Lasers, Fiber Optics, and Communications

Efficient phase-switch quadrature phase shift keying modulation scheme in radio over fiber system

[+] Author Affiliations
Xiao Li, Zhaoyuan Kang, Xuwei Xue

Shandong University, School of Information Science and Engineering, No. 27, Shanda South Road, Jinan, Shandong 250100, China

Wei Ji

Shandong University, School of Information Science and Engineering, No. 27, Shanda South Road, Jinan, Shandong 250100, China

Inspur Corporation, State Key Laboratory of High-End Server & Storage Technology, No. 1036, Tide Road, Jinan, Shandong 250014, China

Opt. Eng. 54(5), 056103 (May 15, 2015). doi:10.1117/1.OE.54.5.056103
History: Received January 19, 2015; Accepted April 21, 2015
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Abstract.  A phase-switch quadrature phase shift keying (PS-QPSK) modulation scheme is proposed for the radio-over-fiber (ROF) transmission system. In the downlink, the 60 GHz mm wave modulated by QPSK is generated by heterodyne detection. Systems implement compensation of chromatic dispersion with blind equalizations in the time domain and synchronization with the training sequence. The performance of the systems is evaluated in terms of constellation diagrams, bit error rate diagrams, and error vector magnitude. The effect of nonlinear crosstalk, in-phase/quadrature (IQ) mismatch of transmitter (Tx) and receiver (Rx) are taken into account in the performance evaluation. The PS-QPSK mechanism is analyzed comprehensively and systematically in an ROF system. In addition, the performance of the proposed system is compared to that of a traditional one adopting a phase-multiplexing quadrature phase shift keying (PM-QPSK) scheme. It reveals that the PS-QPSK-ROF system has a higher tolerance to nonlinear crosstalk and IQ mismatch than a PM-QPSK-ROF system.

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© 2015 Society of Photo-Optical Instrumentation Engineers

Citation

Xiao Li ; Wei Ji ; Zhaoyuan Kang and Xuwei Xue
"Efficient phase-switch quadrature phase shift keying modulation scheme in radio over fiber system", Opt. Eng. 54(5), 056103 (May 15, 2015). ; http://dx.doi.org/10.1117/1.OE.54.5.056103


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