The invention provides a channel and observation domain combination multi-path restraining method in a
GPS receiver, and belongs to the technical field of
satellite navigation. The channel and observation domain combination multi-path restraining method includes the steps of firstly, expanding channel correlator branches of a standard
receiver, improving the
delay resolution ratio, extending a
delay coverage range, then using a multi-path channel to output the characteristics causing
distortion of a
correlation function, building a multi-path balancer in a
receiver channel, estimating multi-path
signal components, compensating a multi-
path tracking error, and finally using the
wavelet-threshold-based filtering
algorithm to build a multi-path filter for the
receiver observed quantity to restrain the multi-path error in the pseudo-range and
carrier phase observed quantity. The channel and observation domain combination multi-path restraining method does not depend on the assumption related to multi-path parameter
prior probability distribution to be estimated and can be well suitable for dynamic changes of the multi-path environment, and the multi-path errors in
GPS receiver codes, a carrier wave
tracking loop and the pseudo-range and
carrier phase observed quantity are eliminated through the multi-path
processing comprehensive method.