Impact of modulation index on transmission performance of millimeter wave multiband OFDM ultra-wide-band wireless signal over fiber system

Mohmoud Mohamed; Xiupu Zhang; Bouchaib Hraimel; Ke Wu

doi:10.1117/12.970377

24 October 2012 Impact of modulation index on transmission performance of millimeter wave multiband OFDM ultra-wide-band wireless signal over fiber system

Mohmoud Mohamed, Xiupu Zhang, Bouchaib Hraimel, Ke Wu

Author Affiliations +

Proceedings Volume 8412, Photonics North 2012; 84120S (2012) https://doi.org/10.1117/12.970377
Event: Photonics North 2012, 2012, Montréal, Canada

Abstract

Performance of millimeter-wave (mm-wave) multi-band orthogonal frequency division multiplexing (MB-OFDM) ultrawideband (UWB) signal over fiber transmission system is investigated considering impact of modulation index (MI). Experiments are conducted to verify our theoretical analysis and good agreement is obtained. In this work, we propose an optical frequency quadrupling technique using two cascaded Mach-Zehnder modulators (MZMs) biased at quadrature and driven by the same local oscillator frequency but with 1800 phase shift between the two MZMs. We demonstrate 30GHz mm-wave wireless that carries three-bands OFDM UWB signals, and error vector magnitude is used to analyze the transmission quality. It is found that the EVM decreases from ~-13.63 to -18.9 dB when increasing the LO modulation index (MI) from 66 to ~117%.

Citation Download Citation

Mohmoud Mohamed, Xiupu Zhang, Bouchaib Hraimel, and Ke Wu "Impact of modulation index on transmission performance of millimeter wave multiband OFDM ultra-wide-band wireless signal over fiber system", Proc. SPIE 8412, Photonics North 2012, 84120S (24 October 2012); https://doi.org/10.1117/12.970377

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KEYWORDS

Modulation

Phase shifts

Orthogonal frequency division multiplexing

Optical amplifiers

Signal attenuation

Signal generators

Oscillators

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