Establishment and Analysis of Correlation Interference Model for Direct Spread Communication

Aiming at the low interception and anti-interference of spread spectrum communication system, the conventional jamming methods such as single voice jamming and broadband sweep jamming have the disadvantages of low jamming efficiency and high power requirement. This paper focuses on the more efficient correlation jamming to direct spread spectrum communication. By establishing the correlation jamming model, the factors affecting the jamming effect at the receiving end are theoretically deduced, and carries on the simulation experiment is to verify and obtain the corresponding conclusion. It is concluded that the jamming signal is the same or opposite to the target, and can achieve the desired jamming effect when the emitting delay is multifold and there is no frequency deviation. Different spread spectrum sequences, non-integer multiple delays and increasing frequency offset will weaken the interference effect, and improving the interference signal ratio can make up for the reduction of interference effect. This paper summarizes the interference performance of correlation interference to direct spread spectrum communication under non ideal conditions. In practical application, the specific interference parameters can be adjusted through the conclusion of this paper to achieve low-cost effective interference.