In-band jamming/interference could be alleviated by performing direct correlation at the RF front-end through coding and decoding. In this paper, a chip-scale RF correlator is designed utilizing the monolithically integrated time-varying transmission line (TVTL). The proposed correlator is low-loss, has low noise figure and can handle large power. Both correlation and correlation/demodulation tests are carried out.

Q. Wu, X. Zou and Y. E. Wang, "Jamming Resilient Spread Spectrum Receiver with Time-Varying Transmission Line (TVTL) RF Correlator," 2020 IEEE Radio and Wireless Symposium (RWS), 2020, pp. 20-23, doi: 10.1109/RWS45077.2020.9050035.