Abstract: Systems and methods for wireless simultaneous transmit and receive (STAR) using multi-input multi-output (MIMO) radiofrequency (RF) front-ends are provided. A MIMO front-end can be based on the use of a symmetrical pair of arrays, in which one is used for communication while the other is used inside an RF-shielded chamber to act as a reference for subtracting self-interference between transmitters and receivers. In addition to the two arrays, the symmetry of the system can include two identical passive microwave multi-beam beamforming networks. The beamformer networks can be, for example, Butler Matrix based, true-time delay microwave networks, or Rotman lens based.

Abstract: Systems and methods for wireless simultaneous transmit and receive (STAR) using multi-input multi-output (MIMO) radiofrequency (RF) front-ends are provided. A MIMO front-end can be based on the use of a symmetrical pair of arrays, in which one is used for communication while the other is used inside an RF-shielded chamber to act as a reference for subtracting self-interference between transmitters and receivers. In addition to the two arrays, the symmetry of the system can include two identical passive microwave multi-beam beamforming networks. The beamformer networks can be, for example, Butler Matrix based, true-time delay microwave networks, or Rotman lens based.

Abstract: A system and corresponding method may be employed for real-time ultrabroadband wireless communications. The system comprised a plurality of in-phase and quadrature (IQ) mixers that produce, in real-time on a per-channel basis, sub-channel signals from respective analog baseband IQ signals representing respective portions of user data. The system further comprises a power combiner. The power combiner produces a multi-channel output signal by frequency multiplexing, in real-time, the sub-channel signals produced. The multi-channel output signal represents the user data in its entirety and may be a real-time, multi-GHz wireless signal.