RECEPTION SYSTEM OF NOISE CONTROL ADOPTING ADDITIONAL NOISE PROCESSING

摘要

PROBLEM TO BE SOLVED: To provide a reception system where receiver side S/N is considerably enhanced more than a process gain Gp by eliminating interference noise between other stations. SOLUTION: A noise estimate processing circuit NIP generates a reference spread signal es(t) and inverse spread series d(t) that have chip noise a(t) and an amplitude of an estimate signal, and a corrected reception signal rm (t) is obtained by adding a product between a desired station reference signal s(t) and the estimate amplitude and an additional signal (chip noise z(t)) from the noise estimate processing circuit NIP to a received signal r(t). The corrected reception signal rm (t) is subject to correlation analysis by the inverse spread signal d(t) received from the noise estimate processing circuit NIP, resulting that an output uD is generated. The NIP analyzes the uD and similar analysis is repeated for plural numbers by using an output z(t) of a next stage and an inverted reference spread signal es(t) as required, and the final stage output uD is hard-discriminated by a DEC.