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Impact of AC coupling on zero-IF architectures for wide-band millimeter-wave gigabit transmitters

: Rezola, A.; Río, D. del; Sevillano, J.F.; Leyh, M.; Berenguer, R.; Vélez, I.

Informationstechnische Gesellschaft -ITG-:
European Wireless 2014. Proceedings CD-ROM : 20th European Wireless Conference. Centre Tecnològic de Telecomunicacions de Catalunya (CTTC), 14-16 May 2014, Barcelona, Spain
Berlin: VDE-Verlag, 2014
ISBN: 978-3-8007-3621-8
European Wireless Conference (EW) <20, 2014, Barcelona>
Fraunhofer IIS ()

This paper considers the design of a transceiver able to provide a data rate of 10Gbps for the backhaul of the future mobile network. The paper describes a zero-IF architecture to support 64-QAM and a bandwidth of 2GHz in E-Band. Zero-IF architectures present several impairments that corrupt the information bearing base-band signal around DC. The paper reviews these issues paying special attention to the AC couplings in the transceiver analog chain. This RF impairment is modelled at system level and its impact on transceiver performance is evaluated. The results presented in the paper highlight the importance of this RF impairment for high-order modulation. It is shown that the destruction of more than 0.01% of the signal in 64-QAM can yield an important loss in performance.