Performance Analysis of Real-Time Full-Duplex E-band Link

In this paper, a performance analysis of a full-duplex E-band link is reported. The transmission system is operated with a real-time capable modem as a digital signal processing unit with broadband mixed-signal blocks. The measurement has been done with a 1.425 gigabaud-per-second data rate transmission for higher order modulations. A raised-cosine pulse-shaping filter is used with a 0.5 roll-off factor. A residual bit-error-rate which is below the forward-error correction limit is measured. The uplink (81–86 GHz band) transceiver and the downlink (71–76 GHz band) transceiver of the E-band duplex-link provide a 64-QAM transmission which has a 7.5 gigabit-per-second data-rate with a back-to-back configured setup. The 32-QAM and the 16-QAM which provide 6.2 and 5 gigabit-per-second data transmission, respectively are analyzed as well. The paper analyzes the influence of the main analog front-end impairments, noise and amplifier compression, including a real-time capable modem sensitivity over the entire full-duplex E-band communication system performance, i.e. their upper and lower threshold limit for the received power, for different modulation formats and relates these limits to the power compression of the analog frontend's transfer characteristics.