Patent ID: 7283578

Claim:
An adjusting system for adjusting a threshold parameter in a wireless receiver, the wireless receiver receiving a plurality of external multipath signals in a predetermined time period to reconstruct correspondingly an original signal, the threshold parameter having a predetermined and adjustable value, the adjusting system comprising: a searcher for searching the plurality of external multipath signals, and when a multipath signal is searched, acquiring from the multipath signal a plurality of path signals having signal power higher than the predetermined threshold parameter; and a power estimator for estimating the signal power of the multipath signal and the plurality of path signals; and a parameter control apparatus for calculating each power ratio of the plurality of path signals via the signal power of each path signal to the signal power of the multipath signal, the parameter control apparatus further storing a predetermined power ratio parameter for comparing with each power ratio of the plurality of path signals; wherein when the searcher acquires a new path signal, the parameter control apparatus begins to monitor the power ratio of the new path signal, and wherein when the power ratio of the new path signal remains smaller than the predetermined power ratio parameter for a first predetermined times, the parameter control apparatus increases the value of the threshold parameter, and when the power ratio of the new path signal remains unchanged for a second predetermined times, the parameter control apparatus decreases the value of the threshold parameter, and the searcher afterwards acquires the path signals of the newly-searched multipath signal with the adjusted threshold parameter.