Performance Analysis of BCH and Repetition Codes in Gamma-Gamma Faded FSO Link

2019 National Conference on Communications (NCC) Pub Date : 2019-02-01 DOI:10.1109/NCC.2019.8732226

Sonali, N. Gupta, A. Dixit, V. Jain

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引用次数: 10

Abstract

In this research paper, we have analyzed free space optical (FSO) link performance for intensity modulated/direct detection system. FSO communication link is key to the next generation 5G/10G wireless networks. Generally, FSO link performance is impaired by atmospheric turbulence. Utilizing error correcting codes (ECCs) is one of the mitigation techniques employed to reduce the impact of atmospheric turbulence. We explore Bose-Chaudhuri-Hocquenghem (BCH) and repetition codes for mitigating the effects caused by atmospheric turbulence. We have made the performance comparison in terms of bit error rate (BER) under different turbulence regimes, viz., low, moderate and high regime for both uncoded and coded systems. We evaluate the analytical results and validate them with the simulations. It is concluded that BCH coded system performance is always better than the repetition coded system in all the turbulence regimes. BCH coded system provide a coding gain of 23.4 dB at a high turbulence level which reduces to 17.5 dB and 5 dB at moderate and low turbulence regimes, respectively. However, when we combine the benefits of both the coding schemes, the performance improvement obtained is much higher when compared with both the codes individually. It is, of course, at the cost of an increase in transmission bandwidth requirement.

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伽玛-伽玛衰落FSO链路中BCH和重复码的性能分析

在本文中，我们分析了强度调制/直接检测系统的自由空间光(FSO)链路性能。FSO通信链路是下一代5G/10G无线网络的关键。一般来说，FSO链路的性能会受到大气湍流的影响。利用纠错码(ECCs)是减少大气湍流影响的缓解技术之一。我们探讨了Bose-Chaudhuri-Hocquenghem (BCH)和重复码来减轻大气湍流造成的影响。我们对不同湍流状态下的误码率(BER)进行了性能比较，即非编码和编码系统的低、中、高湍流状态。对分析结果进行了评价，并用仿真验证了分析结果。结果表明，在所有湍流状态下，BCH编码系统的性能都优于重复编码系统。BCH编码系统在高湍流条件下的编码增益为23.4 dB，在中湍流和低湍流条件下分别降低到17.5 dB和5 dB。然而，当我们结合这两种编码方案的优点时，与单独使用这两种编码相比，所获得的性能改进要高得多。当然，这是以传输带宽需求的增加为代价的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2019 National Conference on Communications (NCC)

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