PATH DETECTION DEVICE AND PATH DETECTION METHOD

摘要

An adjacent sample comparison processor (201) compares power values of adjacent samples of a delay profile created according to a reception signal over-sampled and detects whether the power value is increasing or decreasing. If the comparison result is identical to the increase/decrease information on the power values between adjacent samples at the previous time, a comparison result storage processor (204) adds 1. If the comparison result is different, the comparison result storage processor (204) performs a reset and newly sets 1. When the count of the comparison result storage processor (204) has become identical to the over-sampling number, a slope judgment processor (205) controls a path selection section (207) so as to select a corresponding sample as a path. The path selection section (207) selects a relative maximum sample as a path candidate and also selects the sample instructed by the slope judgment processor (205) as a path. Thus, it is possible to reduce the calculation amount when selecting a path, assure a path selection, and reduce the reception data error ratio.