Ultrahigh capacity 2 × 2 MIMO RoF system at 60 GHz employing single-sideband single-carrier modulation.
Ultrahigh capacity 2 × 2 MIMO RoF system at 60 GHz employing single-sideband single-carrier modulation.
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DOI：
10.1364/ol.39.001358
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发表时间：
2014-03
期刊：
影响因子：
3.6
通讯作者：
Chun-Ting Lin;C. Ho;Hou-Tzu Huang;Yu-Hsuan Cheng
中科院分区：
文献类型：
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作者：
Chun-Ting Lin;C. Ho;Hou-Tzu Huang;Yu-Hsuan Cheng
本文提出并实验演示了一种在60 GHz采用单边带单载波（SSB-SC）调制的光纤无线电系统。SSB-SC调制具有比正交频分复用（OFDM）调制更低的峰均功率比;因此，与OFDM信号相比，SSB-SC信号提供上级非线性容限。此外，多输入多输出（MIMO）技术被广泛用于提高频谱效率。实现了一种基于最小均方的均衡器，包括MIMO信道估计、频率响应均衡和I/Q不平衡补偿，以恢复MIMO信号。因此，使用2×2 MIMO技术和64-QAM SSB-SC信号，我们在60 GHz的7 GHz免许可频段实现了84 Gbps的最高数据速率和12 bit/s/Hz的频谱效率。
This article proposes and experimentally demonstrates a radio-over-fiber system employing single-sideband single-carrier (SSB-SC) modulation at 60 GHz. SSB-SC modulation has a lower peak-to-average-power ratio than orthogonal frequency division multiplex (OFDM) modulation; therefore, the SSB-SC signals provide superior nonlinear tolerance, compared to OFDM signals. Moreover, multiple-input multiple-output (MIMO) technology was used extensively to enhance spectral efficiency. A least-mean-square-based equalizer was implemented, including MIMO channel estimation, frequency response equalization, and I/Q imbalance compensation to recover the MIMO signals. Thus, using 2×2 MIMO technology and 64-QAM SSB-SC signals, we achieved the highest data rate of 84 Gbps with 12 bit/s/Hz spectral efficiency using the 7-GHz license-free band at 60 GHz.