Abstract
With broader available bandwidth, W-band wireless transmission has attracted a lot of interests for future Giga-bit communication. In this article, we experimentally demonstrate W-band radio-over-fiber (RoF) system employing single-sideband single-carrier (SSB-SC) modulation with lower peak-to-average-power ratio (PAPR) than orthogonal frequency division multiplex (OFDM). To overcome the inter-symbol interference (ISI) of the penalty from uneven frequency response and SSB-SC modulation, frequency domain equalizer (FDE) and decision feedback equalizer (DFE) are implemented. We discuss the maximum available bandwidth of different modulation formats between SSB-SC and OFDM signals at the BER below forward error correction (FEC) threshold (3.8 × 10(-3)). Up to 50-Gbps 32-QAM SSB-SC signals with spectral efficiency of 5 bit/s/Hz can be achieved.
Highlights
With the increasing demand of broadband wireless communications, millimeter wave communication such as V-band (57-64 GHz) and W-band (75-110 GHz) have attracted a lot of interests to provide more than 10-Gbps wireless applications due to larger bandwidth
The spectra of 20-GHz double-sideband single-carrier (DSB-SC), 10-GHz single-sideband single-carrier (SSB-SC), and 10-GHz orthogonal frequency division multiplex (OFDM) signals with the same data rate are shown in the insets of (a) to (c) in the Fig. 2
The SSB-SC signals have 3.5 dB better in power sensitivity than the OFDM signals at the bit error rate (BER) of 3.8 × 10−3. This is because the SSB-SC signals have lower peak-to-average-power ratio (PAPR) as shown in Fig. 2, resulting in higher signal to noise ratio (SNR)
Summary
With the increasing demand of broadband wireless communications, millimeter wave communication such as V-band (57-64 GHz) and W-band (75-110 GHz) have attracted a lot of interests to provide more than 10-Gbps wireless applications due to larger bandwidth. Several W-band RoF systems have been proposed and experimentally demonstrated by using remote up-conversion with photonic transmitter-mixer, self-coherent heterodyne, and multiinput multi-output (MIMO) technology with coherent heterodyne or polarization division multiplexing [3,4,5,6,7]. 20-Gbps OOK wireless signal (from 83 to 103 GHz) by utilizing active near-ballistic uni-traveling-carrier photodiode was achieved with 25-km fiber transmission [4]. OFDM-RoF employing direct-detection (DD) technology was proposed to reduce the complexities of system and to achieve high spectrally-efficient signals transmission [8]. With 32-QAM SSB-SC signals occupied from 98 to 108 GHz, up to 50-Gbps data rate with the bit error rate (BER) below forward error correction (FEC) threshold (3.8 × 10−3) can be achieved following 25-km fiber and 2-m wireless transmission. To the best authors' knowledge, the highest spectral efficiency of 5 bit/s/Hz can be attained in W-band RoF communication system
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