Patent ID: 7257097

Claim:
An apparatus for searching a pilot signal that is received through multiple paths in a Code-Division Multiple Access (CDMA) mobile communication system, the apparatus comprising: a first shift register bank that sequentially stores pseudo noise (PN) codes; a second shift register bank that sequentially stores input signals, wherein the input signals of an even path are sampled in a first half PN chip and the input signals of an odd path are sampled in a following half PN chip; first despreading means for despreading the input signals of the even path using the PN codes inputted from the first shift register bank, wherein the first despreading means despreads the input signals of the even path in parallel to output first despreading signals; second despreading means for despreading the input signals of the odd path using the PN codes inputted from the first shift register bank, wherein the second despreading means despreads the input signals of the odd path in parallel to output second despreading signals; a coherent accumulator that accumulates the first and the second despreading signals; energy calculation means for yielding an energy value using accumulated signals from the coherent accumulator; and a non-coherent accumulator that determines an average value of the energy value for a prescribed time.