基于OTFS的Link16速率增强波形设计

Link16 data link has attracted much attention due to its capabilities of anti-jamming and high security. However, Link16 is difficult to meet the transmission requirements of image and video because its highest transmission rate is 115kbps. So this thesis proposes a transmission-rate-enhanced waveform for Link16 based on Orthogonal Time Frequency Space (OTFS), QPSK modulation and Turbo code are combined with OTFS in the waveform to give significantly improved performance. The performances of transmission-rate-enhanced Link16 waveform based on OTFS and traditional multi-carrier modulation are compared through computer simulation. Simulation results show that the performance of OTFS is better than traditional multi-carrier modulation in high Doppler scenarios. In addition, this paper proposes a low-complexity equalizer based on 2-D deconvolution to improve the performances of OTFS. Simulation results indicate that the proposed equalization method has lower complexity and similar performance with the traditional equalizer.