Applications of Code-Domain Signal Processing for Full-Duplex Radio

A full-duplex receiver (FDRX) can use the orthogonality properties of pseudo-noise codes to reject transmitter (TX) self-interference (SI) in the RF domain, allowing simultaneous transmit and receive (STAR) operation in the same frequency channel. Additionally, the code-domain signal processing improves the performance of radios in multipath environments while avoiding the fading effects of multipath channels. Implementation of code-domain signal processing techniques based on 45nm RFSOI processes demonstrates a combination of RFIC solutions for the FDRX and TX coding that yield more than 100dB of dynamic range with minimal power penalty including clock power consumption.