Joint Pulsed and Continuous Wave Interference Suppression for Dual-Antenna GNSS Receivers

Array antenna is an effective way to improve the interference suppression capability of global navigation satellite System (GNSS) receivers. However, more antennas mean higher costs, which may lead to unacceptable costs in the civil fields. Dual-antenna provides a better compromise between cost and interference suppression capability for those applications in the civil fields. This article proposes a joint-pulsed and continuous wave (CW) interference suppression algorithm for dual-antenna GNSS receivers. To avoid the lack of freedom of the dual antenna, pulsed and CW interference will be suppressed separately. First, in order to avoid the impact of pulses on CW interference suppression capability, a robust covariance matrix estimation method and space-time adaptive processing power inversion algorithm are combined to suppress CW interference. In this stage, the pulses will be deliberately preserved as much as possible. Second, the residual pulses will be suppressed by utilizing a robust pulsed interference suppression method. Simulations and experiments demonstrate that the proposed algorithm can simultaneously suppress joint pulsed and CW interference for a dual-antenna GNSS receiver.