Abstract:

By the limit of transmitter power and waveform energy, modern radar generally chooses constant modulus waveform to achieve the goal that maximum use of transmission power. We address the optimization problem of constant modular orthogonal waveform design for Phased-multiple input multiple output (MIMO) radar, and a new waveform optimal design framework for Phase-MIMO radar based on the matrix spectral approximation is presented. First, the number of subarray can be obtained by the requirements of signal to noise ratio (SNR), the beam of subarray is patterned according to the maximum SNR criterion, effectively improving the anti-jamming performance of the radar system. Then, the orthogonal waveform among subarray units is optimized via the iterative matrix spectral approximation algorithm (IMSAA), which has a better correlation performance and is more computationally efficient than multi-CAN. Finally, the constant modulus signal is optimally designed. Simulation results demonstrate the effectiveness of the proposed algorithm.