|United States Of America||Issued Patent||9,906,262||02/27/2018||2013-901|
Full duplex wireless networks offer the capability of transmitting and receiving data at the same time over the same frequency channel and doubling the efficiency of the bandwidth. However, full duplex radios have been limited due to a fundamental issue known as self-interference cancelation (SIC). For SIC, there are four stages which can be used in sequence for maximum benefit: passive interference suppression, all-analog interference cancelation, hybrid interference cancelation, and all-digital interference cancelation.
Configuration of radio interference cancelation using CAPS (cables, attenuators and power splitters), which cancels the self-interference from the transmitter to the receiver.
University of California researchers have developed a new design for all-analog radio SIC using elementary components used in a new design of cables, attenuators, and power splitters. The CAPS method uses an all-analog cancelation channel using cables, attenuators, and power splitters.
qMultiple Input and Multiple Output (MIMO) radios