Anti-Jamming Performance Analysis of CSS-Based Communication Systems

Due to its anti-jamming capability, chirp spread spectrum (CSS) technique has attracted much attention in the area of wireless communications. However, there has been little rigorous analysis for the anti-jamming performance of CSS-based communication systems. In this paper, we present analytic results on the anti-jamming performance of a CSS-based system: BER expressions are derived for a CSS-based differential quadrature phase shift keying (DQPSK) system in the presence of broadband jamming signals over additive white Gaussian noise (AWGN) and Rayleigh fading channels, respectively. The numerical results show that the empirical BER closely agrees with the analytic results and CSS-based DQPSK systems can provide a significant improvement in performance over the conventional DQPSK systems that do not incorporate the CSS.