Method for eliminating jamming by OAM mode quadratic coordination

A method for eliminating jamming by OAM mode quadratic coordination, applied to a wireless communication anti-jamming system comprising a transmitter and a receiver;

• the method comprises:
• selecting at each hop, via the transmitter, a primary Orbital Angular Momentum (OAM) mode and a secondary OAM mode from N mutually orthogonal OAM modes being generated simultaneously;
• generating via the transmitter, a mode quadratic collaborative transformation sequence composed of a primary mode hopping basic sequence and a secondary multiple mode hopping basic sequence, based on a group of keys and real-time time self-defined by the transmitter and the receiver respectively;
• dividing via the transmitter, input binary information bits into OAM mode index information bits and signal modulation bits, and jointly designing a position distribution of the OAM mode index information bits and the signal modulation bits in an information frame structure, based on the mode quadratic collaborative transformation sequence;
• determining via the transmitter, G quadratic collaborative transformation OAM modes activated at each hop, from a plurality of OAM mode groups, wherein each of the G quadratic collaborative transformation OAM modes carries one constellation point symbol;
• loading via the transmitter, G quadratic collaborative transformation OAM modes carrying constellation point symbols onto each array element of an antenna to obtain G mutually orthogonal OAM mode quadratic collaborative transformation signals y, and transmitting the G mutually orthogonal OAM mode quadratic collaborative transformation signals y to the receiver;
• and
• performing via the receiver, inverse transformation and jamming signals elimination on received G mutually orthogonal OAM mode quadratic collaborative transformation signals y, and estimating a signal vector by searching the constellation point symbols.