Performance evaluation of novel optical-wireless variable N-parallel code-shift-keying

2016 10th International Conference on Signal Processing and Communication Systems (ICSPCS) Pub Date : 2016-12-01 DOI:10.1109/ICSPCS.2016.7843359

Keisuke Osawa, H. Habuchi, Y. Kozawa

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引用次数: 2

Abstract

The indoor visible light communications have mainly the two serious problems; the bit error rate (BER) deterioration due to interference from ambient light and change of the data transmission efficiency according to dimming level. To settle the above problems, in this paper, the variable N-parallel code-shift-keying (VN-CSK) system with modified prime sequence codes (MPSC) for indoor visible light communications is considered. The VN-CSK system with MPSC achieves the same transmission efficiency by changing the number of the codes to select from M MPSCs depending on light regulation data. For example, if the number of MPSC is 5, the VN-CSK system with MPSC can realize 4 stages of dimming level. Moreover, the VN-CSK system with MPSC can suppress the influence of co-channel interference by using the group characteristics of MPSC. The bit error rate performance of the VN-CSK system with MPSC is evaluated in optical wireless channel by theoretical analysis. The VN-CSK system with MPSC can realize BER 10−6 when average received optical power per code is −49 [dBm] and the desired signal to interference signal ratio Pw/Pi ≥ 3 [dB].

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新型光无线变n并行码移键控的性能评价

室内可见光通信主要存在两个严重的问题;由于环境光的干扰而导致的误码率(BER)下降以及数据传输效率随调光水平的变化。为了解决上述问题，本文研究了一种基于改进素数序列码(MPSC)的室内可见光通信变n并行码移键控(VN-CSK)系统。采用MPSC的VN-CSK系统通过根据光调节数据改变从M个MPSC中选择的码数来实现相同的传输效率。例如，如果MPSC的个数为5，则具有MPSC的VN-CSK系统可以实现4级调光级别。此外，带MPSC的VN-CSK系统可以利用MPSC的群特性抑制同信道干扰的影响。通过理论分析，评价了带MPSC的VN-CSK系统在光无线信道中的误码率性能。当单码平均接收光功率为−49 [dBm]，期望信噪比Pw/Pi≥3 [dB]时，采用MPSC的VN-CSK系统可以实现BER 10−6。

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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2016 10th International Conference on Signal Processing and Communication Systems (ICSPCS)

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