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首页> 外文期刊>Optical and quantum electronics >Error performance enhancement of satellite to earth FSO downlink employing hybrid subcarrier intensity modulation scheme with aperture averaging technique
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Error performance enhancement of satellite to earth FSO downlink employing hybrid subcarrier intensity modulation scheme with aperture averaging technique

机译：采用孔径平均技术的混合子载波强度调制方案增强星地FSO下行链路的误码性能

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摘要

In this work, we have evaluated the bit error rate (BER) of free space optical downlink using hybrid-subcarrier-intensity-modulation (hybrid-SIM) scheme. Also, we have employed the aperture averaging technique for the improvement of its error performance. The required BER analysis has been performed over the gamma-gamma channel model with the scintillation effects. The BER analysis is simplified using Meijer-G function and it is simulated in MATLAB. The simulation results show that the improvement in error performance is observed by hybrid-SIM technique compared to other modulation schemes like PPM and BPSK-SIM and also the BER improves significantly with the increase of aperture size due to the aperture averaging effect.
机译：在这项工作中，我们使用混合子载波强度调制（Hybrid-SIM）方案评估了自由空间光下行链路的误码率（BER）。另外，我们采用了孔径平均技术来改善其误差性能。在具有闪烁效应的gamma-gamma通道模型上执行了所需的BER分析。使用Meijer-G函数简化了BER分析，并在MATLAB中对其进行了仿真。仿真结果表明，与其他调制方案（如PPM和BPSK-SIM）相比，混合SIM技术可观察到错误性能的改善，并且由于孔径平均效应，BER随着孔径的增加而显着提高。

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