On the performance analysis of a DCSK system under the pulse jamming environment

Area of Science:

• Telecommunications Engineering
• Signal Processing
• Information Theory

Background:

• The performance of spread spectrum systems like DCSK is crucial in secure communication.
• Jamming environments, particularly pulse jamming (PJ), pose significant challenges to system reliability.
• Understanding the impact of jamming parameters on bit error rates (BER) is essential for system design.

Purpose of the Study:

• To analyze the bit error rate (BER) performance of the Differential Chaos-based Spread Spectrum (DCSK) system under fast and slow switching pulse jamming (PJ).
• To derive analytical expressions for BER approximations.
• To investigate the influence of spreading factor and jamming duty cycle on system performance.

Main Methods:

• Derivation of analytical expressions for BER approximations using well-known special functions.
• Simulation and analysis of DCSK system performance under different PJ scenarios.
• Mathematical modeling to evaluate the impact of jamming duty cycle (ρ).

Main Results:

• Increasing the spreading factor enhances BER performance for both fast and slow switching PJ.
• Under fast switching PJ, BER is independent of jamming duty cycle (ρ) for ρ ≤ 0.5, but degrades for ρ > 0.5.
• Under slow switching PJ, increasing jamming duty cycle (ρ) can either enhance or degrade BER.

Conclusions:

• The spreading factor is a key parameter for improving DCSK system resilience against pulse jamming.
• The jamming duty cycle's impact on BER is complex and depends on the switching characteristics of the pulse jamming.
• These findings provide valuable insights for designing robust DCSK systems in jamming environments.