| 摘要 |
PROBLEM TO BE SOLVED: To improve preamble detection characteristics in a wireless communication system that performs frequency hopping. SOLUTION: The preamble detection apparatus includes: a correlation maximum value detection threshold generation part that determines a correlation maximum value detection threshold with a correlation peak value as a reference; a correlation maximum value detection determination part that detects one of correlation results, which exceeds the correlation maximum value detection threshold, as a correlation maximum value; a correlation peak detection part that updates the correlation peak value to the detected correlation maximum value when the correlation maximum value is detected; and a control part that sets a period, during which a correlation peak by an LO spurious component may occur, to a first period, sets a period, centering on a position of an integer multiple of a frequency hopping cycle with a correlation peak position as an origin, to a second period, and monitors presence or absence of a correlation result that exceeds the correlation maximum value detection threshold in the first period and the second period, while not applying an erroneous detection threshold to the first period. COPYRIGHT: (C)2011,JPO&INPIT |
