Delivery of Polarization-Division-Multiplexing Wireless Millimeter-Wave Signal over 4.6-km at W-Band

Abstract

We proposed and established a large-capacity, long-distance wireless millimeter-wave (mm-wave) signal delivery system at W-band based on photonics-aided mm-wave generation technology, polarization-division-multiplexing (PDM), and advanced devices. We demonstrated the wireless transmission of 10-Gbaud PDM-QPSK, PDM-16QAM, and PDM-PS-64QAM mm-wave signals in the W-band up to 4.6-km, respectively. The multiple-input multiple-output (MIMO) Volterra equalizer (VE) is employed during the Rx offline digital signal processing (DSP) to compensate for impairments and further improve the system transmission performance. Our demonstrated system can generate and deliver 10-Gbaud (110 Gb/s) PDM-PS-64QAM (5.5 bits/symbol/polarization) mm-wave signal at 88.5-GHz over 4.6-km wireless distance with a bit-error-rate (BER) below the soft-decision forward error correction (SD-FEC) threshold of 2.4 × 10^−2. Considering the SD-FEC threshold of 2.4×10^-2 with 20% overhead, the maximum net rate of 91.6 Gb/s in this system can be achieved. To the best of the authors' knowledge, it's the first time to demonstrate single-carrier PDM-PS-64QAM (91.6 Gb/s) wireless mm-wave signal delivery over 4.6 km at W-band.