基于光子矢量调制技术,首次提出了光域OOK到电域QPSK的直接转换方法。在提出的方案中,传送到宽带无线接入网中心站的光OOK信号无需光电转换成二进制基带信号,而是在光域直接进行转换,这样就避免了光-电-光转换,降低了系统的复杂性,并且克服了电子瓶颈问题。另外,使用了低硬件要求的PVM方案,降低了系统成本。理论与仿真分析结果论证了速率为2.5 Gbit/s的40 GHz毫米波的QPSK信号生成。

A new method has been proposed to convert optical OOK signal directly to electrical QPSK signal based on photonic vector modulation (PVM) technique for the first time. In our proposed new scheme, optical OOK signal transmitted to the central station of broadband wireless network is directly converted in optical field instead of O/E conversion to binary baseband signal, avoiding the O/E/O conversion, reducing the system complexity, and overcoming the electronic bottleneck problems. The scheme could also reduce system cost by employing PVM techniques with lower hardware requirements. Theoretical analysis and simulation result show that a 2.5 Gbit/s QPSK signal of 40GHz millimeter wave is generated successfully.