Brief description not available

Brief description not available

A key challenge in utilizing full-duplex radio is self-interference cancellation (SIC).  One component of SIC, transmission noise, severely limits full-duplex as no digital or hybrid methods has any built in mechanism to deal with transmission noise.   General Diagram    

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. 

Background: The demand for increase in efficiency of wireless networks is rapidly growing along with the use of smartphones and tablets. Full duplex wireless networks offer the capability of transmitting and receiving data over the same time and frequency channel, doubling the efficiency of the bandwidth.  A key challenge in utilizing a full-duplex radio is that it is limited by self-interference cancellation (SIC), as there are no digital or hybrid methods that have built in mechanisms dealing with transmission noise. Description: UCR researchers have developed a method to overcome SIC by employing a technique where the primary antenna receives or transmits data while the secondary antenna cancels interference. They have also developed a closed-loop, digitally controlled and analog interfaced method to recover a weak signal in the presence of a stronger signal. The final structure of the system is such that all interference and major noise sources have a zero or minimum net contribution to the received digital signals. Furthermore, the all-analog radios for self-interference cancellation will have a new design of cables, attenuators, and power splitters.