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Invention Application
US20080043886A1 Symbol timing detection method and apparatus, and preamble detection method and apparatus 失效
符号定时检测方法和装置以及前同步码检测方法和装置

Symbol timing detection method and apparatus, and preamble detection method and apparatus
Abstract:
A complex correlation unit of a detection execution unit calculates a correlation between a received signal and a fixed preamble pattern and sequentially obtains a correlation result. A correlation peak detection section updates a maximum value of a correlation result R as a correlation peak value and holds it. An error detection threshold generation section multiplies the correlation peak value detected by the correlation peak detection unit by a coefficient α (0
Abstract(Chinese):

检测执行单元的复相关单元计算接收信号和固定前导码模式之间的相关性，并且顺序地获得相关结果。 相关峰值检测部分将相关结果R的最大值更新为相关峰值并保持相关峰值。 误差检测阈值生成部分将由相关峰值检测单元检测的相关峰值乘以系数α（0 <α<1）以获得错误检测阈值。 在相关峰值检测部检测和保持的相关峰值在具有预定长度的符号定时确定期间未被更新的条件下，错误检测确定部分和控制部分将相关峰值的定时确定为符号定时 并且在符号定时确定时段内定义的错误检测确定时段中相关结果的出现次数超过错误检测确定阈值的数量小于预定数量。

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