Joint PN Code Acquisition and Beamforming based on Maximizing SINR under Jamming

In the direct sequence spread spectrum(DSS) telemetry system with multi-antennas, joint PN code acquisition and digital beamforming exploits the array gain during the PN code acquisition, which improve the acquisition performance under small SNR (signal-to-noise). Considered the problem of multi-objective telemetry and control with large spread spectrum factor under jamming, the disabled application of combing PN code acquisition with weights searching based on NLMS algorithm is analyzed and a novel joint code acquisition and adaptive beamforming maximizing the signal-to-interference-plus-noise-ratio (SINR) is proposed, in which the signal power is estimated from the output of sliding correlator and digital beamforming is completed adaptively to maximize the SINR. Simulation results show that the proposed joint PN code acquisition and beamforming approach has better performance and it is effective to complete PN code acquisition and digital beamforming rapidly with small SNR and strong jamming, which has been used successfully in a telemetry system.