Anti-jamming system

An anti jamming system for a wireless communication system, the anti jamming system comprising:

• an antenna array comprising N antenna elements, wherein N is a non-zero positive integer;
• and
• a multiphase filter system comprising N first phase filter elements and a second phase filter element, each first phase filter element configured to receive an antenna element signal from a respective one of the antenna elements and provide a filter output, the second phase filter element configured to receive the filter outputs from the first phase filter elements;
• wherein the second phase filter element executes a maximin algorithm.

An anti jamming system for a wireless communication system, the anti jamming system comprising:

• an antenna array comprising N antenna elements, wherein N is a non-zero positive integer;
• a multiphase filter system comprising N first phase filter elements and a second phase filter element, each first phase filter element configured to receive an antenna element signal from a respective one of the antenna elements and provide a first phase filter output, the second phase filter element configured to receive the first phase filter outputs from the first phase filter elements and provide a second phase filter output;
• and
• a demodulator configured to receive the second phase filter output from the second phase filter element and provide at least one null beamforming pattern toward a narrowband or wideband jamming signal and/or provide a maximum beamforming pattern toward a desired signal direction.