Full-Duplex Scatterer Control Unit for Self-Interference

The patent introduces a new spatial dimension by deploying scatterers in three-dimensional space around the full-duplex node. Instead of only controlling signal direction in the traditional two-dimensional antenna plane, the system utilizes scatterers positioned at various heights and radial distances, creating additional spatial degrees of freedom for interference management while preserving coverage.

The patent employs passive scatterers as intermediary elements that reflect and redirect the transmitted signal toward the intended receiver. These scatterers act as mediators that enable the transmitted signal to reach the receiver without directly exposing the receiver to the high-powered self-interference from the co-located transmitter, thus reducing self-interference while maintaining signal delivery.

The patent moves the isolation function from the horizontal plane (traditional antenna separation) to the vertical and radial dimensions by deploying scatterers at elevated positions and varying distances from the node. This three-dimensional arrangement achieves effective signal isolation while maintaining a compact horizontal footprint that satisfies form factor constraints.

The scatterers serve as intermediary reflective elements that enable signal transmission without requiring direct line-of-sight paths or large physical separations between transmitter and receiver antennas. This intermediary approach achieves propagation domain mitigation within the constrained form factor of the full-duplex node.

The patent creates different signal qualities in different spatial directions by using beamforming combined with scatterer reflection. The transmitted signal is directed toward the intended receiver through scattered paths, while the self-interference is suppressed in the direction of the receiver antenna. This spatial differentiation allows the receiver to obtain sufficient signal power while self-interference remains low.

The scatterers act as intermediaries that enable the transmitted signal to reach the receiver through reflected paths, allowing the system to maintain adequate signal power at the receiver without requiring high transmit power that would generate excessive self-interference. The intermediary reflection paths provide signal delivery while isolating the receiver from direct self-interference.