A new bit synchronization method for a GPS receiver

M. Kokkonen, S. Pietila
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引用次数: 30

Abstract

We develop a maximum-likelihood bit synchronization algorithm. This algorithm computes an estimate of the bit energy for all possible bit boundary candidates and chooses that candidate which maximizes the energy. Means to estimate whether the received signal contains enough bit value changes are also presented. The effect of frequency error is analyzed. It is shown that small frequency errors can be tolerated. Furthermore, a way to deal with larger errors is developed. Computer simulations show that the new algorithm is efficient in handling a very weak received signal.
一种新的GPS接收机位同步方法
提出了一种最大似然位同步算法。该算法计算所有可能的比特边界候选点的比特能量估计,并选择能量最大的候选点。给出了估计接收信号是否包含足够的位值变化的方法。分析了频率误差的影响。结果表明,小的频率误差是可以容忍的。此外,还提出了一种处理较大误差的方法。计算机仿真表明,该算法可以有效地处理非常微弱的接收信号。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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