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Electronics and Telecommunications Research Institute (한국전자통신연구원)
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16-QAM OFDM-Based W-Band Polarization-Division Duplex Communication System with Multi-gigabit Performance

  • Kim, Kwang Seon (Broadcasting & Telecommunications Media Research Laboratory, ETRI) ;
  • Kim, Bong-Su (Broadcasting & Telecommunications Media Research Laboratory, ETRI) ;
  • Kang, Min-Soo (Broadcasting & Telecommunications Media Research Laboratory, ETRI) ;
  • Byun, Woo-Jin (Broadcasting & Telecommunications Media Research Laboratory, ETRI) ;
  • Park, Hyung Chul (Department of Electronic and IT Media Engineering, Seoul National University of Science and Technology)
  • Received : 2013.09.22
  • Accepted : 2014.02.13
  • Published : 2014.04.01
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Abstract

This paper presents a novel 90 GHz band 16-quadrature amplitude modulation (16-QAM) orthogonal frequency-division multiplexing (OFDM) communication system. The system can deliver 6 Gbps through six channels with a bandwidth of 3 GHz. Each channel occupies 500 MHz and delivers 1 Gbps using 16-QAM OFDM. To implement the system, a low-noise amplifier and an RF up/down conversion fourth-harmonically pumped mixer are implemented using a $0.1-{\mu}m$ gallium arsenide pseudomorphic high-electron-mobility transistor process. A polarization-division duplex architecture is used for full-duplex communication. In a digital modem, OFDM with 256-point fast Fourier transform and (255, 239) Reed-Solomon forward error correction codecs are used. The modem can compensate for a carrier-frequency offset of up to 50 ppm and a symbol rate offset of up to 1 ppm. Experiment results show that the system can achieve a bit error rate of $10^{-5}$ at a signal-to-noise ratio of about 19.8 dB.

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