The present invention provides a search window delay tracking procedure
for use in a multipath search processor of a CDMA radio receiver. A
channel impulse response is estimated for a received signal containing
plural paths, each path having a corresponding path delay. A search
window defines a delay profile that contains the plural paths of the
received signal. A mean or average delay is calculated for the estimated
channel impulse response (CIR), and an error is determined between the
mean CIR delay and a desired or target delay position of the Cir. search
window. An adjustment is made to reduce that error to align the targeted
position of the search window and the mean CIR delay. A Doppler frequency
is estimated for each path. The adjustment is made taking into account a
Doppler effect caused by relative movement between the transmitter and
receiver.