Patent ID: 6233272
Filing Date: 2001-05-15
Classification: H04B

Abstract:
A spread spectrum communication receiver comprising:a transmission path state estimating unit-which estimates states of paths from a received signal;demodulator units independently performing demodulation processes on signals propagated through the respective paths;a symbol combiner combining output signals of said demodulator units;a decision unit which is directly or indirectly coupled to said symbol combiner and makes a decision on an output signal of said symbol combiner;an unnecessary component eliminating unit eliminating a component of a first symbol which is an unnecessary component that is propagated through one of the paths and overlaps with a received component of a second symbol to be demodulated, so that the unnecessary component has been eliminated from the output signal of the decision unit; wherein said unnecessary component eliminating unit comprises:an unnecessary component demodulator unit demodulating the unnecessary component by referring to estimated states of the paths and the output signal of said decision unit; andan erasing unit subtracting an output signal of said unnecessary component demodulator unit from the output signal of said symbol combiner.