Phase Noise Cancellation Performance in Self-Heterodyning Transceivers for Millimeter-Wave Wireless Backhaul Applications

This paper presents a novel system architecture for small cell base stations with integrated millimeter-wave wireless backhaul. In contrast to existing systems, the data signal on the wireless backhaul uses the same 3GPP compliant signal format than on the access link serving the users. Furthermore, the small cell omits the 60GHz local oscillator source completely by using the self-heterodyning mixing approach and transmits only a suppressed carrier. Measurements on a simplified setup with a single-carrier WCDMA signal prove that due to successful phase noise cancellation the 3GPP ACLR and EVM requirements are easily met, even with 15dB dynamic range on the backhaul link. Moreover, the captured spectrum of an LTE signal with 20MHz bandwidth demonstrates the required broadband capability of our concept.