Low Sidelobe Pseudo-Orthogonal Code Sets Through Particle Swarm Optimization

Future and emerging radar systems are experiencing growing reliance on MIMO functionality in order to support demand for finer resolution and greater data collection under increasingly stringent spectral requirements. In order to support MIMO functionality while preserving spectral usage requirements, pseudo-orthogonal waveform sets are desired. In order to balance the complicated and often contradicting parameter requirements involved in creating pseudo-orthogonal waveform sets, a particle swarm-based optimization technique is introduced. This technique is shown to be applicable to several types of pseudo-orthogonal code sets, including a polyphase coded waveform set and a non-linear frequency modulated waveform set formed utilizing a novel parameterization method.