Research of the sign demodulation algorithm under the action of high power external interference

We consider the single user detection of signal in the spread spectrum communication system used for high mobility applications. Due to the complexity of initial phase estimation differential phase shift keying (DPSK) is employed. The performance of the linear correlation algorithm and the sign algorithm in the presence of additive Gaussian noise, multipath interference and high power external interference is investigated. Interference parameters are assumed to be unknown.