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首页> 外文期刊>Microwaves, Antennas & Propagation, IET >Optimising the performance of digital pulse interval modulation with guard slots for diffuse indoor optical wireless links
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Optimising the performance of digital pulse interval modulation with guard slots for diffuse indoor optical wireless links

机译:使用保护槽优化数字脉冲间隔调制的性能,以实现漫射室内光无线链路

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摘要

The intersymbol interference (ISI) in a diffuse indoor optical wireless communication channel limits the maximum data rate for error-free transmission. In this study, simpler decoding approaches are suggested for digital pulse interval modulation (DPIM) with guard slot(s) (GSs) to reduce the effect of ISI. The unique patterns in DPIM symbols with GSs are exploited to carry out optimum decoding without utilising an equaliser at the receiver. The simplest decoding approaches would be to find an optimum threshold level that offers the least power penalty. However, performance can be enhanced by employing a hybrid decoding scheme in which the amplitudes of adjacent slots are compared in order to carry out the slot decision. The decoding algorithm that maximises the likelihood of `one?? can offer the optimum performance. These decoding approaches are simpler to implement and offer a relatively high gain (.6 dB) at a moderately dispersive channel.
机译:漫射室内光无线通信信道中的符号间干扰(ISI)限制了无错误传输的最大数据速率。在这项研究中,为带保护时隙(GS)的数字脉冲间隔调制(DPIM)提出了更简单的解码方法,以减少ISI的影响。利用具有GS的DPIM符号中的独特模式,可以进行最佳解码,而无需在接收机处使用均衡器。最简单的解码方法将是找到提供最小功率损失的最佳阈值水平。然而,可以通过采用混合解码方案来增强性能,在该混合解码方案中,比较相邻时隙的幅度以便执行时隙确定。最大化“ one”可能性的解码算法可以提供最佳性能。这些解码方法更易于实现,并在中等色散信道上提供相对较高的增益(.6 dB)。

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  • 来源
    《Microwaves, Antennas & Propagation, IET》 |2011年第9期|p.1025-1030|共6页
  • 作者单位

    Optical Communication Research Group, School of Computing, Engineering and Information Sciences, Northumbria University, Intelligent Modelling Laboratory, School of Computing, Engineering and Information Sciences, Northumbria University;

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