Linear cyclostationary analysis of noncoherent direct-sequence code tracking in pulsed jamming

The performance of two direct-sequence code tracking systems operating in the presence of background thermal noise and a pulsed wideband noise jammer is presented. One system has a front-end automatic signal-level control, while the other has no such signal strength protection in front of the loop. The pulsed jammer is modeled as a cyclostationary interference, which makes it possible to directly explore not only the impact of the jammer´s parameters, such as duty factor, repetition frequency, and jamming power level, but also the effectiveness of the front-end automatic signal-level control, on the tracking loop´s behavior. The two systems are examined under linearized performance analysis of loop operation, and compared with each other