| 摘要 |
<p>A range of a frequency measuring device (210) having limited range is extended by pre-processing an input signal (S). The input signal (S) is divided into a plurality of channels (202a, 209b, 202c and 202d). In each channel, the input signal is divided into substantially-bands. A frequency of the input signal is determined using a frequency measuring device (210) having limited range. The frequencies are stored in a frequency set (206). The frequency set is used to determine a frequency associated with the input signal according a set of pre-determined (214) reconstruction rules.</p> |
