Demonstration of LDPC-coded PS-64QAM OFDM employing novel bit-class distribution matching in a W-band RoF system

【摘要】 In this work, we proposed and experimentally demonstrated a novel probabilistic shaping(PS) 64-ary quadrature amplitude modulation(QAM) orthogonal frequency division multiplexing(OFDM) with low-density parity-check(LDPC)-coded modulation in a W-band radio-over-fiber(RoF) system using envelope detection. The proposed PS scheme has the advantages of no complex multiplication and division operations and low hardware implementation complexity. In our experiments, the two-stage bit weight distribution matching-based PS-64QAM OFDM signals with a rate of 28.13 Gb/s transmission over 4 m wireless + 45-km standard single-mode fiber transmission can be achieved. The system performance is investigated under one LDPC code rate(3/4) and two PS parameter values (k = 3 and 9). The experimental results show that the receiver power sensitivity and the system fiber nonlinear effect tolerance can be significantly improved compared with uniformly distributed OFDM signals.更多还原

【Abstract】 In this work, we proposed and experimentally demonstrated a novel probabilistic shaping(PS) 64-ary quadrature amplitude modulation(QAM) orthogonal frequency division multiplexing(OFDM) with low-density parity-check(LDPC)-coded modulation in a W-band radio-over-fiber(RoF) system using envelope detection. The proposed PS scheme has the advantages of no complex multiplication and division operations and low hardware implementation complexity. In our experiments, the two-stage bit weight distribution matching-based PS-64QAM OFDM signals with a rate of 28.13 Gb/s transmission over 4 m wireless + 45-km standard single-mode fiber transmission can be achieved. The system performance is investigated under one LDPC code rate(3/4) and two PS parameter values(k = 3 and 9). The experimental results show that the receiver power sensitivity and the system fiber nonlinear effect tolerance can be significantly improved compared with uniformly distributed OFDM signals.更多还原