲目符号率估计器家族
A Family of Blind Symbol Rate Estimators using Zero Crossing Detection over Unknown Multipath Fading Channels
论文作者
论文摘要
在本文中，我们引入了一种新的简单方法，以估算未知调制的单载体系统的符号率。引入的技术从连续的符号速率范围内检测符号率，即它不假定有限的候选符号率。该方法不需要有关系统参数的任何知识，因此完全盲目。该方法属于基于自相关的符号率估计器的家族，但是与许多这样的方案不同，其性能对滚动因子的价值不敏感。然后，我们也根据自相关函数提出了一种简单的频率偏移补偿方法。此外，我们研究了多径通道对估计器性能的影响，并提出了不同的增强功能，包括利用一个以上的零交叉。所提出的估计器是作为完整DVB-C [1]接收器的一部分实现的，并使用模拟验证，即使在低SNR和高频偏移下也可以实现稳健的性能。
In this paper we introduce a new and simple method to estimate the symbol rate for single carrier systems of unknown modulation. The introduced technique detects the symbol rate from a continuous range of symbol rates, i.e. it does not assume a finite set of candidate symbol rates. The method does not require any knowledge about system parameters and is therefore totally blind. The method belongs to the family of autocorrelationbased symbol rate estimators, yet, unlike many such schemes, its performance is insensitive to the value of the roll-off factor. We then propose a simple method for frequency offset compensation also based on the autocorrelation function. Moreover, we study the effect of multipath channel on the estimator performance and propose different enhancements including exploiting more than one zero crossing. The proposed estimator is implemented as part of a complete DVB-C [1] receiver and is verified using simulations and results in robust performance even at low SNR and high frequency offsets.
