Scholarlink

<p>All-Optical Orthogonal Frequency Division Multiplexing (AO-OFDM) is a promising technique for high-capacity optical communication. However, its practical application is constrained by a high peak-to-average power ratio (PAPR). This paper describes a 100 Gbps All-Optical OFDM architecture for a radio-over-fibre system that uses optical couplers and phase shifters to realise various optical transforms. A phase pre-emphasis technique is used to reduce PAPR. The performance of DHWT, DFT, DHT, and DCT is evaluated in terms of PAPR and BER versus OSNR. Simulation results show that phase pre-emphasis significantly reduces PAPR by 3–4&#xa0;dB while maintaining acceptable BER performance, and DHWT-based AO-OFDM outperforms other transforms. At the CCDF of <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(10^{ - 3}\)</EquationSource> </InlineEquation> the proposed DHWT had a PAPR of around 8.2&#xa0;dB, which was lower than the existing 9.6&#xa0;dB DFT-based AO-OFDM. These results confirm that the proposed DHWT-based AO-OFDM has a lower PAPR than the existing DFT, indicating increased power efficiency. Furthermore, for N = 16 subcarriers, both DHWT and DFT require 64 couplers and 64 phase shifters, while DHT and DCT eliminate optical phase shifters, retaining the same number of optical couplers, resulting in lower hardware complexity and insertion loss.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Comparative study on the performance of all-optical OFDM with minimised PAPR

  • 期刊论文

  • 发表日期：

    2026年4月1日

查看全文
  • Sreedevi Balakrishnan

摘要

All-Optical Orthogonal Frequency Division Multiplexing (AO-OFDM) is a promising technique for high-capacity optical communication. However, its practical application is constrained by a high peak-to-average power ratio (PAPR). This paper describes a 100 Gbps All-Optical OFDM architecture for a radio-over-fibre system that uses optical couplers and phase shifters to realise various optical transforms. A phase pre-emphasis technique is used to reduce PAPR. The performance of DHWT, DFT, DHT, and DCT is evaluated in terms of PAPR and BER versus OSNR. Simulation results show that phase pre-emphasis significantly reduces PAPR by 3–4 dB while maintaining acceptable BER performance, and DHWT-based AO-OFDM outperforms other transforms. At the CCDF of \(10^{ - 3}\) the proposed DHWT had a PAPR of around 8.2 dB, which was lower than the existing 9.6 dB DFT-based AO-OFDM. These results confirm that the proposed DHWT-based AO-OFDM has a lower PAPR than the existing DFT, indicating increased power efficiency. Furthermore, for N = 16 subcarriers, both DHWT and DFT require 64 couplers and 64 phase shifters, while DHT and DCT eliminate optical phase shifters, retaining the same number of optical couplers, resulting in lower hardware complexity and insertion loss.