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首页> 外文期刊>Optics Communications: A Journal Devoted to the Rapid Publication of Short Contributions in the Field of Optics and Interaction of Light with Matter >Proposal and performance analysis on the PDM microwave photonic link for the mm-wave signal with hybrid QAM-MPPM-RZ modulation
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Proposal and performance analysis on the PDM microwave photonic link for the mm-wave signal with hybrid QAM-MPPM-RZ modulation

机译：混合QAM-MPPM-RZ调制的MM波信号PDM微波光子链路的提案和性能分析

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摘要

A polarization division multiplexed (PDM) microwave photonic link for the millimeter (MM)-wave signal with hybrid modulation scheme is proposed in this paper, which is based on the combination of quadrature amplitude modulation, multi-pulse pulse-position modulation and return to zero modulation (QAM-MPPM-RZ). In this scheme, the two orthogonal polarization states enable simultaneous transmission of four data flows, which can provide different services for users according to the data rate requirement. To generate hybrid QAM-MPPM-RZ mm-wave signal, the QAM mm-wave signal is directly modulated by MPPM-RZ signal without using digital signal processing (DSP) devices, which reduces the overhead of the encoding process. Then, the generated QAM-MPPM-RZ mm-wave signal is transmitted in PDM microwave photonic link based on SSB modulation. The sparsity characteristic of QAM-MPPM-RZ not only improves the power efficiency, but also decreases the degradation caused by the fiber chromatic dispersion. The simulation results show that, under the constraint of the same transmitted data rate, the PDM microwave photonic link with 50 GHz QAM-MPPM-RZ mm-wave signal achieves much lower levels of bit-error rate than ordinary 32-QAM. In addition, the increase of laser linewidth brings no additional impact to the proposed scheme.
机译：本文提出了具有混合调制方案的毫米（MM）-Wave信号的偏振分割多路复用（PDM）微波光子光子链路，其基于正交幅度调制，多脉冲脉冲位置调制和返回的组合零调制（QAM-MPPM-RZ）。在该方案中，两个正交偏振状态能够同时传输四个数据流，这可以根据数据速率要求为用户提供不同的服务。为了产生混合动力QAM-MPPM-RZ MM波信号，QAM MM波信号通过MPPM-RZ信号直接调制而不使用数字信号处理（DSP）设备，这减少了编码过程的开销。然后，基于SSB调制，在PDM微波光子链路中传输产生的QA​​M-MPPM-RZ MM波信号。 QAM-MPPM-RZ的稀疏性特性不仅可以提高功率效率，而且还降低了光纤色散引起的劣化。仿真结果表明，在相同的传输数据速率的约束下，具有50GHz QAM-MPPM-RZ MM波信号的PDM微波光子链路达到比普通32-QAM的比特误差率较低。此外，激光线宽的增加对所提出的方案没有额外的影响。

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